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HG809LM3

Public Made by Adom

by adom

HGSEMI Supervisor and Reset ICs, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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HG809LM3

HGSEMI · Supervisor and Reset ICs · SOT-23

HG809LM3 from HGSEMI, in a SOT-23. 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 Chip ground reference. Connect to the system ground plane.
2 RESET output Active-low reset output (RESET with overbar). Asserts low (VOL <= 0.3 V at ISINK=1.2 mA) when VCC drops below the reset threshold Vth (nominally 4.63 V for HG809LM3) and stays low for the ~200 ms typical power-up reset delay (Trp = 80-350 ms) after VCC returns above threshold. Drives high (VOH >= 0.8*VCC at ISOURCE=500 uA) during normal operation.
3 VCC power_in Chip supply input. Operating range 1.0 V to 6.0 V (absolute max 6.5 V); the monitored supply whose voltage is compared against the internal reset threshold Vth.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • HG809LM3/TR

CAD (KiCad official)

  • Symbol: HG809LM3
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: hg809lm3-etched.step / hg809lm3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hg809lm3.step / hg809lm3.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (6 pp, sha256 4dd29334cac9e274, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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