74HC4066PW from Nexperia, in a TSSOP-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	1Y	bidirectional	Switch 1 independent input/output terminal Y. Bidirectional analog switch pin; paired with 1Z when 1E is HIGH. V_SW range GND to V_CC, switch current up to ±25 mA.
2	1Z	bidirectional	Switch 1 independent input/output terminal Z. Bidirectional analog switch pin; paired with 1Y when 1E is HIGH.
3	2Z	bidirectional	Switch 2 independent input/output terminal Z. Bidirectional analog switch pin; paired with 2Y when 2E is HIGH.
4	2Y	bidirectional	Switch 2 independent input/output terminal Y. Bidirectional analog switch pin; paired with 2Z when 2E is HIGH.
5	2E	input	Enable input for switch 2 (active HIGH). HIGH closes the 2Y-2Z switch; LOW opens it. CMOS input levels for 74HC4066.
6	3E	input	Enable input for switch 3 (active HIGH). HIGH closes the 3Y-3Z switch; LOW opens it.
7	GND	power_in	Ground reference (0 V). Ground current up to -50 mA absolute maximum.
8	3Y	bidirectional	Switch 3 independent input/output terminal Y. Bidirectional analog switch pin; paired with 3Z when 3E is HIGH.
9	3Z	bidirectional	Switch 3 independent input/output terminal Z. Bidirectional analog switch pin; paired with 3Y when 3E is HIGH.
10	4Z	bidirectional	Switch 4 independent input/output terminal Z. Bidirectional analog switch pin; paired with 4Y when 4E is HIGH.
11	4Y	bidirectional	Switch 4 independent input/output terminal Y. Bidirectional analog switch pin; paired with 4Z when 4E is HIGH.
12	4E	input	Enable input for switch 4 (active HIGH). HIGH closes the 4Y-4Z switch; LOW opens it.
13	1E	input	Enable input for switch 1 (active HIGH). HIGH closes the 1Y-1Z switch; LOW opens it.
14	VCC	power_in	Positive supply voltage. Recommended V_CC = 2.0 to 10.0 V for 74HC4066; absolute maximum -0.5 to +11.0 V. Supply current up to 50 mA absolute maximum.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	TSSOP-14
Category	Interface
Pins	14

Ordering variants

74HC4066PW
74HC4066PWD
74HC4066PWBQ

CAD (KiCad official)

Symbol: 74HC4066PW
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74hc4066pw.step`	194 KB	You want the bare part, or you mark your own boards.
`74hc4066pw-etched.step`	2.3 MB	You want the part with `74HC4066PW` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 584 faces against 237 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 (21 pp, sha256 3fca0cb9e46e306f, 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