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'[PIC]: Digi-Key Ceramic Resonators'
2002\06\27@142236 by Alan Shinn

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Pardon me if this is a re-send.

Digi-Key sells a ZTT series 4 mHz ceramic resonator (through hole) with
built in caps for $0.68 ($.45 in 100s).
Does anyone have experience with these? Do they seem to work as well
with (say) PIC16F84A or 16F628 as the much acclaimed (and characterized
for PIC) Murata devices.
The reason I ask is that I don't know where to get the Murata parts nor
what to order, Digi-Key is easy.

They also have a surface mount  ECS-SRA-B series. Same question??
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2002\06\27@143925 by Eisermann, Phil [Ridg/CO]

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Mouser carries murata, so does Pioneer (i think).

I've had one experience with ECS. It was a SMD crystal (ECS-SR1-4.00-B) on a
PIC711 and PIC715. It failed to work at temperatures higher than 30C (thats
around 86F). They confirmed that it would not work, unless i purchased one
without caps, and added caps myself. Sort of defeats the purpose of built-in
caps. I replaced it with a murata part. That one worked up to at least 120C.
My wire insulation was starting to soften at that point, so we did not go
any higher

Both resonators workd down to at least -60C. it might have been the
resonator or the PIC that stopped working at that point.


Phil Eisermann
Electronics Engineer
The Ridge Tool Company
(440)329-4680


> {Original Message removed}

2002\06\27@161425 by John Hansen

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They work great.  I use them all the time.   Mouser also has them for a
slightly lower price, but not enough to warrant placing an order with two
different companies.

John Hansen

At 11:23 AM 6/27/02 -0800, you wrote:
{Quote hidden}

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2002\06\27@221459 by Peter Anderson

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I have been using and selling these for some five
years.  Thousands, with no problems.

I have however had problems with the 20 MHz units and
encourage a crystal at frequencies above 4.0 MHz.

Peter H Anderson, http://www.phanderson.com

--- Alan Shinn <spam_OUTalshinnTakeThisOuTspamMINDSPRING.COM> wrote:
> Pardon me if this is a re-send.
>
> Digi-Key sells a ZTT series 4 mHz ceramic resonator
> (through hole) with
> built in caps for $0.68 ($.45 in 100s).
> Does anyone have experience with these? Do they seem
> to work as well


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2002\06\28@011435 by Daniel Rubin

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I have had absolutely no problem using the 20MHz ZTT ceramic resonator
(with built in caps) and a PIC16F877.  I use the chip's hardware serial
module so there is timing involved and everything works like a charm.

- Dan


At 07:12 PM 6/27/02 -0700, you wrote:
{Quote hidden}

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2002\06\28@122350 by Harold M Hallikainen

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       In my experience, pretty much any of the commonly available 3 pin
ceramic resonators work at 4 and 10 MHz. I'm now using the ZTT series
from Digikey on 18C452 and 18F452 with the clock multiplier. Works fine.
At 16 MHz, however, I found anything but murata to be unreliable.
       In one product where we went surface mount, the surface mount 4 MHz
resonator with caps from Digikey was unreliable with a 16f628. We surface
mounted leaded devices until we got the board characterized by murata.

Harold



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2002\06\28@122402 by Harold M Hallikainen

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       Back when I was having trouble with ECS through hole resonators with
built in caps, I called them to see what could be done. They said that as
long as the part worked in their sample circuit (a cmos inverter
oscillator circuit), the part was fine and the problem was on my end (ie,
the PIC and my two very short traces). We then designed in the murata.
This, again, was at 16 MHz on a 16c74. ECS seems fine at 4 and 10 MHz,
just not 16 on a PIC.

Harold


On Thu, 27 Jun 2002 14:39:07 -0400 "Eisermann, Phil [Ridg/CO]"
<peisermaspamKILLspamRIDGID.COM> writes:
{Quote hidden}

> > {Original Message removed}

2002\06\28@143844 by Eisermann, Phil [Ridg/CO]

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face
Originally I wrote:

> I've had one experience with ECS. It was a SMD crystal
> (ECS-SR1-4.00-B) on a PIC711 and PIC715. It failed
> to work at temperatures higher than 30C (thats
> around 86F).


Harold followed up with:
>         In one product where we went surface mount, the
> surface mount 4 MHz resonator with caps from Digikey
> was unreliable with a 16f628. We surface mounted
> leaded devices until we got the board characterized by
> murata.

Where these SMD crystals from ECS? That would be
useful information. Two people experiencing problems
with 4 MHz SMD crystals from ECS.


Phil Eisermann
Electronics Engineer
The Ridge Tool Company
(440)329-4680

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2002\06\28@161648 by Harold M Hallikainen

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On Fri, 28 Jun 2002 14:38:01 -0400 "Eisermann, Phil [Ridg/CO]"
<.....peisermaKILLspamspam.....RIDGID.COM> writes:
> Where these SMD crystals from ECS? That would be
> useful information. Two people experiencing problems
> with 4 MHz SMD crystals from ECS.
>

       They were ceramic resonators (SMT) from Panasonic, I think.

Harold



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