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UM809TS

Public Unreviewed

by Ray

Union Semiconductor Supervisor and Reset ICs, SOT23-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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UM809TS

Union Semiconductor · Supervisor and Reset ICs · SOT23-3

UM809TS from Union Semiconductor, in a SOT23-3. 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 Device ground reference. Connect to system 0V.
2 RESET output Active-low, push-pull reset output. Driven low within 10µs when VCC falls below the reset threshold (3.08V typ for UM809TS) and held low for at least 140ms (240ms typ) after VCC rises above threshold. VOL ≤ 0.3V at ISINK=1.2mA; VOH ≥ 0.8×VCC at ISOURCE=500µA. Guaranteed valid down to VCC=1.0V (VOL ≤ 0.3V at ISINK=50µA).
3 VCC power_in Positive supply and monitored voltage. Operating range 1V to 10V; typical quiescent current 3µA at VCC=3V. Recommended 0.1µF bypass capacitor mounted as close as possible to the pin for transient immunity.

Key specifications

Parameter Value
Manufacturer Union Semiconductor
Package SOT23-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • UM809TS
  • UM809TP

CAD (KiCad official)

  • Symbol: UM809TS
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT23-3 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Union Semiconductor datasheet (14 pp, sha256 a8ef262a39510d83, 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