The APL1685 from ASB Inc. is a Frequency Synthesizer with Frequency 1.64 to 1.72 GHz, Step Size 100 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 APL1685 can be seen below.