The SFS2560A-LF from Z-COMM is a Frequency Synthesizer with Frequency 2.56 GHz, Reference Frequency 100 MHz, Output Power 3 to 9 dBm, Spurious -60 dBc, Supply Voltage 3 V. Tags: Surface Mount, PLL Frequency Synthesizer. More details for SFS2560A-LF can be seen below.