The TX14-28xxx from Connor-Winfield Corporation is a Space Qualified Oscillator with Frequency 1 to 50 MHz, Frequency Stability ±0.50 ppm, Supply Voltage 3.3 to 5 V, Output Current 1.3 to 12 mA, Rise/Fall Time 8 ns. Tags: Through Hole. More details for TX14-28xxx can be seen below.