The Adafruit PCA9548 8-Channel STEMMA QT / Qwiic I2C Multiplexer – TCA9548A Compatible that enables connection of up to 8 devices with the same I2C address to a single microcontroller. Ideal for scenarios where I2C devices have fixed addresses, it uses I2C to select which device to communicate with. The board is designed for easy connection with STEMMA QT/Qwiic components, making it simple to add more devices to your project without soldering. Additionally, it includes an onboard 3.3V regulator, making it suitable for both 3.3V and 5V microcontrollers.

Features:

1. Eight independent I2C channels for connecting multiple devices with identical addresses
2. TCA9548A/PCA9548A compatible for wide software and library support
3. Default I2C address 0x70, configurable to 0x77 via solder jumpers
4. 3 V–5 V supply range with onboard 3.3 V 500 mA regulator and level shifting
5. STEMMA QT / Qwiic JST-SH connectors for easy, solder-free plug-and-play connections
6. Power indicator LED for quick status check
7. Compact PCB (~40.6 mm × 20.2 mm) with mounting holes
8. Works with Arduino, Raspberry Pi, and Circuit Python libraries
9. Reduces bus loading and crosstalk, ensuring stable multi-sensor communication

Package Include:

1 x Adafruit PCA9548 8-Channel STEMMA QT / Qwiic I2C Multiplexer – TCA9548A Compatible