Descriptions:

• 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

Package Included:

• 1 x 16CH Analog Digital MUX Breakout Board CD74HC4067 Precise Compatible Arduino