Greetings,
I would like to use the TCA6408A in my application; however, I have a question about the IO protection on the device. My application has certain processing running all of the time and other processes running only some of the time. To save power, we pull power from the processes that don't need to be running. Therefore, it may be possible for the input IOs to the TCA6408A to be transitioning while the TCA6408A itself is powered down (both VCCP and VCCI would be 0V).
The IOs would not be transitioning above 5.5V or anything, they would be no more than 1.8V, but I wondered how the IO interface would hold up to the higher voltages on the IO pins while the rest of the TCA6408A device is powered down.
Can anyone speak to this?