Good suggestion, I'll investigate

Thanks

Padu

----- Original Message ----- 
From: "Mike Hord" <mike.hord@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Wednesday, November 16, 2005 6:37 AM
Subject: Re: [PIC] Capacitor for crystal


>> I'm designing a circuit using a PIC18F452 that is going
>> to communicate through USART at 115200bps. From
>>  the pic datasheet, I calculated that the ideal crystal
>> for my app is 14.7456MHz (or 7.3728MHz, but I'll stick
>> with the faster because I need the extra speed).
> 
> I'll take another tack, since you've had a number of
> excellent answers about this from other folks...
> 
> Have you considered a three-pin ceramic resonator?
> Accuracy is sub-crytal (~.5%), but much better than
> internal oscillator or RC network.  Plus, the three pin
> jobs have internal caps, so you just plug it in and go.
> They're also more rugged than crystals.
> 
> My favorite is 81-CSTCC3.68MG-TC from Mouser.
> Surface mount.  Run 3.68 into the PLL and you'll
> get 14.72- sound familiar?
> 
> Mike H.
> 
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