Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!tikal!sigma!bill
From: bill@sigma.UUCP (William Swan)
Newsgroups: sci.electronics
Subject: Re: TTL (and other) families
Message-ID: <1457@sigma.UUCP>
Date: 15 Jan 88 22:30:55 GMT
References: <2040@navajo.UUCP>
Reply-To: bill@sigma.UUCP (William Swan)
Organization: Summation Inc, Kirkland WA
Lines: 14

In article <2040@navajo.UUCP> bjork@navajo.UUCP (Steven Bjork) writes:
>[...]
>74HCT   This is 74HC fully spec'ed to replace 74LS. Actually, at higher
>        frequencies, HCT dissipates >>more<< power than LS, so beware...

Also note that 74HCT parts will consume *much* more current when driven 
with TTL levels (0.8/2.4 V) than with CMOS (rail-rail) levels. I'd have
to dig out the books to tell whether it's more than 74LS - I seem to
recall that in at least some cases it is.

Oh, for the good old days of 15V TTL! :-)

-- 
William Swan  {ihnp4,decvax,allegra,...}!uw-beaver!tikal!sigma!bill