The CPLL66-3900-4300 from Crystek Corporation is a Phase Locked Loop with Frequency 3.9 to 4.3 GHz, Phase Noise -120 to -75 dBc/Hz, Output Power -2 to 5 dBm, Harmonic Suppression -25 to -15 dBc, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount. More details for CPLL66-3900-4300 can be seen below.