A breakout board for the CD74HC4067 16-channel analogue/digital multiplexer/demultiplexer. This IC internally routes a common signal pin (SIG) to one of 16 channel pins, working with both analogue and digital signals in either direction. Control which channel is active using 4 digital address lines (S0–S3) — connect up to 16 sensors using only 5 microcontroller pins.

The bidirectional switches support voltages between ground and VCC with low on-resistance and break-before-make switching to prevent crosstalk. An enable pin allows you to completely disconnect all channels when driven high.

Key Features

• 16 Channels – Multiplex/demultiplex analogue or digital signals
• Bidirectional – Signals can flow in either direction
• Operating Voltage – 2 V to 6 V
• On Resistance – 70 Ω at 4.5 V
• Break-Before-Make – 6 ns switching at 4.5 V
• Enable Pin – Disconnect all channels when not in use
• Operating Temperature – −55 °C to +125 °C
• 4-Bit Address – S0–S3 select the active channel

Ideal For

• Expanding analogue inputs on microcontrollers
• Routing serial data to/from multiple devices
• Sensor arrays and multi-channel data acquisition
• I²C, SPI, or UART signal routing (with multiple boards)

Package Contents

• 1× SparkFun CD74HC4067 MUX Breakout

Resources

• CD74HC4067 Datasheet (PDF)
• Schematic (PDF)
• Design Files (GitHub)