KIA7042AP-AT from KEC Semicon, in a TO-92-2.54mm. 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	VCC	power_in	Positive supply input. Absolute maximum -0.3 V to +15.0 V; monitored rail for reset detection. Detecting voltage VS = 4.2 V typ (4.05 V min, 4.35 V max) for the KIA7042.
2	GND	power_in	Ground / VEE reference. All voltages referred to this pin.
3	OUT	output	Open-collector active-low reset / detector output. Pulls low when VCC drops below the detecting voltage; requires an external pull-up resistor (RL, e.g. 200 ohm test, 1 kohm typical application). VOL <= 0.4 V at RL=200 ohm; leakage IOH <= 0.1 uA at VCC=15 V; guaranteed to sink >=20 mA at 25 C (>=16 mA over -30 to +75 C); minimum operating VCC for valid low = 0.8 V typ.

Key specifications

Parameter	Value
Manufacturer	KEC Semicon
Package	TO-92-2.54mm
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

KIA7042AP-AT
KIA7042AP-ATAF

CAD (KiCad official)

Symbol: KIA7042AP-AT
Footprint: Package_TO_SOT_THT:TO-92_Inline
3D model: TO-92-2.54mm (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`kia7042ap-at.step`	27 KB	You want the bare part, or you mark your own boards.
`kia7042ap-at-etched.step`	1.3 MB	You want the part with `KIA7042AP-AT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 366 faces against 19 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: KEC Semicon datasheet (4 pp, sha256 ee964c11be24fd17, 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