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DS8921ATMX

Public Made by Adom

by adom

Texas Instruments RS-485 / RS-422 ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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DS8921ATMX

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

DS8921ATMX from Texas Instruments, in a SOIC-8. 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 VCC power_in Power supply pin; rated 5 V with operating range 4.5 to 5.5 V
2 RO output Receiver output pin; TTL-compatible with VOH = 2.5 V minimum, VOL = 0.5 V maximum
3 DI input TTL/CMOS-compatible driver input; VIH = 2.0 V, VIL = 0.8 V
4 GND power_in Power ground pin
5 DO- output Inverting differential driver output; VOH = 2.5 V minimum, VOL = 0.5 V maximum
6 DO+ output Non-inverting differential driver output; VOH = 2.5 V minimum, VOL = 0.5 V maximum
7 RI- input Inverting differential receiver input; ±200 mV sensitivity over ±7 V common-mode range
8 RI+ input Non-inverting differential receiver input; ±200 mV sensitivity over ±7 V common-mode range

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Interface
Pins 8

CAD (KiCad official)

  • Symbol: DS8921ATMX
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ds8921atmx-etched.step / ds8921atmx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ds8921atmx.step / ds8921atmx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (22 pp, sha256 0be14ebc915d205b, retrieved 2026-09-24, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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