Crystal 20MHz

Standard frequency crystals - use these crystals to provide a clock input to your microprocessor. Rated at 20pF capacitance and +/- 50ppm stability. Low profile HC49/US Package.

Crystal 20MHz Product Help and Resources

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

3 Electrical Prototyping

Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • mbushroe / about 14 years ago / 1

    The Atmel recommends 12-22pF capacitors for their ATMega and ATtiny microcontrollers. So 22pF sounds like a good number.

    • WizenedEE / about 13 years ago / 1

      I believe that the microcontroller is irrelevant capacitance value, each crystal has their own capacitor values that it needs.

  • TimW / about 14 years ago / 1

    I've been trying to find information on what capacitors to use with this crystal without much luck. Best I could come up with is 22pF for both caps. If anyone has any suggestions on where to find cap information I'd love to hear it. If not, I'll report back with some tests after I receive the part.

  • CalcProgrammer1 / about 15 years ago / 1

    Works great with ATMega328P. I am not using any capacitors, just stuck the crystal across the XTAL pins and the chip responds just fine and timing seems to be accurate. The only problem is that most example code seems to be based around the (more common) 16MHz frequency and you may have to recalculate some numbers. The datasheet has 20MHz listed for calculating serial baud rates so that part shouldn't be hard.

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