MUX74HC4067 Tutorial from codebender on Vimeo. This is a tutorial on the MUX74HC4067 library. The name of the library refers to the IC that is on the Analog/Digital MUX Breakout from Sparkfun. This IC is a 16-channel analog multiplexer/demultiplexer. You can think of it as an SP16T switch that is digitally controlled. You position the