74LVC1G66CT05ARCQ from GR, 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	A	bidirectional	Bidirectional analog switch I/O terminal A. Connects to switch terminal B when control input C is high. Signal voltage range 0 V to VCC (up to 5.5 V peak).
2	B	bidirectional	Bidirectional analog switch I/O terminal B. Connects to switch terminal A when control input C is high. Signal voltage range 0 V to VCC (up to 5.5 V peak).
3	GND	power_in	Ground reference (0 V).
4	C	input	Digital control input for the analog switch. Low = switch OFF (A disconnected from B); High = switch ON. VIH = VCC × 0.65-0.7 depending on VCC range; VIL = VCC × 0.3-0.35.
5	VCC	power_in	Positive supply voltage input, 1.65 V to 5.5 V operating range (absolute max 6.5 V). Bypass with a local decoupling capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	GR
Package	SC-70-5
Category	Interface
Pins	5

Ordering variants

Same part, different packaging or reel option.

74LVC1G66CT05ARCQLT05ARCQ
74LVC1G66CT05ARCQ
74LVC1G66CT05ARCQDT05ARDQ
74LVC1G66CT05ARCQBD06AREQ
74LVC1G66CT05ARCQCD06AREQ
74LVC1G66CT05ARCQAG05ARCQ

CAD (KiCad official)

Symbol: 74LVC1G66CT05ARCQ
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SC-70-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: GR datasheet (12 pp, sha256 fca52bfef5407645, retrieved 2026-08-17, tier: lcsc)
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