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PICList Thread
'Surface Mount Crystals'
1998\11\12@130637 by Dave Johnson

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Can anyone recommend an inexpensive surface mount crystal to drive a
PIC16F84? I've been prowling the digikey catalog, but not only is there a
bewildering variety of crystals, but they seem a bit pricey to me.

On the other hand, is there any problem with using a ceramic oscillator
in a commercial product? The 0.5% accuracy is good enough for serial
communications, and it sure seems like they're a lot cheaper, plus of
course they don't require any external components. Are there aging issues?

Thanks for any advice/recommendations.

Dave Johnson

1998\11\12@182807 by NCS Products

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At 10:08 AM 11/12/98 -0800, Dave Johnson wrote:
>Can anyone recommend an inexpensive surface mount crystal to drive a
>PIC16F84? I've been prowling the digikey catalog, but not only is there a
>bewildering variety of crystals, but they seem a bit pricey to me.

"Inexpensive" and "Digikey" do not belong in the same sentance. :-)

However, finding surface mount components in small quantities for a
good price is very hard to do.

>On the other hand, is there any problem with using a ceramic oscillator
>in a commercial product? The 0.5% accuracy is good enough for serial
>communications, and it sure seems like they're a lot cheaper, plus of
>course they don't require any external components. Are there aging issues?

With built-in caps they don't require any external components.
But I'm not sure that they're much cheaper.

They work fine, however.

1998\11\13@054831 by wwl

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On Thu, 12 Nov 1998 10:08:06 -0800, you wrote:

>Can anyone recommend an inexpensive surface mount crystal to drive a
>PIC16F84? I've been prowling the digikey catalog, but not only is there a
>bewildering variety of crystals, but they seem a bit pricey to me.
>
>On the other hand, is there any problem with using a ceramic oscillator
>in a commercial product? The 0.5% accuracy is good enough for serial
>communications, and it sure seems like they're a lot cheaper, plus of
>course they don't require any external components. Are there aging issues?
If your app cal cope with the lower accuracy, ageing shouldn't be an
issue.

1998\11\13@115743 by andre

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On my latest board design I found that surface mount crystals take
more space then thru hole crystals.

Andre Abelian



Mike Harrison wrote:

{Quote hidden}

1998\11\19@124513 by wwl

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On Thu, 12 Nov 1998 10:08:06 -0800, you wrote:

>Can anyone recommend an inexpensive surface mount crystal to drive a
>PIC16F84? I've been prowling the digikey catalog, but not only is there a
>bewildering variety of crystals, but they seem a bit pricey to me.
>
>On the other hand, is there any problem with using a ceramic oscillator
>in a commercial product? The 0.5% accuracy is good enough for serial
>communications, and it sure seems like they're a lot cheaper, plus of
>course they don't require any external components. Are there aging issues?
If your app cal cope with the lower accuracy, ageing shouldn't be an
issue.

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