At 04:18 PM 4/10/2010, William \"Chops\" Westfield wrote:

>What limits the input voltage to 30V?  Just the max voltage of the 393 ?

Yep.  Actually, the '393 is rated to 35V, I spec 32V as max just for 
my usual 10% safety margin.

I suspect that some '393s will go past 40V but not in any product 
that I would ship to a customer.

The max voltage limit is both the max Vcc on the chip as well as the 
max allowable voltage on the output pin of the 2nd comparitor.

dwayne

-- 
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

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