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HX809M-4.38V

Public Made by Adom

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HX hengjiaxing HX809M 4 38V Supervisor and Reset ICs, SOT-23. 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 hx809m-4-38v: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
hx809m-4-38v-etched.fit.json hx809m-4-38v: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
hx809m-4-38v-etched.glb hx809m-4-38v: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
hx809m-4-38v-etched.step hx809m-4-38v: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
hx809m-4-38v.glb Publish 0.1.0 · Ray
hx809m-4-38v.kicad_mod Publish 0.1.0 · Ray
hx809m-4-38v.kicad_sym Publish 0.1.0 · Ray
hx809m-4-38v.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
hx809m-4-38v.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json hx809m-4-38v: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md hx809m-4-38v: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

HX809M-4.38V

HX hengjiaxing · Supervisor and Reset ICs · SOT-23

HX809M-4.38V from HX hengjiaxing, 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 (0 V). Connect to system ground.
2 RESET output Active-low reset output. Driven low when VCC falls below the 4.38V (±2%) threshold and held low for the 350 ms (typ) reset delay after VCC recovers. VOL ≤ 0.4V at ISINK=3.2 mA; VOH ≥ VCC-1.5V at ISOURCE=800 µA (L/M/J variants). Max output current 20 mA.
3 VCC power_in Chip supply / monitored input voltage. Operating range 0.9V-6.0V (absolute max 6V). The internal comparator trips RESET when VCC drops below 4.38V (±2%). Has VCC transient noise immunity.

Key specifications

Parameter Value
Manufacturer HX hengjiaxing
Package SOT-23
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: HX809M-4.38V
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: hx809m-4-38v-etched.step / hx809m-4-38v-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hx809m-4-38v.step / hx809m-4-38v.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
hx809m-4-38v.step 59 KB You want the bare part, or you mark your own boards.
hx809m-4-38v-etched.step 2.1 MB You want the part with HX809M-4.38V already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 516 faces against 69 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: HX hengjiaxing datasheet (4 pp, sha256 4867890d2eebb1ee, 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