I've been looking into different Analog Switch ICs and it seems they always allow a switching voltage between GND-VCC. Now the voltage I want to switch comes from a different source than VCC. Generally it should be aprox. the same as VCC but the exact voltage is always unkown and can be between 4.5-5.5v. Vcc is rated to be 5v. All switches I found are rated for a max. VCC of 5.5v or higher.
Now does it pose a problem if my switching voltage is slightly higher than VCC in some cases? I'm a bit confused that VCC is the limit when these ICs are just using MOSFETs internally.
The grounds of both voltage source are of course connected.