74LVC1G66GW from Nexperia, in a SOT-353. 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	Y	bidirectional	Independent analog switch input or output terminal. Bidirectional analog signal path connected to Z when E is HIGH. Signal voltage must remain between 0 V and VCC.
2	Z	bidirectional	Independent analog switch output or input terminal. Bidirectional analog signal path connected to Y when E is HIGH. Signal voltage must remain between 0 V and VCC.
3	GND	power_in	Ground reference (0 V) for the device.
4	E	input	Digital enable input, active HIGH. When E = HIGH the analog switch is ON (Y-Z connected); when E = LOW the switch is OFF. Schmitt-trigger input, overvoltage tolerant to 5.5 V regardless of VCC.
5	VCC	power_in	Positive supply voltage, 1.65 V to 5.5 V (absolute max 6.5 V). Sets the maximum switch signal voltage on Y/Z.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	SOT-353
Category	Interface
Pins	5

Ordering variants

74LVC1G66GW
74LVC1G66GWGV
74LVC1G66GWGZ
74LVC1G66GWGM
74LVC1G66GWGN
74LVC1G66GWGS

CAD (KiCad official)

Symbol: 74LVC1G66GW
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SOT-353 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74lvc1g66gw.step`	87 KB	You want the bare part, or you mark your own boards.
`74lvc1g66gw-etched.step`	1.9 MB	You want the part with `74LVC1G66GW` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 468 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: Nexperia datasheet (23 pp, sha256 3da663595b759c8f, 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