ST3232B, ST3232C 3 to 5.5 V, low-power, up to 400 kbs RS-232 drivers and receivers Datasheet - production data The ST3232B and ST3232C have two receivers and two drivers. The devices are guaranteed to run at data rates of 250 kbps while maintaining RS-232 output levels. Typical applications are notebooks, subnotebooks and palmtop computers, battery- powered equipment, hand-held equipment, peripherals, and printers. Table 1: Device summary Order code Temp. range Package Packaging ST3232CDR 0 to 70 °C SO16 2500 parts (tape and ST3232BDR -40 to 85 °C per reel reel) Features ST3232CWR 0 to 70 °C SO16L 1000 parts 300 µA supply current (tape and 300 kbps minimum guaranteed data rate ST3232BWR -40 to 85 °C reel) per reel 6 V/µs minimum guaranteed slew rate ST3232CTR 0 to 70 °C TSSOP16 Meets EIA/TIA-232 specifications down 2500 parts (tape and to 3 V ST3232BTR -40 to 85 °C reel) per reel Available in SO16, SO16L, and TSSOP16 packages Description The ST3232B and ST3232C devices are 3 V powered EIA/TIA-232 and V.28/V.24 communication interfaces with low power requirements and high data-rate capabilities. These devices have a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5.5 V supplies. The devices require only four small 0.1 mF standard external capacitors for operation from a 3 V supply. January 2016 DocID7454 Rev 12 1/18 This is information on a product in full production. www.st.com

Contents ST3232B, ST3232C Contents 1 Pin configuration ............................................................................. 3 2 Absolute maximum ratings ............................................................. 4 3 Electrical characteristics ................................................................ 5 4 Application information .................................................................. 7 5 Typical performance characteristics ............................................. 8 6 Package information ..................................................................... 10 6.1 SO16 package information .............................................................. 11 6.2 SO16L package information ............................................................ 12 6.3 TSSOP16 package information ....................................................... 13 6.4 SO16 tape and reel package information ........................................ 14 6.5 SO16L tape and reel package information ...................................... 15 6.6 TSSOP16 tape and reel package information ................................. 16 7 Revision history ............................................................................ 17 2/18 DocID7454 Rev 12

ST3232B, ST3232C Pin configuration 1 Pin configuration Figure 1: Pin connections Table 2: Pin description Pin n° Symbol Name and function 1 C + Positive terminal for the first charge pump capacitor 1 2 V+ Doubled voltage terminal 3 C - Negative terminal for the first charge pump capacitor 1 4 C + Positive terminal for the second charge pump capacitor 2 5 C - Negative terminal for the second charge pump capacitor 2 6 V- Inverted voltage terminal 7 T2 Second transmitter output voltage OUT 8 R2 Second receiver input voltage IN 9 R2 Second receiver output voltage OUT 10 T2 Second transmitter input voltage IN 11 T1 First transmitter input voltage IN 12 R1 First receiver output voltage OUT 13 R1 First receiver input voltage IN 14 T1 First transmitter output voltage OUT 15 GND Ground 16 V Supply voltage CC DocID7454 Rev 12 3/18

Absolute maximum ratings ST3232B, ST3232C 2 Absolute maximum ratings Table 3: Absolute maximum ratings Symbol Parameter Value Unit V Supply voltage -0.3 to 6 CC V+ Doubled voltage terminal (V - 0.3) to 7 CC V- Inverted voltage terminal 0.3 to -7 V+ + |V-| 13 V T Transmitter input voltage range -0.3 to 6 IN R Receiver input voltage range ±25 IN T Transmitter output voltage range ±13.2 OUT R Receiver output voltage range -0.3 to (V + 0.3) OUT CC t Transmitter output short to gnd time Continuous SHORT T Storage temperature -65 to 150 °C stg Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute addition can not exceed 13 V. Running on internal charge pump, intrinsic self limitation allows exceeding those values without any damage. Startup voltage sequence (V , then V+, then V-) is critical, therefore it is not CC recommended to use this device using externally applied voltage to V+ and V-. 4/18 DocID7454 Rev 12

ST3232B, ST3232C Electrical characteristics 3 Electrical characteristics Table 4: Electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit No load, V = 3 V ± 10 %, T = 25 °C 0.3 1 CC A I V power supply current mA SUPPLY CC No load, V = 5 V ± 10 %, T = 25 °C 1 2 CC A Table 5: Logic input (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit V Input logic threshold low T-IN (1) 0.8 TIL V = 3.3 V 2 V CC V Input logic threshold high TIH V = 5 V 2.4 CC I Input leakage current T-IN ±0.01 ±1 µA IL Notes: (1)Transmitter input hysteresis is typically 250 mV. Table 6: Transmitter (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit All transmitter outputs are loaded with 3 kΩ V Output voltage swing ±5 ±5.4 V TOUT to GND Transmitter output 10 R V = V+ = V- = 0 V, V = ±2 V 300 Ω TOUT resistance CC OUT M I Output short circuit current V = 3 V or 5 V, V = ±12 ± 60 mA TSC CC OUT Table 7: Receiver (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit V Receiver input voltage operating range -25 25 RIN T = 25 °C, V = 3.3 V 0.6 1.1 A CC V RS-232 Input threshold low RIL T = 25 °C, V = 5 V 0.8 1.5 A CC V T = 25 °C, V = 3.3 V 1.5 2.4 A CC V RS-232 Input threshold high RIH T = 25 °C, V = 5 V 1.8 2.4 A CC V Input hysteresis 0.3 RIHYS R Input resistance T = 25 °C 3 5 7 kΩ RIN A V TTL/CMOS output voltage low I = 1.6 mA 0.4 ROL OUT V V TTL/CMOS output voltage high I = -1 mA V - 0.6 V - 0.1 ROH OUT CC CC DocID7454 Rev 12 5/18

Electrical characteristics ST3232B, ST3232C Table 8: Timing characteristics (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit R = 3 kΩ, C = 1000 pF one transmitter D Data transfer rate L L2 300 400 kbps R switching t , Propagation delay input PHLR R = R , C = 150 pF 0.2 µs tPLHR to output XIN XOUT L |t - Transmitter propagation PHLT See (1) 100 tTHL| delay difference ns |t - Receiver propagation PHLR 50 tTHR| delay difference T = 25 °C, R = 3 kΩ to 7 kΩ, V = 3.3 V A L CC measured from 3 V to -3 V or -3 V to 3 V, 6 30 C = 150 pF to 1000 pF L S Transition slew rate V/µs RT T = 25 °C, R = 3 kΩ to 7 kΩ, V = 3.3 V A L CC measured from 3 V to -3 V or -3 V to 3 V, 4 30 C = 150 pF to 2500 pF L Notes: (1)Transmitter skew is measured at the transmitter zero cross points 6/18 DocID7454 Rev 12

ST3232B, ST3232C Application information 4 Application information Figure 2: Application circuits Table 9: Capacitance value (µF) V C1 C2 C3 C4 Cbypass CC 3.0 to 3.6 0.1 0.1 0.1 0.1 0.1 4.5 to 5.5 0.047 0.33 0.33 0.33 0.33 DocID7454 Rev 12 7/18

Typical performance characteristics ST3232B, ST3232C 5 Typical performance characteristics Unless otherwise specified T = 25 °C J Figure 3: Driver voltage transfer characteristics for Figure 4: Driver voltage transfer characteristics for transmitter inputs receiver inputs Figure 5: Output current vs output low voltage Figure 6: Output current vs output low voltage at VCC = 5.5 V at VCC = 3 V 8/18 DocID7454 Rev 12

ST3232B, ST3232C Typical performance characteristics Figure 7: Output current vs output high voltage Figure 8: Output current vs output high voltage at VCC = 5.5 V at VCC = 3 V Figure 9: Receiver input resistance DocID7454 Rev 12 9/18

Package information ST3232B, ST3232C 6 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 10/18 DocID7454 Rev 12

ST3232B, ST3232C Package information 6.1 SO16 package information Figure 10: SO16 package outline Table 10: SO16 mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max Min. Typ. Max. A 1.75 0.068 a1 0.1 0.25 0.004 0.010 a2 1.64 0.063 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45 ° 45 ° D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M 0.62 0.024 S 8 ° 8 ° DocID7454 Rev 12 11/18

Package information ST3232B, ST3232C 6.2 SO16L package information Figure 11: SO16L package outline Table 11: SO16L mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max Min. Typ. Max. A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.02 C 0.23 0.32 0.009 0.013 D 10.1 10.5 0.398 0.413 E 7.4 7.6 0.291 0.299 e 1.27 0.05 H 10 10.65 0.394 0.419 h 0.25 0.75 0.01 0.03 L 0.4 1.27 0.016 0.05 k 0 ° 8 ° 0 ° 8 ° ddd 0.1 0.004 12/18 DocID7454 Rev 12

ST3232B, ST3232C Package information 6.3 TSSOP16 package information Figure 12: TSSOP16 package outline Table 12: TSSOP16 mechanical data Dimensions Ref Millimeters Inches Min Typ Max Min Typ Max A 1.20 0.047 A1 0.05 0.15 0.002 0.006 A2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 D 4.90 5.00 5.10 0.193 0.197 0.201 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 0.026 k 0° 8° 0° 8° L 0.45 0.60 0.75 0.018 0.024 0.030 L1 1.00 0.039 aaa 0.10 0.004 DocID7454 Rev 12 13/18

Package information ST3232B, ST3232C 6.4 SO16 tape and reel package information Figure 13: SO16 tape and reel package outline 1. Drawing not to scale Table 13: SO16 tape and reel mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max Min. Typ. Max. A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 — — Ao 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 14/18 DocID7454 Rev 12

ST3232B, ST3232C Package information 6.5 SO16L tape and reel package information Figure 14: SO16L tape and reel package outline 1. Drawing not to scale Table 14: SO16L tape and reel mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max Min. Typ. Max. A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 — — Ao 10.8 11.0 0.425 0.433 Bo 10.7 10.9 0.421 0.429 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 DocID7454 Rev 12 15/18

Package information ST3232B, ST3232C 6.6 TSSOP16 tape and reel package information Figure 15: TSSOP16 tape and reel package outline 1. Drawing not to scale Table 15: TSSOP16 tape and reel mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max Min. Typ. Max. A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 — — Ao 6.7 6.9 0.264 0.272 Bo 5.3 5.5 0.209 0.217 Ko 1.6 1.8 0.063 0.071 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 16/18 DocID7454 Rev 12

ST3232B, ST3232C Revision history 7 Revision history Table 16: Document revision history Date Revision Changes 06-Sep-2006 8 Order codes has been updated and new template. 25-Oct-2006 9 Order codes has been updated. 21-Jan-2008 10 Added note on Table 3. 08-Feb-2008 11 Modified: Table 1 on page 1. Updated document layout Table 3: "Absolute maximum ratings": added T stg Updated titles of Figure 5, Figure 6, Figure 7, and Figure 8 25-Jan-2016 12 Section 6.2: replaced SO16L package outline and mechanical data Section 6.3: removed A1 (typ: inches), updated E1 (max: mm and inches), added L1 and aaa. DocID7454 Rev 12 17/18

ST3232B, ST3232C IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved 18/18 DocID7454 Rev 12