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)

Provenance

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

Datasheet: STMicroelectronics datasheet (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