The QT735AC from Q-Tech Corporation is a Space Qualified Oscillator with Frequency 1.544 to 75 MHz, Temperature Stability ±25 ppm, ±50 ppm, ±100 ppm, Supply Voltage 5 V, Output Current 10 to 40 mA, Rise/Fall Time 2 to 8 ms. Tags: Surface Mount. More details for QT735AC can be seen below.