BRU from EPCOS AG. Find the PDF Datasheet, Specifications and Distributor Information. epcos r datasheet, cross reference, circuit and application notes in pdf format. R ,92 MHz. Abstract: R epcos r SM r SAW R SAW R sm r R EPCOS r saw S M R Text: Competitor P/N (MHz).

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Whatever you choose should use the same frequency, of course, and run on batteries. EPCOS is continuallysystem. To solder on the new one, place it onto the cleaned pads and flow solder underneath the pins from the side, for each pin individually. All was well until another key broke down — same procedure, different day. EPCOS is worldwide market leader in low-voltage power factor correction.

It features a standard circuit that very closely resembles my remote key, plus a detailed function explanation. EPCOS has design, manufacturing and marketingand manufacturing know-how and support in the early phases of their projects. Imagine unlocking your car, driving around some, and then being unable to lock it again.

The signal generated by the microcontroller is a digital pulse signal containing the remote code. EPCOS is continually improving its processescommitted to constantly reviewing and systematically improving its quality management system.

But g707 made me wonder if it could be fixed — so I cracked it open. Now, as the resonator…well…resonates at its designed frequency, excited by the impulse coming through the capacitor when the controller pin turns ON, the resonance waveform is coupled into the base of the transistor, which in turn amplifies it and pushes it dpcos onto the antenna.


EPCOS bietet eine umfangreiche. EPCOS has design, manufacturing and marketing facilities inknow-how and support in the early phases of spcos projects. Reproduction, publication and ecos of this data sheet, enclosures hereto and the information contained therein without EPCOS ‘ prior express consent is prohibited. Those resonators cost you a few cents at Farnell, but I would guess Digikey also has them. Your email address will not be published. While there are other manufacturers like RFM, these models seem to be a pretty common brand for such keys as far as I have seen.


The probability of finding a suitable transistor inside such a transmitting device is very high. EPCOS has design, manufacturing and marketing facilities in Europe, Asia and thesupport in the early phases of their projects. Previous 1 2 Do not heat the resonator for too long.

There is a lot more theory behind this, you can look it up in dedicated books about high frequency circuits and transmitter circuits. rr707

October 13, 2. I would guess that is pretty much the same for each car manufacturer, as eppcos the inner workings. What you get is a high frequency signal during each high-level time of the remote code signal and no signal during each low-level time. I still had one remote in spare though, and together with a bought new one the set was complete once again. Try Findchips PRO for epcos r B 0A95 B Text: EPCOS is continually improving its processes and thus theconstantly reviewing and systematically improving its quality management system.

I did it like this twice, but as said — pain! Owning a GHz scope greatly simplifies the task, of course.

If the range is much less, the transistor is most likely not up to the job. How it works, in easy words: It can be seen as an extreme example of amplitude modulation AMand the principle is identical to the way TV remotes r077 — only that RF is used instead of IR light.

Take care not to rip the copper traces off the pcb, as the glue keeping them rpcos becomes flexible when overheated. The resistor limits the output impedance of the controller pin to prevent it from clamping the transistor base to a fixed voltage and allow the resonator to overlay an AC component onto the DC voltage.

RF Components and Modules

Imagine repeatedly hitting a tuning fork with a small hammer and touching it to stop the vibration in a certain pattern while picking up the generated sound with a microphone to amplify it.


This site uses cookies: You will need to reassign the key to your vehicle according to the proper method designated by the manufacturer. Use hot air or reflow techniques if you can, or else heat the ground plane from the side, OR remove the resonator by applying a small amount of solder to the case top and heat it up completely. No abstract text available Text: Good thing that mechanical locks are not totally uncommon.

R EPCOS – Jotrin Electronics

This signal is fed into the resonator through a resistor and a capacitor, and from the resonator back through epcoos capacitor to the base of the output transistor. I had to try two different transistors, the first one was probably already dead before transplantation I already wondered why I never used that remote control.

Back to the repair — checking the original transistor with a standard multimeter showed proper diode behaviour meaning it was a bijunction npn or pnp transistorbut this is not always sufficient for a diagnosis of epcps working device in HF circuits. As I found out later, the resonator was perfectly working. They are a real pain in the ass to solder by hand! EPCOS is continually improving its processes and thus the quality of itsand systematically improving its quality management system.

I have noted the designation of the found replacement in the picture above. What you can measure, though, is the pulse signal from the controller. Inside the metallic-ceramic casing is a parallel LC resonance circuit which has been precisely trimmed for a specific resonant frequency. This picture was taken after the repair, which explains the flux residues.

The current types are mostly pin compatible to the old ones.

Use the datasheets to get the correct one for your frequency and pin layout.