The LTC6946-1 from Analog Devices is a Frequency Synthesizer with Frequency 373 MHz to 3.74 GHz, Reference Frequency 10 to 250 MHz, Spurious -103 dBc, Supply Voltage 3.6 V, Current 250 µA to 11.2mA. Tags: Surface Mount, PLL Frequency Synthesizer. More details for LTC6946-1 can be seen below.