component

STM811SW16F

Public Made by Adom

by adom

STMicroelectronics Supervisor and Reset ICs, SOT-143. Pinout extracted from 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 stm811sw16f: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json stm811sw16f: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 23h ago
README.md stm811sw16f: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 16d ago
stm811sw16f-etched.fit.json stm811sw16f: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
stm811sw16f-etched.glb stm811sw16f: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
stm811sw16f-etched.step stm811sw16f: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
stm811sw16f.glb Publish 0.1.0 · Ray 1mo ago
stm811sw16f.kicad_mod Publish 0.1.0 · Ray 1mo ago
stm811sw16f.kicad_sym Publish 0.1.0 · Ray 1mo ago
stm811sw16f.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 4 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
stm811sw16f.step Publish 0.1.0 · Ray 1mo ago

STM811SW16F

STMicroelectronics · Supervisor and Reset ICs · SOT-143

STM811SW16F from STMicroelectronics, in a SOT-143. 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 VSS power_in Ground reference for the supervisor. Tie to the system ground plane.
2 RST output Active-low reset output (push-pull). Asserted (driven low) whenever VCC is below the reset threshold or MR is held low; remains asserted for at least trec (~140 ms) after the fault clears. Guaranteed valid down to VCC = 1 V; both sources and sinks current.
3 MR input Manual reset input, active low. A logic low asserts RST and keeps it asserted for trec after MR returns high. Internally pulled up to VCC via a 20 kΩ resistor, so it may be left open if unused; a normally-open push-button to GND provides a manual reset. Optional 0.1 µF cap from MR to GND for noise immunity.
4 VCC power_in Monitored supply voltage input (typ. 3.0/3.3/5 V depending on threshold variant). A 0.1 µF bypass capacitor to VSS mounted close to this pin is recommended for transient immunity.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-143
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • STM811SW16F
  • STM812SW16F
  • STM811LW16F
  • STM811MW16F
  • STM811RW16F
  • STM811TW16F
  • STM809xW16F
  • STM810xW16F

CAD (KiCad official)

  • Symbol: STM811SW16F
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143 (KiCad packages3D, STEP)
  • 3D model files: stm811sw16f-etched.step / stm811sw16f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm811sw16f.step / stm811sw16f.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
stm811sw16f.step 75 KB You want the bare part, or you mark your own boards.
stm811sw16f-etched.step 1.9 MB You want the part with STM811SW16F already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 482 faces against 87 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: STMicroelectronics datasheet (21 pp, sha256 24f3f88facdeb210, retrieved 2026-08-17, tier: manufacturer)
  • 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