solarwind escreveu:
> I ordered some 3 V chips yesterday - the PIC32MX440F512 as well as
> some dsPIC33 3.0 - 3.6 V chips.
>
> 1. I have a pickit2 and will be using it to power and program the
> target. Question: will the pickit2 work with these 3.3 V chips or will
> it zap them 5 V?
>
> 2. I'll be using a MAX233A to interface the PICs with a PC via UART.
>   =


Didn't you mean MAX232?

> It converts RS232 levels to 5V levels. How do I make the 5V levels
> into 3 V levels so I don't fry my PICs?

Use the MAX3232, it is a 3.3V part.
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