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Topic: is this crystal suitable? (Read 577 times) previous topic - next topic

jonisonvespaa

hi
for my first project, im learning to pcb design, and im laying my own board out, using surface mount components not knowing anything about crytals just wondering if this crystal is suitable to use with a ATMEGA328-20PU chip.

http://www.rapidonline.com/Electronic-Components/Act753smx-4-Smd-16-00mhz-90-2014

thank you

MarkT

16MHz, 20pF load capacitance - yes that should be fine, use the standard two 18pF capacitors with it.
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jonisonvespaa

#2
Apr 28, 2012, 12:48 am Last Edit: Apr 28, 2012, 12:51 am by jonisonvespa Reason: 1
hi mark
thanks for the help i thought they were 22pf? hasnt got a value on the circuit diagram
cheers

dc42

The capacitor value is not critical, unless you are looking for a very accurate clock frequency. 18pF or 22pF will do. If you don't need such a precise clock frequency, then a 3-terminal ceramic resonator costs less than a crystal and has the capacitors built in.
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jonisonvespaa


Leon Heller

The capacitors are effectively in series so something like 33 pF would be more suitable, allowing for stray capacitance.
Leon Heller
G1HSM

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