MC74HC4066ADR2G from onsemi, in a SOIC-14. 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	XA	bidirectional	Analog input/output of switch A. Bidirectional analog signal terminal; passes V_CC-to-GND range signals when A control is high. R_ON typ. 70 Ω at V_CC=4.5 V.
2	YA	bidirectional	Analog input/output of switch A. Bidirectional analog signal terminal paired with XA.
3	YB	bidirectional	Analog input/output of switch B. Bidirectional analog signal terminal paired with XB.
4	XB	bidirectional	Analog input/output of switch B. Bidirectional analog signal terminal paired with YB.
5	B_CTRL	input	B ON/OFF control input. Digital control: H = switch B ON, L = switch B OFF. V_IH ≥ 3.15 V at V_CC=4.5 V; V_IL ≤ 1.35 V.
6	C_CTRL	input	C ON/OFF control input. Digital control: H = switch C ON, L = switch C OFF.
7	GND	power_in	Ground / negative supply reference (0 V). Analog signals must remain between GND and V_CC.
8	XC	bidirectional	Analog input/output of switch C. Bidirectional analog signal terminal paired with YC.
9	YC	bidirectional	Analog input/output of switch C. Bidirectional analog signal terminal paired with XC.
10	YD	bidirectional	Analog input/output of switch D. Bidirectional analog signal terminal paired with XD.
11	XD	bidirectional	Analog input/output of switch D. Bidirectional analog signal terminal paired with YD.
12	D_CTRL	input	D ON/OFF control input. Digital control: H = switch D ON, L = switch D OFF.
13	A_CTRL	input	A ON/OFF control input. Digital control: H = switch A ON, L = switch A OFF.
14	VCC	power_in	Positive supply voltage, 2.0 V to 12.0 V (referenced to GND). Absolute maximum 14.0 V. Sets upper rail for analog signals passed by the switches.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-14
Category	Interface
Pins	14

Ordering variants

Same part, different packaging or reel option.

MC74HC4066ADR2GDG
MC74HC4066ADR2G
MC74HC4066ADR2GDTR2G

CAD (KiCad official)

Symbol: MC74HC4066ADR2G
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: onsemi datasheet (16 pp, sha256 4c12e640556642e7, 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