# 16-channel multiplexer module

> 16-channel multiplexer/demultiplexer module based on the CD74HC4067 chip. Operates at 3-6VDC and supports both analog and digital signals. Channel selection (CHAN00-CHAN15) is done via binary addressing on pins S0-S3, while the EN pin allows fully enabling or disabling the connections. Compatible with Arduino and other development boards, useful for expanding a microcontroller's I/O pins and for multiplexing sensors.

- Page: https://sigmanortec.ro/en/16-channel-multiplexer-module
- Price: 4.76 RON
- Availability: In stock; 1-2 zile
- Reference: 22165 · EAN: 5947345382499
- Category: Mechatronics and IoT > Sensors and Modules > Expansion Module
- Package (shipping data): 0.002 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Description

Quickly expands the number of inputs or outputs of the microcontroller, allowing reading or switching of up to 16 channels through a single signal pin. Based on the CD74HC4067, it supports analog and digital signals, operates at 3-6V and is compatible with Arduino and other development boards. Channel selection is simple via 4 address pins, and the EN pin allows quick activation or deactivation.
16CH multiplexer module, CD74HC4067, for reading up to 16 channels on a single signal line, compatible with Arduino and other development boards. The module works with both Analog and Digital signals.
This efficient solution helps you save valuable pins on the microcontroller, making it ideal for applications with many inputs/outputs, without compromising performance or flexibility.
This breakout board is built around the CD74HC4067 chip, a versatile 16-channel multiplexer/demultiplexer, ideal for extending the number of analog and digital inputs or outputs available on a microcontroller. Acting as an internal rotary switch, the chip allows connecting the common pin (SIG) to any of the 16 channels (CHAN00–CHAN15), based on a binary signal sent through the selection pins (S0–S3). The board supports both digital and analog signals (voltage between GND and VCC) and allows bidirectional communication.
Thanks to this functionality, the board is perfect for projects involving sensor multiplexing, switching serial communication lines (e.g., TTL), or even interfacing with protocols like I2C or SPI by adding multiple boards. Additionally, the enable pin (EN) output allows complete deactivation of the connection between the common pin and individual channels, offering advanced control over signal traffic.
Allows "break-before-make" switching to reduce interference.
Specifications:
Supply voltage: 3 - 6VDC
Chip: CD74HC4067
Number of channels: 16 (CHAN00 – CHAN15)
Compatible with signals: Digital and analog
Operating voltage: between GND and VCC
Channel selection control: digital pins S0 – S3 (binary addressing)
Enable pin (EN): breaks all connections when set HIGH
Connections:
CD74HC4067 Pin
Function
Connected to Arduino Uno
VCC
Power supply +5V or +3.3V
5V
GND
Ground
GND
SIG
Common signal (analog/digital I/O)
A0 (or other analog pin)
S0
Address selection - bit 0
D4
S1
Address selection - bit 1
D5
S2
Address selection - bit 2
D6
S3
Address selection - bit 3
D7
EN (Enable)
Chip enable (LOW = active)
GND (or a digital pin if control is desired)
Usage:
Connect the SIG pin to the common line of the system (for example, an analog or digital input of the microcontroller).
Connect the S0–S3 pins to the digital outputs of the microcontroller and send the binary address of the desired channel.
Connect external devices or sensors to the CHAN00–CHAN15 pins.
(Optional) Use the EN pin to completely disable switching when needed.
Channel selection is done in binary mode via the selection pins S0, S1, S2, S3, where S0 is the LSB (least significant bit) and S3 is the MSB (most significant bit). Below is the addressing table for all channels:
Channel
S3
S2
S1
S0
Binary value
CH0
0
0000
CH1
0
1
0001
CH2
0
1
0
0010
CH3
0
1
0011
CH4
0
1
0
0100
CH5
0
1
0
1
0101
CH6
0
1
0
0110
CH7
0
1
0111
CH8
1
0
1000
CH9
1
0
1
1001
CH10
1
0
1
0
1010
CH11
1
0
1
1011
CH12
1
0
1100
CH13
1
0
1
1101
CH14
1
0
1110
CH15
1
1111
Recommendations:
Add a 100nF capacitor between VCC and GND, as close as possible to the chip, to reduce electrical noise.
Make sure that the input signal voltages do not exceed VCC (usually 5V or 3.3V).
For reading buttons or other digital signals, configure the SIG pin as INPUT_PULLUP and interpret the read values as HIGH or LOW.