SN74LVC1G240DCKR 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 inverter drives Y from A; when OE is high, Y goes to a high-impedance state. Should be tied to VCC through a pull-up (or driven) to retain high-Z during power up/down.
2	A	input	Logic input A. CMOS input accepts voltages up to 5.5V regardless of VCC (allows down-translation). VIH/VIL thresholds scale with VCC per the recommended operating conditions.
3	GND	power_in	Ground / 0V reference for the device.
4	Y	tri_state	Inverting 3-state output. Y = NOT(A) when OE is low, and high-impedance when OE is high. Rated ±24mA drive at 3.3V VCC (±32mA at 4.5V).
5	VCC	power_in	Positive supply. Operating range 1.65V to 5.5V (1.5V data retention only). Bypass with a 0.1µF ceramic near the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN74LVC1G240DCKR
SN74LVC1G240DCKRDCKT
SN74LVC1G240DCKRDBVR
SN74LVC1G240DCKRDBVT
SN74LVC1G240DCKRYZPR
SN74LVC1G240DCKRDRYR
SN74LVC1G240DCKRDSFR

CAD (KiCad official)

Symbol: SN74LVC1G240DCKR
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
`sn74lvc1g240dckr.step`	87 KB	You want the bare part, or you mark your own boards.
`sn74lvc1g240dckr-etched.step`	2.6 MB	You want the part with `SN74LVC1G240DCKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 646 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 (42 pp, sha256 44c6414940caef3c, 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