CD74HC4051M96 from Texas Instruments, in a SOIC-16. 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	A4	bidirectional	Analog channel 4 in/out. Bidirectional analog switch terminal; connects to COM when S2:S0 = 100 and E is low. Signal range VEE to VCC, up to 10 V pk-pk.
2	A6	bidirectional	Analog channel 6 in/out. Bidirectional analog switch terminal; connects to COM when S2:S0 = 110 and E is low.
3	COM	bidirectional	Common analog out/in. The shared switch terminal that connects to one of A0-A7 based on the S0-S2 select code when E is low.
4	A7	bidirectional	Analog channel 7 in/out. Bidirectional analog switch terminal; connects to COM when S2:S0 = 111 and E is low.
5	A5	bidirectional	Analog channel 5 in/out. Bidirectional analog switch terminal; connects to COM when S2:S0 = 101 and E is low.
6	~{E}	input	Enable, active low. When E is high, all eight channels are OFF (disconnected from COM) regardless of the S0-S2 code. Digital input referenced to VCC/GND.
7	VEE	power_in	Negative analog supply. Sets the lower limit of the analog signal range. Typically 0 V for unipolar operation or up to -6 V for bipolar operation; VCC - VEE must not exceed 10 V.
8	GND	power_in	Digital ground reference for control inputs (S0-S2, E). Also the reference for the VCC digital supply.
9	S2	input	Channel-select bit 2 (MSB). Together with S1 and S0 selects which of A0-A7 is connected to COM. CMOS digital input.
10	S1	input	Channel-select bit 1. Digital input to the binary-to-1-of-8 decoder.
11	S0	input	Channel-select bit 0 (LSB). Digital input to the binary-to-1-of-8 decoder.
12	A3	bidirectional	Analog channel 3 in/out. Connects to COM when S2:S0 = 011 and E is low.
13	A0	bidirectional	Analog channel 0 in/out. Connects to COM when S2:S0 = 000 and E is low.
14	A1	bidirectional	Analog channel 1 in/out. Connects to COM when S2:S0 = 001 and E is low.
15	A2	bidirectional	Analog channel 2 in/out. Connects to COM when S2:S0 = 010 and E is low.
16	VCC	power_in	Positive supply. HC types: 2 V to 6 V; HCT types: 4.5 V to 5.5 V. Also sets the upper analog signal rail; VCC - VEE must not exceed 10 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

CD74HC4051M96M
CD74HC4051M96
CD74HC4051M96E
CD74HC4051M96N
CD74HC4051M96F
CD74HC4051M96J
CD74HC4051M96NS
CD74HC4051M96PW

CAD (KiCad official)

Symbol: CD74HC4051M96
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cd74hc4051m96.step`	217 KB	You want the bare part, or you mark your own boards.
`cd74hc4051m96-etched.step`	2.9 MB	You want the part with `CD74HC4051M96` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 717 faces against 267 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: Texas Instruments datasheet (45 pp, sha256 b9165a634703374a, 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