Re: gEDA-user: GND and Vcc pin on IC 74245

[Stephen Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

However... if one has only a paper schematic to work with while 
debugging a board then the hidden nets  don't tell you what voltage to 
expect at specific pins so debugging becomes harder.

Stephen Meier wrote:

> If one assumes that gnd and vcc are well defined and well known as in 
> the 74xx family removing them from the schematic makes the drawing 
> simpler.
>
> However this isn't always the case.
>
> Steve Meier
>
> Wilbert Knol wrote:
>
> > Could someone explain why logic ICs must not have Vcc and GND pins?
> > I have never seen a good reason for this. What is wrong with having 
> > Vcc and GND pins - like any other pin?
> >
> > Wilbert.
> >
> >
> >
> >