4-lead ceramic resonator ?

[mario]

Hello,


I ordered a 6 MHz ceramic resonator, and I got a thing with 4 leads?! I
would have known what to do with 2 or 3 leads ceramic resonators, but 4 !??


Does anyone have a clue what are these leads? They are 4 in a row, similar
to the 3-lead resonators, but with 2 and 2 leads a bit more apart.


thanks again for your help



mario

 

[Michael A. Terrell]

Hello,

I ordered a 6 MHz ceramic resonator, and I got a thing with 4 leads?! I
would have known what to do with 2 or 3 leads ceramic resonators, but 4 !??

Does anyone have a clue what are these leads? They are 4 in a row, similar
to the 3-lead resonators, but with 2 and 2 leads a bit more apart.

thanks again for your help

mario

Have you asked the vendor for a data sheet? Does it have the brand
name and part number?


--
We now return you to our normally scheduled programming.

Take a look at this little cutie! ;-)
http://home.earthlink.net/~mike.terrell/photos.html

Michael A. Terrell
Central Florida

 

[mario]

Ummm... apparently it's a "frequency band filter" (translated from finnish)
and I can't see the product code now, as I don't have a microscope handy,
but as soon as I get home, I will read it from the part.

However, since it's apparent that I have a ceramic band-pass filter, my
question becomes: how can I use that as a resonator?

 

[Lewin A.R.W. Edwards]

I ordered a 6 MHz ceramic resonator, and I got a thing with 4 leads?! I

would have known what to do with 2 or 3 leads ceramic resonators, but 4 !??

My guess would be that two leads go to the resonator and two to
internal caps, i.e. you have a cap between pins 1-2, another cap
between pins 3-4, and the resonator is connected between pins 2-3, so
you can use your own external caps if desired (by leaving 1 and 4 NC).

But you need a datasheet

 

[mario]

!??

My guess would be that two leads go to the resonator and two to
internal caps, i.e. you have a cap between pins 1-2, another cap
between pins 3-4, and the resonator is connected between pins 2-3, so
you can use your own external caps if desired (by leaving 1 and 4 NC).

I had almost exactly the same guess, except that I thought the resonator was
between 1 and 4. This is a deduction from the 3-lead ceramic resonators,
where the middle lead is usually tied to ground, as there are grounding
capacitors between leads 1&2 and 2&3, while the resonator is between the two
extreme leads 1&3. So, I thought that in an analog way, the resonator in my
case should be between 1 and 4.

But, I wasn't able to make it work as an oscillator, due, probably, to a
busted Cypress USB controller. I'll try with other permutations of the pins,
though.

But you need a datasheet

Hey, I don't have one, sorry ))) but I could see with my microscope, a
logo: a big "C" with a capital "M" inside it. Does that ring a bell to you?

p.s. I think there's a website with electronics manufacturer logos. Do you
know which one it is?

 

[Dave Cole]

p.s. I think there's a website with electronics manufacturer logos. Do you
know which one it is?

Mario:
Don't know if it's the one you saw, but one site is
http://www.eyesurf.co.uk/~nutteing/logotext.htm

HTH
Good luck!
Dave Cole
--
How do you tell a communist? Well,
it's someone who reads Marx and Lenin.
And how do you tell an anti-Communist?
It's someone who understands Marx and Lenin.
Ronald Reagan

 

[mario]

Hey Dave,

thanks for the link. No, it' wasn't this, but it's good to have anyway.

cheers


mario

 

[Graham W]

... but I could see with my
microscope, a logo: a big "C" with a capital "M" inside it. Does that
ring a bell to you?

I have a feeling that is the MuRata logo.

 

[mario]

You are right, it's a Murata logo. I just checked one of their online
datasheets, and indeed, the logo they use on their components is the one I
described.

Thanks!


mario