The APL1877 from ASB Inc. is a Frequency Synthesizer with Frequency 1.87 to 1.885 GHz, Step Size 100 KHz, Reference Frequency 10 MHz, Output Power 4 to 7 dBm, Harmonics -20 dBc. Tags: Surface Mount, PLL Frequency Synthesizer. More details for APL1877 can be seen below.