Analog Digital Multiplexer 16 Channel CD74HC4067

This chip is like a rotary switch - it internally routes the common pin to one of 16 channel pins. It works with both digital and analog signals and the connections function in either direction. To control it, connect 4 digital outputs to the chip's address select pins (S0-S3) to select the specific analog channel. This allows you to connect up to 16 sensors to your system using only 5 pins!
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$8.40

This chip is like a rotary switch - it internally routes the common pin to one of 16 channel pins. It works with both digital and analog signals and the connections function in either direction. To control it, connect 4 digital outputs to the chip's address select pins (S0-S3) to select the specific analog channel. 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 devices 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").


Specification

Input Voltage 2 - 6v
“On” Resistance 70Ω @ 4.5v
"Break-before-make" Time 6ns @ 4.5v
Operating Temperature -55°C to 125°C

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