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SN75ALS172ADWR
Public Made by Adomby adom
Texas Instruments RS-485 / RS-422 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN75ALS172ADWR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn75als172adwr.step/sn75als172adwr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).