Enhanced Connectivity: This PCA9546 4-Channel I2C Multiplexer is the perfect solution for projects requiring multiple I2C devices. It allows up to four I2C devices to communicate with your main controller, such as ESP32, for , or for , without address conflicts. Qwiic Compatible: Features a Qwiic connection system enabling quick and reliable hook-up with other Qwiic devices. This plug-and-play functionality simplifies prototyping and development, saving you time and effort. Wide Compatibility: Designed to be universally compatible with a variety of microcontrollers including ESP32, ensuring seamless integration into your existing projects. Easy to Use: No complex configuration needed. It's ready to use out of with minimal setup, making it ideal for both beginners and experienced enthusiasts. Technical parameters Chip model: PCA9546APW Number of I2C channels: 4 channels Main I2C address: 0x70 (default) Voltage range: 2.3V - 5.5V Maximum I2C rate: 400 kHz (Fast Mode) Interface type: for STEMMA QT / Qwiic + pin header Core functions 4-channel switching 1 I2C master device → control 4 groups of I2C slave devices. Solve I2C address problems (such as connecting multiple identical sensors). Hot plug support Standby current is only 1μA, energy saving. Working voltage: 2.3V-5.5V, support 3.3V/5V system (such as for /for ). For STEMMA QT / Qwiic 4-pin interface: no soldering, quick connection to the development board Standard 2.54mm pin header: compatible with breadboards and PCBs. Application scenarios: Connect multiple identical I2C devices at the same time (such as OLED screens, temperature and humidity sensors). Expand the number of I2C interfaces of for /for . Build modular sensor networks (environmental monitoring, robot perception systems) Color:As Shown Material:PCB Package Contents: 1 * PCA9546 Module 1 * pin header (need to be soldered) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.