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Description
- This is a breakout board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067. This chip is like a rotary switch - it internally routes the common pin (COM in the schematic, SIG on the board) to one of 16 channel pins (CHANxx). It works with both digital and analog signals (the voltage can't be higher than VCC), and the connections function in either direction. To control it, connect 4 digital outputs to the chip's address select pins (S0-S3), and send it the binary address of the channel you want (see the datasheet for details). This allows you to connect up to 16 sensors to your system using only 5 pins!
- Since the mux/demux also works with digital signals, you can use it to pipe TTL-level serial data to or from multiple devices. For example, you could use it to connect the TX pins of 16 devices to one RX pin on your microcontroller. You can then select any one of those 16 devices to listen to. If you want two-way communications, you can add a second board to route your microcontroller's TX line to 16 device's RX lines. By using multiple boards, you can create similar arrangements for I2C, SPI, etc.
- The internal switches are bidirectional, support voltages between ground and VCC, have low "on" resistance and low "off" leakage, and to prevent crosstalk, perform "break-before-make" switching. The board also breaks out the chip's "enable" pin, which when driven high, will completely disconnect the common pin (all switches "off").
Features:
- 16-channel Analog/Digital Multiplexer/Demultiplexer IC (CD74HC4067)
- Can connect up to 16 analog sources (sensors) to just 5 pins on a micro-controller
- Requires 4 digital pins and 1 analog-to-digital conversion pin for communication
- Compatible with digital signals (serial, I2C, SPI) for easy distribution of signals to multiple outputs
- Can control analog voltages that vary across the voltage supply range
- Bidirectional switches allow any analog or digital input to be used as an output and vice-versa
- "Break-Before-Make" switching of 6ns at 4.5V
- Low "on" resistances and low "off" leakages for efficient and reliable signal switching
- Includes enable control to disable all switches to their "off" state when high
- Breakout board form factor for easy prototyping and breadboarding.
Specification:
- ON Resistance: 70Ohms @ 4.5Vcc and 60Ohms @ 6VCC
- Operating Voltage: 2 to 6V
- Wide operating temperature: -55 to 125 Deg C
- Dimension: 25 x 18mm
Applications:
- Sensor arrays: Since the IC allows you to connect up to 16 analog sensors to just 5 pins on a microcontroller, it is great for building sensor arrays. You can use this to measure various physizcal quantities such as temperature, pressure, humidity, light levels, etc.
- Data acquisition: With the ability to interface with multiple sensors and devices through just a few pins on a microcontroller, the MUX 16 Channel Analog Multiplexer 74HC4067 RED is a useful tool for data acquisition projects. You can use it to read and record data from multiple sources simultaneously.
- Signal routing: You can also use this IC as a signal router for digital signals such as serial, I2C or SPI. By connecting one serial stream to the SIG pin, you can easily distribute the signal to multiple outputs.
- Industrial control systems: The MUX 16 Channel Analog Multiplexer 74HC4067 RED can be used in industrial control systems for tasks such as automation, monitoring and control.
- Audio signal routing: Since the IC can handle analog signals, it can be used for routing audio signals as well. For example, you could use it to switch between multiple audio sources or to send a single audio source to multiple outputs.
Pin Connections:
| Pin | Description |
|---|---|
| C0 - C15 | Analog input/output channel 0 - 15 |
| GND | Ground connection (0V) |
| VCC | Power supply connection (+5V) |
| EN | Enable control input. When high, all switches are disabled (off state). |
| S0 - S3 | Address selection input 0 - 3 |
| SIG | Signal input/output. Serial data input when used as a demultiplexer, serial data output when used as a multiplexer. |
Package Includes:
- 1 x MUX 16 Channel Analog Multiplexer 74HC4067 RED
Notes:
- When using the MUX 16 Channel Analog Multiplexer 74HC4067 RED is that the maximum input voltage that can be applied to any analog input/output channel is equal to the voltage of the VCC pin. Exceeding this voltage can damage the IC and/or your microcontroller.