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SN75ALS191DR

Public Made by Adom

by adom

Texas Instruments RS-485/RS-422 ICs, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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SN75ALS191DR

Texas Instruments · RS-485/RS-422 ICs · SOIC-8

SN75ALS191DR from Texas Instruments, in a SOIC-8. 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 VCC power_in 5V power supply positive terminal (VCC, 4.75V-5.25V). Typical supply current ICC = 32 mA (all drivers, no load).
2 1A input Single-ended TTL/CMOS data input for differential driver channel 1. VIH ≥ 2V, VIL ≤ 0.8V.
3 2A input Single-ended TTL/CMOS data input for differential driver channel 2. VIH ≥ 2V, VIL ≤ 0.8V.
4 GND power_in Device ground reference terminal.
5 2Z output Inverting differential output for channel 2 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA;
6 2Y output Non-inverting differential output for channel 2 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA;
7 1Z output Inverting differential output for channel 1 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA;
8 1Y output Non-inverting differential output for channel 1 (ANSI EIA/TIA-422-B compliant). IOH = -50 mA, IOL = 50 mA;

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Comm/UART
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • SN75ALS191DRD
  • SN75ALS191DR
  • SN75ALS191DRP
  • SN75ALS191DRN
  • SN75ALS191DRPS

CAD (KiCad official)

  • Symbol: SN75ALS191DR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: sn75als191dr-etched.step / sn75als191dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75als191dr.step / sn75als191dr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (20 pp, sha256 d75efd66a05d6ce1, 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