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Pinout
Key specifications
Ordering variants
CAD (KiCad official)
Provenance

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CD74HC4051QM96Q1

Texas Instruments · Signal Switches / Encoders & Decoders / Multiplexers · SOP-16

CD74HC4051QM96Q1 from Texas Instruments, in a SOP-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 I/O A4. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 100 and E is low. Signal range VEE to VCC (up to 10 V span, ±5 V bipolar). Typical rON ≈ 70 Ω @ VCC−VEE=4.5 V.
2	A6	bidirectional	Analog channel I/O A6. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 110 and E is low. Signal range VEE to VCC.
3	COM	bidirectional	Common analog OUT/IN (COM OUT/IN A). Shared side of the 8:1 analog switch matrix; routes to the addressed A0-A7 channel. Signal range VEE to VCC; bidirectional (can drive or be driven).
4	A7	bidirectional	Analog channel I/O A7. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 111 and E is low. Signal range VEE to VCC.
5	A5	bidirectional	Analog channel I/O A5. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 101 and E is low. Signal range VEE to VCC.
6	E	input	Active-low enable input. When E = low, the addressed channel is connected to COM; when E = high, all channels are OFF (high impedance) regardless of S2:S0. Digital CMOS logic level referenced to VCC/GND (VIH ≥ 3.15 V @ VCC=4.5 V).
7	VEE	power_in	Negative analog supply for the switch matrix. Sets the lower rail of the analog signal range (VEE to VCC). Range 0 V to −6 V; VCC − VEE ≤ 10 V. Tie to GND for single-supply (0 V) operation.
8	GND	power_in	Ground / logic reference (0 V). Reference for the digital control inputs (E, S0-S2) and lower rail of the digital logic supply.
9	S2	input	Address select bit 2 (MSB) for the 1-of-8 channel decoder. Digital CMOS input referenced to VCC/GND. Combined with S1 and S0 to select which A0-A7 channel connects to COM.
10	S1	input	Address select bit 1 for the 1-of-8 channel decoder. Digital CMOS input referenced to VCC/GND.
11	S0	input	Address select bit 0 (LSB) for the 1-of-8 channel decoder. Digital CMOS input referenced to VCC/GND.
12	A3	bidirectional	Analog channel I/O A3. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 011 and E is low. Signal range VEE to VCC.
13	A0	bidirectional	Analog channel I/O A0. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 000 and E is low. Signal range VEE to VCC.
14	A1	bidirectional	Analog channel I/O A1. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 001 and E is low. Signal range VEE to VCC.
15	A2	bidirectional	Analog channel I/O A2. Bidirectional analog switch terminal; connects to COM (pin 3) when S2S1S0 = 010 and E is low. Signal range VEE to VCC.
16	VCC	power_in	Positive digital/analog supply. Range 2 V to 6 V (VCC − VEE ≤ 10 V). Powers the internal logic-level conversion, decoder, and upper rail of the analog switch matrix. Bypass with a local ceramic capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOP-16
Category	Logic
Pins	16

Ordering variants

CD74HC4051QM96Q1
CD74HC4051QM96Q1QPWRQ1

CAD (KiCad official)

Symbol: CD74HC4051QM96Q1
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (None pp, sha256 4d58d74515cb6e7d, 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

Symbol & Footprint

Schematic Symbol

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