PIC XT oscillator question.

[Rickertsen2]

Originally Posted by KenWittlief

you said oscillators but do you really mean crystals?

dont worry about that third harmonic stuff - just get a 40Mhz crystal and connect it with the correct caps on each side, and it will work fine.

Crystals are standard - they have been for years - you do have to worry about what harmonic its oscillating at, they mark and spec them according to the resulting frequency. If you want a 40Mhz clock you get a 40Mhz crystal.

Have you checked DigiKey?

Yesi did mean resonators. Are you absolutely sure that they will oscillate on their third harmonic automatically. This is against everything i have read and common sense, which dicates that they would run at 13.333 Mhz in a normal configuration rather that their third harmonic of 40Mhz.