The APL1607.5 from ASB Inc. is a Frequency Synthesizer with Frequency 1.57 to 1.645 GHz, Step Size 10 KHz, Reference Frequency 10 MHz, Output Power 2 to 6 dBm, Harmonics -25 to -20 dBc. Tags: Surface Mount, PLL Frequency Synthesizer. More details for APL1607.5 can be seen below.