On Wed, 14 Jan 2004 12:45:04 -0800, you wrote:

>This is mostly unrelated to the previous posts on this thread, but the
>question occured to me as I was reading them...
>
>P-channel vs. N-channel FETS: given the ability of PIC output ports to =
drive
>either a high or low logic level, to apply to the FET's gate, are there =
any
>design considerations that should dictate choosing one over the other
>(that's P vs N- channel)?  I'm thinking primarily w.r.t. power-up
>conditions, polarities, etc.

N-channel are generally 'better' FETs, i.e. lower on-resistance for a =
given size/price.
Also, using N-ch FETs to do low-side switching eliminates any =
level-shifting issues vs. high-side
switching of anything other then the same supply rail as the PIC

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