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ADM485ARZ

Public Made by Adom

by adom

UMW RS-485 / RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs adm485arz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
adm485arz-etched.fit.json adm485arz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
adm485arz-etched.glb adm485arz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
adm485arz-etched.step adm485arz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
adm485arz.glb Publish 0.1.0 · Ray 2mo ago
adm485arz.kicad_mod Publish 0.1.0 · Ray 2mo ago
adm485arz.kicad_sym Publish 0.1.0 · Ray 2mo ago
adm485arz.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
adm485arz.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json adm485arz: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md adm485arz: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

ADM485ARZ

UMW · RS-485 / RS-422 ICs · SOP-8

ADM485ARZ from UMW, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RO output Receiver Output. CMOS logic output driven from the A/B differential inputs. Outputs logic HIGH when (A-B) >= +0.2V, LOW when (A-B) <= -0.2V, and HIGH when the differential inputs are open (fail-safe). Goes to high-impedance when RE is HIGH. VOH >= 3.5V @ -4mA, VOL <= 0.4V @ 4mA.
2 RE input Receiver Output Enable, active LOW. When LOW the receiver output RO is enabled; when HIGH RO is placed in high-impedance (three-state). CMOS-compatible input, VIH >= 2V, VIL <= 0.8V, IIN <= +/-2 uA.
3 DE input Driver Output Enable, active HIGH. When HIGH the differential driver outputs A and B are enabled; when LOW they are placed in high-impedance (three-state). CMOS-compatible input, VIH >= 2V, VIL <= 0.8V, IIN <= +/-2 uA.
4 DI input Driver Input. CMOS logic input; a HIGH on DI drives A HIGH and B LOW, a LOW on DI drives A LOW and B HIGH (when DE is HIGH). VIH >= 2V, VIL <= 0.8V, IIN <= +/-2 uA.
5 GND power_in Ground reference (0V) for all signals and the supply.
6 A bidirectional Non-inverting differential bus I/O. Driver non-inverting output when DE is HIGH; receiver non-inverting input when DE is LOW. Common-mode range -7V to +12V, input resistance >= 12 kOhm, driver differential output >= 1.5V into 27 Ohm (RS-485).
7 B bidirectional Inverting differential bus I/O. Driver inverting output when DE is HIGH; receiver inverting input when DE is LOW. Common-mode range -7V to +12V, input resistance >= 12 kOhm.
8 VCC power_in Positive supply input, +5V nominal (4.75V to 5.25V). Supply current typ. 1 mA (outputs enabled), 0.6 mA (outputs disabled), 2.2 mA max.

Key specifications

Parameter Value
Manufacturer UMW
Package SOP-8
Category Interface
Pins 8

Ordering variants

  • ADM485ARZ

CAD (KiCad official)

  • Symbol: ADM485ARZ
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: adm485arz-etched.step / adm485arz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adm485arz.step / adm485arz.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
adm485arz.step 122 KB You want the bare part, or you mark your own boards.
adm485arz-etched.step 1.8 MB You want the part with ADM485ARZ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 465 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: UMW datasheet (9 pp, sha256 9d70c6bbd515fd15, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF