At 07:57 PM 9/24/2003 +0100, you wrote:

>I highly doubt it - I've never come across a single RS232 port that
>doesn't work fine with 5V levels
>(many thousand products in the field).
>Has anyone ...?

No, and I suspect anyone introducing such a product would find that
there were products it "broke". 0/5V levels works fine (over short distances)
into anything I've ever seen, including the grandaddy of them all- the
bipolar MC1489 (which my friend Jim Thompson designed back when I were a
wee lad).

http://www.ee.washington.edu/stores/DataSheets/linear/mc1489.pdf

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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