[sdiy] CMOS Switch

[Peter Grenader]

This is the exact reason I switched to the MAXIM switches.  You don't have
to step them down  - they can handle +/- 15 VCC.  Plus, they will ship up to
32 samples of any given part within a six month period - how sweet is that?

I use their MAX333 in the VCO for the saw shaper with absolutely no hickups
and I was extraordinarily paranoid that using a switch would cause some
harmonic distortion. The 333 a is quad double (NO, NC, common, enable x 4).
Because of this, it's a 20 pin dip, but they have about 10,000 of them in
their product line so you should hunt around.  Blacet uses the single poles,
I'm sure he'd agree with me that they're the beez-kneez.

back to the pool,

- P



> Well, I was gonna use a 4066 but I've run into a snag.
> 
> Does anyone know of a cmos switch where the signal being switched can exceed
> VCC?
> 
> I've run into an interesting problem using 4066's.
> I need 60 switches.  I've got 2 registers out on this micro so 16 pins.  Was
> planning to use a 74C373 per pair of 4066's but max voltage of the 373 is of
> course 6volts and to switch the voltages I need ( -15volts ) I'll have to
> run the 4066 right up at supply rails, which means logic true is 15 volts...
> 
> Or maybe I'm missing something easy.