The XE642S - L00 from Xsis Electronics is a Space Qualified Oscillator with Frequency 450 KHz to 125 MHz, Frequency Stability ±10 to ±100 PPM, Input Current 3 to 35 mA, Rise/Fall Time 3 to 5 nS, Start-up Time 10 mS. Tags: Ceramic, Surface Mount, Leaded. More details for XE642S - L00 can be seen below.