The 1319/1321 from Vectron International is a Clock Oscillator with Frequency 200 to 700 MHz, Supply Voltage 3.3 V, Output_Voltage Vcc-1.085 to Vcc-0.880, VOL=Vcc-1.830 to Vcc-1.555, Current 65 to 75 mA, Output Load 50 Ohms. More details for 1319/1321 can be seen below.