Re: gEDA-dev: GAF wish list addition - complex boards having multiple logic families

[Dan McMahill <dan@xxxxxxxxxxxx>]

Carlos Nieves Ãnega wrote:
> El dom, 03-09-2006 a las 15:33 -0400, DJ Delorie escribiÃ:
> > Would it be sufficient to save "level=5t" (5 volts TTL) or "3.3c" (3.3
> > volts CMOS) ?
>
> What about HC, HCT, ECL, LVC and all the logic families out there?
> I can also have some HC with 3V supply, or even 2V7...

and with ECL, older ECL parts ran with VCC=0 and VEE=-5.2 volts.  But it 
wasn't that unusual to see them powered with VCC=5V and VEE=0.  That was 
my first exposure to the joys of implicit power pins....

I think it's going to be hard at best to come up with a foolproof scheme.

-Dan



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