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The Electroboat CD74HC4067 Breakout Board mounts Texas Instruments' high-speed CMOS 16-channel analog multiplexer/demultiplexer IC. Designed to solve pin-limitation challenges on microcontrollers like Arduino, ESP32, and Raspberry Pi, this module allows a single ADC pin or digital I/O pin to communicate with up to 16 external sensors or actuators.

The onboard switches feature low "ON" resistance (~70 Ω at 4.5V) and "break-before-make" timing to prevent channel crosstalk during transitions. It is fully bidirectional, enabling it to route signals from 16 sensors to 1 microcontroller input pin, or conversely, route 1 control signal output to 1 of 16 targets. It also breaks out an active-low Enable (EN) pin to completely disconnect all channels when pulled HIGH.

Key Features and Benefits

• 16-to-1 I/O Multiplexing: Reads up to 16 analog or digital inputs using only 5 microcontroller pins (1 Signal + 4 Address).

• True Bidirectional Operation: Works both as a multiplexer (16 inputs to 1 output) and demultiplexer (1 input to 16 outputs).

• Wide Operating Voltage (2V–6V): Fully compatible with both 3.3V and 5V microcontrollers (ESP32, STM32, Arduino, Raspberry Pi).

• Low Resistance & Break-Before-Make: Low ~70 Ω ON-resistance minimizes signal loss and 6 ns transition delay prevents crosstalk.

• Active-LOW Enable Pin: Dedicated EN pin allows disabling all 16 channels simultaneously for power saving or chip selection in cascaded setups.

Technical Specifications

How to Use

1. Power Connections: Connect VCC to 3.3V or 5V DC and GND to common system ground.

2. Control Lines: Connect binary address select pins S0, S1, S2, and S3 to 4 digital output pins on your microcontroller.

3. Signal Connection: Connect the common signal pin (SIG or COM) to your microcontroller's analog pin (e.g., A0) or digital pin.

4. Channel Connection: Connect up to 16 sensors, potentiometers, or switches to pins C0 through C15.

5. Channel Selection: Drive S0–S3 HIGH or LOW to select the target channel using binary representation (e.g., S3..S0 = 0000 for Channel 0; 1111 for Channel 15). Keep EN LOW or grounded to keep switches active.

Applications

• Multiplexing multiple Analog Sensors (LDRs, Thermistors, Potentiometers) to a single ADC pin

• MIDI Controllers, Synthesizers, and Audio Mixing Desks

• Digital Switch Matrices and Keyboard Scanners

• Serial Data Routing (multiplexing RX/TX lines to multiple devices)

• Test Fixtures, Automated Measurement, and Data Acquisition Systems

Package Includes

• 1 x CD74HC4067 16-Channel Multiplexer Breakout Board

• 2 x Straight Male Header Strips (Unsoldered)

Shipping & Delivery

• Free shipping on orders above ₹999 across India.

• Dispatched within 1-3 business days.

• Expected delivery: 3-7 business days depending on location.

• Secure ESD and cushioned packaging to ensure safe transit of electronic components.