[sdiy] Re: Speaking of CMOS....

[Scott Gravenhorst]

Well, I'm far from a "master"...

If the protection diode scheme is the same as the 4007 
(the 4007 data sheet I have shows it), then that 3 volts 
will turn on a protection diode.  That's not a good thing,
so it might be best to buffer that so the drive comes from 
the same + supply as the 4053.  That way the gate can 
never be more positive than the 4053's Vdd pin.

Peter Grenader <petergrenader at mksound.com> wrote:
>I'm working with a 4053 that specs a 15 p-p volt max for analog information
>going through it.  It seems a pair of 8 voltge regulators did the trick. One
>of the signals going into it however will be from CMOS and is a 11 high
>static state logic enable signal.
>
>Would it be wise for me to  pop a PNP in there instead to keep the 11 volts
>the hell away form the 4052, given thats 3 volts higher than it's Vdd?
>
>I'm thinbking yes, but wanted some guidedance from the masters here.
>\thanks in advance,
>
>Peter
>
>
>

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