We have a circuit showing some odd behavior. The first problem is that there were times when VSS was left floating for some period of time on the ADG1404. Now we have grounded it but it still looks as if there is a 300K path to ground through the switch. Could we have damaged it?
Thanks for the reply David.
The switch IO never exceeded the limits with respect to Vdd. Vss was floating so I'm not really sure what the relationship was. The IO should have been either 0V or 3.3V in this application.
As it turns out the switches behave as expected when Vss is properly tied to a level, GND in this case.