[sdiy] Making a 4066 deliver negative signals

[WeAreAs1 at aol.com]

In a message dated 9/7/04 6:14:39 PM, _nial_ at yahoo.com writes:

<< Hi all, newbie question; how do i (can ì?) make a 4066

deliver negative signals? Just connecting VSS to -V

instead of GND? I've got a +-9v supply (batteries),

this would make a total of 18vpp, would this fry the

4066? And last, would i have different levels for HIGH

vs LOW on the inputs? >>

Most people use a dual 7.5 volt supply to do what you are proposing.  You 
very well might be able to run that 4066 on +/- 9 volts, or maybe it will fry.  
I've seen them operating on +18 volts before, but I think that's right at (or 
over) the spec limit.  Why don't you just try it?  4066's are cheap.  If it 
doesn't work, you could build a simple little voltage divider with resistors to 
derive the +/- 7.5 volts from your 9 volt supplies (unless you feel compelled 
to use a couple of regulators).  There are also 4066-type switches from Maxim 
that can handle much higher bipolar signals and supply voltages, if you want to 
spend a little more money.

Michael Bacich