The7SEMI TCA9543A I2C MUX Boardis alow-voltage, 2-channel IC bus switchdesigned for applications where address conflicts or IC expansion is needed. Built around Texas InstrumentsTCA9543A, this board allows a single I2C master to control multiple slave buses with independent interrupts and reset support.
With support for1.65V5.5V logic,voltage-level translation, andhot-swap tolerance, this compact breakout is ideal forsensor networks,multi-sensor gateways,debugging tools, andindustrial monitoring.
Key Features

2-Channel Bidirectional IC Switching

Voltage Translationbetween 1.8V, 2.5V, 3.3V, and 5V buses

IC Controlled Channel Selectionwith dedicated address bits

Interrupt Support: Two independent interrupt inputs (INT0, INT1) and one combined output

RESET Inputto recover from stuck bus scenarios

Compatible with SMBus and Standard/Fast I2C (up to 400kHz)

5.5V-Tolerant Inputswith low standby current

Qwiic-Compatible Header Pins

Operating Voltage: 1.65V 5.5V

Applications

Connect multiple IC devices with thesame addresson a single controller

Interface withmulti-sensor arraysin smart farming, weather stations, or industrial IoT

PerformIC bus isolation and debuggingduring development and testing

Control separatesmart home or building automation zoneswith identical sensors

Expand IC peripherals inrobots, drones, and embedded systems

Switch betweenIC-controlled displays, actuators, and EEPROM banks

Whats Included

1x TCA9543A I2C MUX Board

Resources

TCA9543A Datasheet