// ICs & Logic

CD4051B

The CD4051B is an 8-channel analog multiplexer/demultiplexer. Three binary select inputs choose one of 8 channels to connect to the common I/O. Used to multiplex analog inputs to a single ADC pin.

// Specifications

Supply Voltage

3V – 20V

Channels

8 analog

Control Pins

3 (binary select)

On-resistance

80 Ohm typical at 5V

Package

DIP-16

Bandwidth

40 MHz

// Pin Reference Table

Pin	Name	Function	Type
1	CH4	Channel 4 I/O	I/O
2	CH6	Channel 6 I/O	I/O
3	CH7	Channel 7 I/O	I/O
4	CH5	Channel 5 I/O	I/O
5	INH	Inhibit, HIGH disables all channels	I/O
6	VEE	Negative supply or GND	GND
7	GND	Ground	GND
8	COM	Common I/O to mux/demux	I/O
9	CH3	Channel 3 I/O	I/O
10	CH0	Channel 0 I/O	I/O
11	CH1	Channel 1 I/O	I/O
12	CH2	Channel 2 I/O	I/O
13	SEL-A	Select bit A (LSB)	I/O
14	SEL-B	Select bit B	I/O
15	SEL-C	Select bit C (MSB)	I/O
16	VDD	Positive supply 3V–20V	PWR