5v analog switch for 3.3v logic ok?
You can connect 3V signals to inputs of 5V devices and it should work. But you can't input more than 3V into a 3V powered device even if the said device can run on more than 3V.
As a general rule (except if otherwise explicitly mentioned in the datasheet) input voltages should never exceed the supply voltage of the device.
In the case you have a 5V signal which should be used as input into a 3V powered ic, use a resistor and a 3V zener diode  to limit the voltage, or two resistors to create a voltage divider.