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From: rrw@naucse.cse.nau.edu (Robert Wier)
Newsgroups: sci.electronics
Subject: Dallas Semi Intelligent Sockets?
Message-ID: <3222@naucse.cse.nau.edu>
Date: 26 Jan 91 08:08:50 GMT
Organization: Northern Arizona University, Flagstaff AZ
Lines: 32


 A research group I'm involved with needs to put together a
 data logging system in a relatively short time.  We have a 
 number of single board computer systems which might fill the
 bill (one has 256K memory - sufficient for 80 days of readings
 or so), but it only has SRAM.  The research site is remote
 (out on the reservation, near Window Rock on the NM and AZ
 border), so we'd like to go out there and leave it to record
 data for at least a month unsupervised.  But we are concerned
 that dead batteries or other diasasters might cause us to lose
 ALL the data we've accumulated.  One possible solution is what
 Dallas Semiconductor calls Intelligent Sockets.  These are
 IC sockets which come with a lithium battery built in, which keep
 the memory chip powered up if the main vcc fails.  The stated
 life is between 5 - 10 years, depending on the chip selected.
 Alternately, they make actual memory chips with the battery
 built in (they call 'em non-voltile RAM).  

 I'd be interested in hearing from anyone who has knowledge about
 or has used these, price range, etc...

 Please either E-mail or post here.

 THANKS

 - Bob Wier

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                      College of Engineering
         Northern Arizona University / Flagstaff, Arizona
  Internet: rrw@naucse.cse.nau.edu | BITNET: WIER@NAUVAX | WB5KXH
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