The HMC821LP6CE from Analog Devices is a Phase Locked Loop with Frequency 860 to 1040 MHz, 1720 to 2080 MHz, 3440 to 4160 MHz, Phase Noise -166 to -75 dBc/Hz, Output Power -4 to 12.5 dBm, Harmonic Suppression -68 to -18 dBc, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Fractional-N PLL. More details for HMC821LP6CE can be seen below.