The ECX-L37BN-66.666 from ECS Inc. International is a General Crystal Oscillator with Frequency 66.666 MHz, Supply Voltage 3.3 V, Current 18 mA, Frequency Stability ±50 ppm, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount. More details for ECX-L37BN-66.666 can be seen below.