The IQXO-439-33 from IQD Frequency Products is a General Crystal Oscillator with Frequency 50 to 250 MHz, Supply Voltage 3.3 V, Output_Voltage 0.88 to 1.81 V, Output Load 50 Ohms, Startup Time 10 ms. Tags: Surface Mount. More details for IQXO-439-33 can be seen below.