>>
>I have another question regarding low voltage design.  I want to design a
>battery operated circuit (3.3V) with a PIC controller.  My question is
>how do you do the development?  You would obviously want to use a JW
>(windowed) device, but as far as I could gather, the JW devices are only
>rated for 5V (min 4.5V) usage.  I can run the circuit at 5V while
>developing, but since it contains some analog components I cannot be 100%
>sure that it will work at 3.3V as well.  Any suggestions?


I've run -C- parts and -JW parts down to well below 2.5V - never had a
problem. It's probably not recommended for production, but if you test each
JW part to find it's lowest operating voltage and stick to something above
that you should be OK. Presumably Microchip test like they do for speed, in
which case there's no manufacturing difference between voltages, only the
way they're tested.

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