The PCA9543ADR from Texas Instruments is a high-performance, low-voltage dual-channel I2C bus switch with an interrupt logic.

• Supply Voltage: Operates from a 2.3V to 5.5V supply voltage
• Interrupts: Features two active-low interrupt inputs and an active-low interrupt output
• I2C Bus Switch: Has a dual 2-to-1 multiplexer/demultiplexer I2C bus switch
• Stand-by Current: Has an incredibly low stand-by current
• Channel Selection: Has two separate I2C-bus/SMBus channel selection via the bus master
• Reset: Has an active HIGH reset input
• Address Phase: Designed with an acknowledge on the address phase
• Interrupt Status Register: Yes
• RoHS Compliant: Yes
• Package: Comes in a compact SOIC package
• Operating Temperature: Designed to operate over the extended industrial temperature range of -40°C to +85°C