STM812LW16F

STMicroelectronics · Supervisor And Reset ICs · SOT-143-4

STM812LW16F from STMicroelectronics, in a SOT-143-4. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VSS	power_in	Ground reference for the supply monitor.
2	RST	output	Active-high push-pull reset output (STM812) that sources and sinks current, asserted when VCC falls below the reset threshold or MR is low, and held for trec (140 ms min) after release.
3	MR	input	Active-low manual reset input with internal 20 kΩ pull-up (10 to 30 kΩ) that may be left open if unused, and that asserts reset while low and for trec after it returns high.
4	VCC	power_in	Supply voltage monitored by the reset circuit, operating range 1.0 to 5.5 V (absolute maximum 7.0 V).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOT-143-4
Category	Power Management (PMIC)
Pins	4

CAD (KiCad official)

Symbol: STM812LW16F
Footprint: Package_TO_SOT_SMD:SOT-143
3D model: SOT-143-4 (KiCad packages3D, STEP)
3D model files: stm812lw16f-etched.step / stm812lw16f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm812lw16f.step / stm812lw16f.glb are the bare package body.

Provenance

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

Datasheet: STMicroelectronics datasheet (21 pp, sha256 24f3f88facdeb210, retrieved 2026-10-10, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# STM812LW16F

**STMicroelectronics** · Supervisor And Reset ICs · SOT-143-4

STM812LW16F from STMicroelectronics, in a SOT-143-4. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VSS | power_in | Ground reference for the supply monitor. |
| 2 | RST | output | Active-high push-pull reset output (STM812) that sources and sinks current, asserted when VCC falls below the reset threshold or MR is low, and held for trec (140 ms min) after release. |
| 3 | MR | input | Active-low manual reset input with internal 20 kΩ pull-up (10 to 30 kΩ) that may be left open if unused, and that asserts reset while low and for trec after it returns high. |
| 4 | VCC | power_in | Supply voltage monitored by the reset circuit, operating range 1.0 to 5.5 V (absolute maximum 7.0 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-143-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `STM812LW16F`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files: `stm812lw16f-etched.step` / `stm812lw16f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm812lw16f.step` / `stm812lw16f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588939574819504128) (21 pp, sha256 `24f3f88facdeb210`, retrieved 2026-10-10, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/stm812lw16f-datasheet.pdf)