TCA9548A 8-Channel I2C Expansion Board   


TCA9548A 8-Channel I2C Expansion Board   

TCA9548A 1-to-8 I2C 8-channel multi-channel expansion board IIC Module development board
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Details & Datasheets

SKU : 412 TCA9548A 8-channel expansion board.

A way to get up to 8 same-address I2C devices hooked up to one microcontroller.
Using it is fairly straight-forward: the multiplexer itself is on I2C address 0x70 (but can be adjusted from 0x70 to 0x77) and you simply write a single byte with the desired multiplexed output number to that port, and bam - any future I2C packets will get sent to that port. In theory, you could have 8 of these multiplexers on each of 0x70-0x77 addresses in order to control 64 of the same-I2C-addressed-part.
Like all Adafruit breakouts, we put this nice chip on a breakout for you so you can use it on a breadboard with capacitors, and pullups and pulldowns to make usage a snap. Some header is required and once soldered in you can plug it into a solderless-breadboard. The chip itself is 3V and 5V compliant so you can use it with any logic level.


  • Material: electronic element.
  • Color: black & purple.
  • Size: 31*21.5*2.5mm.