CD74HC4067 16 Channel Analog Digital Multiplexer Demultiplexer Breakout Board Module

The CD74HC4067 16-Channel Analog and Digital Multiplexer Breakout Board This breakout board is built around the CD74HC4067 chip, a high-speed CMOS analogue and digital multiplexer and demultiplexer. It works like a rotary switch, internally routing a common pin to one of sixteen channel pins, allowing you to expand the input and output capabilities of your microcontroller project. Because it handles both analogue and digital signals, it offers a flexible way to manage multiple devices through a single set of control pins. Expanding Your Microcontroller Connections The board lets you connect up to sixteen sensors or devices to your system using just five pins. By connecting four digital outputs from your microcontroller to the address selection pins, labelled S0 to S3, you can send a binary address to choose which of the sixteen channels is active. This makes it straightforward to read from multiple sensors or control several outputs without dedicating a separate pin to each one. Managing Serial and Digital Communication As the multiplexer can process digital signals, you can use it to transfer serial data to TTL levels across multiple devices. For example, you could connect the transmit pins of sixteen devices to a single receive pin on a microcontroller, then select which device should be listened to at any given time. If you need bi-directional communication, a second board can be added to route the microcontroller's transmit line to the receive lines of the sixteen devices. Multiple boards can also be arranged to support protocols such as I2C and SPI. Simple Wiring and Flexible Use The board is clearly laid out with a common pin and sixteen channel pins for easy wiring. It can process both analogue and digital signals, provided the voltage does not exceed VCC, and can be connected in either direction. This makes it a practical choice for projects that need to expand sensor inputs, manage multiple serial connections, or route signals in a compact and efficient way.