The ECX-H33BM-54.500 from ECS Inc. International is a General Crystal Oscillator with Frequency 54.5 MHz, Supply Voltage 3.3 V, Current 40 mA, Frequency Stability ±50 ppm, Operating Temperature -20 to 70 Degree C. Tags: Surface Mount. More details for ECX-H33BM-54.500 can be seen below.