component
ST485ECDR
Public Made by Adomby adom
STMicroelectronics RS-485 / RS-422 ICs, SO-8. 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
markdownST485ECDR
STMicroelectronics · RS-485 / RS-422 ICs · SO-8
ST485ECDR from STMicroelectronics, in a SO-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 | output | Receiver output, provides the TTL/CMOS logic level output of the received RS-485 differential signal. |
| 2 | RE | input | Receiver output enable, active low control input; when low, receiver is enabled and RO follows the differential input voltage A-B. |
| 3 | DE | input | Driver output enable, active high control input; when high, driver outputs A and B are enabled on the bus. |
| 4 | DI | input | Driver input, accepts TTL/CMOS logic level data input for the differential driver outputs A and B. |
| 5 | GND | power_in | Ground, reference and return path for supply current. |
| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output, differential bus line for RS-485/RS-422 communication. |
| 7 | B | bidirectional | Inverting receiver input and inverting driver output, differential bus line for RS-485/RS-422 communication. |
| 8 | VCC | power_in | Supply voltage, operates from single 5 V ± 5 % supply with maximum 7 V absolute rating. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Interface |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
ST485ECDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
st485ecdr-etched.step/st485ecdr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st485ecdr.step/st485ecdr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (18 pp, sha256
fc67af9e126732a1, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).