STM6822SWY6F from STMicroelectronics, in a SOT-23-5. 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	RST	output	Active-low, open-drain reset output (nRST). Pulses low when triggered and stays low while VCC is below the reset threshold or MR is low; remains low for t_rec (240 ms typ.) after the fault clears. Requires an external pull-up resistor to any supply voltage up to 6 V (10 kΩ typical).
2	VSS	power_in	Ground reference (0 V) for the supervisor.
3	MR	input	Active-low push-button (manual) reset input (nMR). A logic low asserts the reset output; reset stays asserted while MR is low and for t_rec after MR returns high. Contains an internal ~52 kΩ pull-up, so it may be driven by TTL/CMOS logic or shorted to ground via a switch; leave open if unused.
4	WDI	input	Watchdog input. If WDI stays high or low for at least 1.6 s (typ.) the internal watchdog expires and reset is asserted. The internal timer clears on any rising or falling edge while reset is not asserted. The watchdog can be disabled by leaving WDI unconnected or driving it from a tri-state buffer output.
5	VCC	power_in	Supply voltage input, monitored by the internal comparator against the precision reset threshold (V_RST). Decouple with a 0.1 µF capacitor to VSS. Reset assertion is guaranteed valid down to VCC = 1.0 V.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

STM6822SWY6F

CAD (KiCad official)

Symbol: STM6822SWY6F
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`stm6822swy6f.step`	85 KB	You want the bare part, or you mark your own boards.
`stm6822swy6f-etched.step`	2.5 MB	You want the part with `STM6822SWY6F` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 583 faces against 102 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: STMicroelectronics datasheet (31 pp, sha256 ba50f0fd6706f830, retrieved 2026-08-17, tier: manufacturer)
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