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SN75ALS170ADWR

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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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SN75ALS170ADWR

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

SN75ALS170ADWR 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 1D input Channel 1 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 1A/1B when 1DIR is high.
2 1DIR input Channel 1 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V.
3 NC unconnected No internal connection.
4 GND power_in Network ground terminal; all voltages except the differential bus voltage are referenced to this pin.
5 NC unconnected No internal connection.
6 2D input Channel 2 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 2A/2B when 2DIR is high.
7 2DIR input Channel 2 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V.
8 NC unconnected No internal connection.
9 3D input Channel 3 driver data input, with VIH at least 2 V and VIL at most 0.8 V; it drives bus port 3A/3B when 3DIR is high.
10 3DIR input Channel 3 direction control: high enables the driver and disables the receiver output, low puts the driver outputs in high impedance and enables the receiver; VIH at least 2 V and VIL at most 0.8 V.
11 NC unconnected No internal connection.
12 3A bidirectional Noninverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode.
13 3B bidirectional Inverting differential bus I/O terminal of channel 3; bus terminal voltage range is -7 V to 12 V, common mode.
14 2A bidirectional Noninverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode.
15 2B bidirectional Inverting differential bus I/O terminal of channel 2; bus terminal voltage range is -7 V to 12 V, common mode.
16 VCC power_in Single 5-V supply; recommended range 4.75 V to 5.25 V.
17 NC unconnected No internal connection.
18 NC unconnected No internal connection.
19 1A bidirectional Noninverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode.
20 1B bidirectional Inverting differential bus I/O terminal of channel 1; bus terminal voltage range is -7 V to 12 V, common mode.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN75ALS170ADWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn75als170adwr-etched.step / sn75als170adwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75als170adwr.step / sn75als170adwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (23 pp, sha256 ab79641101b890f9, retrieved 2026-10-08, 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