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Article #976

Re: How does the Dallas Semiconductor chip retain the time?

#976
From: maniac
Date: Fri, 31 May 1991 20:53
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> Not having any specs on my chip (I got it from Steve Liggett), I was
> wondering..
> 
> I figure it either has a very small lithium-type battery someplace
> (in which case I wonder about its lifetime), or a small nuclear
> reactor of the Pons & Fleischman (or Fleischman/Pons, for our english
> readers) type.  If it's the latter, how often do I need to sprinkle
> it with heavy water?
> 
> I suppose it might also be a sliver of plutonium and a miniature
> thermocouple, but that's REALLY farfetched!
 
Actually, it's a combination of the two.  It does need a drop of water
every hundred thousand years, and it has a thermocouple around a mini
plasma fusion generator, underneath a bunch of insulation, which just
BARELY fits in the case/socket.

(Actually it is a small lithium battery, life is rated at 10+ years.  The
reason I know all this, is a) I have one in my pc532.  b) my company makes
them [Dallas Semiconductor is an interesting place, and vector is just a
name for the network impared 8-(] and c) I just spent a LONG time trying
to get one to work with a serial ported sram controller chip (DS1280))

> :-) :-) :-) for the sarcasm impaired.

(smilies, SMILIES, we don' need no stinkin' smilies!...)

-- 
Jon Buller       jonb@vector.dallas.tx.us       ..!texsun!vector!jonb
FROM Fortune IMPORT Quote;             FROM Lawyers IMPORT Disclaimer;
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From: maniac@vector.dallas.tx.us
Newsgroups: comp.sys.nsc.32k
Subject: Re: How does the Dallas Semiconductor chip retain the time?
Message-ID: <m0jjGTR-0001mGC@vector.dallas.tx.us>
Date: 31 May 91 20:53:17 GMT
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