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SN75LBC172DWR

Public Made by Adom

by adom

Texas Instruments RS-485 / RS-422 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN75LBC172DWR

Texas Instruments · RS-485 / RS-422 ICs · SOIC-20-300mil

SN75LBC172DWR 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 1A input Driver 1 input.
2 1Y output Driver 1 output (non-inverting).
3 NC unconnected No internal connection.
4 1Z output Driver 1 inverted output.
5 G input Active high enable for all drivers.
6 2Z output Driver 2 inverted output.
7 NC unconnected No internal connection.
8 2Y output Driver 2 output (non-inverting).
9 2A input Driver 2 input.
10 GND power_in Ground pin; all voltages are referenced to GND, and the absolute maximum VCC is −0.3 V to 7 V.
11 3A input Driver 3 input.
12 3Y output Driver 3 output (non-inverting).
13 NC unconnected No internal connection.
14 3Z output Driver 3 inverted output.
15 G input Active low enable for all drivers.
16 4Z output Driver 4 inverted output.
17 NC unconnected No internal connection.
18 4Y output Driver 4 output (non-inverting).
19 4A input Driver 4 input.
20 VCC power_in Power pin; recommended supply voltage is 4.75 V to 5.25 V (5 V nominal).

Key specifications

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

CAD (KiCad official)

  • Symbol: SN75LBC172DWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn75lbc172dwr-etched.step / sn75lbc172dwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75lbc172dwr.step / sn75lbc172dwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (23 pp, sha256 1b77235f28012611, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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