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PICList Thread
'Oscillators'
1998\08\05@211054 by ronruss

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The 16C63/66 I use works fine with an 8Mhz ceramic
resonator but doesn't with a 16Mhz ceramic resonator.
I've tried the 16Mhz with both XT and HS option.
The ceramic resonators are the ones with the built
in capacitors, Digikey part # x905-nd and x908-nd.

The traces are very short. Will the PIC work at 16Mhz
with a ceramic or does it need a crystal? Or do I need
a 1mohm resistor across the resonator? Or ????

Thanks...

--

From:   Ron Russ
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1998\08\05@214149 by William Chops Westfield

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Does anybody have a good source for "small" quantities (10<n<100) of ceramic
oscillators (with built-in caps)?  All my usual "surplus-ish" haunts seem to
only have crystals, resulting in a paradoxical situation where a crystal
solution is cheaper (assuming I've got caps lying around), but I'd prefer
the smaller component count.

Thanks
Bill W

1998\08\06@035139 by Stefan Sczekalla-Waldschmidt

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William Chops Westfield schrieb:
>
> Does anybody have a good source for "small" quantities (10<n<100) of ceramic
> oscillators (with built-in caps)?

try FARNELL.

Kind regards

       Stefan Sczekalla-Waldschmidt
       spam_OUTsswTakeThisOuTspamoikossw.de

1998\08\06@120454 by Andy Kunz

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I recently got a few sample Murata parts from my local FAI rep up to 18.432
MHz.


At 06:29 PM 8/5/98 PDT, you wrote:
>Does anybody have a good source for "small" quantities (10<n<100) of ceramic
>oscillators (with built-in caps)?  All my usual "surplus-ish" haunts seem to
>only have crystals, resulting in a paradoxical situation where a crystal
>solution is cheaper (assuming I've got caps lying around), but I'd prefer
>the smaller component count.
>
>Thanks
>Bill W
>
>
==================================================================
Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
==================================================================

1998\08\06@130441 by Leon Heller

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In message <.....CMM.0.90.4.902366966.billwKILLspamspam@spam@flipper.cisco.com>, William Chops
Westfield <billwspamKILLspamCISCO.COM> writes
>Does anybody have a good source for "small" quantities (10<n<100) of ceramic
>oscillators (with built-in caps)?  All my usual "surplus-ish" haunts seem to
>only have crystals, resulting in a paradoxical situation where a crystal
>solution is cheaper (assuming I've got caps lying around), but I'd prefer
>the smaller component count.

Farnell has them: http://www.farnell.com

Leon
--
Leon Heller: .....leonKILLspamspam.....lfheller.demon.co.uk http://www.lfheller.demon.co.uk
Amateur Radio Callsign G1HSM    Tel: +44 (0) 118 947 1424
See http://www.lfheller.demon.co.uk/dds.htm for details of a simple AD9850
DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.

1998\08\06@132129 by Harold Hallikainen

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       I also had trouble with the 16 MHz resonators (with internal
capacitors) from Digikey (as I recall, they are made by ECS).  Also, the
ones from Integrity Technology did not work reliably.   In telephone
conversations with these companies, they stated that if the resonator
worked in their suggested circuit (using a cmos inverter), the resonator
was fine.  I then talked with muRata.  They actually test their
resonators with various microcontrollers.  At the time I called (about
two years ago), they were still testing with the Microchip parts.  I went
ahead and tried their resonator (again with internal capacitors) and they
work fine.  We've probably shipped over 1,000 units using the muRata
resonator at 16c74A and several hunderd 80c31's.  They have all worked
well (and we run these in a high temperature environment, up to 75C.
It's really nice using these parts because they are so small, cheap, and
do not require external capacitors.


Harold


Harold Hallikainen
EraseMEharoldspam_OUTspamTakeThisOuThallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm

On Wed, 5 Aug 1998 21:05:59 -0400 Ron Russ <ronrussspamspam_OUTemicros.com> writes:
{Quote hidden}

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