The APL1670 from ASB Inc. is a Frequency Synthesizer with Frequency 1.64 to 1.7 GHz, Step Size 200 KHz, Reference Frequency 10 MHz, Output Power 3 to 7 dBm, Harmonics -20 dBc. Tags: Surface Mount, PLL Frequency Synthesizer. More details for APL1670 can be seen below.