CD74HC4067 16-channel analog and digital multiplexer demultiplexer breakout board What it is - A breakout board for the CD74HC4067 16-channel analog/digital multiplexer demultiplexer - Provides one common connection and sixteen channel connections for flexible signal routing Key features and benefits - 16 channels C0 to C15: Each channel can be connected to the common pin one at a time - Common pin COM (SIG on the board): The single line that is routed to one of the 16 channels - Channel control S0 to S3: Four select lines determine which channel is connected to COM - Analog and digital signals: Works with both types of signals; support for either direction of signal path - Bidirectional operation: Signals can flow from COM to a channel or from a channel to COM - Simple control: Use four digital lines to select any one of the 16 channels - Breakout board format: Easy to integrate with existing circuits and prototypes How it works - The device functions like a rotary switch that internally connects the common pin (COM in the schematic, SIG on the board) to one of the 16 channel pins (CHAN0 through CHAN15) - The selected channel is controlled by the binary value on S0, S1, S2, and S3 - The voltage on any channel cannot exceed VCC, and the connections operate in either direction Compatibility and usage - Compatible with the CD74HC4067 multiplexer/demultiplexer - Suitable for projects requiring rapid switching between multiple signals using a single I/O or ADC/DAC input - Ideal for prototyping and hobbyist projects as well as educational demonstrations that involve signal routing Use scenarios - Scenario 1: Sensor array readout - Connect 16 different analog sensors to C0–C15 - Use a single ADC input to sequentially read each sensor by setting S0–S3 to select the desired channel - Scenario 2: Digital signal scanning - Multiply digital inputs to a single microcontroller input - Scan each digital line by selecting the corresponding channel and reading the COM line - Scenario 3: Prototyping and signal routing - Route any of 16 signals to a common test point for quick testing and measurement - Useful in breadboard setups to minimize wiring and pin usage Notes - Ensure that the signal voltage does not exceed VCC on the breakout - COM is the single connection that links to one of the 16 CHAN pins at a time - CHAN0 to CHAN15 correspond to C0 to C15 as labeled on the CD74HC4067 This description preserves the original product brand, model, and functional details while presenting clear benefits, practical usage, and concrete scenarios for everyday applications.