SN74LVC1G126DCKR 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	Output-enable input (active high). Drive high to pass the A input through to Y; drive low to place the Y output in the high-impedance (Hi-Z) state. 5.5 V-tolerant CMOS input.
2	A	input	Buffer data input. When OE is high, the logic level on A is buffered and driven onto Y. 5.5 V-tolerant CMOS input accepting VI up to 5.5 V regardless of VCC.
3	GND	power_in	Ground reference (0 V). Return for VCC supply current and the low-level output current up to 32 mA at VCC = 4.5 V.
4	Y	tri_state	Three-state buffer output. Drives the buffered value of A when OE is high, and enters high-impedance (Hi-Z) when OE is low. Sinks/sources up to ±24 mA at VCC = 3.3 V (±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 1.5 V min). Bypass locally with a 0.1 µF ceramic capacitor to GND. Quiescent 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.

SN74LVC1G126DCKR
SN74LVC1G126DCKRDCKT
SN74LVC1G126DCKRDBVR
SN74LVC1G126DCKRDBVT
SN74LVC1G126DCKRDRLR
SN74LVC1G126DCKRYZPR
SN74LVC1G126DCKRDRYR
SN74LVC1G126DCKRDSFR

CAD (KiCad official)

Symbol: SN74LVC1G126DCKR
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
`sn74lvc1g126dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`sn74lvc1g126dckr-etched.step`	2.6 MB	You want the part with `SN74LVC1G126DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 638 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 (49 pp, sha256 c73611ec7322b956, 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