The XD81S from Xsis Electronics is a Space Qualified Oscillator with Frequency 100 to 200 MHz, Frequency Stability ±25 to ±100 PPM, Input Current 65 mA, Supply Voltage 2.5 to 3.3 V, Rise/Fall Time 600 to 700 pS. Tags: Ceramic, Surface Mount, Leaded. More details for XD81S can be seen below.