8.3 Feature Description

The TCA9548A is an 8-channel, bidirectional translating switch for I²C buses that supports Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation. The TCA9548A features I²C control using a single 8-bit control register in which each bit controls the enabling and disabling of one of the corresponding 8 switch channels for I²C data flow. Depending on the application, voltage translation of the I²C bus can also be achieved using the TCA9548A to allow 1.8-V, 2.5-V, or 3.3-V parts to communicate with 5-V parts. Additionally, in the event that communication on the I²C bus enters a fault state, the TCA9548A can be reset to resume normal operation using the RESET pin feature or by a power-on reset which results from cycling power to the device.