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Crystal external component selection

Gergo

Jul 23, 2017
13
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Jul 23, 2017
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How do I know what external components I need for a crystal and what values they have? In my case, I need crystals for my microcontroller. Lets say I choose this, here's what the datasheet says:download (1).png
 

BobK

Jan 5, 2010
7,682
Joined
Jan 5, 2010
Messages
7,682
You typically need two capacitors, one from each pin to ground. They should, in series, equal the recommended series capacitance, in this case, 18 pf. Thus, 36 pf caps are called for. Because there will be some stray capacitance, so use 33pf, which is a stadard value.

Bob
 
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