component

CAT811STBI-GT3-MS

Public Made by Adom

by adom

MSKSEMI 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 cat811stbi-gt3-ms: 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
cat811stbi-gt3-ms-etched.fit.json cat811stbi-gt3-ms: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cat811stbi-gt3-ms-etched.glb cat811stbi-gt3-ms: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cat811stbi-gt3-ms-etched.step cat811stbi-gt3-ms: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cat811stbi-gt3-ms.glb Publish 0.1.0 · Ray
cat811stbi-gt3-ms.kicad_mod Publish 0.1.0 · Ray
cat811stbi-gt3-ms.kicad_sym Publish 0.1.0 · Ray
cat811stbi-gt3-ms.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
cat811stbi-gt3-ms.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 cat811stbi-gt3-ms: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md cat811stbi-gt3-ms: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CAT811STBI-GT3-MS

MSKSEMI · Supervisor and Reset ICs · SOT-143

CAT811STBI-GT3-MS from MSKSEMI, 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 GND power_in Ground reference for the device.
2 RESET output Active-low push-pull reset output. Held low (VOL ~0.03V @ 1.2mA sink) when VIN is below the detect level (VDET = 2.93V for -S variant); driven high (VOH ~ VIN-0.05V @ 1.2mA source) 240ms after VIN rises above VDET. Guaranteed low while VIN > 1V.
3 MR input Active-low manual reset input. Pulling MR below VIL (0.3 x VIN) forces RESET low; MR must be above VIH (0.7 x VIN) for normal operation. Typically driven by a push button to GND.
4 VIN power_in Supply input and monitored voltage node. Operating range 1V to 6V (absolute max -0.3V to 8V). Compared against internal VDET = 2.93V for the -S variant.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • CAT811STBI-GT3-MS

CAD (KiCad official)

  • Symbol: CAT811STBI-GT3-MS
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143 (KiCad packages3D, STEP)
  • 3D model files: cat811stbi-gt3-ms-etched.step / cat811stbi-gt3-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cat811stbi-gt3-ms.step / cat811stbi-gt3-ms.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cat811stbi-gt3-ms.step 75 KB You want the bare part, or you mark your own boards.
cat811stbi-gt3-ms-etched.step 2.6 MB You want the part with CAT811STBI-GT3-MS already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 646 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: MSKSEMI datasheet (7 pp, sha256 3c4bce5324899f80, 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