1. The problem statement, all variables and given/known data I'm trying to hook up crystal oscillator package on breadboard and test for expected operation: I'm not sure how and cannot find any data sheets for the pin connection diagrams, I attached an image I found of the kind of package I'm using. There are four pins. 2. Relevant equations; Attempt Solution The package is supposed to be equivalent to a CRL series circuit in parallel with another capacitor, as if you were measuring over the capacitor in parallel. (I attached a diagram). The values for the elements in the C-CLR circuit are for a .5 MHz crystal oscillator (that's what's given in my text)...I have crystal oscillator packages with varying operation frequencies...but I think I can assess how it should behave just by comparing to C-CLR circuit. I just don't know how to wire a crystal exactly...is there a ground?