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From: Drew.Anderson@CMU-CS-C.ARPA (Drew Anderson)
Newsgroups: net.micro
Subject: RS-232
Message-ID: <157@brl-tgr.ARPA>
Date: Wed, 24-Jul-85 22:01:47 EDT
Article-I.D.: brl-tgr.157
Posted: Wed Jul 24 22:01:47 1985
Date-Received: Fri, 26-Jul-85 01:18:47 EDT
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One side comment is that the ranges for RS-232 are actually 3-25.  I have 
only seen a very few occasions where the voltage ever went above ~14 (or
below -14) but they do exist.  I only mention this in case some one tries
to use an opamp with +-15V supplies and no clamping diodes.  Some people
may consider +-15 a max/min since that is what the 1488 driver chips are
rated at.
				Drew Anderson
				DDA@cmu-cs-c.arpa
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