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ST3232CDR

Public Made by Adom

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STMicroelectronics RS232 ICs, SOIC-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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ST3232CDR

STMicroelectronics · RS232 ICs · SOIC-16

ST3232CDR from STMicroelectronics, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 C1+ passive Positive terminal for the first charge pump capacitor. Connect C1 (typ. 0.1 µF at 3 V, 0.047 µF at 5 V) between C1+ and C1-.
2 V+ power_out Doubled (positive) voltage terminal generated by the charge pump (approx. +2 x VCC). Requires reservoir capacitor C3 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) to GND.
3 C1- passive Negative terminal for the first charge pump capacitor. Connect C1 between C1+ (pin 1) and C1- (pin 3).
4 C2+ passive Positive terminal for the second charge pump capacitor. Connect C2 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) between C2+ and C2-.
5 C2- passive Negative terminal for the second charge pump capacitor. Connect C2 between C2+ (pin 4) and C2- (pin 5).
6 V- power_out Inverted (negative) voltage terminal generated by the charge pump inverter (approx. -2 x VCC). Requires reservoir capacitor C4 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) to GND. Absolute max 0.3 to -7 V.
7 T2OUT output Second transmitter (driver) RS-232 output. Output voltage swing typ. +/-5.4 V into 3 kOhm load; short-circuit current +/-60 mA max.
8 R2IN input Second receiver RS-232 input. Operating input range +/-25 V; input resistance 3-7 kOhm (typ. 5 kOhm); thresholds VRIL 0.6-1.5 V, VRIH up to 2.4 V.
9 R2OUT output Second receiver TTL/CMOS output. VOL <= 0.4 V at IOUT = 1.6 mA; VOH >= VCC-0.6 V at IOUT = -1 mA.
10 T2IN input Second transmitter (driver) TTL/CMOS input. VIL <= 0.8 V, VIH >= 2 V (VCC = 3.3 V) or 2.4 V (VCC = 5 V); typical input hysteresis 250 mV.
11 T1IN input First transmitter (driver) TTL/CMOS input. VIL <= 0.8 V, VIH >= 2 V (VCC = 3.3 V) or 2.4 V (VCC = 5 V); typical input hysteresis 250 mV.
12 R1OUT output First receiver TTL/CMOS output. VOL <= 0.4 V at IOUT = 1.6 mA; VOH >= VCC-0.6 V at IOUT = -1 mA.
13 R1IN input First receiver RS-232 input. Operating input range +/-25 V; input resistance 3-7 kOhm (typ. 5 kOhm); thresholds VRIL 0.6-1.5 V, VRIH up to 2.4 V.
14 T1OUT output First transmitter (driver) RS-232 output. Output voltage swing typ. +/-5.4 V into 3 kOhm load; short-circuit current +/-60 mA max.
15 GND power_in Ground reference for all supply, logic and RS-232 signals.
16 VCC power_in Positive supply voltage, 3.0 to 5.5 V operating (absolute max -0.3 to 6 V). Supply current typ. 0.3 mA at 3 V, 1 mA at 5 V (no load). Decouple with Cbypass to GND (0.1 µF at 3 V, 0.33 µF at 5 V).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOIC-16
Category Interface
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • ST3232CDR
  • ST3232BDR
  • ST3232CWR
  • ST3232BWR
  • ST3232CTR
  • ST3232BTR

CAD (KiCad official)

  • Symbol: ST3232CDR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: st3232cdr-etched.step / st3232cdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); st3232cdr.step / st3232cdr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (18 pp, sha256 38bf6fa5becf1b1f, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF