SN74AHCU04DR from Texas Instruments, 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	1A	input	Inverter 1 input. CMOS logic input; VIH = 1.7 V (VCC=2V), 2.4 V (VCC=3V), 4.4 V (VCC=5.5V). Drives 1Y = /1A.
2	1Y	output	Inverter 1 output. Unbuffered CMOS output; Y = /A. IOH/IOL = ±8 mA at VCC = 5 V ±0.5 V.
3	2A	input	Inverter 2 input. CMOS logic input driving 2Y = /2A.
4	2Y	output	Inverter 2 output. Unbuffered CMOS output, Y = /A.
5	3A	input	Inverter 3 input. CMOS logic input driving 3Y = /3A.
6	3Y	output	Inverter 3 output. Unbuffered CMOS output, Y = /A.
7	GND	power_in	Ground reference. 0 V return for VCC and all logic signals.
8	4Y	output	Inverter 4 output. Unbuffered CMOS output, Y = /A.
9	4A	input	Inverter 4 input. CMOS logic input driving 4Y = /4A.
10	5Y	output	Inverter 5 output. Unbuffered CMOS output, Y = /A.
11	5A	input	Inverter 5 input. CMOS logic input driving 5Y = /5A.
12	6Y	output	Inverter 6 output. Unbuffered CMOS output, Y = /A.
13	6A	input	Inverter 6 input. CMOS logic input driving 6Y = /6A.
14	VCC	power_in	Positive supply, 2 V to 5.5 V. Decouple locally with a 0.1 uF ceramic capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

SN74AHCU04DRD
SN74AHCU04DR
SN74AHCU04DRN
SN74AHCU04DRNSR
SN74AHCU04DRDBR
SN74AHCU04DRPW
SN74AHCU04DRPWR
SN74AHCU04DRDGVR
SN74AHCU04DRRGYR
SN74AHCU04DRJ
SN74AHCU04DRW
SN74AHCU04DRFK

CAD (KiCad official)

Symbol: SN74AHCU04DR
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
`sn74ahcu04dr.step`	195 KB	You want the bare part, or you mark your own boards.
`sn74ahcu04dr-etched.step`	2.5 MB	You want the part with `SN74AHCU04DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 648 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: Texas Instruments datasheet (23 pp, sha256 d32bb24afddf475c, 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