TCA9800: TIme requirements parameters of TCA9800

Hi Frank,

The timing requirements just means we ensure the device can support 100kHz at the minimum. Using the device at a slower frequency would also work. The device was designed with 400kHz in mind but may not meet rise time requirements depending on the loading on B side. (If cap loading is expected to be higher upgrading to the TCA9803 would likely allow you to support up to 400pF of cap while meeting I2C rise time requirements) If you want to ensure 400kHz frequency, then using one of the other devices in the family may be necessary. 

"For the rise time and fall time here,  it means input or output?"

The ports are pointed at in the column beside the rise and fall times. For example the first row of the rise time tells you that if you have a 1.35k pull up and a loading of 50pF, your expected rise time on port A is 57ns.

-Bobby