Newsgroups: comp.robotics
From: pcats@cryton.demon.co.uk (Patrick Arnold)
Path: brunix!news.Brown.EDU!agate!howland.reston.ans.net!pipex!demon!cryton.demon.co.uk!pcats
Subject: Re: Flip-Flop.... 
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References: <CKMz3z.Mu6@ecf.toronto.edu>
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Date: Thu, 3 Feb 1994 18:26:37 +0000
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In article <CKMz3z.Mu6@ecf.toronto.edu> leebr@ecf.toronto.edu writes:

>hmmm... when I first read your reply, I remembered some things I
>looked over when I was designing some F/Fs.  I think this is really
>implementation dependent, and it probabably depends on which
>signal is asserted first, etc.  Anyway, a quote from TI's TTL Data Book:
>
>        * the output levels in this configuration are not
>        guaranteed to meet the minimum levels for VOH if
>        the lows at Preset and Clear are near VIL maximum...
>
>anyway, I suggest redesigning the circuit and forget using the
>F/F in some really weird way.

Yes, use a PLD of some sort (ie ICT PEEL18CV8), and you can make it do damn
near anything you want it to. The joys of semi-custom chips!

Patrick

-- 
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