The LTC6948-2 from Analog Devices is a Phase Locked Loop with Frequency 510 MHz to 4.91 GHz, Phase Noise -274 to -77 dBc/Hz, Output Power -9 to 3 dBm, Operating Temperature -40 to 105 Degree C, PLL Current 0.45 to 60 mA. Tags: Surface Mount, Fractional-N PLL. More details for LTC6948-2 can be seen below.