Omer wrote...

>The analog switches that I have recently found, opened a new window for me.
>Could I use the analog switches, like MAX323, like a relay?  To better
>explain what I am thinking, if I have circuit that works with 3V, could I
>use the switch to close and open a 24V line coming from outside world, thus
>imititating the SPST relay?

Nearly all analog switches allow switching of analog signals ONLY
within the supply voltage boundaries; that is, the analog signal
must be "between the rails" at all times.

In the case of the MAX323, the data sheet gives a signal range of
-0.3V to (V+ +0.3V) in its ABSOLUTE MAXIMUM RATINGS section,
indicating that going outside this range may permanently damage
the device.

So, switching a 24 volt line with a MAX323 powered from 3 volts
would not work.

HTH...

Dave D.

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