SN74AHC1G00DCKR from Texas Instruments, in a SC-70-5. 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	A	input	NAND gate logic input A. CMOS Schmitt-trigger input, overvoltage tolerant to 5.5 V regardless of VCC. Unused inputs must be tied to VCC or GND.
2	B	input	NAND gate logic input B. CMOS Schmitt-trigger input, overvoltage tolerant to 5.5 V regardless of VCC. Unused inputs must be tied to VCC or GND.
3	GND	power_in	Ground reference (0 V) for the device.
4	Y	output	NAND gate output, Y = NOT(A AND B). Totem-pole CMOS output rated for +/-8 mA drive at VCC = 5 V (+/-4 mA at 3.3 V). Load current must not exceed 25 mA per output and 50 mA total for the part; do not pull above VCC.
5	VCC	power_in	Positive supply, 2 V to 5.5 V recommended (absolute max 7 V). Bypass locally with a 0.1 uF ceramic capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SC-70-5
Category	Logic
Pins	5

Ordering variants

Same part, different packaging or reel option.

SN74AHC1G00DCKR
SN74AHC1G00DCKRDCKT
SN74AHC1G00DCKRDBVR
SN74AHC1G00DCKRDBVT
SN74AHC1G00DCKRDRLR

CAD (KiCad official)

Symbol: SN74AHC1G00DCKR
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SC-70-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74ahc1g00dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`sn74ahc1g00dckr-etched.step`	2.6 MB	You want the part with `SN74AHC1G00DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 645 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: Texas Instruments datasheet (28 pp, sha256 a36352df5fcce3eb, 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