We ran into a situation where the above parts were unpowered (0 V, Vcc) yet the inputs coming from powered components were at 3.3V.
Would there be any potential overstress?
Are there any ESD protection diodes from the inputs to the supply rails, or anything else in these parts?
We’ve seen a functionality in other devices which sets the I/O to high impedance when VCC is below a certain range (approximately 0V). Can you confirm if that kind of high impedance functionality is or is not included in the design of these particular parts?