[sdiy] Run standard CMOS on 3.3 volts?

[WeAreAs1 at aol.com]

In a message dated 8/11/04 1:49:57 PM, rtarcan at superonline.com writes:

<< Yes it works. But the  nonlinearity of the on resistor (the resistor 
when the 4066 swiched on)and the on resistor value increases...
increases. It best works on 15 volt. (low on resistor and nonlinearity)
Cheers
. .
 >>

Hello guys,

Thank you for your responses.  I'm glad that the old standard part will work. 
 I'm trying so very hard to keep from ever having to use surface mount parts. 
 So far, so good.  I'm hoping that the ON resistance at that low power supply 
voltage will be low enough for my application (switching digital signals from 
a front panel switch matrix to simulate button presses).  If not, I will 
simply parallel two or more 4066 switch sections, which should effectively lower 
the total ON resistance.  Since I'm just gating some low-to-medium speed 
digital signals, I don't think linearity of the switch element is going to be an 
issue.

I am kind of surprised that none of the data sheets I found for the 4066 or 
4016 specified a minimum operating supply voltage.  They do give various 
measurements and parameters at 5 volts, but they don't mention that the chip can be 
used at lower voltages.  Maybe it's because the data sheets were created back 
before people started designing stuff around 3.3 volt supplies?  Or maybe.... 
it's because they just want us to purchase the specialized (more expensive) 
3.3 volt parts?  Well, I'm not going to be tricked by them.  When I come out 
with my new line of cell phone/PDA's, they're going to be built with all 
through-hole parts, discrete logic, and the polyphonic ring tone generator is going to 
be pure analog -- probably something like a 16-voice ASM-1, except with more 
modulation routing options.  Stay tuned.

Michael Bacich