Re: Reliability: 54 vs. 74 TTL

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Article #19259

#19259

From: Henry Spencer
Date: Mon, 13 Jun 1988 19:01

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> ... If the ambient is say 69 degrees C, is a
> 54XX logic IC more reliable because it has been "derated from 
> 125 degrees C" that a Commercial one that is only rated to go
> from  0 to 70 degrees C?  Let's assume both are in a frit seal
> ceramic package so we are not confused with comparisons between
> plastic and hermetic package reliability...

My impression is that the difference between 54XX and 74XX *is* the
packaging, period.  I could be wrong.

JANTX parts are a different story, of course.
-- 
"For perfect safety... sit on a fence|  Henry Spencer @ U of Toronto Zoology
and watch the birds." --Wilbur Wright| {ihnp4,decvax,uunet!mnetor}!utzoo!henry

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Message-ID: <1988Jun13.190154.854@utzoo.uucp>

Path: arc1-ca.pugleaf.net!utzoo!henry

References: <5770009@hpscdc.HP.COM>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Reliability:  54 vs. 74 TTL
Message-ID: <1988Jun13.190154.854@utzoo.uucp>
Organization: U of Toronto Zoology
References: <5770009@hpscdc.HP.COM>
Date: Mon, 13 Jun 88 19:01:54 GMT

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