Crystal Oscillator Question

A crystal is a different thing to a crystal oscillator.

A crystal has only two pins that are interchangeable.

You have an oscillator module. It has a crystal and circuitry.

Attach +5V to Vdd, 0V to GND, connect Output to OSCIN.

Make sure you select the right oscillator mode (probably external high speed) when programming the PIC.

HTH

cheers, Rich.

That's because what you have is a canned oscillator and not a crystal. Feed it +5 & ground, get a (more or less) square wave at the output.

Often, a microcontroller can use an oscillator (or other clock source) instead of a crystal if the clock is fed to the xTAL1 (or equivalent) pin. Sometimes it's also necessary or desirable to set a fuse to tell the device what type its clock source is.

Canned oscillators are handy if multiple devices need to run from the same clock. They're also simpler to set up than crystals are (no caps needed) so I frequently (no pun intended...) use one when breadboarding.

The device you have isn't a crystal. It is a packaged oscillator. It almost certainly contains a crystal, but it also contains much more. Check to see if the PIC you are using can be configured for an external oscillator. If it can, use the connection instructions associated with that. The two capacitors that the standard circuits use will be useless in your case. Pin 8 has the clock signal. The rest of them don't connect to the PIC (although Vdd and GND must be connected to their respective power lines, which will also be connected to the PIC).

You have a canned oscillator. Connect it to OSC1/IN Set the pic up for external oscillator. Make sure you have a low impedance connection between the oscillator's ground pin, and the pic's ground pin(s) otherwise you could be radiating a lot of RF noise.

For using crystals (two pin device), get a copy of the crystal's data sheet, and go here: