# STM810TWX6F

**STMicroelectronics** · Supervisor and Reset ICs · SOT-23-3

STM810TWX6F from STMicroelectronics, in a SOT-23-3. 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 / negative supply reference (0 V). Connect directly to the system ground plane. |
| 2 | RST | output | Active-high push-pull reset output (STM810). Driven high while VCC is below the reset threshold (VRST) and held high for the reset time-out period trec (140 ms min) after VCC recovers. Both source and sink capability; guaranteed valid down to VCC = 1.0 V. A 100 kΩ pull-up to VCC is recommended if the RST signal must remain valid for VCC < 1.0 V. |
| 3 | VCC | power_in | Positive supply input and monitored voltage. Operating range up to 5.5 V (absolute max 7 V). A 0.1 µF bypass capacitor mounted as close as possible to this pin is recommended for transient immunity. The internal comparator trips RST when VCC falls below the factory-set VRST threshold (T suffix = ~3.08 V nominal for 3.3 V systems). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-3 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `STM810TWX6F`
- `STM810TW6F`
- `STM811`
- `STM812`

## CAD (KiCad official)

- Symbol: `STM810TWX6F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `stm810twx6f-etched.step` / `stm810twx6f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm810twx6f.step` / `stm810twx6f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](docs/stm810twx6f-datasheet.pdf) (21 pp, sha256 `24f3f88facdeb210`, 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](docs/stm810twx6f-datasheet.pdf)