SN74LVC1G125DCKR 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 (OE). When low, the buffer passes A to Y; when high, the Y output is placed in the high-impedance (3-state) condition. Standard CMOS input, accepts up to 5.5 V regardless of VCC. Should be tied to VCC through a pull-up resistor to guarantee Hi-Z during power up/down.
2	A	input	Buffer data input. Standard CMOS input with high impedance; accepts input voltages up to 5.5 V independent of VCC (supports down-translation to VCC). Do not leave floating during operation.
3	GND	power_in	Ground (0 V) reference pin for the device.
4	Y	tri_state	Balanced CMOS 3-state buffer output. Follows the A input when OE is low; high-impedance when OE is high. Drives ±24 mA at VCC = 3.3 V (up to ±32 mA at 4.5 V).
5	VCC	power_in	Positive supply pin. Recommended operating range 1.65 V to 5.5 V (data retention only down to 1.5 V); absolute max 6.5 V. Typical ICC ≤ 10 µA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN74LVC1G125DCKR
SN74LVC1G125DCKRDCKT
SN74LVC1G125DCKRDBVR
SN74LVC1G125DCKRDBVT
SN74LVC1G125DCKRDRLR
SN74LVC1G125DCKRDRYR
SN74LVC1G125DCKRDSFR
SN74LVC1G125DCKRDPWR
SN74LVC1G125DCKRYZPR

CAD (KiCad official)

Symbol: SN74LVC1G125DCKR
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
`sn74lvc1g125dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`sn74lvc1g125dckr-etched.step`	2.5 MB	You want the part with `SN74LVC1G125DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 631 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 (52 pp, sha256 65afa3f9d879b37c, 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