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From: kilian@cray.com (Alan Kilian)
Newsgroups: sci.electronics
Subject: Re: schmitt trig. nand configurations
Message-ID: <153933.28651@timbuk.cray.com>
Date: 2 Dec 90 21:46:49 GMT
References: <48711@eerie.acsu.Buffalo.EDU>
Lines: 25

In article <48711@eerie.acsu.Buffalo.EDU>, blw@acsu.buffalo.edu (brian l wybaillie) writes:
> i have a circuit which uses a 74xx13 schmitt triggered dual 4 input
> nand in the following configurations;
> 

              Edited..

>                                                       the top one has all
> it's inputs tied to one which produces an inverted output.  the bottom one
> is only dependant upon one of it's inputs since the other 3 are tied to Vcc.
> thus since it is a nand gate it will have the same outcome as the
> as the first circuit, (an inverter).
> 	is there any special reason for configuring it in the two different
> ways, i.e. faster responce, or sinking more current?
> 				brian wybaillie

    The logic producing the input for the first nand will have to drive 4 loads
and the second one will only have to drive one load.

   I like the second one better.

-Alan Kilian
 Cray Research, Inc.
 655 F lone Oak Drive
 Eagan, MN 55121               kilian@cray.com


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