The LFSW397697-100 from Synergy Microwave Corporation is a Frequency Synthesizer with Frequency 3.97 to 6.97 GHz, Step Size 1000 MHz, Reference Frequency 10 MHz, Output Power 4 dBm, Supply Voltage 5 V. Tags: Surface Mount, PLL Frequency Synthesizer. More details for LFSW397697-100 can be seen below.