Re: [CAD_CAM_EDM_DRO] CMOS supply rails

On Thursday 04 November 2004 10:23 am, Bill Vance wrote:

> Howdy;
>
> I'm starting to get some parts and pieces together for some experimental
> DRO circuits, but I've got a question I haven't been able to find an answer
> to.
>
> The original A and B series CMOS chips, as well as the C series, (74CXX)
> have a plus Volts rating of +15 to +18 Volts. The HC series, (74HCXX),
> seems to be much easier to find than the C series, but the only data I've
> been able to find on them shows a +5 or +6 Volt supply rail. Does the HC
> series have the same rating as the others, but use the +5 or +6 Volt
> numbers to show compatability with TTL, or what?

The first data sheet I pulled up was for the 74HC00, which gave an operating
voltage range on the first page of 2 to 6 volts, and an absolute maximum Vcc
of 7 volts.