CAT811STBI-GT3-MS
Public Unreviewedby Ray
MSKSEMI Supervisor and Reset ICs, SOT-143. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownCAT811STBI-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 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).