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Message

RE: [AVR-Chat] Crystal Oscillators

2004-01-13 by Kathy Quinlan

> -----Original Message-----
> From: Andromeda_at_Mindspring.com [mailto:andromeda@mindspring.com] 
> Sent: Tuesday, 13 January 2004 1:01 PM
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Crystal Oscillators
> 
> 
> Hello,
>     Are crystal oscillators as simple to use as crystals with 
> loading caps?  I am having a devil of a time matching 
> crystals with the right loading capacitors, and I thought 
> switching to crystal oscillators might make this part of my 
> life easier.
>  
> I ordered crystals from Digi-Key that say 20pf load, and when 
> I hooked one up with a 20pf load on each pin, it simply didn't work.
>  
> Do you think crystal oscillators might solve this problem?
>  

The 20pF specified is the total capacitance including stray capacatance.

So I would start of with a 39pF (I use 33pF as I got a good deal on
1000) in each leg of the crystal :o)

Hope this helps


Regards,

Kat.

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