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https://lcsc.com/product-detail/Ceramic-Resonators_ABRACON_AWSCR-16-00CV-T_16MHz-0-5-22pF_C179647.html

I have been developing a project that includes ATmega328p-AU, So I have studied many circuits that use a 16 MHz crystal with 22 pF capacitors. So I thought why not use a ceramic resonator to save some space. So I want to know whether it would be better to use a ceramic resonator with the internal capacitance of 22 pF or crystal with external capacitors as given in the schematic?

ATmega328p schematic with 16 MHz external crystal

I have provided the link to the ceramic resonator that I am referring to.

Thank you.

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    \$\begingroup\$ please define the meaning of the word better as it applies to your project \$\endgroup\$
    – jsotola
    Commented Jul 4, 2020 at 4:02
  • \$\begingroup\$ A resonator or a crystal which one is better to use with ATmega328p-AU \$\endgroup\$
    – Ravikiran
    Commented Jul 4, 2020 at 4:14
  • \$\begingroup\$ @Ravikiran please try to understand that you are not telling us what your application does with the clock, so we can't tell if you can use a resonator for that or not. The AVR itself can use a ceramic resonator or a crystal. Resonators start up faster and have less precision compared to crystals. \$\endgroup\$
    – Justme
    Commented Jul 4, 2020 at 7:29

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A crystal is more accurate.

A ceramic resonator is more robust, smaller, and may be cheaper.

But which one is 'better'? Depends on what is more important for your application. Use a crystal if you need more accurate timing, eg. for a real-time clock, frequency counter etc. If accuracy isn't important then the ceramic resonator could be better because it is smaller.

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