component
ST485ABDR
Public Made by Adomby adom
STMicroelectronics RS-485 / RS-422 ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownST485ABDR
STMicroelectronics · RS-485 / RS-422 ICs · SOIC-8
ST485ABDR from STMicroelectronics, 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 | RO | tri_state | Receiver output; logic high when A-B exceeds 200 mV, logic low when A-B is below -200 mV; high impedance output when RE is high. |
| 2 | RE | input | Receiver output enable, active low; RO enabled when RE is low; device enters low power shutdown when RE is high and DE is low. |
| 3 | DE | input | Driver output enable, active high; driver outputs A and B enabled when DE is high; device enters low power shutdown when RE is high and DE is low. |
| 4 | DI | input | Driver input; low input forces A low and B high; high input forces A high and B low. |
| 5 | GND | power_in | Ground. |
| 6 | A | bidirectional | Non-inverting driver output and receiver input; receiver input impedance 12-24 kΩ; accepts -7 to 12 V common mode; active driver output when DE is high, high impedance when DE is low. |
| 7 | B | bidirectional | Inverting driver output and receiver input; receiver input impedance 12-24 kΩ; accepts -7 to 12 V common mode; active driver output when DE is high, high impedance when DE is low. |
| 8 | VCC | power_in | Supply voltage; operates from 4.75 V to 5.25 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
ST485ABDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
st485abdr-etched.step/st485abdr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st485abdr.step/st485abdr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (19 pp, sha256
472bf002205c3749, retrieved 2026-10-06, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).