Re: Tying LSTTL inputs to Vcc?

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Article #2963

#2963

From: Rainer Malzbender
Date: Thu, 16 Apr 1992 15:43

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In article <dfs.703361967@ro> dfs@doe.carleton.ca (David F. Skoll) writes:
>I'm using some LSTTL parts in a circuit I'm building, and some inputs
>have to be tied to a constant logic "1".
>
>Why in most designs I've seen do people use
>either the resistor or spare gate method?

I always thought the reasoning had to do with current limiting in the event
of a catastrophic failure by the chip containing the pull-up. Without a
resistor you could short out the power supply, although that doesn't seem
to be such a big deal any more. Certainly for home hacking I never use
resistors.

-- 
Rainer Malzbender 
Post-doc, Physics
U. of Colorado, Boulder (303)492-1366              rainer@shelley.colorado.edu

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Path: arc1-ca.pugleaf.net!sparky!uunet!boulder!ucsu!spot.Colorado.EDU!rainer
From: rainer@spot.Colorado.EDU (Rainer Malzbender)
Subject: Re: Tying LSTTL inputs to Vcc?
Message-ID: <1992Apr16.154345.11907@ucsu.Colorado.EDU>
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Date: Thu, 16 Apr 1992 15:43:45 GMT
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