Crystal identification.

Hi: I recently salvaged a 4 pin quartz crystal oscillator with this mark: FTF 446B. I have tried to search for a datasheet using this label with no luck, so I was wandering if this was some code that indicates the properties of the component or anything similar. Thanks in advance for the help

Is it from a personal mobile radio ?

From a Walkie Talkie

Then it could be 446 MHz ? I found that the code 446B stands for ±10 ppm accuracy, it might not be the frequency.

How could I make a circuit to check it? The confusing part is that it has 4 pins, instead of the usual 2

Atomillo: How could I make a circuit to check it? The confusing part is that it has 4 pins, instead of the usual 2

It could either be one of the 4-pin crystals where two pins aren't connected, or one an oscillator (ie, a crystal plus what's needed to generate a clock signal from that crystal). The best way to identify it is to examine the board it came off of and see which pins are connected to what. If two of the pins are grounded, you know it's just a crystal and the other two pins are the crystal pins. If it's got a pin connected to power rail, it's an oscillator.

Whatever it is, it's almost certainly a low cost part; I would not try too hard to identify/make use of it.

Atomillo: I recently salvaged a 4 pin quartz crystal oscillator with this mark: FTF 446B.

This:

I reckon is one of these: SAW-filter 446MHz

Yours, TonyWilk

P.S. You wouldn't have a 446MHz crystal in a 446MHz radio these days

Thanks! Thats exactly waht I needed.

TonyWilk: P.S. You wouldn't have a 446MHz crystal in a 446MHz radio these days

That explaines the cheesy feeling I got when I wrote that. A 446MHz crystal is not normal.

Koepel: That explaines the cheesy feeling I got when I wrote that. A 446MHz crystal is not normal.

lol. I nearly spat coffee all over my keyboard when I read that :D

Yours, TonyWilk