The PCA9548ADWR, manufactured by Texas Instruments, is an integrated circuit (IC) switch that provides 4 channels of I2C and SMBus multiplexing. It is a 4-channel I2C and SMBus multiplexer, each channel being capable of multiplexing to separate parts of an I2C bus. The device has an interrupt output for alerting the host of a particular I2C channel; it also has an automatic power-on reset solid state switch for the power up sequencing of the system. The device is configured and enabled via an I2C address, allowing up to eight devices to be present on the same I2C bus. The PCA9548ADWR is ideal for applications where multiple I2C masters are present and in need of high channel-count, high-speed, and low power multiplexing. The device's wide bus voltage range, low power consumption, and small package size make it suitable for use in a variety of IoT applications.