component

UM805RE

Public Made by Adom

by adom

Union Semiconductor Supervisor And Reset ICs, SOT-143-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs um805re: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers um805re: viewers · Ray 1mo ago
package.json um805re: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json um805re: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md Initial commit: component/um805re · Ray 1mo ago
um805re-etched.fit.json um805re: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
um805re-etched.glb um805re: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
um805re-etched.step um805re: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
um805re.glb Publish 0.1.0 · Ray 1mo ago
um805re.kicad_mod Publish 0.1.0 · Ray 1mo ago
um805re.kicad_sym Publish 0.1.0 · Ray 1mo ago
um805re.lbr Publish 0.1.0 · Ray 1mo ago
um805re.step Publish 0.1.0 · Ray 1mo ago

UM805RE

Union Semiconductor · Supervisor And Reset ICs · SOT-143-4

UM805RE from Union Semiconductor, in a SOT-143-4. 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 GND power_in Ground reference.
2 RESET tri_state Open-drain active-low output that remains low while VCC is below 2.63V or MR is held low, continues low for at least 140ms after reset conditions terminate, and requires external pull-up resistor to any supply up to 6V.
3 MR input Active-low manual reset input with internal 20kΩ pull-up resistor; asserts reset when held low and maintains reset for 240ms after returning high.
4 VCC power_in Supply voltage input rated for 1.0V to 5.5V operation.

Key specifications

Parameter Value
Manufacturer Union Semiconductor
Package SOT-143-4
Category Power Management (PMIC)
Pins 4

CAD (KiCad official)

  • Symbol: UM805RE
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143-4 (KiCad packages3D, STEP)
  • 3D model files: um805re-etched.step / um805re-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); um805re.step / um805re.glb are the bare package body.

Provenance

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

  • Datasheet: Union Semiconductor datasheet (14 pp, sha256 2765d38a175c536c, retrieved 2026-09-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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