The ECX-H37CM-12.288 from ECS Inc. International is a General Crystal Oscillator with Frequency 12.288 MHz, Supply Voltage 3.3 V, Current 25 mA, Frequency Stability ±25 ppm, Operating Temperature -20 to 70 Degree C. Tags: Surface Mount. More details for ECX-H37CM-12.288 can be seen below.