The 7Semi TCA9548A I2C MUX Module is a compact and efficient solution for expanding I2C communication in embedded electronics projects. Built around the reliable TCA9548A I2C multiplexer IC, this module allows a single microcontroller to communicate with up to 8 independent I2C channels. It is especially useful when working with multiple sensors or peripherals that share the same fixed I2C address.
Instead of modifying hardware addresses or redesigning circuits, the module enables seamless software-controlled channel switching, making integration simple and flexible. It works perfectly with Arduino, ESP32, STM32, Raspberry Pi, and other popular development platforms. The board provides stable signal routing, reliable communication, and easy expansion for advanced sensor networks, automation systems, robotics, and IoT applications.
Whether you are building environmental monitoring systems, multi-sensor data loggers, industrial automation devices, or educational electronics projects, the 7Semi TCA9548A module helps simplify complex I2C connectivity challenges while saving development time and PCB space.
Features
• 8 independent I2C channels for connecting multiple devices
• Eliminates I2C address conflicts between identical sensors and modules
• Software-selectable channel switching through standard I2C commands
• Compatible with Arduino, ESP32, STM32, Raspberry Pi, and similar controllers
• Stable and reliable communication for sensors, displays, EEPROMs, RTCs, and more
• Reset pin support for quick recovery and bus management
• Compact PCB layout suitable for embedded and portable applications
• Supports low-voltage and standard-voltage I2C systems
• Easy integration into IoT, robotics, industrial, and automation projects
• Ideal for multi-sensor arrays and scalable embedded designs
Resources
- IC used:
- TCA9548APWR
- Bus Channels:
- 8 I2C downstream channels
- Control Interface:
- I²C
- Address Select:
- Configurable via A0–A2 pins
- Reset Input:
- Active-low RESET pin
- Operating Voltage:
- 1.65V to 5.5V
- Max Clock Frequency:
- 400kHz (Fast-mode I²C)
- Board Dimensions:
- 18mm x 13mm
- Board Weight:
- 2g
- _3d_glb:
- https://7semi.com/content/3d-files/dfx_step/10352.glb
