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ST485EXDR

Public Made by Adom

by adom

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

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ST485EXDR

STMicroelectronics · RS-485 / RS-422 ICs · SO-8

ST485EXDR 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: with RE low it goes high when A-B ≥ +0.2 V and low when A-B ≤ -0.2 V, and it is high impedance when RE is high and DE is low (Table 4).
2 RE input Receiver output enable: the receiver is active when RE is low and RO is placed in high impedance when RE is high (Table 4); control input limits VIH 2.0 V min and VIL 0.8 V max (Table 7).
3 DE input Driver output enable: the driver outputs A and B are active when DE is high and go high impedance when DE is low (Table 3); control input limits VIH 2.0 V min and VIL 0.8 V max (Table 7).
4 DI input Driver input: with DE high, DI high drives A high and B low and DI low drives A low and B high (Table 3); input limits VIH 2.0 V min and VIL 0.8 V max (Table 7).
5 GND power_in Device ground; all voltages are referenced to this pin (Table 7 footnote 1).
6 A bidirectional Non-inverting receiver input and non-inverting driver output; receiver common-mode range is -7 V to 12 V and voltage rating is ±14 V (Tables 5 and 7).
7 B bidirectional Inverting receiver input and inverting driver output; receiver common-mode range is -7 V to 12 V and voltage rating is ±14 V (Tables 5 and 7).
8 VCC power_in Supply voltage: specified for 5 V ±5% operation, with an absolute maximum of 7 V (Tables 5 and 6).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-8
Category Interface
Pins 8

CAD (KiCad official)

  • Symbol: ST485EXDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: st485exdr-etched.step / st485exdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); st485exdr.step / st485exdr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (18 pp, sha256 fc67af9e126732a1, retrieved 2026-10-10, 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