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SN75ALS172ADWR

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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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SN75ALS172ADWR

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

SN75ALS172ADWR 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; the logic level on this pin sets the driver 1 outputs 1Y and 1Z when the drivers are enabled.
2 1Y output Driver 1 non-inverted differential output, which is high-impedance when the drivers are disabled.
3 NC unconnected No internal connection on the DW package.
4 1Z output Driver 1 inverted differential output, which is high-impedance when the drivers are disabled.
5 G input Active-high enable for all drivers; the outputs are high-impedance when G is low and the active-low enable G is inactive.
6 2Z output Driver 2 inverted differential output, which is high-impedance when the drivers are disabled.
7 NC unconnected No internal connection on the DW package.
8 2Y output Driver 2 non-inverted differential output, which is high-impedance when the drivers are disabled.
9 2A input Driver 2 input; the logic level on this pin sets the driver 2 outputs 2Y and 2Z when the drivers are enabled.
10 GND power_in Ground pin for the device; all voltage limits are referenced to network ground.
11 3A input Driver 3 input; the logic level on this pin sets the driver 3 outputs 3Y and 3Z when the drivers are enabled.
12 3Y output Driver 3 non-inverted differential output, which is high-impedance when the drivers are disabled.
13 NC unconnected No internal connection on the DW package.
14 3Z output Driver 3 inverted differential output, which is high-impedance when the drivers are disabled.
15 G input Active-low enable for all drivers (printed with an overbar in the datasheet); the outputs are enabled when this pin is low together with the active-high enable G.
16 4Z output Driver 4 inverted differential output, which is high-impedance when the drivers are disabled.
17 NC unconnected No internal connection on the DW package.
18 4Y output Driver 4 non-inverted differential output, which is high-impedance when the drivers are disabled.
19 4A input Driver 4 input; the logic level on this pin sets the driver 4 outputs 4Y and 4Z when the drivers are enabled.
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: SN75ALS172ADWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn75als172adwr-etched.step / sn75als172adwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75als172adwr.step / sn75als172adwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (19 pp, sha256 7aced5ec4e5ab4bd, 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