SparkFun
SparkFun Analog/Digital MUX Breakout - CD74HC4067
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 c...
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
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- multiplexer
- A multiplexer is a chip or board that lets one controller switch between several devices that would otherwise conflict on the same bus. It matters here because multiple modules with the same I2C address cannot normally share one I2C bus without extra hardware.
- On resistance
- On resistance is the effective resistance of a switch or diode-like circuit when it is turned on. Lower on resistance means less voltage drop and less heating when powering higher-current loads.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
Find this product in
Prototyping & Wiring
CD74HC4067 Datasheet
Datasheet · 384.7 KB · Click any page to view full size
Analog/Digital MUX Breakout Schematic
Schematic · 33.1 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 584.5 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
