The Si591 from Silicon Labs is a XO with Frequency 10 to 810 MHz, Supply Voltage 1.8 to 3.3 V, Frequency Stability +/-30 - 100 ppm, Current 80 mA, Jitter Period Jitter: 3 ps(RMS), Phase Jitter: 0.5 ps(RMS). Tags: Surface Mount. More details for Si591 can be seen below.