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Choosing Resonator for AtMega328P design? Answered

The ATMega328P datasheet specifies a load capacitance for a resonator from 12-22pF but the only 2 Resonators that will fit in my design (from Digikey) have 10pF and 33pF internal capacitors. Which one should I use, the 10pF or the 33pF, and what are the tradeoffs?

Here is the atmega328p datesheet



2 years ago

AFAIK the capacitor should match whatever the datasheet of the resonator states.
The atmega datasheet is for the reference design and I doubt you will have any negative effects by matching the capacitor to the crystal instad of matching it to Atmel specs.