I am using cyclone V FPGA. During my testing process, somehow I gave 12V to the IO bank instead of 3.3V. The board is shorted and I found FPGA has gone bad.
Now to prevent such accidents in the future I am configuring my power sequencer such that it will turn off the rail immediately as it sees a higher voltage.
The question is: if the power sequencer shuts down the voltage rail after 500ms after finding the fault, will this damage my device. How much time can an FPGA bear voltages above absolute maximum?