74HC125D from Nexperia, in a SOIC-14. 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	1OE	input	Output enable input for buffer 1 (active LOW). A LOW enables buffer 1 to pass 1A to 1Y; a HIGH places 1Y into high-impedance state.
2	1A	input	Data input for buffer 1. CMOS-level input (74HC125) or TTL-level input (74HCT125); VI range 0 V to VCC.
3	1Y	tri_state	Data output for buffer 1. 3-state output; drives typically ±6 mA at VCC = 4.5 V. High-Z when 1OE is HIGH.
4	2OE	input	Output enable input for buffer 2 (active LOW). A LOW enables 2A to 2Y; a HIGH places 2Y into high-impedance state.
5	2A	input	Data input for buffer 2. CMOS/TTL logic input; VI range 0 V to VCC.
6	2Y	tri_state	Data output for buffer 2. 3-state output controlled by 2OE.
7	GND	power_in	Ground reference (0 V).
8	3Y	tri_state	Data output for buffer 3. 3-state output controlled by 3OE.
9	3A	input	Data input for buffer 3. CMOS/TTL logic input; VI range 0 V to VCC.
10	3OE	input	Output enable input for buffer 3 (active LOW). A LOW enables 3A to 3Y; a HIGH places 3Y into high-impedance state.
11	4Y	tri_state	Data output for buffer 4. 3-state output controlled by 4OE.
12	4A	input	Data input for buffer 4. CMOS/TTL logic input; VI range 0 V to VCC.
13	4OE	input	Output enable input for buffer 4 (active LOW). A LOW enables 4A to 4Y; a HIGH places 4Y into high-impedance state.
14	VCC	power_in	Positive supply voltage. 74HC125: 2.0 V to 6.0 V. 74HCT125: 4.5 V to 5.5 V.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	SOIC-14
Category	Logic
Pins	14

Ordering variants

74HC125DD
74HC125DPW

CAD (KiCad official)

Symbol: 74HC125D
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74hc125d.step`	195 KB	You want the bare part, or you mark your own boards.
`74hc125d-etched.step`	1.8 MB	You want the part with `74HC125D` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 473 faces against 237 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: Nexperia datasheet (13 pp, sha256 3b5da3a3dcae2624, 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