The LTC6950 from Analog Devices is a Phase Locked Loop with Frequency 1 to 1.4 GHz, Phase Noise -274 to -226 dBc/Hz, Operating Temperature -40 to 105 Degree C, PLL Current 500 mA, PLL Voltage 2.7 to 3.3 V. Tags: Surface Mount, Integer-N PLL. More details for LTC6950 can be seen below.