At 05:36 PM 8/5/01 -0300, you wrote:
>
>And a so called "good engineering practice" should be mantainig below these
>specs.

Not just below, but WELL below. The definition of "well" depending on the
nature
of the stress and failure modes. For example, latchup tendency increases
greatly with junction temperature.

Using the protection diodes can be a useful technique, but take care, there
have
been cases of oddball problems such as current leaking into analog inputs
on the same port (but I'm not sure that was on PICs).

Best regards,

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Spehro Pefhany --"it's the network..."            "The Journey is the reward"
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