CJMCU-9548 TCA9548 1-to-8 I2C 8-Way Multi-channel Expansion Board

The CJMCU-9548 TCA9548 1-to-8 I2C 8-Way Multi-channel Expansion Board is an I2C bus multiplexer that allows a single I2C host to control up to eight separate I2C channels. The board preserves the original I2C bus protocol while providing independent channel selection so multiple devices with identical I2C addresses can be used on the same host bus without address conflicts.This expansion board provides a straightforward hardware interface for projects that require increased device capacity or isolation between I2C peripherals. Each channel can be selected by the host controller through standard I2C register commands to enable communication with devices on that channel while the other channels remain isolated. The board is convenient for development, prototyping, and deployment scenarios where scalable I2C connectivity or address duplication presents a constraint.Typical applications include sensor arrays, multi-module systems, test benches, and embedded designs where multiple identical sensors or modules must coexist. The compact module form factor makes it simple to integrate into breadboard or custom PCB setups and to combine with common microcontroller platforms and I2C-compatible devices. The CJMCU-9548 is useful whenever controlled channel switching, bus expansion, or logical separation of I2C devices is required.