Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site wdl1.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!ihnp4!qantel!hplabs!hpda!fortune!wdl1!jbn
From: jbn@wdl1.UUCP
Newsgroups: net.micro
Subject: EPROM memory lifetime query
Message-ID: <587@wdl1.UUCP>
Date: Mon, 5-Aug-85 01:31:43 EDT
Article-I.D.: wdl1.587
Posted: Mon Aug  5 01:31:43 1985
Date-Received: Tue, 6-Aug-85 12:23:41 EDT
Sender: notes@wdl1.UUCP
Organization: Ford Aerospace, Western Development Laboratories
Lines: 15
Nf-ID: #N:wdl1:1400060:000:571
Nf-From: wdl1!jbn    Aug  1 13:09:00 1985


      How long do current EPROMS and EEPROMS hold their memory?  The data
sheets don't say.  Is it temperature dependent?  Humidity dependent?
Five years?  Ten years?  Twenty years?  Are some kinds better than others?
Which ones?  Is lifetime testable?  These things have a finite lifetime;
they're just capacitors.  All those bits out there are slowly leaking away.
How long will they last?

      I'd like to hear from some semiconductor industry people who know what
they are talking about.

				John Nagle
				Ford Aerospace and Communications Corp.
				415-852-4126