SparkFun Multiplexer Breakout - 8 Channel (74HC4051)

The SparkFun Multiplexer Breakout provides access to all pins and features of the 74HC4051, an 8-channel analogue multiplexer/demultiplexer. The 74HC4051 allows you to turn four I/O pins into eight multifunctional, individually selectable signals, which can be used to do everything from driving eight LEDs to monitoring eight potentiometers.

The 74HC4051 can function as either a multiplexer or a demultiplexer, and it features eight channels of selectable inputs/outputs. The routing of common signal to independent I/O is set by digitally controlling three select lines, which can be set either high or low into one of eight binary combinations.

One half of the board breaks out the control signals (E, S0-S2) and common input/output (Z). The other side provides access to all eight independent I/O’s (Y0-Y7). Both sides include supply and ground connections (VCC, VEE, GND).

Get Started with the 74HC4051 Breakout Guide

• Switches analogue or digital signals
• 8 channels controlled by 3 select inputs
• Wide voltage supply range: 2 – 10V
• Bipolar supply support (e.g., ±5V)
• Optional enable input
• Breadboard compatible breakout

• Schematic
• Eagle Files
• Hookup Guide
• Datasheet (74HC4051)
• GitHub