SN74AHC1G125DCKR 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	OE	input	Active-low output enable. When OE is low, the buffer passes A to Y; when OE is high, the Y output is placed in the high-impedance (3-state) condition. Input voltage range 0 V to 5.5 V; VIH = 2.1 V min at VCC = 3 V, 3.85 V min at VCC = 5.5 V.
2	A	input	Buffer data input. Data at A is passed through to Y when OE is low. Input voltage range 0 V to 5.5 V; input leakage ±1 µA max. Unused inputs must be tied to VCC or GND.
3	GND	power_in	Device ground reference (0 V). Return for VCC supply and all logic signals.
4	Y	tri_state	3-state buffer output. Drives the buffered A signal when OE is low; high-impedance when OE is high. ±8 mA drive at VCC = 4.5 V (±4 mA at 3 V, ±50 µA at 2 V). Off-state leakage (IOZ) ±2.5 µA max.
5	VCC	power_in	Positive supply voltage. Recommended operating range 2 V to 5.5 V. Supply current ICC = 10 µA max (1 µA typ at 25 °C). Bypass with a local decoupling 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.

SN74AHC1G125DCKR
SN74AHC1G125DCKRDCKT
SN74AHC1G125DCKRDBVR
SN74AHC1G125DCKRDBVT
SN74AHC1G125DCKRDRLR

CAD (KiCad official)

Symbol: SN74AHC1G125DCKR
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
`sn74ahc1g125dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`sn74ahc1g125dckr-etched.step`	2.6 MB	You want the part with `SN74AHC1G125DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 652 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 (27 pp, sha256 052d22c81db989f4, 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