The XE73S – Ax from Xsis Electronics is a Space Qualified Oscillator with Frequency 500 KHz to 90 MHz, Frequency Stability ±25 to ±100 PPM, Input Current 5 to 50 mA, Rise/Fall Time 3 to 5 nS, Start-Up Time 10 mS. Tags: Ceramic, Surface Mount, Through Hole. More details for XE73S – Ax can be seen below.