[sdiy] Re: 7400 / 4000 series ICs--compatible?

[Phil Harbison]

Scott Gravenhorst wrote:
> Phil Harbison <alvitar at comcast.net> wrote:
> > 40xx:    Vdd ranges from +5V to +15V
>
> I've seen data sheets that show min. Vdd at 3V.

I should have been more specific. They minimum Vdd is 3V but
the parts are characterized at +5V and +15V, i.e. they specify
propagation delays and setup and hold times at those voltages
and not at the extreme range of Vdd.