CD74HC4067 High Speed CMOS 16-Channel Analogue/Digital Multiplexer Breakout Module

Product Description The CD74HC4067 is a high-speed CMOS 16-channel analog/digital multiplexer/demultiplexer breakout module. This versatile component acts like a rotary switch, routing a common signal (SIG) to one of 16 individual channel pins (C0-C15) based on the binary input of four select pins (S0-S3). Because it is a bi-directional analog switch, it works with both digital signals (like serial or I2C) and analog signals (like sensors or potentionmeters) in either direction. It is the industry standard for expanding the I/O capabilities of microcontrollers with limited pins, such as the Arduino Nano or ESP8266, allowing you to read up to 16 sensors using just one analog input.

Key Features

• 16-Channel Expansion: Connect up to 16 devices to a single signal pin, significantly increasing the I/O capacity of any microcontroller.

• Bi-directional Switching: Signals can flow from the common pin to the channels or vice-versa, supporting both input and output applications.

• Wide Voltage Range: Operates reliably between 2V and 6V, ensuring compatibility with 3.3V and 5V logic systems.

• High Bandwidth: Supports high-speed signals up to 89 MHz, making it suitable for fast digital data transmission and audio.

• Enable Pin Control: Features a dedicated Enable (EN) pin to disconnect all channels simultaneously, allowing for multiple-chip daisy-chaining.

Technical Details

• Switching Logic: Uses a 4-bit binary addressing system via S0, S1, S2, and S3 to select the active channel.

• Low On-Resistance: Features a typical resistance of 70 Ohms at 4.5V, ensuring minimal signal degradation for analog readings.

• Analog/Digital Versatility: Capable of switching voltages across the full supply range (VCC to GND).

• Break-Before-Make Switching: Integrated internal logic prevents momentary shorting between channels during the selection process.

• Ultra-Low Leakage Current: Maintains high signal integrity with very low off-state leakage, ideal for sensitive sensor arrays.

• Digital Signal Support: Can multiplex UART, I2C, and other digital protocols for multi-device communication.

• Propagation Delay: Extremely fast response time of approximately 6ns at 4.5V for high-frequency switching.

• High-Density Breakout: Compact PCB design with standard 2.54mm pitch headers for easy breadboard and PCB integration.

• Power Dissipation: Efficient CMOS technology ensures negligible power consumption in steady-state operation.

• Input Protection: Includes internal diode protection against electrostatic discharge (ESD) on all signal pins.

• Operating Temperature: Industrial grade performance stable from -55°C to +125°C.

• Daisy-Chain Capability: Multiple modules can be linked together using the EN pin to control 32, 64, or more channels.

• Logic Level Compatibility: Direct interface with standard TTL and CMOS logic families.

• Crosstalk Rejection: High isolation between channels (-50dB) ensures that signal interference is virtually non-existent.

• PCB Construction: High-quality FR-4 material with clear labeling for all selection and signal pins.