The SparkFun Qwiic Mux Breakout (TCA9548A) is an 8-channel multiplexer that solves I2C address conflicts, allowing you to easily connect up to eight devices with the same address using the Qwiic system.
Special Order
Shipping from $2.90
+192 more from our supplier in 7-10 days
Our Code: SKU-006511
Supplier Link: [SparkFun MPN:16784]
Have you ever found the perfect sensor, only to discover that it has the same I2C address as another device on your bus? Or worse, you need to connect eight identical sensors to one microcontroller? The SparkFun Qwiic Mux Breakout is the simple, powerful solution to this all-too-common problem.
This breakout, centred around the TCA9548A multiplexer, acts like a digital 8-channel rotary switch for your I2C bus. It allows you to connect up to eight I2C devices that share the same address and communicate with them individually, all over a single I2C port.
To make it incredibly easy to use, this board is fully integrated into our Qwiic Connect System. It features 10 Qwiic connectors: 2 for the main bus (for daisy-chaining) and one for each of the eight multiplexed channels. This means you can build a complex I2C network without soldering a single pin.
Operation is simple: send a single I2C command to the Mux to select which channel (0-7) you want to talk to. All future I2C communication will then be routed to that specific port, ignoring the other seven.
But what if eight channels aren't enough? We've got you covered. The Qwiic Mux Breakout has eight configurable I2C addresses of its own, selected via three solder jumpers on the back (labelled "ADR"). By simply adding a blob of solder, you can change the Mux's own address.
This allows you to connect up to eight Qwiic Mux Breakouts to the same microcontroller, giving you control over a staggering 64 identical-address devices.
For those who prefer traditional breadboarding, we've also broken out all the pins to a standard 0.1"-spaced header. The breakout operates across a wide voltage range from 1.65V to 5.5V, making it ideal for interfacing with all our 3.3V Qwiic boards as well as 5V logic devices.
Revision Changes: With this revision of the SparkFun Qwiic Mux Breakout, we have only made one change to improve the ease of use of the board, listed below. If users are unsure about which version they purchased, please refer to the product pictures.
Brands
