LT1180A/LT1181A Low Power 5V RS232 Dual Driver/Receiver with m 0.1 F Capacitors FEATURES DESCRIPTIOU n ESD Protection over – 10kV The LT®1180A/LT1181A are dual RS232 driver/receiver n Uses Small Capacitors: 0.1m F pairs with integral charge pump to generate RS232 volt- n 120kBaud Operation for R = 3k, C = 2500pF age levels from a single 5V supply. These circuits feature L L n 250kBaud Operation for R = 3k, C = 1000pF rugged bipolar design to provide operating fault tolerance L L n Outputs Withstand – 30V Without Damage and ESD protection unmatched by competing CMOS n CMOS Comparable Low Power: 40mW designs. Using only 0.1m F external capacitors, these cir- n Operates from a Single 5V Supply cuits consume only 40mW of power, and can operate to n Rugged Bipolar Design 120k baud even while driving heavy capacitive loads. New n Outputs Assume a High Impedance State When Off ESD structures on the chip allow the LT1180A/LT1181A to or Powered Down survive multiple – 10kV strikes, eliminating the need for n Meets All RS232 Specifications costly TransZorbs® on the RS232 line pins. The LT1180A/ n Available With or Without Shutdown LT1181A are fully compliant with EIA RS232 standards. n Absolutely No Latch-up Driver outputs are protected from overload, and can be n Available in SO Package shorted to ground or up to – 30V without damage. During shutdown or power-off conditions, driver and receiver APPLICATIOU S outputs are in a high impedance state, allowing line sharing. n Portable Computers n Battery-Powered Systems The LT1181A is available in 16-pin DIP and SO packages. n Power Supply Generator The LT1180A is supplied in 18-pin DIP and SO packages n Terminals for applications which require shutdown. n Modems , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb is a registered trademark of General Instruments, GSI TYPICAL APPLICATIOU + 2 17 5V INPUT Output Waveforms 0.1µF 4 3 + V+ OUT LT1180A 0.1µF DRIVER OUTPUT + 5 7 V– OUT RL = 3k 0.1µF 0.1µF CL = 2500pF 6 + 12 15 RS232 OUTPUT RECEIVER LOGIC OUTPUT INPUTS 11 8 RCL = 50pF RS232 OUTPUT 13 14 RS232 INPUT INPUT LOGIC 5k OUTPUTS 10 9 RS232 INPUT LT1180A • TA02 18 5k 16 ON/OFF LT1180A • TA01 11801afb 1

LT1180A/LT1181A ABSOLUTE WAXIWUW RATIUGS (Note 1) Supply Voltage (V )................................................ 6V Short-Circuit Duration CC V+........................................................................ 13.2V V+................................................................... 30 sec V–...................................................................... –13.2V V–................................................................... 30 sec Input Voltage Driver Output.............................................. Indefinite Driver ...........................................................V– to V+ Receiver Output.......................................... Indefinite Receiver ............................................... –30V to 30V Operating Temperature Range ON/OFF................................................. –0.3V to 12V LT1180AI/LT1181AI.......................... –40(cid:176) C to 85(cid:176) C Output Voltage LT1180AC/LT1181AC............................. 0(cid:176) C to 70(cid:176) C Driver ...................................... V+ – 30V to V– + 30V Storage Temperature Range................ –65(cid:176) C to 150(cid:176) C Receiver .................................... –0.3V to V + 0.3V Lead Temperature (Soldering, 10 sec)................. 300(cid:176) C CC PACKAGE/ORDER IUFORWATIOU TOP VIEW ORDER PART ORDER PART TOP VIEW NC 1 18 ON/OFF NUMBER NUMBER C1+ 2 17 VCC C1+ 1 16 VCC V+ 3 16 GND V+ 2 15 GND C1– 4 15 TR1 OUT LT1180ACN C1– 3 14 TR1 OUT LT1181ACN C2+ 5 14 REC1 IN LT1180ACSW C2+ 4 13 REC1 IN LT1181ACSW C2– 6 13 REC1 OUT LT1180AIN C2– 5 12 REC1 OUT LT1181AIN V– 7 12 TR1 IN LT1180AISW V– 6 11 TR1 IN LT1181AISW TR2 OUT 7 10 TR2 IN TR2 OUT 8 11 TR2 IN REC2 IN 8 9 REC2 OUT REC2 IN 9 10 REC2 OUT N PACKAGE SW PACKAGE N PACKAGE SW PACKAGE 16-LEAD PDIP 16-LEAD PLASTIC SO (WIDE) T1TJM8JM-ALAXEX = A= 1D 12 25P5(cid:176)D(cid:176)CIC,P ,q qJ1AJ8A = -= L9 E80A0(cid:176)(cid:176)CDC/ P/WWL,A ,q SqJTCJC I=C = 2 S36O6(cid:176)(cid:176)C (C/WW/WI D( S(ENW))) TTJMJMAAXX = = 1 12255(cid:176)(cid:176)CC, ,q qJAJA = = 9 950(cid:176)(cid:176)CC//WW, ,q qJCJC = = 2 476(cid:176)(cid:176)CC/W/W ( S(NW)) J PACKAGE J PACKAGE 18-LEAD CERDIP LT1180AMJ 16-LEAD CERDIP LT1181AMJ TJMAX = 150(cid:176)C, q JA = 100(cid:176)C/W, q JC = 40(cid:176)C/W (J) TJMAX = 150(cid:176)C, q JA = 100(cid:176)C/W, q JC = 40(cid:176)C/W (J) OBSOLETE PACKAGE OBSOLETE PACKAGE Consider N Package for Alternate Source Consider N Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the operating temperature range (0(cid:176) C £ T £ 70(cid:176) C for commercial grade, and –40(cid:176) C £ T £ 85(cid:176) C for industrial grade. (Note 2) A A PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply Generator V+ Output 7.9 V V– Output –7.0 V Supply Current (V ) (Note 3), T = 25(cid:176) C 9 13 mA CC A l 16 mA Supply Current When OFF (V ) Shutdown (Note 4) LT1180A Only l 1 10 m A CC Supply Rise Time C1 = C2 = C3 = C4 = 0.1m F 0.2 ms Shutdown to Turn-On LT1180A Only 0.2 ms ON/OFF Pin Thresholds Input Low Level (Device Shutdown) l 0.8 1.2 V Input High Level (Device Enabled) l 1.6 2.4 V 11801afb 2

LT1180A/LT1181A ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the operating temperature range (0(cid:176) C £ T £ 70(cid:176) C for commercial grade, and –40(cid:176) C £ T £ 85(cid:176) C for industrial grade. (Note 2) A A PARAMETER CONDITIONS MIN TYP MAX UNITS ON/OFF Pin Current 0V £ V £ 5V l –15 80 m A ON/OFF Oscillator Frequency 130 kHz Driver Output Voltage Swing Load = 3k to GND Positive 5.0 7.5 V Negative l –6.3 –5.0 V Logic Input Voltage Level Input Low Level (V = High) l 1.4 0.8 V OUT Input High Level (V = Low) l 2.0 1.4 V OUT Logic Input Current 0.8V £ V £ 2.0V l 5 20 m A IN Output Short-Circuit Current V = 0V – 9 17 mA OUT Output Leakage Current Shutdown V = – 30V (Note 4) l 10 100 m A OUT Date Rate (Note 7) R = 3k, C = 2500pF 120 kBaud L L R = 3k, C = 1000pF 250 kBaud L L Slew Rate R = 3k, C = 51pF 15 30 V/m s L L R = 3k, C = 2500pF 4 7 V/m s L L Propagation Delay Output Transition t High-to-Low (Note 5) 0.6 1.3 m s HL Output Transition t Low-to-High 0.5 1.3 m s LH Receiver Input Voltage Thresholds Input Low Threshold (V = High) C Grade l 0.8 1.3 V OUT Input High Threshold (V = Low) C Grade l 1.7 2.4 V OUT Input LowI, M Grade l 0.2 1.3 V Input HighI, M Grade l 1.7 3.0 V Hysteresis l 0.1 0.4 1.0 V Input Resistance V = – 10V 3 5 7 kW IN Output Leakage Current Shutdown (Note 4) 0 £ V £ V l 1 10 m A OUT CC Output Voltage Output Low, I = –1.6mA l 0.2 0.4 V OUT Output High, I = 160m A (V = 5V) l 3.5 4.2 V OUT CC Output Short-Circuit Current Sinking Current, V = V –20 –10 mA OUT CC Sourcing Current, V = 0V 10 20 mA OUT Propagation Delay Output Transition t High-to-Low (Note 6) 250 600 ns HL Output Transition t Low-to-High 350 600 ns LH Note 1: Absolute Maximum Ratings are those values beyond which the life Note 5: For driver delay measurements, R = 3k and C = 51pF. Trigger L L of the device may be impaired. points are set between the driver’s input logic threshold and the output Note 2: Testing done at VCC = 5V and VON/OFF = 3V, unless otherwise transition to the zero crossing (tHL = 1.4V to 0V and tLH = 1.4V to 0V). specified. Note 6: For receiver delay measurements, C = 51pF. Trigger points are L Note 3: Supply current is measured as the average over several charge set between the receiver’s input logic threshold and the output transition pump cycles. C+ = C– = C1 = C2 = 0.1m F. All outputs are open, with all to standard TTL/CMOS logic threshold (tHL = 1.3V to 2.4V and tLH = 1.7V driver inputs tied high. to 0.8V). Note 4: Supply current measurements in SHUTDOWN are performed with Note 7: Data rate operation guaranteed by slew rate, short-circuit current V £ 0.1V. and propagation delay tests. ON/OFF 11801afb 3

LT1180A/LT1181A TYPICAL PERFORWAUCE CHARACTERISTICS Driver Maximum Output Voltage Driver Minimum Output Voltage vs Load Capacitance vs Load Capacitance Driver Output Voltage 8.0 –4.0 10 RL = 3k 8 7.5 –4.5 E (V) E (V) 120kBAUD GE (V) 64 VCVCC =C =5 .55VV AG 7.0 AG–5.0 TA VCC = 4.5V OLT 20kBAUD OLT 60kBAUD VOL 2 OUTPUT HIGH UT V 6.5 UT V–5.5 20kBAUD PUT 0 OUTPUT LOW UTP 60kBAUD UTP OUT –2 VCC = 4.5V AK O 6.0 AK O–6.0 VER –4 VCVCC =C =5 .55VV PE 5.5 120kBAUD PE–6.5 DRI –6 –8 5.0 –7.0 –10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 –55 –25 0 25 50 75 100 125 LOAD CAPACITANCE (nF) LOAD CAPACITANCE (nF) TEMPERATURE (°C) LT1180A • TPC01 LT1180A • TPC02 LT1180A • TPC03 Receiver Input Thresholds Supply Current vs Data Rate ON/OFF Thresholds 3.00 50 3.0 2 DRIVERS ACTIVE 2.75 RL = 3k 2.50 40 CL = 2500pF 2.5 OLTAGE (V)22..0205 INPUT HIGH RENT (mA) 30 OLTAGE (V) 2.0 ON THRESHOLD D V1.75 UR D V 1.5 RESHOL11..2550 INPUT LOW UPPLY C 20 RESHOL 1.0 H S H OFF THRESHOLD T1.00 10 T 0.5 0.75 0.50 0 0 –55 –25 0 25 50 75 100 125 0 25 50 75 100 125 150 –55 –25 0 25 50 75 100 125 TEMPERATURE (°C) DATA RATE (kBAUD) TEMPERATURE (°C) LT1180A • TPC04 LT1180A • TPC05 LT1180A • TPC06 Supply Current Driver Leakage in Shutdown Driver Short-Circuit Current 25 100 30 NT (mA) 1250 2 DRIVERS LOADED RL = 3k mNT (A) 10 RRENT (mA) 2250 ISC+ SUPPLY CURRE 10 N1 OD RLOIVAEDR LOADED RL = 3k EAKAGE CURRE 1 VOVUOTU =T –= 3300VV RT-CIRCUIT CU 1105 ISC– 5 L HO S 5 0 0.1 0 –55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) LT1180A • TPC07 LT1180A • TPC08 LT1180A • TPC09 11801afb 4

LT1180A/LT1181A TYPICAL PERFORWAUCE CHARACTERISTICS Receiver Short-Circuit Current Slew Rate vs Load Capacitance 50 16 14 A) 40 m RRENT ( 30 RX ISC– V/µs) 1120 CUIT CU 20 RX ISC+ W RATE ( 8 +SLEW CIR LE 6 T- S –SLEW HOR 10 4 S 2 0 0 –55 –25 0 25 50 75 100 125 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) LOAD CAPACITANCE (nF) LT1180A • TPC10 LT1180A • TPC11 Shutdown to Driver Outputs Driver Output Waveforms 10V DORUIVTEPRU T1 5V DRIVER OUTPUT GND RL = 3k CL = 2500pF GND DRIVER 2 –5V OUTPUT –10V DRIVER OUTPUT RL = 3k ON/OFF PIN INPUT LT1180A • TPC12 LT1180A • TPC13 PIU FUU CTIOU S V : 5V Input Supply Pin. This pin should be decoupled V+: Positive Supply Output (RS232 Drivers). V+ » 2V – CC CC with a 0.1m F ceramic capacitor close to the package pin. 1.5V. This pin requires an external charge storage capaci- Insufficient supply bypassing can result in low output tor C ‡ 0.1m F, tied to ground or V . Larger value capaci- CC drive levels and erratic charge pump operation. tors may be used to reduce supply ripple. With multiple transceivers, the V+ and V– pins may be paralleled into GND: Ground Pin. common capacitors. ON/OFF: A TTL/CMOS Compatible Operating Mode Con- V–: Negative Supply Output (RS232 Drivers). V– » –(2V trol. A logic low puts the LT1180A in shutdown mode. CC – 2.5V). This pin requires an external charge storage Supply current drops to zero and both driver and receiver capacitor C ‡ 0.1m F. Larger value capacitors may be used outputs assume a high impedance state. A logic high fully to reduce supply ripple. With multiple transceivers, the V+ enables the device. and V– pins may be paralleled into common capacitors. 11801afb 5

LT1180A/LT1181A PIU FUU CTIOU S TR1 IN, TR2 IN: RS232 Driver Input Pins. These inputs are REC1 IN, REC2 IN: Receiver Inputs. These pins accept TTL/CMOS compatible. Inputs should not be allowed to RS232 level signals (– 30V) into a protected 5k terminating float. Tie unused inputs to V . resistor. The receiver inputs are protected against ESD to CC – 10kV for human body model discharges. Each receiver TR1 OUT, TR2 OUT: Driver Outputs at RS232 Voltage provides 0.4V of hysteresis for noise immunity. Open Levels. Driver output swing meets RS232 levels for loads receiver inputs assume a logic low state. up to 3k. Slew rates are controlled for lightly loaded lines. Output current capability is sufficient for load conditions REC1 OUT, REC2 OUT: Receiver outputs with TTL/CMOS up to 2500pF. Outputs are in a high impedance state when Voltage Levels. Outputs are in a high impedance state in shutdown mode, V = 0V, or when the driver disable when in shutdown mode to allow data line sharing. Outputs CC pin is active. Outputs are fully short-circuit protected from are fully short-circuit protected to ground or V with the CC V– + 30V to V+ – 30V. Applying higher voltages will not power on, off or in the shutdown mode. damage the device if the overdrive is moderately current C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. limited. Short circuits on one output can load the power These pins require two external capacitors C ‡ 0.1m F: one supply generator and may disrupt the signal levels of the from C1+ to C1– and another from C2+ to C2–. C1 should other outputs. The driver outputs are protected against be deleted if a separate 12V supply is available and con- ESD to – 10kV for human body model discharges. nected to pin C1+. Similarly, C2 should be deleted if a separate –12V supply is connected to pin V–. ESD PROTECTIOU The RS232 line inputs of the LT1180A/LT1181A have on- ESD Test Circuit chip protection from ESD transients up to – 10kV. The 1 18 protection structures act to divert the static discharge NC ON/OFF safely to system ground. In order for the ESD protection to 2 C1+ LT1180A 5V VCC 17 + + function effectively, the power supply and ground pins of 0.1µF 0.1µF + 3 V+ GND 16 0.1µF the circuit must be connected to ground through low 4 DR1 OUT 15 impedances. The power supply decoupling capacitors and C1– RS232 charge pump storage capacitors provide this low imped- + 5 C2+ RX1 IN 14 LPIRNOET PEICNTSE D TO – 10kV ance in normal application of the circuit. The only con- 0.1µF 6 C2– RX1 OUT 13 straint is that low ESR capacitors must be used for 0.1µF + 7 V– DR1 IN 12 bypassing and charge storage. ESD testing must be done with pins V , V , V+, V–, and GND shorted to ground or RS232 8 DR2 OUT DR2 IN 11 CC L LINE PINS connected with low ESR capacitors. PROTECTED 9 RX2 IN RX2 OUT 10 TO – 10kV LT1180A • ESD TC 11801afb 6

LT1180A/LT1181A TYPICAL APPLICATIOU Supporting an LT1039 (Triple Driver/Receiver) SHUTDOWN 5V 18 17 18 17 ON/OFF VCC VCC ON/OFF LT1180A LT1039 15 4 11 8 TTL INPUT RS232 OUTPUT TTL INPUT RS232 OUTPUT 13 6 TTL INPUT RS232 OUTPUT 12 15 TTL INPUT RS232 OUTPUT 11 8 TTL INPUT RS232 OUTPUT 13 14 TTL OUTPUT RS232 INPUT 16 3 TTL OUTPUT RS232 INPUT 5k 30k 10 9 14 5 TTL OUTPUT RS232 INPUT TTL OUTPUT RS232 INPUT 5k 30k 2 + C1+ 1µF 12 7 4 C1– TTL OUTPUT RS232 INPUT + 5 C2+ V+ 3 1 V+ 30k 1µF 6 C2– V– 7 + 9 V– GND GND 1µF 1µF 16 + 10 LT1180A • TA04 11801afb 7

LT1180A/LT1181A PACKAGE DESCRIPTIOU J Package 16-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) 0.840 CORNER LEADS OPTION 0.005 (21.336) (4 PLCS) MAX (0.127) MIN 16 15 14 13 12 11 10 9 0.023 – 0.045 (0.584 – 1.143) 0.025 0.220 – 0.310 HALF LEAD OPTION (0.635) (5.588 – 7.874) RAD TYP 0.045 – 0.068 (1.143 – 1.727) FULL LEAD 1 2 3 4 5 6 7 8 OPTION 0.200 0.300 BSC (5.080) (0.762 BSC) MAX 0.015 – 0.060 (0.380 – 1.520) 0.008 – 0.018 0° – 15° (0.203 – 0.457) 0.045 – 0.065 0.125 0.100 (3.175) (1.143 – 1.651) (2.54) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE MIN 0.014 – 0.026 BSC OR TIN PLATE LEADS (0.360 – 0.660) J16 1298 J Package 18-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) 0.960 CORNER LEADS OPTION (24.384) (4 PLCS) 0.005 MAX (0.127) MIN 18 17 16 15 14 13 12 11 10 0.023 – 0.045 (0.584 – 1.143) HAOLPFT ILOENAD 0.025 (05..252900 –– 07..381700) 0.045 – 0.068 (0.635) RAD TYP (1.143 – 1.727) FULL LEAD OPTION 1 2 3 4 5 6 7 8 9 0.200 0.300 BSC (5.080) (0.762 BSC) MAX 0.015 – 0.060 (0.380 – 1.520) 0.008 – 0.018 0° – 15° (0.203 – 0.457) 0.125 0.045 – 0.065 0.100 (1.143 – 1.651) (2.54) (3.175) BSC NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE MIN 0.014 – 0.026 OR TIN PLATE LEADS (0.360 – 0.660) J18 1298 OBSOLETE PACKAGES 11801afb 8

LT1180A/LT1181A PACKAGE DESCRIPTIOU N Package 16-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.770* (19.558) MAX 16 15 14 13 12 11 10 9 0.255 – 0.015* (6.477 – 0.381) 1 2 3 4 5 6 7 8 0.300 – 0.325 0.130 – 0.005 0.045 – 0.065 (7.620 – 8.255) (3.302 – 0.127) (1.143 – 1.651) 0.020 (0.508) MIN 0.065 0.009 – 0.015 (1.651) (0.229 – 0.381) TYP +0.035 (0.325–0.015) 0.125 0.100 0.018 – 0.003 8.255+0.889 (3.175) (2.54) (0.457 – 0.076) –0.381 MIN BSC *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) N16 1098 N Package 18-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.900* (22.860) MAX 18 17 16 15 14 13 12 11 10 0.255 – 0.015* (6.477 – 0.381) 1 2 3 4 5 6 7 8 9 0.300 – 0.325 0.130 – 0.005 0.045 – 0.065 (7.620 – 8.255) (3.302 – 0.127) (1.143 – 1.651) 0.020 (0.508) MIN 0.065 0.009 – 0.015 (1.651) (0.229 – 0.381) TYP +0.035 (0.325–0.015) 0.125 0.005 0.100 0.018 – 0.003 8.255+0.889 (3.175) (0.127) (2.54) (0.457 – 0.076) –0.381 MIN MIN BSC *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) N18 1098 11801afb 9

LT1180A/LT1181A PACKAGE DESCRIPTIOU SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) 0.398 – 0.413* (10.109 – 10.490) 16 15 14 13 12 11 10 9 NOTE 1 0.394 – 0.419 (10.007 – 10.643) 1 2 3 4 5 6 7 8 0.291 – 0.299** (7.391 – 7.595) 0.093 – 0.104 0.037 – 0.045 0.010 – 0.029 · 45(cid:176) (2.362 – 2.642) (0.940 – 1.143) (0.254 – 0.737) 0° – 8° TYP 0.050 0.009 – 0.013 (1.270) 0.004 – 0.012 (0.229 – 0.330) NOTE 1 BSC (0.102 – 0.305) 0.014 – 0.019 0.016 – 0.050 (0.356 – 0.482) (0.406 – 1.270) TYP NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. S16 (WIDE) 1098 THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 11801afb 10

LT1180A/LT1181A PACKAGE DESCRIPTIOU SW Package 18-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) 0.447 – 0.463* (11.354 – 11.760) 18 17 16 15 14 13 12 11 10 NOTE 1 0.394 – 0.419 (10.007 – 10.643) 0.291 – 0.299** 1 2 3 4 5 6 7 8 9 (7.391 – 7.595) 0.093 – 0.104 0.037 – 0.045 0.010 – 0.029 · 45(cid:176) (2.362 – 2.642) (0.940 – 1.143) (0.254 – 0.737) 0° – 8° TYP 0.050 0.009 – 0.013 (1.270) 0.004 – 0.012 (0.229 – 0.330) NOTE 1 BSC (0.102 – 0.305) 0.014 – 0.019 0.016 – 0.050 (0.356 – 0.482) (0.406 – 1.270) TYP NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. S18 (WIDE) 1098 THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 11801afb 11 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LT1180A/LT1181A TYPICAL APPLICATIOU Operation Using 5V and 12V Power Supplies 2 17 12V INPUT 5V INPUT 4 3 LT1180A 5 7 + –12VOUT 0.1µF 0.1µF 6 + 12 15 RS232 OUTPUT LOGIC INPUTS 11 8 RS232 OUTPUT 13 14 RS232 INPUT 5k LOGIC OUTPUTS 10 9 RS232 INPUT 5k 18 16 ON/OFF LT1180A • TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1280A/LT1281A 5V 2-Driver/2-Receiver RS232 Transceivers Pin Compatible with LT1180A/LT1181A, I = 10mA Max CC LT1381 5V 2-Driver/2-Receiver RS232 Transceiver Narrow 16-Pin SO Package LT1780/LT1781 5V 2-Driver/2-Receiver RS232 Transceivers IEC 1000-4-2 Level 4 Compliance 11801afb 12 Linear Technology Corporation LT/CPI 11/01 REV B 1.5K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com ª LINEAR TECHNOLOGY CORPORATION 1994