Si2457/34/15/04 ® V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA Features  This data sheet applies to Si2457/34/  Integrated DAA 15/04 Revision D Over 6000V capacitive  Data modem formats isolation ITU-T, Bell Parallel phone detect 300bps up to 56kbps Globally-compliant line V.21,V.22, V.29 Fast Connect interface V.44, V.42, V.42bis, MNP2-5 Overcurrent detection Automatic rate negotiation  AT command set support  Type I and II caller ID decode  SMS / MMS support Ordering Information  No external ROM or RAM required  Firmware upgradeable  UART, SPI, or parallel interface  EEPROM interface This data sheet is valid only for those chipset combinations listed  Flexible clock options  Lead-free, RoHS-compliant Low-cost 32.768kHz oscillator packages on page50. 4.915MHz oscillator  Commercial or industrial 27MHz clock input temperature range Pin Assignments  DTMF detection/generation Applications Si2457/34/15/04  Set-top boxes  Digital video recorder (16-Pin Option)  Point-of-sale terminals  Digital televisions CLKIN/XTALI 1 16 SS/RTS XTALO 2 15 DCD  Text / video telephones  Remote monitoring RI 3 14 ESC VD 4 13 VA MISO/RXD 5 12 GND Description MOSI/TXD 6 11 INT SCLK/CTS 7 10 C1A The ISOmodem® family of products is a complete modem ranging in speed RESET 8 9 C2A from 56,000bps to 2400bps. Offered as a chipset with the Si2457, Si2434, Si2415, or Si2404 system-side device and the Si3018/10 line-side device, Si2457/34/15/04 (24-Pin Option) the ISOmodem utilizes Silicon Laboratories’ patented direct access CLKIN/XTALI 1 24 SDO/EECLK/D5 arrangement (DAA) technology to provide a programmable telephone line XTALO 2 23 DCD/D4 interface with an unparalleled level of integration. These compact solutions CLKOUT/EECS/A0 3 22 ESC/D3 eliminate the need for a separate DSP, modem controller, codec, FSYNC/D6 4 21 VD3.3 VD3.3 5 20 GND transformer, relay, opto-isolators, clocking crystal, and 2-4 wire hybrid. GND 6 19 VDB Available with a system-side packaging option of either a 16-pin SOIC or a VDA 7 18 SDI/EESD/D2 24-pin TSSOP, these devices are ideal for embedded modem applications SS/RTS/D7 8 17 RI/D1 MISO/RXD/RD 9 16 INT/DO due to their flexibility, small footprint, and minimal external component MOSI/TXD/WR 10 15 AOUT/INT count. SCLK/CTS/CS 11 14 C1A RESET 12 13 C2A System Block Diagram Si3018/10 QE 1 16 DCT2 DCT 2 15 IGND RX 3 14 DCT3 CHPosUt Host Interface SSyi2s4texmx SLi3in0e1 8 GDloAbAa l Telco TRiipng C1IBB 54 1123 QQBE2 Side Side BOM C2B 6 11 SC VREG 7 10 VREG2 UART RNG1 8 9 RNG2 SPI Capacitive Parallel Isolation Barrier Rev. 1.3 12/10 Copyright © 2010 by Silicon Laboratories Si2457/34/15/04

Si2457/34/15/04 2 Rev. 1.3

Si2457/34/15/04 TABLE OF CONTENTS Section Page 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. Bill of Materials: Si2457/34/15/04 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1. Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.2. Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.3. Data Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.4. Fast Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.5. V.80 Synchronous Access Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.6. Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7. Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.8. Data Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.9. Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.10. Wire Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.11. Caller ID Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.12. Parallel Phone Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.13. Overcurrent Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.14. Global Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.15. Firmware Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.16. DTMF Detection / Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.17. SMS/MMS Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.18. Codec Interface (24-Pin Version Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.19. EEPROM Interface (24-Pin Version Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.20. AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.21. Extended AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5. S-Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6. User-Access Registers (U-Registers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7. Pin Descriptions: Si2457/34/15/04 (16-Pin Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8. Pin Descriptions: Si2457/34/15/04 (24-Pin Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 9. Pin Descriptions: Si3018/10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 10. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 11. Package Markings (Top Markings) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 11.1. Si2457-D-FT Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 11.2. Si2457-D-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 11.3. Si2434-D-FT Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 11.4. Si2434-D-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 11.5. Si2415-D-FT Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 11.6. Si2415-D-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 11.7. Si2404-D-FT Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 11.8. Si2404-D-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11.9. Si3010-F-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11.10. Si3018-F-FS Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 12. Package Outline: 24-Pin TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 13. 24-Pin TSSOP Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 14. Package Outline: 16-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 15. 16-Pin SOIC Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Rev. 1.3 3

Si2457/34/15/04 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter1 Symbol Test Condition Min2 Typ Max2 Unit F-grade 0 25 70 Ambient Temperature T °C A G-grade –40 25 85 Si2457/34/15/04 Supply Voltage, V 3.0 3.3 3.6 V D Digital3 Notes: 1. The Si2457/34/15/04 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2457/34/15/04 and any Si3018 are used. See "2. Typical Application Schematic" on page 11. 2. All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions. Typical values apply at nominal supply voltages and an operating temperature of 25°C unless otherwise stated. 3. The digital supply, VD, operates from 3.0 to 3.6V. Table 2. Loop Characteristics (V =3.0 to 3.6V, T =0 to 70°C for F-grade, T =–40 to 85°C for G-grade) D A A Parameter Symbol Test Condition Min Typ Max Unit DC Termination Voltage V I =20mA, ILIM1=0 — — 6.0 V TR L DCV=00, MINI=11, DCR = 0 DC Termination Voltage V I =120mA, ILIM=0 9 — — V TR L DCV=00, MINI=11, DCR = 0 DC Termination Voltage V I =20mA, ILIM=0 — — 7.5 V TR L DCV=11, MINI=00, DCR = 0 DC Termination Voltage V I =120mA, ILIM=0 9 — — V TR L DCV=11, MINI=00, DCR = 0 DC Termination Voltage V I =20mA, ILIM=1 — — 7.5 V TR L DCV=11, MINI=00, DCR = 0 DC Termination Voltage V I =60mA, ILIM=1 40 — — V TR L DCV=11, MINI=00, DCR = 0 DC Termination Voltage V I =50mA, ILIM=1 — — 40 V TR L DCV=11, MINI=00, DCR = 0 On-Hook Leakage Current I V =–48V — — 5 µA LK TR Operating Loop Current I MINI=00, ILIM=0 10 — 120 mA LP Operating Loop Current I MINI=00, ILIM=1 10 — 60 mA LP DC Ring Current DC current flowing through ring — 1.5 3 µA detection circuitry Ring Detect Voltage2 V RT=0 12 15 18 V RD RMS Ring Detect Voltage2 V RT=1 18 21 25 V RD RMS Ring Frequency F 15 — 68 Hz R Ringer Equivalence Number REN — — 0.2 Notes: 1. ILIM=U67, bit 9; DCV=U67, bits 3:2; MINI=U67, bits 13:12; DCR=U67, bit 7; RT=U67, bit 0. 2. The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected above the maximum. 4 Rev. 1.3

Si2457/34/15/04 TIP + 600  Si3018 V I TR L 10 µF – RING Figure 1. Test Circuit for Loop Characteristics Table 3. DC Characteristics, V = 3.0 to 3.6V D (V =3.0 to 3.6V, T =0 to 70°C for F-grade, T =–40 to 85°C for G-grade) D A A Parameter Symbol Test Condition Min Typ Max Unit High Level Input Voltage V 2.0 — — V IH Low Level Input Voltage V — — 0.8 V IL High Level Output Voltage V I =–2mA 2.4 — — V OH O Low Level Output Voltage V I =2mA — — 0.35 V OL O Input Leakage Current I –10 — 10 µA L Pullup Resistance Pins R 50 125 200 k PU Total Supply Current* I — 17 35 mA D Total Supply Current, Wake on Ring* I — 4.4 — mA D Total Supply Current, Powerdown* I PDN=1 — 80 — µA D *Note: All inputs at 0 or V . All inputs held static except clock and all outputs unloaded (Static I =0mA). D OUT Rev. 1.3 5

Si2457/34/15/04 Table 4. AC Characteristics (V =3.0 to 3.6V, TA=0 to 70°C for F-grade, Fs=8kHz, T =–40 to 85°C for G-grade) D A Parameter Symbol Test Condition Min Typ Max Unit Sample Rate Fs — 8 — kHz Clock Input Frequency F default — 4.9152 — MHz XTL Clock Input Frequency F 27MHz Mode1 — 27 — MHz XTL Clock Input Frequency F 32kHz Mode1 — 32.768 — kHz XTL Receive Frequency Response Low –3dBFS Corner, FILT=0 — 5 — Hz Receive Frequency Response Low –3 dBFS Corner, FILT=1 — 200 — Hz Transmit Full Scale Level2 V — 1.1 — V FS PEAK Receive Full Scale Level2,3 V — 1.1 — V FS PEAK DR ILIM=0, DCV=11, MINI=00 — 80 — dB Dynamic Range4 DCR=0, I =100mA L DR ILIM=0, DCV=00, MINI=11 — 80 — dB Dynamic Range4 DCR=0, I =20mA L DR ILIM=1, DCV=11, MINI=00 — 80 — dB Dynamic Range4 DCR=0, I =50mA L Transmit Total Harmonic Distor- THD ILIM=0, DCV=11, MINI=00 — –72 — dB tion5 DCR=0, I =100mA L Transmit Total Harmonic Distor- THD ILIM=0, DCV=00, MINI=11 — –78 — dB tion5 DCR=0, I =20mA L Receive Total Harmonic Distor- THD ILIM=0, DCV=00, MINI=11 — –78 — dB tion5 DCR=0, I =20mA L Receive Total Harmonic Distor- THD ILIM=1,DCV=11, MINI=00 — –78 — dB tion5 DCR=0, I =50mA L Dynamic Range (Caller ID Mode) DR VIN=1kHz, –13dBm — 50 — dB CID Notes: 1. Refer to “AN93: ISOmodem® Chipset Family Designer's Guide” for configuring clock input reset strapping. 2. Measured at TIP and RING with 600termination at 1kHz, as shown in Figure1 on page 5. 3. Receive full scale level produces –0.9dBFS at DTX. 4. DR=20xlog |Vin| + 20xlog (rms signal/rms noise). Applies to both transmit and receive paths. Vin=1kHz, –3dBFS. 5. Vin=1kHz, –3dBFS. THD=20xlog (rms distortion/rms signal). 6 Rev. 1.3

Si2457/34/15/04 Table 5. Absolute Maximum Ratings Parameter Symbol Value Unit DC Supply Voltage V 4.1 V D Input Current, Si2457/34/15/04 Digital I ±10 mA IN Input Pins Digital Input Voltage V –0.3 to (V + 0.3) V IND D CLKIN/XTALI Input Voltage V –0.3 to (V + 0.3) V XIND D Operating Temperature Range T –10 to 100 °C A Storage Temperature Range T –40 to 150 °C STG Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded. Functional operation should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 6. Switching Characteristics1 (V =3.0 to 3.6V, T =0 to 70°C for F-grade, T =–40 to 85°C for G-grade) D A A Parameter Symbol Min Typ Max Unit UART Timing Parameters Baud Rate Accuracy t –1 — 1 % BD Reset Timing Parameters RESET to RESET t 5.02 — — ms RS RESET to 1st AT Command t 300 — — ms AT Parallel Timing Parameters Address Setup t 15 — — ns AS Address Hold t 0 — — ns AH WR Low Pulse Width t 50 — — ns WL Write Data Setup Time t 20 — — ns WDSU Write Cycle Time t 120 — — ns WC Chip Select Setup t 10 — — ns CSS Chip Select Hold t 0 — — ns CSH RD Low Pulse Width t 50 — — ns RL RD Low to Data Driven Time t — — 20 ns RLDD Data Hold t 10 — — ns DH RD High to Hi-Z Time t — — 30 ns DZ Notes: 1. All timing is referenced to the 50% level of the waveform. Input test levels are V =V – 0.4V, V =0.4V. IH D IL 2. With 32.768kHz clocking, allow 500ms for the reset low-to-high minimum pulse on power-up and wake-from-power- down conditions. Rev. 1.3 7

Si2457/34/15/04 Table 6. Switching Characteristics1 (Continued) (V =3.0 to 3.6V, T =0 to 70°C for F-grade, T =–40 to 85°C for G-grade) D A A Parameter Symbol Min Typ Max Unit Read Cycle Time t 120 — — ns RC Write to Read Cycle Time t 120 — — ns WRC Serial Peripheral Interface (SPI) Timing Parameters SS Falling to First SCLK Edge t 41 — — ns SE Last SCLK Edge to SS Rising t 41 — — ns SD SS Rising to MISO High-Z t — — 93 ns SDZ SCLK High Time t 102 — — ns CKH SCLK Low Time t 102 — — ns CKL MOSI Valid to SCLK Sample Edge t 41 — — ns SIS SCLK Sample Edge to MOSI Change t 41 — — ns SIH SCLK Shift Edge to MISO Change t — — 93 ns SOH SCLK cycle time t 224 — — ns SCK Inactive time between SS actives t 81 — — ns NSS_INACT Notes: 1. All timing is referenced to the 50% level of the waveform. Input test levels are V =V – 0.4V, V =0.4V. IH D IL 2. With 32.768kHz clocking, allow 500ms for the reset low-to-high minimum pulse on power-up and wake-from-power- down conditions. SS T T T SE CKL SD SCLK* T CKH T T SIS SIH MOSI T T T SEZ SOH SDZ MISO Figure 2. SPI Slave Timing 8 Rev. 1.3

Si2457/34/15/04 t t CSS CSH CS tAS tAH A0 ADDRESS = 0 or 1 t t RL RC RD t DZ t t RLDD DH D[7:0] VALID DATA VALID DATA t RLDD Figure 3. Parallel Interface Read Timing t t CSS CSH CS tAS tAH A0 ADDRESS = 0 or 1 t t WL WC WR t WDSU t DH D[7:0] VALID DATA VALID DATA Figure 4. Parallel Interface Write Timing Rev. 1.3 9

Si2457/34/15/04 CS A0 ADDRESS = 0 or 1 WR t WRC RD t t WDSU DH D[7:0] VALID DATA VALID DATA t RLDD Figure 5. Parallel Interface Write Followed by Read Timing 10 Rev. 1.3

Si2457/34/15/04 2. Typical Application Schematic Refer to AN93 Appendix A for layout guidelines.Please submit layout to Silicon Labs for reviewprior to PCB fabrication. Emissions option R16RINGFB2 RV1 TIPFB1R15 C9C8 Option - e d C3 i S D1 + m- R6 e t s y S C10 n Q3 pi Q2 - 6 1 h Q1 R3 Z1 wit c i R5 R8 R7 at m R4 e C7 R10 Q4 ch R11 S 4 R2 /0 C4 + R1 Q5 /15 4 3 3 2 14 16 13 12 1 9 8 7/ U2 RX DCT DCT3 C1B C2B DCT2 QB QE2 QE IB VREGRNG2VREG2 RNG1DNCGSI 5111 Si245 5 6 4 7 10 C6 al c i p C1 C2 C5 y T R9 . 6 VDD C50 External crystal option4U1 DC40Y1V11CLKIN/XTALI C412XTALO2 R1210C1A R13DN9AC2AGV 2311 C51 Figure RTSDCDESCINTGPIO RXDTXDCTS RESET 161514113 567 8 RTS_DCD_ESCINT_GPIO RXDTXDCTS_ RESET_ Rev. 1.3 11

Si2457/34/15/04 Refer to AN93 Appendix A for layout guidelines.Please submit layout to Silicon Labs for reviewprior to PCB fabrication. Emissions option R16RINGFB2 RV1 TIPFB1R15 C9C8 tion p - O C3 e d D1 + Si R6 m- e t s y C10 S Q3 n Q2 pi - 4 2 R3 Z1 h Q1 it w c R5 R8 R7 i t a R4 m C7 R10 Q4 he c R11 S 4 R2 0 + Q5 5/ C4 R1 1 / 4 3 2 14 16 13 12 1 9 8 /3 U2 RX DCT DCT3 C1B C2B DCT2 QB QE2 QE IB VREGRNG2VREG2 RNG1DNCGSI 5111 Si2457 5 6 4 7 10 C6 l a c i C1 C2 C5 yp T R9 . 7 VDD C50 External crystal option4U1 DC40Y1V11CLKIN/XTALI C412XTALO2 R1210C1A R13DN9AC2AGV 2311 C51 Figure RTSDCDESCINTGPIO RXDTXDCTS RESET 161514113 567 8 RTS_DCD_ESCINT_GPIO RXDTXDCTS_ RESET_ 12 Rev. 1.3

Si2457/34/15/04 3. Bill of Materials: Si2457/34/15/04 Chipset Component Value Supplier(s) C1, C2 33pF, Y2, X7R, ±20% Panasonic, Murata, Vishay C3 10nF, 250V, X7R, ±20% Venkel, SMEC C4 1.0µF, 50V, Elec/Tant, ±20% Panasonic C5, C6, C50, C521 0.1µF, 16V, X7R, ±20% Venkel, SMEC C7 2.7nF, 50V, X7R, ±20% Venkel, SMEC C8, C9 680pF, Y2, X7R, ±10% Panasonic, Murata, Vishay C10 0.01µF, 16V, X7R, ±20% Venkel, SMEC 32.768kHz: 18pF, 16V, NPO, ±5% C40 Venkel, SMEC 4.9152MHz: 33pF, 16V, NPO, ±5% C41 27MHz: Not Populated C51, C531 0.22µF, 16V, X7R, ±20% Venkel, SMEC D1, D22 Dual Diode, 225mA, 300V, CMPD2004S Central Semiconductor FB1, FB2 Ferrite Bead, BLM21AG601SN1 Murata Q1, Q3 NPN, 300V, MMBTA42 OnSemi, Fairchild Q2 PNP, 300V, MMBTA92 OnSemi, Fairchild Q4, Q5 NPN, 80V, 330mW, MMBTA06 OnSemi, Fairchild RV1 Sidactor, 275V, 100A Teccor, Protek, ST Micro R1 1.07k, 1/2W, 1% Venkel, SMEC, Panasonic R2 150, 1/16W, 5% Venkel, SMEC, Panasonic R3 3.65k, 1/2W, 1% Venkel, SMEC, Panasonic R4 2.49k, 1/2W, 1% Venkel, SMEC, Panasonic R5, R6 100k, 1/16W, 5% Venkel, SMEC, Panasonic R7, R8 20M, 1/16W, 5% Venkel, SMEC, Panasonic R9 1M, 1/16W, 1% Venkel, SMEC, Panasonic R10 536, 1/4W, 1% Venkel, SMEC, Panasonic R11 73.2, 1/2W, 1% Venkel, SMEC, Panasonic R12, R13 56, 1/16W, 1% Venkel, SMEC, Panasonic R15, R163 0, 1/16W Venkel, SMEC, Panasonic U1 Si2457/34/15/04 Silicon Labs U2 Si3018/10 Silicon Labs 32.768kHz, 12pF, 100ppm, 35k max ESR ECS Inc., Siward Y14 4.9152MHz, 20pF, 100ppm, 150 ESR 27MHz (from external clock) Z1 Zener Diode, 43V, 1/2W, BZT84C43 On Semi Notes: 1. C52 and C53 should not be populated with the Si2457/34/15/04 16-pin package option. 2. Several diode bridge configurations are acceptable. For example, a single DF04S or four 1N4004 diodes may be used. 3. Murata BLM21AG601SN1 may be substituted for R15–R16 (0) to decrease emissions. 4. To ensure compliance with ITU specifications, frequency tolerance must be less than 100ppm including initial accuracy, 5-year aging, 0 to 70°C, and capacitive loading. Rev. 1.3 13

Si2457/34/15/04 Table 7. Protocol Characteristics Item Specification Data Rate 56kbps1 ITU-T V.901 54.666kbps1 ITU-T V.901 53.333kbps1 ITU-T V.901 52kbps1 ITU-T V.901 50.666kbps1 ITU-T V.901 49.333kbps1 ITU-T V.901 48kbps1 ITU-T V.901 46.666kbps1 ITU-T V.901 45.333kbps1 ITU-T V.901 44kbps1 ITU-T V.901 42.666kbps1 ITU-T V.901 41.333kbps1 ITU-T V.901 40kbps1 ITU-T V.901 38.666kbps1 ITU-T V.901 37.333kbps1 ITU-T V.901 36kbps1 ITU-T V.901 34.666kbps1 ITU-T V.901 33.333kbps1 ITU-T V.901 32kbps1 ITU-T V.901 30.666kbps1 ITU-T V.901 29.333kbps1 ITU-T V.901 28kbps1 ITU-T V.901 33.6kbps2 ITU-T V.342 31.2kbps2 ITU-T V.342 28.8kbps2 ITU-T V.342 26.4kbps2 ITU-T V.342 24.0kbps2 ITU-T V.342 21.6kbps2 ITU-T V.342 19.2kbps2 ITU-T V.342 16.8kbps2 ITU-T V.342 14.4kbps3 ITU-T V.34 or V.32bis3 12.0kbps3 ITU-T V.34 or V.32bis3 9600bps3 ITU-T V.34, V.32bis, or V.293 7200bps3 ITU-T V.34 or V.32bis3 4800bps3 ITU-T V.34 or V.32bis3 2400bps ITU-T V.34 or V.22bis3 1200bps ITU-T V.22bis, V.23, or Bell 212A 300bps ITU-T V.21 300bps Bell 103 Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. 14 Rev. 1.3

Si2457/34/15/04 Table 7. Protocol Characteristics (Continued) Item Specification Data Format Bit asynchronous Selectable 8, 9, 10, or 11 bits per character, which includes the start, stop, and parity bits Compatibility ITU-T V.901, V.342, V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 Operating Mode Switched network Two-wire full duplex Data Modulation 28 to 56kbps1 V.90 as specified by ITU-T 2.4 to 33.6kbps2 V.34 as specified by ITU-T 14.4kbps3 128-level TCM/2400 Baud ±0.01% 12.0kbps3 64-level TCM/2400 Baud ±0.01% 9600bps3 32-level TCM/2400 Baud ±0.01% 9600bps3 16-level QAM/2400 Baud ±0.01% 9600bps3 V.29 QAM as specified by ITU-T 7200bps3 16-level TCM/2400 Baud ±0.01% 4800bps3 4-level QAM/2400 Baud ±0.01% 2400bps 16-level QAM/600 Baud ±0.01% 1200bps 4-level PSK/600 Baud ±0.01% 300bps FSK 300 Baud ±0.01% Answer Tone ITU-T V.32bis, V.32, V.22bis, V.22, and V.21 2100Hz ±3Hz modes Bell 212A and 103 modes 2225Hz ±3Hz Transmit Carrier V.901 As specified by ITU-T V.342 As specified by ITU-T ITU-T V.32bis3 1800Hz ±0.01% ITU-T V.323 1800Hz ±0.01% ITU-T V.293 1700Hz±1Hz ITU-T V.22, V.22bis/Bell 212A 1200Hz ±0.5Hz Originate mode 2400Hz ±1Hz Answer mode ITU-T V.21 Mark (980Hz ±12Hz) Space (1180Hz ±12Hz) Originate mode Mark (1650Hz ±12Hz) Space (1850Hz ±12Hz) Answer mode Bell 103 Mark (1270Hz ±12Hz) Space (1070Hz ±12Hz) Originate mode Mark (2225Hz ±12Hz) Space (2025Hz ±12Hz) Answer mode Output Level Permissive—Switched network –9dBm maximum Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Rev. 1.3 15

Si2457/34/15/04 Table 7. Protocol Characteristics (Continued) Item Specification Receive Carrier ITU-T V.901 As specified by ITU-T ITU-T V.342 As specified by ITU-T ITU-T V.32bis3 1800Hz ±7Hz ITU-T V.323 1800Hz ±7Hz ITU-T V.293 1700Hz ±7Hz ITU-T V.22, V.22bis/Bell 212A 2400Hz ±7Hz Originate mode 1200Hz ±7Hz Answer mode ITU-T V.21 Mark (980Hz ±12Hz) Space (1180Hz ±12Hz) Originate mode Mark (1650Hz ±12Hz) Space (1850Hz ±12Hz) Answer mode Bell 103 Mark (2225Hz ±12Hz) Space (2025Hz ±12Hz) Originate mode Mark (1270Hz ±12Hz) Space (1070Hz ±12Hz) Answer mode Carrier Detect (level for ITU-T V.22bis, V.22, V.21, Acquisition (–43dBm) 212, 103) in Switched Network Release (–48dBm) Hysteresis 2dBm minimum 1 2 3 Note: ITU-T V.90 , V.34 , V.32/V.32bis are echo canceling protocols that use signal quality as criteria for maintaining connection. They also provide for self-training detection to force disconnect. DTE Interface EIA/TIA-232-E (ITU-T V.24/V.28/ISO 2110) Line Equalization Automatic Adaptive Connection Options Loss of Carrier in ITU-T V.22bis and lower Phone Types 500 (rotary dial), 2500 (DTMF dial) Dialing Pulse and Tone DTMF Output Level Per TIA-968-B Pulse Dial Ratio Make/Break: 39/61% Ring Cadence Per T1.401.02-2000 Call Progress Monitor BUSY CONNECT (rate) NO ANSWER NO CARRIER NO DIALTONE OK RING RINGING Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. 16 Rev. 1.3

Si2457/34/15/04 4. Functional Description This device is ideal for embedded modem applications due to its small board space, low power consumption, and global compliance. The Si2457/34/15/04 solution includes a silicon DAA using Silicon Laboratories’ XTI XTO proprietary third-generation DAA technology. This highly- CLKOUT PLL Clocking integrated DAA can be programmed to meet worldwide EESD EEPROM EECLK Interface Data Bus PTT specifications for ac termination, dc termination, EECS RXD ringer impedance, and ringer threshold. In addition, the TXD DECRCSTTRDCSSI InUteArRfaTc e Controller DSP IntDeArfaAce CC12 Si3018/10 TLion ePhone Sstir2in4g5e7n/3t 4w/1o5rl/d0w4i dhea sre qbueierenm deenstisg nfoerd o utot- omf-ebeatn dth een merogsyt, billing-tone immunity, surge immunity, and safety AOUT CS requirements. WR RD Parallel ROM A0 Interface The Si2457/34/15/04 allows for rapid integration into D0-D7 RAM existing modem applications by providing a serial Program Bus MISO interface that can directly communicate to either a MOSI SPI SCLK Interface microcontroller via a UART interface or a PC via an RS- SS 232 port. This interface allows for PC evaluation of the INT RESET modem immediately upon powerup via the AT commands using standard terminal software. Figure 8. Functional Block Diagram 4.1. Host Interface The Si2457/34/15/04 ISOmodem® is a complete embedded modem chipset with integrated direct access The Si2457/34/15/04 interfaces to the host processor arrangement (DAA) that provides a programmable line through either an asynchronous serial interface, a interface to meet global telephone line requirements. synchronous Serial Peripheral Interface (SPI), or a Available in two small packages, this solution includes a parallel interface. The default is asynchronous serial DSP data pump, modem controller, on-chip RAM and communication. Selection of either SPI or parallel ROM, codec, DAA, analog output, and 27MHz clock interface is done on power-up with reset strapping. input. Please refer to “AN93: ISOmodem® Chipset Family Designer's Guide” for details. The Si2457/34/15/04 accepts standard modem AT commands and provides connect rates up to 56/33.6/ 4.1.1. Asynchronous Serial Interface 14.4/2.4kbps full-duplex over the Public Switched The Si2457/34/15/04 supports asynchronous serial Telephone Network (PSTN). The Si2457/34/15/04 communication with data terminal equipment (DTE) at features a complete set of modem protocols including all rates up to 307.2kbps with the standard serial UART ITU-T standard formats up to V.90. format. Upon powerup, the UART baud rate is To provide the most flexibility, the Si2457/34/15/04 automatically detected using the autobaud feature. ISOmodem system-side device is offered in either a 24- 4.1.2. Serial Peripheral Interface (SPI) pin TSSOP or a 16-pin SOIC package. The 16-pin The serial peripheral interface (SPI) provides a flexible, version is footprint-compatible with the Si2401 full-duplex synchronous serial bus for host processor ISOmodem and is recommended for most applications. and Si2457/34/15/04 ISOmodem communication. When The 16-pin version does not support the parallel, the Si2457/34/15/04 is powered up with SPI mode EEPROM or voice codec interface. If these features are enabled the modem becomes an SPI slave, and the required, customers should use the 24-pin version. pins are configured to SS (slave select input, active The ISOmodem provides numerous additional features low), MOSI (serial data input to modem), MISO (serial for embedded modem applications. The modem includes data output from modem) and SCLK (serial data clock full type I and type II caller ID detection and decoding for input). Each SPI operation consists of a control-and- global standards. Call progress monitoring is supported address byte and a data byte. through standard result codes. The modem is also 4.1.3. Parallel Interface (24-Pin Version Only) programmable to meet global settings. Because the The Si2457/34/15/04 can also communicate via a Si2457/34/15/04 ISOmodem integrates the DAA, analog parallel interface when using the 24-pin version. The features, such as parallel phone detect, overcurrent parallel interface is an 8-bit data bus with a single bit detection, and global PTT compliance with a single address to memory mapped registers. design, are included. Rev. 1.3 17

Si2457/34/15/04 4.2. Command Mode 4.7. Low-Power Modes Upon reset, the ISOmodem® is in command mode and The Si2457/34/15/04 provides multiple low power accepts “AT” commands. An outgoing modem call can modes. Using the S24 S-register, the Si2457/34/15/04 be made using the “ATDT#” (tone dial) or “ATDP#” can be set to automatically enter sleep mode after a (pulse dial) command after the device is configured. If pre-programmed time of inactivity with either the DTE or the handshake is successful, the modem responds with the remote modem. The sleep mode is entered after the response codes detailed in Table12 on page38 and (S24) seconds have passed since the last DTE activity, enters data mode. after the transmit FIFO is empty, and after the last data 4.3. Data Mode are received from the remote modem. Additionally, the Si2457/34/15/04 can be placed in The Si2457/34/15/04 ISOmodem is in data mode while wake-on-ring-mode using the command, AT&Z. In either it has a telephone line connection to another modem or mode, the ISOmodem remains in the sleep state until is in the process of establishing a connection. one of the following occurs: Data protocols are available to provide error correction to improve reliability (V.42 and MNP2-4) and data  A 1-to-0 transition on TXD (UART mode). compression to increase throughput (V.44, V.42bis and  A 1-to-0 transition on SS (SPI mode). MNP5).  A 1-to-0 transition on CS (parallel mode). Each connection between two modems in data mode  An incoming ring is detected. begins with a handshaking sequence. During this  A parallel telephone is picked up. sequence, the modems determine the line speed, data  Line polarity reversal protocol, and related parameters for the data link. The Si2457/34/15/04 may also be placed in a complete Configuration through AT commands determines the powerdown mode. Once the Si2457/34/15/04 range of choices available to the modem during the completely powers down, it can only be powered back negotiation process. on via the RESET pin. 4.4. Fast Connect 4.8. Data Compression The Si2457/34/15/04 supports a fast connect mode of operation to reduce the time of a connect sequence in The modem can achieve DTE (host-to-ISOmodem) originate mode. The Fast Connect modes can be speeds greater than the maximum DCE (modem-to- enabled for V.21, V.22, Bell103, and V.29 modulations. modem) speed through the use of a data compression See AN93 for details. protocol. The compression protocols available are the ITU-T V.42bis and MNP5 protocols. Data compression 4.5. V.80 Synchronous Access Mode attempts to increase throughput by compressing the The Si2457/34/15/04 supports a V.80 synchronous data before actually sending it. Thus, the modem is able access mode of operation, which operates with an to transmit more data in a given period of time. asynchronous DTE and a synchronous DCE. See 4.9. Error Correction “AN93: ISOmodem® Chipset Family Designer's Guide”. The Si2457/34/15/04 ISOmodem can employ error 4.6. Clocking correction (reliable) protocols to ensure error-free The Si2457/34/15/04 contains an on-chip phase-locked delivery of asynchronous data sent between the host loop (PLL) and clock generator to derive all necessary and the remote end. The Si2457/34/15/04 supports V.42 internal system clocks from a single clock input. A and MNP2-4 error correction protocols. V.42 (LAPM) is 32.768kHz or 4.9152MHz crystal can be used across most commonly used and is enabled by default. XTALI and XTALO pins to form the master clock 4.10. Wire Mode (±100ppm max, ±25ppm recommended) for the ISOmodem. The 32.768kHz option can provide lower Wire mode is used to communicate with standard non- BOM costs and smaller footprint. Alternatively, a clock error correcting modems. When optioned with \N3, the input of 27MHz, 4.9152MHz, or 32.768kHz can be Si2457/34/15/04 falls back to wire mode if it fails in an provided to XTALI if that clock source is available in the attempt to negotiate a V.42 link with the remote modem. system. A 4.9152MHz clock input is the default clock Error correction and data compression are not active in option. Other clock options are selected at power-up wire mode. through reset strapping. Refer to AN93 for details. 18 Rev. 1.3

Si2457/34/15/04 4.11. Caller ID Operation The LVS bits have a resolution of 1 V per bit with an accuracy of approximately ±10%. Bits 0 through 6 of The Si2457/34/15/04 supports full type I and type II this 8-bit signed twos complement number indicate the caller ID detection and decode. Caller ID is supported value of the line voltage, and the sign bit (bit 7) indicates for the US Bellcore, European ETSI, UK, and Japanese the polarity of TIP and RING. The ISOmodem can also protocols and is enabled via the +VCID, +VCDT, and monitor the TIP-RING dc voltage using the LVCS +PCW commands. register (U79, bits 4:0). See Figure9 on page 19. See 4.12. Parallel Phone Detection also the %Vn commands for automatic line-in-use detection. The ISOmodem® is able to detect when another telephone, modem, or other device is using the phone 4.12.2. Off-Hook Intrusion Detection line. This allows the host to avoid interrupting another When the ISOmodem is off-hook, an algorithm is phone call when the phone line is already in use and to implemented in the ISOmodem to automatically monitor intelligently handle an interruption when the ISOmodem the TIP-RING loop current via the LVCS register. During is using the phone line. the off-hook state, the LVCS register switches from representing the TIP-RING voltage to representing the 4.12.1. On-Hook Line-in-use Detection TIP-RING current. See Figure10 on page 20. Upon When the ISOmodem is sharing the telephone line with detecting an intrusion, the ISOmodem alerts the host of other devices, it is important that it not interrupt a call in the condition via the INT pin. progress. To detect whether another device is using the shared telephone line, the host can use the ISOmodem to monitor the TIP-RING dc voltage with the line voltage sense (LVS) register (U6C, bits 15:8). 30 25 20 LVCS BITS 15 10 5 0 0 3 6 9 121518 21242830 333639 42454751 5457 606366697275 78818487 100 Loop Voltage (V) Figure 9. Loop Voltage Rev. 1.3 19

Si2457/34/15/04 Overload 30 25 20 CTR21 only LVCS BITS 15 10 5 0 0 3 6 9 12151821242730333639424548515457606366697275788184879093 140 Loop Current (mA) Figure 10. Loop Current 20 Rev. 1.3

Si2457/34/15/04 4.13. Overcurrent Detection 4.17. SMS/MMS Support The Si2457/34/15/04 includes an overcurrent detection Short Message Service (SMS) is a service that allows feature that measures the loop current at a text messages to be sent and received from one programmable time after the Si2457/34/15/04 goes off- telephone to another via an SMS service center. hook. This allows the Si2457/34/15/04 to detect if it is Multimedia Messaging Service (MMS) extends the core connected to an improper telephone line. The SMS capability to send messages that include overcurrent detection feature may be enabled by setting multimedia content. The Fax ISOmodem provides an the OCDM bit (U70, bit 11). OHT (U77, bits 8:0) sets the interface that offers a great deal of flexibility in handling delay after off-hook until the loop current is measured. multiple SMS standards. This flexibility is possible See “AN93: ISOmodem® Chipset Family Designer's because most of the differences between standards are Guide” for details. handled by the host using the raw data itself. The Si2457/34/15/04 performs the necessary modulation/ 4.14. Global Operation demodulation of the data and provides two options for The Si2457/34/15/04 chipset contains an integrated message packet structure (Protocol 1 and Protocol 2, as silicon direct access arrangement (Silicon DAA) that defined in ETSI ES 201 912). The rest of the data link provides a programmable line interface to meet layer and transfer layer are defined by the host system. international telephone line interface requirements. The content of the message is entirely up to the host “AN93: Modem Designer’s Guide” gives the DAA including any checksum or CRC. ETSI ES 201 912 register settings required to meet international PTT describes two standard data and transfer layers that are standards. commonly used. SMS typically relies on caller Additionally, the user-access registers (via the AT:U and identification information to determine if the call should AT:R commands) may be programmed for country- be answered using an SMS device or not. specific settings, such as dial tone, ring, ringback, and See “6.4. SMS Support” in AN93 for more information busy tone. See AN93 for complete details. on how to configure the modem for SMS support. 4.15. Firmware Upgrades 4.18. Codec Interface (24-Pin Version Only) The Si2457/34/15/04 contains an on-chip program ROM In order to support a full range of voice and data that includes the firmware required for the features applications, the Si2457/34/15/04 includes an optional listed in this data sheet. In addition, the Si2457/34/15/04 serial interface that connects to an external voice codec contains on-chip program RAM to accommodate minor (Si3000). See AN93 for complete details. changes to the ROM firmware. This allows Silicon Labs 4.19. EEPROM Interface to provide future firmware updates to optimize the (24-Pin Version Only) characteristics of new modem designs and those already deployed in the field. See AN93 for complete The Si2457/34/15/04 supports an optional serial details. peripheral interface (SPI) bus serial EEPROM Mode 3 4.16. DTMF Detection / Generation with a 16-bit (8–64kbit range) address. Upon powerup, if a pulldown resistor 10k is placed between D6 and The Si2457/34/15/04 provides comprehensive DTMF GND, the ISOmodem attempts to detect an EEPROM. tone generation and detection. The ISOmodem can The EEPROM is intended first for setting custom generate single tones or DTMF tones using the +VTS defaults, second for automatically loading firmware command. DTMF tones may also be generated during upgrades, and third to allow for user-defined AT dialing using the “ATDT” command. DTMF detection is command macros for use in custom AT commands or only available in voice mode (+FCLASS=8). DTMF country codes. See AN93 for complete details. digits are reported from the modem to the host using <DLE> shielding. 4.20. AT Commands At powerup, the Si2457/34/15/04 is in the AT command mode. In command mode, the modem monitors the input (serial or parallel) checking constantly for a valid command (AT commands are described in Table8.) Rev. 1.3 21

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) Command Action $ Display AT command mode settings. A Answer incoming call Re-execute last command. This is the only command not preceded by “AT” or followed by a A/ <CR>. Dial The dial command, followed by 1 or more dial command modifiers, manually dials a phone number: Modifier Function ! or & Flash hook switch for FHT (U4F) ms (default: 500ms) Pause before continuing for S8 seconds (default: , or < 2seconds) ; Return to AT command mode @ Wait for silence. Polarity reversal detect. By placing the “G” character in the dial string (i.e. ATDTG1), the Si2457/34/15/04 will monitor the telephone line for polarity reversals. If a busy tone is detected, the Si2457/34/15/04 will report “POLARITY REVERSAL” if a polarity reversal was detected or “NO POLARITY REVERSAL” if a polarity reversal was not detected. In each case, the result G code is followed by “OK”. If the S7 timeout occurs Dn before a busy tone is detected, the Si2457/34/15/04 will report “NO CARRIER”. Polarity reversal monitoring begins after the last digit is dialed and ends when the busy tone is detected or S7 timeout occurs. Note: It is not possible to establish a modem connection when using this command. L Redial last number. Pulse (rotary) dialing—pulse digits: 0, 1, 2, 3, 4, 5, 6, 7, P 8, 9 Tone (DTMF) dialing—DTMF digits: *, #, A, B, C, D, 0, T 1, 2, 3, 4, 5, 6, 7, 8, 9. Wait for dial tone before continuing for S14 seconds (default: 12seconds). Blind dialing modes X0, X1 and X3 do not affect the W command. W If the DOP bit (U7A, bit 7) is set, the “ATDTW” com- mand will cause the ISOmodem® to pause dialing and either report an “OK” if a dialtone is detected or “NO DIALTONE” if a dial tone is not detected. En Local DTE echo E0 Disable E1 Enable Hn Hook switch. 22 Rev. 1.3

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action H0 Go on-hook (hang up modem). H1 Go off-hook. In Identification and checksum. Display Si2457/34/15/04 revision code. I0 B: Revision B C: Revision C, etc. I1 Display Si2457/34/15/04 firmware revision code (numeric). Display line-side revision code. I3 18C = Si3018 revision C Display the ISOmodem® model number. “2404”=Si2404 I6 “2415”=Si2415 “2434”=Si2434 “2457”=Si2457 I7 Diagnostic results 1. See “AN93: ISOModem® Chipset Family Designer’s Guide” for details. I8 Diagnostic results 2. See AN93 for details. Ln Speaker volume operation L1 Low speaker volume L2 Medium speaker volume L3 High speaker volume Mn Speaker operation (via AOUT). M0 Speaker is always off. M1 Speaker is on while dialing and handshaking; off in data mode. M2 Speaker is always on. M3 Speaker is off while dialing, on during handshaking and retraining. On Return to data mode from Command mode operation. O0 Return to data mode. O1 Return to data mode and perform a full retrain (at any speed except 300 bps). O2 Return to data mode and perform rate renegotiation. Qn Response mode. Q0 Enable result codes (see Table12 on page38) Q1 Disable result codes (enable quiet mode). R Initiate V.23 reversal. Sn S-register operation (see Table13 on page41). S$ List contents of all S registers. Sn? Display contents of S-register n. Rev. 1.3 23

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action Sn=x Set S-register n to value x (where n and x are decimal values). Vn Result code type (see Table12 on page38). V0 Numeric result codes. V1 Verbal result codes Call Progress Monitor (CPM)—This command controls which CPM signals are monitored Xn and reported to the host from the Si2457/34/15/04. (See Table12 on page38.) Basic results; disable CPM—Blind dial (does not wait for dial tone). CONNECT message X0 does not include speed. X1 Extended results; disable CPM—Blind dial. CONNECT message includes speed. Extended results and detect dial tone only—Add dial tone detection to X1 mode. Does not X2 blind dial. X3 Extended results and detect busy only—Add busy tone detection to X1 mode. X4 Extended results, full CPM—Full CPM enabled, CONNECT message includes speed. Extended results—Full CPM enabled including ringback detection. Adds ringback detection X5 to X4 mode. Long space disconnect—Modem hangs up after 1.5 seconds or more of continuous space Yn while on-line. Y0 Disable. Y1 Enable. Hard Reset—This command is functionally equivalent to pulsing the RESET pin low. (See Z t in Table6 on page7.) AT :E Read from serial EEPROM. Interrupt Read—This command causes the ISOmodem® to report the lower 8 bits of the :I interrupt register I/O Control 0 (U70). The CID, OCD, PPD, and RI bits also are cleared, and the INT pin (INT bit in parallel mode) is deactivated on this read. :M Write to serial EEPROM. Program RAM Write—This command is used to upload firmware supplied by Silicon Labs to the Si2457/34/15/04. The format for this command is AT:Paaaa,xxxx,yyyy,.... where aaaa is the first address in hexadecimal and xxxx,yyyy,.... is data in hexadecimal. Only one :P com- :P mand is allowed per AT command line. No other commands can be concatenated in the :P command line. This command is only for use with special files provided by Silicon Laborato- ries. Do not attempt to use this command for any other purpose. User-Access Register Read—This command allows the user to read from the user-access registers (see "6. User-Access Registers (U-Registers)" on page 44). The format is “AT:Raa”, :R where: aa=user-access address in hexadecimal. The “AT:R” command causes all the U- registers to be displayed. 24 Rev. 1.3

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action User-Access Register Write—This command allows the user to write to the 16-bit user- access registers. (See page page44.) The format is “AT:Uaa,xxxx,yyyy,zzzz,...” where aa=user-access address in hexadecimal. :U xxxx=Data in hexadecimal to be written to location aa. yyyy=Data in hexadecimal to be written to location (aa + 1). zzzz=Data in hexadecimal to be written to location (aa + 2). etc. Data compression reporting. X Mode 0 Disabled 1 Enabled If enabled, the intermediate result code is transmitted at the point after error control negotia- +DR=X tion. The format of this result code is as follows: Result code Mode +DR:NONE Data compression is not in use +DR:V42B Rec. V.42bis is in use in both directions +DR:V42B RD Rec. V.42bis is in use in receive direction only +DR:V42B TD Rec. V.42bis is in use in transmit directions only Controls V.42bis data compression function. A Direction 0 No compression 1 Transmit only +DS Options 2 Receive only +DS=A 3 Both Directions +DS=A,B B Compression_negotiation +DS=A,B,C 0 Do not disconnect if V.42 is not negotiated. +DS=A,B,C,D 1 Disconnect is V.42 is not negotiated. C Maximum dictionary size 512 D Maximum string size 6 to 250 (28 default) Enable synchronous access mode. A Specifies the mode of operation when initiating a modem connection. D Disable synchronous assess mode. 6 Enable synchronous access mode when connection is completed and data state is +ES Options entered. +ES=A B Specifies fallback mode of operation. +ES=A,,C This parameter should not be used. C Specifies the mode of operation when answer a modem connection. D Disable synchronous assess mode. 8 Enable synchronous access mode when connection is completed and data state is entered. Rev. 1.3 25

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action Synchronous access mode control options A Specifies action taken if an underrun condition occurs during transparent sub-mode. 0 Modem transmits 8-bit SYN sequences on idle. B Specifies action taken if an underrun condition occurs after a flag during framed sub- mode 0 Modem transmits 8-bit HDLC flags on idle. +ESA Options C Specifies action taken if an underrun or overrun condition occurs after a non-flag during +ESA=A framed sub-mode. +ESA=A,B 0 Modem transmits abort on underrun in middle of frame. +ESA=A,B,C 1 Modem transmits flag on underrun in middle of frame and notifies host of underrun +ESA=A,B,C,E or overrun. +ESA=A,B,C,E,F D Specifies V.34 half duplex operation. +ESA=A,B,C,E,F, This parameter should not be used. G E Specifies CRC polynomial used while in framed sub-mode. 0 CRC generation checking disable. 1 16-bit CRC generation and checking is performed by the modem. F Specifies NRZI encoding and decoding. 0 NRZI encoding and decoding disabled. G Specifies SYN. 255 Class 1 Mode Enable for V.29 fast connect. X Mode +FCLASS=X 0 Off 1 Enables support for Class 1 mode for use in the V.29 fast connect mode. Class 1 Receive Carrier for V.29 fast connect. X Mode 2 Transmit V.21 (980Hz) tone for longer than 100ms, then send answer tone +FRM=X (2100/2225Hz) for 200ms. 95 V.29 short synchronous. 96 V.29 full synchronous. Class 1 Transmit Carrier for V.29 fast connect. X Mode 2 Transmit V.21 (980Hz) tone. 53 Same as &T4, but transmit V.29 7200bps. Data pattern set by S40 register. AT + FCLASS=0 must be sent to restore the ISOmodem® to normal operation after +FTM=X test. 54 Same as &T4, but transmit V.29 9600bps. Data pattern set by S40 register. AT + FCLASS=0 must be sent to restore the ISOmodem to normal operation after test. 95 V.29 short synchronous. 96 V.29 full synchronous. 26 Rev. 1.3

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action Country settings - Automatically configure all registers for a particular country. X Country 0 Japan 9 Australia A Austria F Belgium 16 Brazil 1B Bulgaria 20 Canada 26 China 27 Columbia 2E Czech Republic 31 Denmark 35 Ecuador 3C Finland 3D France 42 Germany 46 Greece 50 Hong Kong 51 Hungary 53 India 57 Ireland 58 Israel +GCI=X 59 Italy 61 South Korea 69 Luxembourg 6C Malaysia 73 Mexico 7B Netherlands 7E New Zealand 82 Norway 87 Paraguay 89 Philippines 8A Poland 8B Portugal 9C Singapore 9F South Africa A0 Spain A5 Sweden A6 Switzerland B8 Russia B4 United Kingdom B5 United States FE Taiwan Note: U-registers are configured to Silicon Laboratories’ recommended values. The +GCI command resets the U-registers and the S7 and S6 S-registers to default values before setting country- specific values. Changes may be made by writing individual registers after sending the AT+GCI command. Refer to “AN93: ISOModem® Chipset Family Designer’s Guide” for details. +GCI? List current country code setting (response is: + GCI:<setting>) +GCI=? List all possible country code settings. Rev. 1.3 27

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action Specifies the flow control to be implemented. A Specifies the flow control method used by the host to control data from the modem 0 None 1 Local XON/OFF flow control. Does not pass XON/XOFF character to the remote +IFC Options modem. +IFC=A 2 Hardware flow control (RTS) +IFC=A,B B Specifies the flow control method used by the modem to control data from the host 0 None 1 Local XON/OFF flow control. 2 Hardware flow control (CTS). Transmit flow control threshold. A Threshold above which the modem will generate a flow off signal +ITF Options <0 to 511> bytes +ITF=A B Threshold below which the modem will generate a flow on signal +ITF=A,B <0 to 511> bytes +ITF=A,B,C C Polling interval for <EM><BNUM> indicator 0 to 300 in 10msec units. Modulation reporting control. X Mode 0 Disabled 1 Enabled +MR=X If enabled, the intermediate result code is transmitted at the point during connect negotiation. The format of this result code is as follows: +MCR: <carrier> e.g. +MCR: V32B +MRR: <rate> e.g. +MRR: 14400 Modulation Selection. A Preferred modem carrier V21 ITU-T V.21 V22 ITU-T V.22 V22B ITU-T V.22bis (default for Si2404) V32 ITU-T V.32 +MS Options V32B ITU-T V.32bis (default for Si2415) +MS=A V34 ITU-T V.34 (default for Si2434) +MS=A,B V90 ITU-T V.90 (default for Si2457) +MS=A,B,C B Automatic modulation negotiation +MS=A,B,C,D 0 Disabled +MS=A,B,C,D,E 1 Enabled +MS=A,B,C,D,E,F C,D Min TX rate/Max TX rate are optional numeric values that specify the lowest value at which the DCE may establish a connection. If unspecified (set to 0), they are determined by the carrier and automode settings. E,F Min RX rate/Max RX rate are optional numeric values which specify the highest value at which the DCE may establish a connection. If unspecified (set to 0), they are determined by the carrier and automode settings. 28 Rev. 1.3

Si2457/34/15/04 Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Action Controls the action to be taken upon detection of call waiting. X Mode +PCW=X 0 Toggle RI and collect type II Caller ID if enabled by +VCID. 1 Hang up. 2 Ignore call waiting. Caller ID Type. X Mode 0 After ring only +VCDT=X 1 Always on (Recommended Setting) 2 UK 3 Japan Caller ID Enable. X Mode +VCID=X 0 Off 1 On—formatted 2 On—raw data format Type II caller ID information — The Si2457/34/15/04 will display “+VCDIR:” followed by raw +VCIDR? caller ID information including checksum. Rev. 1.3 29

Si2457/34/15/04 4.21. Extended AT Commands The extended AT commands are supported by the Si2457/34/15/04 and are described in Tables 9 through 11. Table 9. Extended AT& Command Set (Command Defaults in Bold) Command Action &$ Display AT& current settings. &D0 ESC is not used &D1 ESC escapes to command mode from data mode if also enabled by HES U70, bit 15. &D2 ESC assertion during a modem connection causes the modem to go on-hook and return to com- mand mode. &D3 ESC assertion causes ATZ command (reset and return OK result code). &F Restore factory default settings. &Gn Line connection rate limit—This command sets an upper limit on the line speed that the Si2457/34/ 15/04 can connect. Note that the &Hn commands may limit the line speed as well (&Gn not used for &H0 or &H1). Not all modulations support rates given by &G. Any improper setting will be ignored. &G3 1200bps max &G4 2400bps max (default for Si2404) &G5 4.8kbps max &G6 7.2kbps max &G7 9.6kbps max &G8 12kbps max &G9 14.4kbps max (default for Si2415) &G10 16.8kbps max &G11 19.2kbps max &G12 21.6kbps max &G13 24kbps max &G14 26.4kbps max &G15 28.8kbps max &G16 31.2kbps max &G17 33.6kbps max (default for Si2457 and Si2434) &Hn Switched network handshake mode—&Hn commands must be on a separate command line from ATD, ATA, or ATO commands. &H0 V.90 with automatic fallback (56kbps to 300bps) (default for Si2457) &H1 V.90 only (56kbps to 28kbps) &H2 V.34 with automatic fallback (33.6kbps to 300bps) (default for Si2434) &H3 V.34 only (33.6kbps to 2400bps) 30 Rev. 1.3

Si2457/34/15/04 Table 9. Extended AT& Command Set (Command Defaults in Bold) (Continued) Command Action &H4 ITU-T V.32bis with automatic fallback (14.4kbps to 300bps) (default for Si2415) &H5 ITU-T V.32bis only (14.4kbps to 4800bps) &H6 ITU-T V.22bis only (2400bps or 1200bps) &H7 ITU-T V.22 only (1200bps) &H8 Bell 212 only (1200bps) &H9 Bell 103 only (300bps) &H10 ITU-T V.21 only (300bps) &H11 V.23 (1200/75bps) &Pn Japan pulse dialing &P0 Configure Si2457/34/15/04 for 10 pulse-per-second pulse dialing. For Japan. &P1 Configure Si2457/34/15/04 for 20 pulse-per-second pulse dialing. For Japan. &Tn Test mode &T0 Cancel test mode (Escape to command mode to issue AT&T0). This command will also report the number of bit errors encountered on the previous &T4 or &T5 test. &T2 Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the DSP (Si2457/34/15/04 device) only. ISOmodem® echoes data from TX pin (Register0 in parallel mode) back to RX pin (Register0 in parallel mode). &T3 Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the DSP (Si2457/34/15/04), DAA interface section (Si2457/34/15/04), DAA interface (Si3018), and ana- log hybrid circuit (Si3018). ISOmodem echoes data from TX pin (Register 0 in parallel mode) back to RX pin (Register 0 in parallel mode). Phone line termination required as in Figure1. To test only the link operation, the hybrid and AFE codec can be removed from the test loop by setting the DL bit (U62, bit1). &T4 Initiate transmit as originating modem with automatic data generation. Modulation, data rate, and symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the ATH command is sent after an escape into command mode. Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the test using &T0. &T5 Initiate transmit as answering modem with automatic data generation. Modulation, data rate, and symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the ATH command is sent after an escape into command mode. Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the test using &T0. &T6 Compute checksum for firmware-upgradeable section of program memory. If no firmware upgrade is installed, &T6 returns 0x4474. &Xn Automatic determination of telephone line type. &X0 Abort &x1 or &x2 command. Rev. 1.3 31

Si2457/34/15/04 Table 9. Extended AT& Command Set (Command Defaults in Bold) (Continued) Command Action &X1 Automatic determination of telephone line type. Result code: WXYZn W: 0=line supports DTMF dialing. 1=line is pulse dial only. X: 0=line supports 20pps dialing. 1=line supports 10pps dialing only. Y: 0=extension network present (PBX). 1=outside line (PSTN) connected directly. Z: 0=continuous dialtone. 1=make-break dialtone. n: 0–9 (number required for outside line if Y=0). Note: The initial number attempted for an outside line is controlled in S51. &X2 Same as &X1, but Y result (PBX) is not tested. *Y2A Produce a constant answer tone (ITU-T) and return to command mode. The answer tone continues until the ATH command is received or the S7 timer expires. &Z Enter low-power wake-on-ring mode. 32 Rev. 1.3

Si2457/34/15/04 Table 10. Extended AT% Command Set (Command Defaults in Bold) Command Action %$ Display AT% command settings. %B Report blacklist. See also S42 register. %Cn Data compression %C0 Disable V.42bis and MNP5 data compression %C1 Enable V.42bis in transmit and receive paths. If MNP is selected (\N2), then %C1 enables MNP5 in transmit and receive paths. %C2 Enable V.42bis in transmit path only. %C3 Enable V.42bis in receive path only. %On Answer mode. %O1 Si2457/34/15/04 will auto-answer a call in answer mode. %O2 Si2457/34/15/04 will auto-answer a call in originate mode. %Vn Automatic Line Status Detection. After the %V1 and %V2 commands are issued, the Si2457/34/15/04 will automatically check the telephone connection for whether or not a line is present. If a line is present, the Si2457/34/15/04 will automatically check if the line is already in use. Finally, the Si2457/34/15/04 will check line status both before going off-hook and again before dialing. %V1 uses the fixed method, and %V2 uses the adaptive method. %V0 (default) disables this feature. %V0 Disable automatic line-in-use detection. %V1 Automatic Line Status Detection—Fixed Method. Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 com- pares the line voltage (via LVCS) to registers NOLN (U83) and LIUS (U84): Loop Voltage Action 0LVCSNOLN Report “NO LINE” and remain on-hook. NOLNLVCSLIUS Report “LINE IN USE” and remain on-hook. LIUSLCVS Go off-hook and establish a modem connection. Once the call has begun, the off-hook intrusion algorithm (described in "4.12.2. Off-Hook Intrusion Detection" on page 19) operates normally. In addition, the Si2457/34/15/04 will report “NO LINE” if the telephone line is completely disconnected. If the HOI bit (U77, bit 11) is set, “LINE IN USE” is reported upon intrusion. Rev. 1.3 33

Si2457/34/15/04 Table 10. Extended AT% Command Set (Command Defaults in Bold) (Continued) Command Action %V2 Automatic Line Status Detection—Adaptive Method. Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 com- pares the line voltage (via LVCS) to the NLIU (U85) register: Loop Voltage Action 0LVCS(0.0625xNLIU) Report “NO LINE” and remain on-hook. (0.0625xNLIU)<LVCS(0.85xNLIU) Report “LINE IN USE” and remain on-hook. (0.85xNLIU)<LCVS Go off-hook and establish a modem connection. The NLIU register is updated every 1ms with the minimum non-zero value of LVCS in the last 30ms. This allows the Si2457/34/15/04 to eliminate errors due to 50/60Hz interference and also adapt to relatively slow change in the on-hook dc reference value on the telephone line. This algo- rithm does not allow any non-zero values for NLIU below 0x0007. The host may also initialize NLIU prior to issuing the %V2 command. Once the call has begun, the off-hook intrusion algorithm (described in "4.12.2. Off-Hook Intrusion Detection" on page 19) operates normally. In addition, the Si2457/34/15/04 will report “NO LINE” if the telephone line is completely disconnected. If the HOI (U77, bit 11) bit is set, “LINE IN USE” is reported upon intrusion. 34 Rev. 1.3

Si2457/34/15/04 Table 11. Extended AT\ Command Set (Command Defaults in Bold) Command Action \$ Display AT\ command settings. \Bn Character length will be automatically set in autobaud mode \B0 6N1—six data bits, no parity, one stop bit, one start bit, eight bits total (\N0 only)1 \B1 7N1—seven data bits, no parity, one stop bit, one start bit, nine bits total (\N0 only)1 \B2 7P1—seven data bits, parity optioned by \P, one stop bit, one start bit, 10 bits total \B3 8N1—eight data bits, no parity, one stop bit, one start bit, 10 bits total \B5 8P1—eight data bits, parity optioned by \P, one stop bit, one start bit, 11 bits total (\N0 only) \B6 8X1—eight data bits, one escape bit, one stop bit, one start bit, 11 bits total (enables ninth-bit escape mode) \Nn Asynchronous protocol \N0 Wire mode (no error correction, no compression) \N2 MNP reliable mode. The Si2457/34/15/04 attempts to connect with the MNP protocol. If unsuccess- ful, the call is dropped. \N3 V.42 auto-reliable—The Si2457/34/15/04 attempts to connect with the V.42 protocol. If unsuc- cessful, the MNP protocol is attempted. If unsuccessful, wire mode is attempted. \N4 V.42 (LAPM) reliable mode (or drop call)—Same as \N3 except that the Si2457/34/15/04 drops the call instead of connecting in MNP or wire mode. \N5 V.42 and MNP reliable mode—The Si2457/34/15/04 attempts to connect with V.42. If unsuccessful, MNP is attempted. If MNP us unsuccessful, the call is dropped. \Pn Parity type will be automatically set in autobaud mode \P0 Even \P1 Space1 \P2 Odd \P3 Mark1 \Qn Modem-to-DTE flow control \Q0 Disable all flow control—This may only be used if the DTE speed and the VF speed are guaranteed to match throughout the call. \Q2 Use CTS only Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. 3. Default is \T9 if a pulldown resistor is connected to the autobaud strap pin; otherwise, the default is \T16. Rev. 1.3 35

Si2457/34/15/04 Table 11. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command Action \Q3 Use RTS/CTS \Q4 Use XON/XOFF flow control for modem-to-DTE interface. Does not enable modem-to-modem flow control. \Tn DTE rate—Change DTE rate. When the Si2457/34/15/04 is configured in autobaud mode (default), \T0 through \T15 will lock the new baud rate and disable autobaud. When the ISOmodem® is not in autobaud mode (the autobaud strap pin low on powerup), the result code “OK” is sent at the old DTE rate. Subsequent commands must be sent at the new rate. \T0 300bps \T1 600bps \T2 1200bps \T3 2400bps \T4 4800bps \T5 7200bps \T6 9600bps \T7 12.0kbps2 \T8 14.4kbps \T9 19.2kbps3 \T10 38.4kbps \T11 57.6kbps \T12 115.2kbps \T13 230.4kbps \T14 245.760kbps2 \T15 307.200kbps \T16 Autobaud on3 \T17 Autobaud off; lock at current baud rate. Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. 3. Default is \T9 if a pulldown resistor is connected to the autobaud strap pin; otherwise, the default is \T16. 36 Rev. 1.3

Si2457/34/15/04 Table 11. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command Action \U Serial mode—causes a low pulse (25ms) on RI and DCD. INT to be the inverse of ESC. RTS to be inverse of CTS. Parallel mode—causes a low pulse (25ms) on INT. This command terminates with a RESET. \Vn Connect message type \V0 Report connect message and protocol message \V2 Report connect message only (exclude protocol message) \V4 Report connect and protocol message with both upstream and downstream connect rates. Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. 3. Default is \T9 if a pulldown resistor is connected to the autobaud strap pin; otherwise, the default is \T16. Rev. 1.3 37

Si2457/34/15/04 Table 12. Result Codes Numeric Meaning Verbal Response X0 X1 X2 X3 X4 X5 0 Command was successful OK X X X X X X 1 Link established at 300bps CONNECT X X X X X X or higher 2 Incoming ring detected RING X X X X X X 3 Link dropped NO CARRIER X X X X X X 4 Command failed ERROR X X X X X X 5 Link establish at 1200 CONNECT 1200 X X X X X 6 Dial tone not present NO DIALTONE X X X 7 Line busy BUSY X X X 8 Remote not answering NO ANSWER X X X X X X 9 Ringback detected RINGING X 10 Link established at 2400 CONNECT 2400 X X X X X 11 Link established at 4800 CONNECT 48001 X X X X X 12 Link established at 9600 CONNECT 96001 X X X X X 14 Link established at 19200 CONNECT 192001 X X X X X 15 Link established at 7200 CONNECT 72001 X X X X X 16 Link established at 12000 CONNECT 120001 X X X X X 17 Link established at 14400 CONNECT 144001 X X X X X 18 Link established at 16800 CONNECT 168002 X X X X X 19 Link established at 21600 CONNECT 216002 X X X X X 20 Link established at 24000 CONNECT 240002 X X X X X 21 Link established at 26400 CONNECT 264002 X X X X X 22 Link established at 28800 CONNECT 288002 X X X X X 23 Link established at 31200 CONNECT 312002 X X X X X 24 Link established at 33600 CONNECT 336002 X X X X X 30 Caller ID mark detected CIDM X X X X X X 31 Hookswitch flash detected FLASH X X X X X X 32 UK CID State Tone Alert STAS X X X X X X Signal detected 33 Overcurrent condition X2 X X X X X X 40 Blacklist is full BLACKLIST FULL (enabled X X X X X X via S42 register) 41 Attempted number is black- BLACKLISTED (enabled via X X X X X X listed. S42 register) 42 No phone line present NO LINE (enabled via %Vn X X X X X X commands) Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. 4. This message is only supported on the Si2457. 38 Rev. 1.3

Si2457/34/15/04 Table 12. Result Codes (Continued) Numeric Meaning Verbal Response X0 X1 X2 X3 X4 X5 43 Telephone line is in use LINE IN USE (enabled via X X X X X X %Vn commands) 44 A polarity reversal was POLARITY REVERSAL X X X X X X detected (enabled via G modifier) 45 A polarity reversal was NOT NO POLARITY REVERSAL X X X X X X detected (enabled via G modifier) 52 Link established at 56000 CONNECT 560004 X X X X X 60 Link established at 32000 CONNECT 320004 X X X X X 61 Link established at 48000 CONNECT 480004 X X X X X 63 Link established at 28000 CONNECT 280004 X X X X X 64 Link established at 29333 CONNECT 293334 X X X X X 65 Link established at 30666 CONNECT 306664 X X X X X 66 Link established at 33333 CONNECT 333334 X X X X X 67 Link established at 34666 CONNECT 346664 X X X X X 68 Link established at 36000 CONNECT 360004 X X X X X 69 Link established at 37333 CONNECT 373334 X X X X X 70 No protocol PROTOCOL: NONE Set with \V0 command. 75 Link established at 75 CONNECT 75 X X X X X 77 V.42 protocol PROTOCOL: V42 Set with \V0 command. 79 V.42bis protocol PROTOCOL: V42bis Set with \V0 command. 80 MNP2 protocol PROTOCOL: Set with \V command. ALTERNATE, + CLASS 2 81 MNP3 protocol PROTOCOL: Set with \V command. ALTERNATE, + CLASS 3 82 MNP4 protocol PROTOCOL: Set with \V command. ALTERNATE, + CLASS 4 83 MNP5 protocol PROTOCOL: X X X X X ALTERNATE, + CLASS 5 90 Link established at 38666 CONNECT 386664 X X X X X 91 Link established at 40000 CONNECT 400004 X X X X X 92 Link established at 41333 CONNECT 413334 X X X X X 93 Link established at 42666 CONNECT 426664 X X X X X 94 Link established at 44000 CONNECT 440004 X X X X X 95 Link established at 45333 CONNECT 453334 X X X X X 96 Link established at 46666 CONNECT 466664 X X X X X 97 Link established at 49333 CONNECT 493334 X X X X X 98 Link established at 50666 CONNECT 506664 X X X X X Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. 4. This message is only supported on the Si2457. Rev. 1.3 39

Si2457/34/15/04 Table 12. Result Codes (Continued) Numeric Meaning Verbal Response X0 X1 X2 X3 X4 X5 99 Link established at 52000 CONNECT 520004 X X X X X 100 Link established at 53333 CONNECT 533333 X X X X X 101 Link established at 54666 CONNECT 546663 X X X X X 102 DTMF dial attempted on a UN–OBTAINABLE NUMBER X X X X X X pulse dial only line Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434. 3. X is the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. 4. This message is only supported on the Si2457. 40 Rev. 1.3

Si2457/34/15/04 5. S-Registers The S command allows reading (Sn?) or writing (Sn=x) the S-registers. The S-registers store values for functions that typically are rarely changed, such as timers or counters, and the ASCII values of control characters, such as carriage return. Table13 summarizes the S-register set. Table 13. S-Register Description Definition S-Register Function Default Range Units (Decimal) (Decimal) 0 Automatic answer—Number of rings the Si2457/34/15/ 0 0–255 Rings 04 must detect before answering a call. 0 disables auto answer. 1 Ring counter. 0 0–255 Rings 2 ESC code character. 43 (+) 0–255 ASCII 3 Carriage return character. 13 (CR) 0–255 ASCII 4 Linefeed character. 10 (LF) 0–255 ASCII 5 Backspace character. 08 (BS) 0–255 ASCII 6 Dial tone wait timer—Number of seconds the Si2457/ 02 0–255 seconds 34/15/04 waits before blind dialing. Only applicable if blind dialing is enabled (X0, X1, X3). 7 Carrier wait timer—Number of seconds the Si2457/34/ 80 0–255 seconds 15/04 waits for carrier before timing out. This register also sets the number of seconds the modem waits for ringback when originating a call before hanging up. This register also sets the number of seconds the answer tone will continue while using the AT*Y2A command. 8 Dial pause timer for, and < dial command modifiers. 02 0–255 seconds 9 Carrier presence timer—Time after a loss of carrier 06 1–255 0.1 second that a carrier must be detected before reactivating DCD. S9 is referred to as “carrier loss debounce time.” 10 Carrier loss timer—Time the carrier must be lost before 14 1–255 0.1 second the Si2457/34/15/04 disconnects. Setting 255 disables disconnect entirely. If S10 is less than S9, even a momentary loss of carrier causes a disconnect. 12 Escape code guard timer—Minimum guard time 50 1–255 0.02 second required before and after “+++” for the Si2457/34/15/ 04 to recognize a valid escape sequence. 14 Wait for dial tone delay value (in relation to the W dial 12 0–255 seconds modifier). Starts when “W” is executed in the dial string. Rev. 1.3 41

Si2457/34/15/04 Table 13. S-Register Description (Continued) Definition S-Register Function Default Range Units (Decimal) (Decimal) 24 Sleep Inactivity Time—Sets the time that the modem 0 0–255 seconds operates in normal power mode with no activity on the serial port, parallel port, or telephone line before enter- ing low-power sleep mode. This feature is disabled if the timer is set to 0. 30 Disconnect Activity Timer—Sets the length of time that 0 0–255 minutes the modem stays online before disconnecting with no activity on the serial port, parallel port, or telephone line (Ring, hookswitch flash, or caller ID). This feature is disabled if set to 0. 38 Hang Up Delay Time—Maximum delay between 20 0–255 seconds receipt of ATH0 command and hang up. If time out occurs before all data can be sent, the NO CARRIER (3) result code is sent (operates in V.42 mode only). “OK” response is sent if all data is transmitted before timeout. S38=255 disables timeout and modem dis- connects only if data is successfully sent or carrier is lost. 40 Data Pattern—Data pattern generated during &T4 and 0 0–2 &T5 transmit tests. 0=All spaces (0s) 1=All marks (1s) 2=Random data 41 V.34 symbol rate - Symbol rate for V.34 when using the 0 0–5 &T4 and &T5 commands. 0=2400 symbols/second 1=2743 symbols/second 2=2800 symbols/second 3=3000 symbols/second 4=3200 symbols/second 5=3429 symbols/second A valid combination of symbol rate (S41) and data rate (&G) must be selected. Symbol Rate Allowable Data Rates 2400 2400–21600 2743 4800–26400 2800 4800–26400 3000 4800–28800 3200 4800–31200 3429 4800–33600 42 Rev. 1.3

Si2457/34/15/04 Table 13. S-Register Description (Continued) Definition S-Register Function Default Range Units (Decimal) (Decimal) 42 Blacklisting—The Si2457/34/15/04 will not dial the 0 (disabled) 0–1 same number more than two times in three minutes. An attempt to dial a third time within three minutes will result in a “BLACKLISTED” result code. If the blacklist memory is full, any dial to a new number will result in a “BLACKLIST FULL” result code. Numbers are added to the blacklist only if the modem connection fails. The %B command will list the numbers on the blacklists. 0=disabled 1=enabled 43 Dial Attempts to Blacklist. 4 0–4 When blacklisting is enabled with S42, this value con- trols the number of dial attempts that will result in a number being blacklisted. 44 Blacklist Timer. 180 0–255 seconds Period during which blacklisting is active. 50 Minimum on-hook time—Modem will remain on-hook 3 0–255 seconds for S50 seconds. Any attempt to go off-hook will be delayed until this timer expires. 51 Number to start checking for an outside line on a PBX. 1 0–9 See &X command for details. Rev. 1.3 43

Si2457/34/15/04 6. User-Access Registers (U-Registers) U-Registers are 16-bit registers written by the AT:Uaa command and read by the AT:R (read all U-Registers) or AT:Raa (read U-Register aa) commands (see the AT command list in Table11 on page35). Many aspects of the modem’s and DAA’s behavior can be enabled/ disabled, configured, monitored, and/or modified through U-Registers; however, most of them will not be needed in normal use. There are two types of U-Registers. The first represents a single 16-bit term, such as a filter coefficient, threshold, delay, or other quantity. These registers can be read from or written to as a single 16-bit value. The second type of U-Register is bit-mapped. Bit-mapped registers are written and/or read in hexadecimal, but each bit or combination of bits in the register represents an independent value or status information. These individual bits are used to enable or disable features and indicate states. Some U-Registers are reserved and not available to the user. Therefore, there are gaps in the available U- Register address map. Additionally, some bits within available U-Registers are reserved. Any attempt to write a non-zero value to a reserved U-Register or bit may cause unpredictable modem operation. With over 100 U-Registers, the Si2457/34/15/04 offers an unprecedented level of programmability for a controller-based modem. A detailed list of these registers and their use is beyond the scope of this data sheet. Refer to “AN93: ISOmodem® Chipset Family Designer’s Guide” for details. 44 Rev. 1.3

Si2457/34/15/04 7. Pin Descriptions: Si2457/34/15/04 (16-Pin Option) Si2457/34/15/04 (16-Pin Option) CLKIN/XTALI 1 16 SS/RTS XTALO 2 15 DCD RI 3 14 ESC VD 4 13 VA MISO/RXD 5 12 GND MOSI/TXD 6 11 INT SCLK/CTS 7 10 C1A RESET 8 9 C2A Pin # Pin Name Description 1 CLKIN/XTALI XTALI—Crystal Oscillator Pin. Provides support for parallel resonant AT cut crystals. A 4.9152MHz or 32.768kHz crystal or a 32.768kHz or 4.9152 or 27MHz clock on XTALI is required. 2 XTALO XTALO—Crystal Oscillator Pin. Serves as the output of the crystal amplifier. 3 RI Ring Indicator. The RI on (active low) indicates the presence of an ON segment of a ring signal on the tele- phone line. 4 V Supply Voltage. D Provides the 3.3 V supply voltage to the Si2457/34/15/04. 5 MISO/RXD Master In Slave Out/Receive Data. Serial data output from modem in SPI mode. Data output to DTE RXD pin in UART mode. 6 MOSI/TXD Master Out Slave In/Transmit Data. Serial data input to modem in SPI mode. Data input from DTE TXD pin in UART mode. 7 SCLK/CTS Serial Data Clock/Clear to Send. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin. Serial data clock input in SPI mode. 8 RESET Reset Input. An active low input that is used to reset all control registers to a defined, initialized state. 9 C2A Isolation Capacitor 2A. Connects to one side of the isolation capacitor C2. 10 C1A Isolation Capacitor 1A. Connects to one side of the isolation capacitor C1. 11 INT Interrupt Output. Active low interrupt output. Rev. 1.3 45

Si2457/34/15/04 Pin # Pin Name Description 12 GND Ground. Connects to the system digital ground. 13 V Regulator Voltage Reference. A Connects to an external capacitor and serves as the reference for the internal voltage regulator. 14 ESC Escape. A positive edge on this pin causes the modem to go from online (connected) mode to the offline (command) mode. 15 DCD Carrier Detect. Active low carrier detect. 16 SS/RTS SPI Slave Select/Request to Send. Active low slave select in SPI mode. Active low request to send input used for flow control in UART mode. 46 Rev. 1.3

Si2457/34/15/04 8. Pin Descriptions: Si2457/34/15/04 (24-Pin Option) Si2457/34/15/04 (24-Pin Option) CLKIN/XTALI 1 24 SDO/EECLK/D5 XTALO 2 23 DCD/D4 CLKOUT/EECS/A0 3 22 ESC/D3 FSYNC/D6 4 21 VD3.3 VD3.3 5 20 GND GND 6 19 VDB VDA 7 18 SDI/EESD/D2 SS/RTS/D7 8 17 RI/D1 MISO/RXD/RD 9 16 INT/DO MOSI/TXD/WR 10 15 AOUT/INT SCLK/CTS/CS 11 14 C1A RESET 12 13 C2A Pin # Pin Name Description 1 CLKIN/XTALI Clock Input/Crystal Oscillator Pin. Provides support for parallel resonant AT cut crystals. A 4.9152MHz or 32.768kHz crystal or a 32.768kHz or 4.9152 or 27MHz clock on XTALI is required. 2 XTALO Crystal Oscillator Pin. Serves as the output of the crystal amplifier. 3 CLKOUT/EECS/ Clock Output/EEPROM Chip Select/Address Bit 0. A0 Clock output in serial mode. Active low read/write enable for SPI EEPROM in serial mode when pin 4 is pulled low during powerup. Address Enable in parallel mode. 4 FSYNC/D6 Frame Sync/Data Bit. Frame Sync output to codec in serial mode. Bidirectional parallel bus data bit 6 in parallel mode. 5, 21 VD3.3 Digital Supply Voltage. Provides the 3.3V supply voltage to the Si2457/34/15/04. 6, 20 GND Ground. Connects to the system digital ground. 7,19 VDA, VDB Regulator Voltage Reference. Connects to an external capacitor and serves as the reference for the internal voltage regulator. 8 SS/RTS/D7 SPI Slave Select/Request to Send/Data Bit. Active low slave select in SPI mode. Active low request to send input used for flow control in UART mode. Bidirec- tional parallel bus data bit 7 in parallel mode. Rev. 1.3 47

Si2457/34/15/04 Pin # Pin Name Description 9 MISO/RXD/RD Master In Slave Out/Receive Data/Read Enable. Serial data output from modem in SPI mode. Data output to DTE RXD pin in UART mode. Active low read enable pin in parallel mode. 10 MOSI/TXD/WR Master Out Slave In/Transmit Data/Write Enable. Serial data input to modem in SPI mode. Data input from DTE TXD pin in serial mode. Active low write enable pin in parallel mode. 11 SCLK/CTS/CS Serial Data Clock/Clear to Send/Chip Select. Serial data clock input in SPI mode. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin in data mode. Active low chip select in parallel mode. 12 RESET Reset Input. An active low input that is used to reset all control registers to a defined initialized state. 13 C2A Isolation Capacitor 2A. Connects to one side of the isolation capacitor, C2. 14 C1A Isolation Capacitor 1A. Connects to one side of the isolation capacitor, C1. 15 AOUT/INT Analog Output/Interrupt Output. Analog output in serial mode. Active low interrupt output in parallel mode. 16 INT/D0 Interrupt Output/Data Bit. Active low interrupt output in serial mode. Bidirectional parallel bus data bit 0 in parallel mode. 17 RI/D1 Ring Indicator/Data Bit. The RI on (active low) indicates the presence of an ON segment of a ring signal on the telephone line. Bidirectional parallel bus data bit 1 in parallel mode. 18 SDI/EESD/D2 Serial Data In/EEPROM Serial Data Input/Output/Data Bit. Serial Data In (to codec) output in serial mode. Bidirectional Input/Output to SPI EEPROM in serial mode when pin 4 is pulled low during power up. Bidirectional parallel bus data bit 2 in parallel mode. 22 ESC/D3 Escape/Data Bit. Hardware escape in serial mode. Bidirectional parallel bus data bit 3 in parallel mode. 23 DCD/D4 Carrier Detect/Data Bit. Active low carrier detect in serial mode. Bidirectional parallel bus data bit 4 in par- allel mode. 24 SDO/EECLK/D5 Serial Data Out/EEPROM Clock/Data Bit 5. Serial Data Out (from codec) input in serial mode. Clock output for SPI EEPROM in serial mode when pin 4 is pulled low during power up. Bidirectional parallel bus data bit 5 in parallel mode. 48 Rev. 1.3

Si2457/34/15/04 9. Pin Descriptions: Si3018/10 Si3018/10 QE 1 16 DCT2 DCT 2 15 IGND RX 3 14 DCT3 IB 4 13 QB C1B 5 12 QE2 C2B 6 11 SC VREG 7 10 VREG2 RNG1 8 9 RNG2 Table 14. Si3018/10 Pin Descriptions Pin # Pin Name Description 1 QE Transistor Emitter. Connects to the emitter of Q3. 2 DCT DC Termination. Provides dc termination to the telephone network. 3 RX Receive Input. Serves as the receive side input from the telephone network. 4 IB Internal Bias. Provides a bias voltage to the device. 5 C1B Isolation Capacitor 1B. Connects to one side of isolation capacitor C1 and communicates with the system side. 6 C2B Isolation Capacitor 2B. Connects to one side of isolation capacitor C2 and communicates with the system side. 7 VREG Voltage Regulator. Connects to an external capacitor to provide bypassing for an internal power supply. 8 RNG1 Ring 1. Connects through a resistor to the RING lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04. 9 RNG2 Ring 2. Connects through a resistor to the TIP lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04. 10 VREG2 Voltage Regulator 2. Connects to an external capacitor to provide bypassing for an internal power supply. 11 SC SC Connection. Enables external transistor network. Should be tied through a 0 resistor to I . GND 12 QE2 Transistor Emitter 2. Connects to the emitter of Q4. 13 QB Transistor Base. Connects to the base of transistor Q4. 14 DCT3 DC Termination 3. Provides the dc termination to the telephone network. 15 IGND Isolated Ground. Connects to ground on the line-side interface. 16 DCT2 DC Termination 2. Provides dc termination to the telephone network. Rev. 1.3 49

Si2457/34/15/04 10. Ordering Guide Chipset Max Speed System-Side System-Side* Line-Side* Temp Range Package Si2457 56kbps 24-pin TSSOP Si2457-D-FT Si3018-F-FS 0 to 70°C Si2457 56kbps 16-pin SOIC Si2457-D-FS Si3018-F-FS 0 to 70°C Si2434 33.6kbps 24-pin TSSOP Si2434-D-FT Si3018-F-FS 0 to 70°C Si2434 33.6kbps 16-pin SOIC Si2434-D-FS Si3018-F-FS 0 to 70°C Si2415 14.4kbps 24-pin TSSOP Si2415-D-FT Si3018-F-FS 0 to 70°C Si2415 14.4kbps 16-pin SOIC Si2415-D-FS Si3018-F-FS 0 to 70°C Si2404 2400bps 24-pin TSSOP Si2404-D-FT Si3010-F-FS 0 to 70°C Si2404 2400bps 16-pin SOIC Si2404-D-FS Si3010-F-FS 0 to 70°C Si2457 56kbps 24-pin TSSOP Si2457-D-GT Si3018-F-GS –40 to +85°C Si2434 33.6kbps 24-pin TSSOP Si2434-D-GT Si3018-F-GS –40 to +85°C Si2415 14.4kbps 24-pin TSSOP Si2415-D-GT Si3018-F-GS –40 to +85°C Si2404 2400bps 24-pin TSSOP Si2404-D-GT Si3018-F-GS –40 to +85°C *Note: Add an “R” at the end of the device to denote tape and reel option. 50 Rev. 1.3

Si2457/34/15/04 11. Package Markings (Top Markings) Codes for the Si2457-D-FT, Si2457-D-FS, Si2434-D-FT, Si2434-D-FS, Si2415-D-FT, Si2415-D-FS, Si2404-D-FT, Si2404-D-FS, Si3018-F-FS, and Si3010-F-FS top marks are as follows:  YY=Current Year  WW=Work Week  R=Die Revision  TTTTT=Trace Code  XX=Assembly Country Code 11.1. Si2457-D-FT Top Marking   Figure 11. Si2457-D-FT Top Marking 11.2. Si2457-D-FS Top Marking   Figure 12. Si2457-D-FS Top Marking 11.3. Si2434-D-FT Top Marking   Figure 13. Si2434-D-FT Top Marking Rev. 1.3 51

Si2457/34/15/04 11.4. Si2434-D-FS Top Marking   Figure 14. Si2434-D-FS Top Marking 11.5. Si2415-D-FT Top Marking   Figure 15. Si2415-D-FT Top Marking 11.6. Si2415-D-FS Top Marking   Figure 16. Si2415-D-FS Top Marking 11.7. Si2404-D-FT Top Marking   Figure 17. Si2404-D-FT Top Marking 52 Rev. 1.3

Si2457/34/15/04 11.8. Si2404-D-FS Top Marking   Figure 18. Si2404-D-FS Top Marking 11.9. Si3010-F-FS Top Marking   Figure 19. Si3010-F-FS Top Marking 11.10. Si3018-F-FS Top Marking    Figure 20. Si3018-F-FS Top Marking Rev. 1.3 53

Si2457/34/15/04 12. Package Outline: 24-Pin TSSOP Figure21 illustrates the package details for the Si2457/34/15/04 24-pin packaging option. Table15 lists the values for the dimensions shown in the illustration. Figure 21. 24-Pin Thin Shrink Small Outline Package (TSSOP) Table 15. Package Diagram Dimensions Dimension Min Nom Max A — — 1.20 A1 0.05 — 0.15 A2 0.80 1.00 1.05 b 0.19 — 0.30 c 0.09 — 0.20 D 7.70 7.80 7.90 E 6.40 BSC E1 4.30 4.40 4.50 e 0.65 BSC L 0.45 0.60 0.75 L2 0.25 BSC θ 0° — 8° aaa 0.10 bbb 0.10 ccc 0.20 Notes: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M-1994. 3. This drawing conforms to the JEDEC Solid State Outline MO-153, Variation AD. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. 54 Rev. 1.3

Si2457/34/15/04 13. 24-Pin TSSOP Land Pattern Figure22 illustrates the recommended land pattern for the Si2457/34/15/04 24-Pin TSSOP. Table16 lists the values for the dimensions shown in the illustration.   Figure 22. 24-Pin TSSOP Land Pattern Diagram Table 16. 24-Pin TSSOP PCB Land Pattern Dimension Feature (mm) C1 Pad Column Spacing 5.80 E Pad Row Pitch 0.65 X1 Pad Width 0.45 Y1 Pad Length 1.40 Notes: 1. This Land Pattern Design is based on IPC-7351 specifications for Density Level B (Median Land Protrusion). 2. All feature sizes shown are at Maximum Material Condition (MMC) and a card fabrication tolerance of 0.05mm is assumed. Rev. 1.3 55

Si2457/34/15/04 14. Package Outline: 16-Pin SOIC Figure23 illustrates the package details for the Si2457/34/15/04 16-pin packaging option. Table17 lists the values for the dimensions shown in the illustration. Figure 23. 16-Pin Small Outline Integrated Circuit (SOIC) Package 56 Rev. 1.3

Si2457/34/15/04 Table 17. Package Diagram Dimensions Dimension Min Max A — 1.75 A1 0.10 0.25 A2 1.25 — b 0.31 0.51 c 0.17 0.25 D 9.90 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0.40 1.27 L2 0.25 BSC h 0.25 0.50 θ 0° 8° aaa 0.10 bbb 0.20 ccc 0.10 ddd 0.25 Notes: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M-1994. 3. This drawing conforms to the JEDEC Solid State Outline MS-012, Variation AC. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. Rev. 1.3 57

Si2457/34/15/04 15. 16-Pin SOIC Land Pattern Figure24 illustrates the recommended land pattern for the Si2457/34/15/04 16-Pin SOIC. Table18 lists the values for the dimensions shown in the illustration.   Figure 24. 16-Pin SOIC Land Pattern Diagram Table 18. 16-Pin SOIC Land Pattern Dimensions Dimension Feature (mm) C1 Pad Column Spacing 5.40 E Pad Row Pitch 1.27 X1 Pad Width 0.60 Y1 Pad Length 1.55 Notes: General 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ASME Y14.5M-1994. 3. This Land Pattern Design is based on the IPC-7351 guidelines. 4. All dimensions shown are at Maximum Material Condition (MMC). Least Material Condition (LMC) is calculated based on a Fabrication Allowance of 0.05mm. Solder Mask Design 5. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm minimum, all the way around the pad. Stencil Design 6. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 7. The stencil thickness should be 0.125mm (5 mils). 8. The ratio of stencil aperture to land pad size should be 1:1. Card Assembly 9. A No-Clean, Type-3 solder paste is recommended. 10. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. 58 Rev. 1.3

Si2457/34/15/04 DOCUMENT CHANGE LIST Revision 0.91 to Revision 1.0  Added Figure 5 typical schematic with 16-pin system-side option.  Updated Table3 to include 16-pin system-side parameters.  Updated default register setting in Table16.  Added Si2404 information.  Added 16-pin system-side option.  Updated "4. Functional Description" on page 17.  Added "7. Pin Descriptions: Si2457/34/15/04 (16-Pin Option)" on page 45.  Updated "10. Ordering Guide" on page 50 to reflect part revision. Revision 1.0 to Revision 1.1  Added industrial temperature range devices. Revision 1.1 to Revision 1.2  Added Revision D additions and changes: 32.768kHz oscillator option SPI interface  Moved U-Register details to AN93.  Added package markings. Revision 1.2 to Revision 1.3  Removed 5V interface logic support.  Lowered digital input voltage VIND max from 5.3V to (V + 0.3)V. D  Lowered total supply current (typ) from 26 to 17mA.  Added total supply current, wake-on-ring specification. Rev. 1.3 59

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