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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!ihnp4!mgnetp!ltuxa!ttrdc!levy
From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: net.arch,net.micro.68k
Subject: Re: Asynchronous State machines
Message-ID: <601@ttrdc.UUCP>
Date: Sat, 23-Nov-85 18:03:09 EST
Article-I.D.: ttrdc.601
Posted: Sat Nov 23 18:03:09 1985
Date-Received: Mon, 25-Nov-85 06:43:29 EST
References: <389@aum.UUCP> <6077@utzoo.UUCP> <395@aum.UUCP> <6111@utzoo.UUCP> <6144@utzoo.UUCP>
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 26
Xref: watmath net.arch:2156 net.micro.68k:1363

In article <6144@utzoo.UUCP>, henry@utzoo.UUCP (Henry Spencer) writes:
>
>I don't remember the time needed for STTL, since in my opinion nobody in
>his right mind uses STTL now that FTTL is available.  FTTL does indeed
>settle faster.  Note the relationship between settling time and synchronizer
>performance is *not* linear.  FTTL is not just better, it is lots better.
>--
>				Henry Spencer @ U of Toronto Zoology
>				{allegra,ihnp4,linus,decvax}!utzoo!henry

Note:

Lots of people in their right mind use _L_STTL instead of FTTL whenever
it will work.  Reason?  FCC emission regulations.  FTTL is N-O-I-S-Y.
It is a pain in the *ss if you design in ANYTHING which has a switching
speed any higher than required if you are FCC conscious and you don't have
everything sealed up inside a metal shield.  My apologies of course (to
head off "you missed the point, jerk" flames) if we are merely talking
in the arena of experimental equipment, not production equipment.
-- 
 -------------------------------    Disclaimer:  The views contained herein are
|       dan levy | yvel nad      |  my own and are not at all those of my em-
|         an engihacker @        |  ployer or the administrator of any computer
| at&t computer systems division |  upon which I may hack.
|        skokie, illinois        |
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