The FXO2521BM-CMOS from Dynamic Engineers is a Clock Oscillator with Frequency 1 to 200 MHz, Supply Voltage 1.8 to 3.3 V, Load Capacitance 15 pF, Startup Time 8 ms, Duty Cycle 45 to 55 %. Tags: Surface Mount. More details for FXO2521BM-CMOS can be seen below.