CD74HC4067 16-Channel Analog/Digital Multiplexer Breakout Board

Expand your microcontroller's capabilities with the CD74HC4067 16-Channel CMOS Analog/Digital Multiplexer Breakout Board by ALLOYSEED. Whether you're building sensor arrays, routing serial data, or managing I2C/SPI lines, this compact MUX module lets you connect up to 16 inputs or outputs using just 5 pins — making it an essential tool for engineers, hobbyists, and makers alike.

Key Features

16-Channel Multiplexing: Based on the high-speed CD74HC4067 CMOS chip, this board acts like a rotary switch, internally routing the common SIG pin to any one of 16 channel pins (C0–C15).
Handles Analog & Digital Signals: Supports both analog and digital signal routing. Simply ensure signal voltage does not exceed VDC for optimal performance.
Bi-Directional Operation: Internal switches are fully bidirectional — signals can flow in either direction, giving you maximum flexibility in circuit design.
Easy Control via 4 Address Pins: Control channel selection by connecting 4 digital outputs to address pins S0–S3 and sending the corresponding binary channel address.
TTL & Protocol Compatible: Routes TTL-level serial data (TX/RX), and supports I2C, SPI, and other protocols. Chain multiple boards for even greater expansion.
Low Resistance & Low Leakage: High-quality internal switches feature low on-resistance and minimal leakage current, ensuring clean and reliable signal transmission.
Enable Pin Control: The onboard enable pin lets you completely disable all channels simultaneously when driven high, providing additional circuit control.

Specifications

Model: CD74HC4067 Breakout Board Module
Channels: 16 (C0–C15 analog signal input)
Channel Control: S0–S3 (4 address pins)
Analog Output: Digital (SIG pin)
Dimensions: 41 × 17 × 3 mm (1.61 × 0.67 × 0.12 in)
Condition: New
Made in Mainland China

What's in the Box

1 × CD74HC4067 Analog/Digital Multiplexer Breakout Board

Ideal Applications

Arduino, Raspberry Pi & other microcontroller sensor expansion
Multi-sensor data acquisition systems
TTL serial data routing to multiple devices
I2C / SPI bus expansion
DIY electronics and prototyping projects

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Learn more: Multiplexer

Frequently Asked Questions

Q: What is the CD74HC4067 multiplexer breakout board used for?

A: The CD74HC4067 16-channel analog/digital multiplexer breakout board is used to expand the number of input/output pins on a microcontroller (such as Arduino or Raspberry Pi). It allows you to connect up to 16 sensors or devices using only 5 microcontroller pins, making it ideal for sensor arrays, serial data routing, and protocol expansion (I2C, SPI, TTL).

Q: Can the CD74HC4067 MUX board handle both analog and digital signals?

A: Yes. The CD74HC4067 CMOS multiplexer breakout board is designed to handle both analog and digital signals. The key requirement is that the signal voltage must not exceed the VDC supply voltage of the board for safe and optimal performance.

Q: How do I select a specific channel on the CD74HC4067 breakout board?

A: Channel selection is controlled via 4 digital address pins labeled S0–S3. By sending the binary address of the desired channel (0–15) to these pins from your microcontroller, the board routes the SIG (common) pin to the corresponding channel (C0–C15). Refer to the CD74HC4067 datasheet for the full binary address table.

Q: What are the physical dimensions of this multiplexer module?

A: The CD74HC4067 breakout board measures 41 × 17 × 3 mm (approximately 1.61 × 0.67 × 0.12 inches), making it compact and easy to integrate into breadboards or custom PCB enclosures.

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