On the subject of RS-232 converter chips... I have had problems running
MAX3232's at 3.6V. Sometimes they work, sometimes they don't. Sometimes they
get freaky hot. The general symptom seems to be no -6V output.
I've never had problems running MAX232A's at 3.6V, even though they are not
spec'd for it. Also, pay close attention to the recommended cap values, then
maybe ignore them. I wind up using 0.47 uF caps everywhere (having over 20,000
of the little buggers handy).
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