Article View: sci.electronics
Article #18406Re: TTL (and other) families
From: William Swan
Date: Fri, 15 Jan 1988 22:30
Date: Fri, 15 Jan 1988 22:30
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977 bytes
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
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Path: arc1-ca.pugleaf.net!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