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Small green rectangular PCB with rows of gold header pins and a black 24-pin surface-mount IC labeled CD74HC4067

SparkFun Electronics

SparkFun CD74HC4067 16-Channel Analog/Digital MUX Breakout

SKU CH-8A1S-KTKVZ

A 16-channel analog/digital multiplexer breakout operating from 2V to 6V with 70 Ohms on-resistance at 4.5V and a -55C to 125C temperature range

  • TypeEngineering Development Tools
  • Routes 16 channels through a single pin using only 5 microcontroller connections
  • Handles both analog and digital signals up to the supply voltage
  • Operates from 2 V to 6 V for flexible logic-level compatibility
  • Low 70 Ω on-resistance at 4.5 V keeps signal loss minimal
  • Wide -55 °C to 125 °C range suits harsh environment deployments

16-Channel Multiplexer Breakout

The SparkFun CD74HC4067 breakout board routes one common signal to any of sixteen channels using four address pins. It handles both analog and digital signals at voltages up to the supply rail. The design supports 2 V to 6 V operation and works across a -55 °C to 125 °C range. This tool suits engineers expanding limited microcontroller I/O.

Project Suitability && Limits

Makers needing to read many sensors or switch multiple serial lines with few pins will find this board useful. Builders requiring lower on-resistance than 70 Ω at 4.5 V or faster switching than 6 ns break-before-make should look elsewhere. Applications demanding more than sixteen channels or operation below 2 V are not supported.

Key Electrical Specification

On-resistance measures 70 Ω at 4.5 V supply, setting the signal loss and crosstalk floor for every channel. The 6 ns break-before-make timing at the same voltage defines the maximum safe switching rate. These two figures together determine whether the part meets a given design’s accuracy and speed requirements.

Highlights

  • Routes 16 channels through a single pin using only 5 microcontroller connections
  • Handles both analog and digital signals up to the supply voltage
  • Operates from 2 V to 6 V for flexible logic-level compatibility
  • Low 70 Ω on-resistance at 4.5 V keeps signal loss minimal
  • Wide -55 °C to 125 °C range suits harsh environment deployments

Specifications

TypeEngineering Development Tools

Questions about this item

Does the breakout come with headers or do I need to solder my own?

The board ships without headers; you will need to solder pins or wires to the through-hole pads yourself.

How do I decide between using the CD74HC4067 for analog sensors versus digital signals?

The chip handles both analog and digital voltages up to VCC, so choose it when you need to multiplex either type through the same 16 channels.

What does the 70 Ohm on-resistance at 4.5V mean for my sensor readings?

Each active channel adds about 70 Ohms in series with the signal path, which can slightly attenuate high-impedance analog sensors.

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