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From: ftpam1@acad3.alaska.edu (MUNTS PHILLIP A)
Newsgroups: sci.electronics
Subject: Re: The 555
Message-ID: <1991Jan14.055718.18614@ims.alaska.edu>
Date: 14 Jan 91 05:57:18 GMT
References: <10014@as0c.sei.cmu.edu> <1991Jan13.044249.1640@rodan.acs.syr.edu>
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In article <1991Jan13.044249.1640@rodan.acs.syr.edu>, amichiel@rodan.acs.syr.edu (Allen J Michielsen) writes...
>In article <10014@as0c.sei.cmu.edu> rsd@sei.cmu.edu (Richard S D'Ippolito)
>>years back!) that there is a fundamental design flaw with the 555 timer
>>chip, in that there are certain operating conditions and external part
>>values which could cause part of the chip circuitry to latch up (like a
>>
>>Rich
>   I have used the 555 in many a circuit, and will testify that it is a very
>good chip.  It may still have a tendancy to lock up at the ends of the design
>limit, but usually the chip specs from like ti are quite reasonable and
>reliable.

     I have noticed in the past that some makes or perhaps lots absolutely
need bypass capacitors on pin 8 and pin 4.

Philip Munts N7AHL
NRA Extremist, etc.
University of Alaska, Fairbanks