I am trying to figure out the difference between crystals, oscillators, and resonators. I'm starting to grasp it but I still have some questions.
From my understanding, an oscillator is built from a crystal and two capacitors. What is a resonator then? Is it a difference in terminology?
If an oscillator and a resonator are similar, why do these two items(take them as an example):
HWZT-16.00MD (http://www.kynix.com/Parts/2617787/HWZT-16.00MD.html) VS FCR16.0M2G (http://www.kynix.com/Parts/2618073/FCR16.0M2G.html) have two pins out and no ground.
Whereas ZTT-16.00MX (http://www.kynix.com/Parts/2617722/ZTT-16.00MX.html) has three pins one of which is a ground?
Will any of these three devices work as an external clock for a microcontroller?