[sdiy] Speaking of CMOS....

[René Schmitz]

At 14:49 29.04.02 +0200, jorgen.bergfors at idg.se wrote:
>
>>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?
>
>Buchla just put a 1M resistor in series with the signal and let the
>built-in input protection diodes do their thing. Nasty, but works.

If you want to do it right, interpose a 4050/4049 buffers/invertor its 
noted in the Datasheet that they can be driven from voltages higher than 
Vdd. Though I think a current limiting resistor is still neccessary.

Cheers,
 René
-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159