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.
2V to 6V operation
“On” resistance: 70 Ohms 4.5V
6ns break-before-make 4.5V
Wide operating temperature range: -55C to 125C
Function: gathering all the way ADC 16 analog signals.
Use CD74HC4067 16-channel analog signal switch
Analog Input: C0-C15 16 channels
Analog output: DIG
Channel Control: S0-S3