The FCPL3644-26 from Synergy Microwave Corporation is a Frequency Synthesizer with Frequency 360 to 440 MHz, Reference Frequency 26 MHz, Output Power 4 dBm, Supply Voltage 5 V, Current 10 to 40 mA. Tags: Surface Mount, PLL Frequency Synthesizer. More details for FCPL3644-26 can be seen below.