SN74LV4066ADR from Texas Instruments, 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	1A	bidirectional	Input/Output terminal A of analog switch channel 1. Signal passes between 1A and 1B when control input 1C is high. Signal amplitude up to 5.5 V (peak).
2	1B	bidirectional	Input/Output terminal B of analog switch channel 1. Bilateral pair with 1A; on-resistance typ 29 Ω at VCC=3 V (150 Ω max).
3	2B	bidirectional	Input/Output terminal B of analog switch channel 2. Connects to 2A when 2C is high.
4	2A	bidirectional	Input/Output terminal A of analog switch channel 2. Bilateral pair with 2B.
5	2C	input	Control input for channel 2. Switch is ON when this pin is at logic high; OFF when low. Logic input voltage range 0-5.5 V; VIH = VCC×0.7 typical.
6	3C	input	Control input for channel 3. Switch is ON when this pin is at logic high; OFF when low.
7	GND	power_in	Ground (0 V) reference for the device.
8	3A	bidirectional	Input/Output terminal A of analog switch channel 3. Connects to 3B when 3C is high.
9	3B	bidirectional	Input/Output terminal B of analog switch channel 3. Bilateral pair with 3A.
10	4B	bidirectional	Input/Output terminal B of analog switch channel 4. Connects to 4A when 4C is high.
11	4A	bidirectional	Input/Output terminal A of analog switch channel 4. Bilateral pair with 4B.
12	4C	input	Control input for channel 4. Switch is ON when this pin is at logic high; OFF when low.
13	1C	input	Control input for channel 1. Switch is ON when this pin is at logic high; OFF when low.
14	VCC	power_in	Positive supply, 1.65 V to 5.5 V (7 V absolute max). Bypass to GND with a 0.1 µF to 10 µF decoupling capacitor for reliable operation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14
Category	Interface
Pins	14

Ordering variants

Same part, different packaging or reel option.

SN74LV4066ADR
SN74LV4066ADRD
SN74LV4066ADRPW
SN74LV4066ADRPWR
SN74LV4066ADRRGY
SN74LV4066ADRRGYR

CAD (KiCad official)

Symbol: SN74LV4066ADR
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: Texas Instruments datasheet (37 pp, sha256 4fd892bfeb726fef, 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