[sdiy] CMOS Switch

[James Patchell]

I use the DG201 analog switch.  It will switch signal of +/- 15 volts, 
requires only +/-15 volt power supplies, and is controlled by normal 
TTL/CMOS logic levels (0->5V)....They are a little more pricey than a 
CD4066, but you can get them easily from either Digikey or Mouser.  And 
they will give you a lot fewer headaches.

At 12:13 PM 9/5/2004 -0700, Tom Arnold wrote:
>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.
>
>--
>  ------------------------------------------------------------------------
>  - Tom Arnold -       When I was small, I was in love,                  -
>  - Sysabend   -       In love with everything.                          -
>  - CareTaker  -       And now there's only you...                       -
>  --------------         -- Thomas Dolby, "Cloudburst At Shingle Street" -

         -Jim
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