The TCA9548A can support I2C bus frequencies up to 400 kHz.
No, the TCA9548A is specifically designed for I2C bus multiplexing and is not compatible with other bus types.
The TCA9548A has a control register that allows you to enable or disable individual channels through I2C commands. See the datasheet for specific register addresses and bit assignments.
There is no theoretical limit to the number of TCA9548A devices that can be cascaded, but the maximum number of devices that can be addressed on the I2C bus is 127.
The TCA9548A has built-in bus contention resolution mechanisms, including arbitration and clock stretching. See the datasheet for more information on how to handle bus contention.