JY809ES3-SX from Shenzhen JingYang, in a SOT-23. 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 supervisor.
2	RESET	output	Active-low reset output (open with internal drive). Remains low while VCC is below the factory reset threshold and for 250ms (typ., 140ms min.) after VCC rises above the threshold. Guaranteed valid for VCC >= 1.1V; a 100kΩ pull-down is recommended if logic must be defined below 1.1V. VOL <= 0.1V (R/S/T, ISINK=1.2mA) / 0.2V (L/M/J, ISINK=3.2mA); VOH >= 0.9*VCC (R/S/T) / VCC-1.5 (L/M/J).
3	VCC	power_in	Supply voltage. Operating range 1.1V (TA=0..70°C) or 1.2V (TA=-40..105°C) up to 5.5V. Absolute max -0.3V to 6.0V.

Key specifications

Parameter	Value
Manufacturer	Shenzhen JingYang
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

JY809ES3-R
JY809ES3-SX
JY809ES3-T
JY809ES3-M

CAD (KiCad official)

Symbol: JY809ES3-SX
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`jy809es3-sx.step`	59 KB	You want the bare part, or you mark your own boards.
`jy809es3-sx-etched.step`	2.2 MB	You want the part with `JY809ES3-SX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 525 faces against 69 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: Shenzhen JingYang datasheet (5 pp, sha256 1826e8500c36d006, 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