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- Path: sparky!uunet!noc.near.net!newshost.williams.edu!93gke
- From: 93gke@williams.edu (oldwanda)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: What's the deal? My chip says "SX-25"; Norton says "SX-33"
- Date: 5 Jan 1993 16:54:50 GMT
- Organization: Williams College, Williamstown, MA
- Lines: 18
- Message-ID: <1icegqINN7vl@savoy.cc.williams.edu>
- References: <1ht90eINNei0@hpscit.sc.hp.com> <C0Cos2.2Fw@usenet.ucs.indiana.edu> <1993Jan5.152504.9786@bmers95.bnr.ca>
- NNTP-Posting-Host: bigbird.cc.williams.edu
-
- In article <1993Jan5.152504.9786@bmers95.bnr.ca> khor@bnr.ca writes:
- >For example lets take a simple switching speed from low to high. If
- >it takes 35ns to switch (low and high voltage levels reference points
- >differs in low->high and high->low), then it will fall into the 25MHz
- >grade. But if the switching takes only 28MHz then it will fall into
- >the 33MHz grade.
-
- >In the actual case, the testing is a lot more complex and there are
- >hundreds of electrical tests before the chips a graded.
-
- If this is true, then how can vendors push the 25Mhz chips to 33Mhz?
- Wouldn't they fail at the higher speeds since they were slow in
- testing?
-
- 93gke@cs.williams.edu
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