The XO5300AC-66.6666MHz-A from Dynamic Engineers is a General Crystal Oscillator with Frequency 66.66 MHz, Supply Voltage 1.8 V, Output_Voltage 0.1 to 0.9 V, Current 40 mA, Load Capacitance 15 pF. Tags: Surface Mount. More details for XO5300AC-66.6666MHz-A can be seen below.