The XO2521BM from Dynamic Engineers is a Clock Oscillator with Frequency 19 to 60 MHz, Supply Voltage 1.8 to 3.3 V, Current 5 to 10 mA, Phase Noise -152 to -136 dBc/Hz, Phase Noise 1 kHz -152 dBc/Hz. Tags: Surface Mount. More details for XO2521BM can be seen below.