The HMC837LP6CE from Analog Devices is a Phase Locked Loop with Frequency 1025 to 4600 MHz, Phase Noise -171 to -62 dBc/Hz, Output Power -3 to 13 dBm, Harmonic Suppression -61 to -21 dBc, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Fractional-N PLL, Integer-N PLL. More details for HMC837LP6CE can be seen below.