MAX809J from TECH PUBLIC, 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 pin. Connect to system ground.
2	RESET	output	Active-low reset output (push-pull). Drives low when VDD falls below the reset threshold (J = 4.00 V typ, 3.92 V min / 4.08 V max at 25 degC). Returns high after VDD recovers above the threshold and the reset timeout (TR, 240 ms typ, 140 ms min) elapses. VOL <= 0.3 V, VOH >= VDD-0.4 V; output current rated up to 20 mA.
3	VDD	power_in	Chip supply and monitored voltage input. Operating range 1.0 V to 5.5 V (absolute max +6.0 V). Typical supply current 8-14 uA over 2-5 V. This is the node compared to the internal reference to generate RESET.

Key specifications

Parameter	Value
Manufacturer	TECH PUBLIC
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

MAX809J

CAD (KiCad official)

Symbol: MAX809J
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
`max809j.step`	59 KB	You want the bare part, or you mark your own boards.
`max809j-etched.step`	1.4 MB	You want the part with `MAX809J` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 349 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: TECH PUBLIC datasheet (7 pp, sha256 bf42717802d474fe, 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