The ECX-H27CM-12.800 from ECS Inc. International is a General Crystal Oscillator with Frequency 12.8 MHz, Supply Voltage 2.5 V, Current 40 mA, Frequency Stability ±25 ppm, Operating Temperature -20 to 70 Degree C. Tags: Surface Mount. More details for ECX-H27CM-12.800 can be seen below.