The LTC6945 from Analog Devices is a Frequency Synthesizer with Frequency 350 MHz to 6 GHz, Reference Frequency 10 to 250 MHz, Output Power -6 to 3 dBm, Spurious -111 dBc, Supply Voltage 3.15 to 5.25 V. Tags: Surface Mount, PLL Frequency Synthesizer. More details for LTC6945 can be seen below.