NC7SZ125M5X from onsemi, 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	OE	input	Active-LOW Output Enable (OE, bar). When LOW, the buffer drives Y with the logic level on A; when HIGH, the Y output is placed in the high-impedance (3-STATE) condition. CMOS input, VIH = 0.7*VCC (min) for VCC 2.3-5.5V; 5V-tolerant up to 6V independent of VCC.
2	A	input	Buffer data input. When OE is LOW, the logic level on A is passed to Y; when OE is HIGH, A is a don't-care. High-impedance CMOS input, 5V-tolerant up to 6V independent of VCC.
3	GND	power_in	Ground reference (0 V). Common return for VCC and all logic signals.
4	Y	tri_state	3-STATE buffered output of A. Drives HIGH/LOW when OE is LOW (±24 mA at 3V VCC, ±32 mA at 4.5V VCC), and is placed in high-impedance when OE is HIGH. Output tolerates voltages above VCC while in 3-STATE.
5	VCC	power_in	Positive supply voltage. Operating range 1.65 V to 5.5 V (data retention down to 1.5 V). Quiescent supply current ICC = 2.0 µA typical, 20 µA max.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOT-23-5
Category	Logic
Pins	5

Ordering variants

Same part, different packaging or reel option.

NC7SZ125M5X
NC7SZ125P5X
NC7SZ125L6X

CAD (KiCad official)

Symbol: NC7SZ125M5X
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
`nc7sz125m5x.step`	85 KB	You want the bare part, or you mark your own boards.
`nc7sz125m5x-etched.step`	1.9 MB	You want the part with `NC7SZ125M5X` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 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: onsemi datasheet (8 pp, sha256 754484a119190e4e, 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