Regarding the 4049/4050 option, you state that the Vdd must be 5V on
this chip.
Does this mean that this chip can only be used when converting 5V CMOS
to the PIC?
Or can I have a 12-15V CMOS output interface to a 5V 4049/4050 input and
the output of the 4049/4050 will
provide proper level shifting for the PIC.

As I suggested earlier, "A 4049/4050 (Vdd=5V) will convert from the 4000
CMOS to PIC. (inverting / non-inverting hex buffer)" This works fast,
does 6 lines with a single part and uses almost zero power.

Thanks
Dan

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