The T1254 from Greenray Industries is a Space Qualified Oscillator with Frequency 10 to 100 MHz, Frequency Stability ±1 ppm, Load Sensitivity 0.07 ppb/g(Ultra-low acceleration sensitivity), Supply Voltage 3.3 to 5 V, Operating Temperature -20 to 70 Degree C. Tags: Surface Mount. More details for T1254 can be seen below.