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SN75185DWR

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Texas Instruments RS232 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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SN75185DWR

Texas Instruments · RS232 ICs · SOIC-20-300mil

SN75185DWR from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VDD power_in Positive driver supply, recommended 7.5 V to 15 V (9 V nominal), absolute maximum 15 V.
2 RA1 input Receiver 1 RS-232 input, withstands ±30 V, with about 1.9 V typical positive-going threshold and 0.5 V minimum hysteresis; output is RY1.
3 RA2 input Receiver 2 RS-232 input, withstands ±30 V, with about 1.9 V typical positive-going threshold and 0.5 V minimum hysteresis; output is RY2.
4 RA3 input Receiver 3 RS-232 input, withstands ±30 V, with about 1.9 V typical positive-going threshold and 0.5 V minimum hysteresis; output is RY3.
5 DY1 output Driver 1 RS-232 output, swings between VDD and VSS levels, ±6 V minimum into 3 kΩ, tolerates ±15 V; input is DA1.
6 DY2 output Driver 2 RS-232 output, swings between VDD and VSS levels, ±6 V minimum into 3 kΩ, tolerates ±15 V; input is DA2.
7 RA4 input Receiver 4 RS-232 input, withstands ±30 V, with about 1.9 V typical positive-going threshold and 0.5 V minimum hysteresis; output is RY4.
8 DY3 output Driver 3 RS-232 output, swings between VDD and VSS levels, ±6 V minimum into 3 kΩ, tolerates ±15 V; input is DA3.
9 RA5 input Receiver 5 RS-232 input, withstands ±30 V, with about 1.9 V typical positive-going threshold and 0.5 V minimum hysteresis; output is RY5.
10 VSS power_in Negative driver supply, recommended -7.5 V to -15 V (-9 V nominal), absolute maximum -15 V.
11 GND power_in Ground reference for all logic and supply voltages.
12 RY5 output Receiver 5 logic output at VCC levels, high-level output current up to -0.5 mA and low-level output current up to 16 mA; input is RA5.
13 DA3 input Driver 3 logic input, VIH minimum 1.9 V and VIL maximum 0.8 V; drives DY3.
14 RY4 output Receiver 4 logic output at VCC levels, high-level output current up to -0.5 mA and low-level output current up to 16 mA; input is RA4.
15 DA2 input Driver 2 logic input, VIH minimum 1.9 V and VIL maximum 0.8 V; drives DY2.
16 DA1 input Driver 1 logic input, VIH minimum 1.9 V and VIL maximum 0.8 V; drives DY1.
17 RY3 output Receiver 3 logic output at VCC levels, high-level output current up to -0.5 mA and low-level output current up to 16 mA; input is RA3.
18 RY2 output Receiver 2 logic output at VCC levels, high-level output current up to -0.5 mA and low-level output current up to 16 mA; input is RA2.
19 RY1 output Receiver 1 logic output at VCC levels, high-level output current up to -0.5 mA and low-level output current up to 16 mA; input is RA1.
20 VCC power_in Logic supply, recommended 4.5 V to 5.5 V (5 V nominal), absolute maximum 10 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-300mil
Category Interface
Pins 20

CAD (KiCad official)

  • Symbol: SN75185DWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn75185dwr-etched.step / sn75185dwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75185dwr.step / sn75185dwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 d50de2df0cba2af7, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF