CD74HC4067 16-Channel Analog Digital Multiplexer Breakout Board Module

📋 Overview

Running out of input pins on your microcontroller? The CD74HC4067 breakout board lets you connect up to 16 analog or digital sensors to your microcontroller using just 5 pins. It works like an electronically controlled rotary switch — routing one common signal pin (SIG) to any of 16 channel pins (C0–C15) based on a 4-bit binary address you set on four select pins (S0–S3).

Signals flow in either direction, so the board works equally well as a multiplexer (many-to-one) or a demultiplexer (one-to-many). It handles both analog and digital signals, operates from 2V to 6V, and is compatible with Arduino, Raspberry Pi, ESP32, and virtually any 3.3V or 5V microcontroller.

⭐ Key Features

• 16 Channels, 5 Pins: Control 16 independent signal channels using S0, S1, S2, S3, and SIG — freeing the rest of your GPIO for other tasks.
• Analog & Digital: Works with analog voltage signals and digital logic signals — use it for sensors, buttons, serial lines, and more.
• Bidirectional: Signals flow in either direction — multiplex inputs or demultiplex outputs with the same board.
• Enable Pin (EN): Drive EN HIGH to instantly disconnect SIG from all channels — useful for power saving or bus isolation.
• Break-Before-Make Switching: Prevents channel-to-channel short-circuits during switching (6 ns at 4.5V).
• Low On-Resistance: 70Ω at 4.5V for clean signal switching with minimal voltage drop.
• Wide Supply Range: 2V to 6V — works with both 3.3V and 5V systems.
• Expandable: Cascade multiple boards for 32, 48, or 64+ channels using the EN pin for board selection.

🎯 Applications

• Reading 16 analog sensors (temperature, light, moisture, flex, force) with one Arduino analog pin
• Scanning 16 buttons or switches with a single digital input
• Routing TTL serial TX lines from 16 devices to one microcontroller RX pin
• Expanding I2C or SPI buses to multiple devices
• Data acquisition systems needing many analog channels on a single ADC
• Audio signal routing and switching circuits

📊 Specifications

⚠️ Important Notes

• Signal voltage must not exceed VCC. Any voltage on C0–C15 or SIG above VCC can permanently damage the chip. For 3.3V sensors on a 5V system, use a logic level converter on the signal lines.
• EN pin must be held LOW to operate. Do not leave EN floating. Connect it to GND to keep the chip always enabled, or drive it from a digital output pin for software control.
• One channel at a time. Only one channel connects to SIG at any moment — the CD74HC4067 cannot bridge multiple channels simultaneously.
• Unused channel pins should not float. Tie unused Cx pins to GND (analog) or a defined logic level (digital) to prevent noise on the SIG line.

📦 What's in the Box

• 1x CD74HC4067 CMOS 16-Channel Analog Digital Multiplexer Breakout Board
• Header pins

Breadboard, jumper wires, sensors, and Arduino-compatible microcontroller are not included.

📄 Documentation & Resources

• CD74HC4067 User Guide — Complete pinout, full channel addressing table (S0–S3 for all 16 channels), wiring diagrams, Arduino code example, tips, and troubleshooting.
• All Logic & Timing Module User Guides
  

Sold and supported by Envistia Mall. Ships from the USA. For complete setup instructions, wiring, and troubleshooting, visit the User Guide linked above. The manufacturer and Envistia LLC (dba Envistia Mall) are not responsible for any damages or losses resulting from the use of this product. Always follow proper electrical safety practices when working with electronic components. Specifications are based on manufacturer data and are subject to change without notice.