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SparkFun Analog/Digital MUX Breakout - CD74HC4067

by Sparkfun

This is a breakout board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067. This chip is like a rotary switch - it internally routes the common pin (COM in the schematic, SIG on the board) to one of 16 channel pins (CHANxx).

It works with both digital and analog signals (the voltage can’t be higher than VCC), and the connections function in either direction. To control it, connect 4 digital outputs to the chip’s address select pins (S0-S3), and send it the binary address of the channel you want (see the datasheet for details). This allows you to connect up to 16 sensors to your system using only 5 pins!

Since the mux/demux also works with digital signals, you can use it to pipe TTL-level serial data to or from multiple devices. For example, you could use it to connect the TX pins of 16 devices to one RX pin on your microcontroller. You can then select any one of those 16 devices to listen to. If you want two-way communications, you can add a second board to route your microcontroller’s TX line to 16 device’s RX lines. By using multiple boards, you can create similar arrangements for I2C, SPI, etc.

The internal switches are bidirectional, support voltages between ground and VCC, have low “on” resistance and low “off” leakage, and to prevent crosstalk, perform “break-before-make” switching. The board also breaks out the chip’s “enable” pin, which when driven high, will completely disconnect the common pin (all switches “off”).

Features:

  • 2V to 6V operation
  • “On” resistance: 70 Ohms @ 4.5V
  • 6ns break-before-make @ 4.5V
  • Wide operating temperature range: -55C to 125C

Documents:

12 customer reviews

2 years ago
The one-liner installer works well on a clean install of Retropie. The amp is just enough to drive a T1-2121SD
by Pablo about Picade X HAT USB-C via REVIEWS.io
3 years ago
Upgraded my original Kickstarter Picade and needed this for Pi 4 compatibility. Works the charm- only wish is that audio was stereo. Other than that, it works well and was an easy upgrade! Recommended
by Chris about Picade X HAT USB-C via REVIEWS.io
4 years ago
Works perfect, very easy to setup, connecting all buttons, joystick and all has been as easy as it gets. Plus the on/off switch is a real treat compared to the old plug / unplug you're used to with the Raspberry Pi. Would recommend 100% !
by Anonyme about Picade X HAT USB-C via REVIEWS.io
5 years ago
This is a brilliant controller board for our arcade project, and makes it really easy to connect everything. We haven't tested it yet but it is a great board.
by Rodney about Picade X HAT USB-C via REVIEWS.io
5 years ago
Worked great, and even with covid shipping was really quick, Would purchase again.
by David about Picade X HAT USB-C via REVIEWS.io
5 years ago
Great service. My item was delivered next day after the order was placed. I would recommend them to order from/
by MARK about Picade X HAT USB-C via REVIEWS.io
6 years ago
An excellent bit of kit! I paired it with RetroPie and my 1980s Competition Pro joystick to create my own little piece of 8-bit gaming heaven...
by Paul about Picade X HAT USB-C via REVIEWS.io
6 years ago
This is a great little board! I wanted to power a Pi and Pi Display in a SmartPi case with USB-C for a bit more power and this was available at an opportune time. The +/- are placed with just enough space to solder a right angle connector and feed wires through the case to the display. Still waiting to get hold of a PSU but this is working well off a bench supply. Software was easy to install, and the IO will come in handy for any controls I want to add to my project.
by Richard about Picade X HAT USB-C via REVIEWS.io
6 years ago
Fast delivering nu air mail . Solide and proffessinal material . Runs perfect .
by Rob about Picade X HAT USB-C via REVIEWS.io
6 years ago
All in one solution for audio and single joystick. Could you make a 2 joystick and trackball model
by Anonymous about Picade X HAT USB-C via REVIEWS.io
6 years ago
Bought this for an arcade project along with a Pi 3 A+. Easy way to provide on/off switch functionality, an audio amp with speaker output and any extra buttons needed.
by James about Picade X HAT USB-C via REVIEWS.io

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