EA1216 Series Quartz Crystals Ecliptek EA1216 Quartz Crystals are crystal resonators that exhibit parallel resonance and are made of ceramic-type material with surface mount terminals. The EA1216 quartz crystals have an AT-Cut fundamental crystal mode of operation. These crystal resonators possess a maximum of 100µW drive level with a -3dB spurious response. The EA1216 quartz crystals offer 8pF to 32pF parallel resonating load capacitance.