I have an application where
- The input signal sources are 5V. The supply is also 5V but may fall to say 3.3V in a fault condition. Therefeore the inputs may be over-driven but there are resistors to limit the current. How much current can be supplied in these circumstances without damage to the isolation properties of the part (I don't care whether the signal is being transmitted correctly)?
- Similarly in a fault condition the ouputs may be pulled-up beyound the supply but there are resistors to limit the current. How much current can be supplied to back-drive the outputs without damage to the isolation properties of the part (I don't care whether the signal is being transmitted correctly)?