The QT789 from Q-Tech Corporation is a Space Qualified Oscillator with Frequency 250 KHz to 162.5 MHz, Temperature Stability ±15 ppm, ±25 ppm, ±50 ppm, ±65ppm, ±75 ppm, ±100 ppm, Supply Voltage 2.375 to 3.465 V, Output Current 4 to 50 mA, Rise/Fall Time 3 to 6 ns. Tags: Through Hole. More details for QT789 can be seen below.