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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.micro
Subject: Re: 74S124 as xtal osc - (nf)
Message-ID: <4056@utzoo.UUCP>
Date: Tue, 10-Jul-84 16:21:09 EDT
Article-I.D.: utzoo.4056
Posted: Tue Jul 10 16:21:09 1984
Date-Received: Tue, 10-Jul-84 16:21:09 EDT
References: <3754@fortune.UUCP>
Organization: U of Toronto Zoology
Lines: 21

Various people replied to my problems with the 74S124; a few extracts
will sum up the substance of the replies:

   "yeah, you found one of TI's embarassing mistakes..."

   "I have tried using the S124 as a VCO, with very poor success...
   the chip wasn't very accurate, and it had a tendency to oscillate
   based on the parasitics."

   "You found the right solution, abandon the part!"

   "Don't use a 74S124 for ANYTHING, if you can avoid it. It EATS power,
   puts spikes in the power supply, experiences lots of "pulling" from other
   noise in the system, etc. Even TI agrees."

Several people observed that the LS624 and friends are TI's preferred
alternative to the [L]S124 these days, and that the 624 works quite
well and is readily available.  I may try one.
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,linus,decvax}!utzoo!henry