The APL1666-R from ASB Inc. is a Frequency Synthesizer with Frequency 1.666 GHz, Reference Frequency 10 MHz, Output Power 3 to 7 dBm, Harmonics -25 to -20 dBc, Spurious -70 to -65 dBc. Tags: Surface Mount, PLL Frequency Synthesizer. More details for APL1666-R can be seen below.