SI4123G Datasheet, Silicon Laboratories

" " RF1: 900 MHz to 1.8 GHz RF2: 750 MHz to 1.5 GHz IF: 500 MHz to 1000 MHz ! ! ! ! ! ! IF Synthesizer " Integrated VCOs, Loop Filters, ! ! Varactors, and Resonators.

Pin Assignments ! GSM, DCS1800, and PCS1900 Cellular Telephones ! ! GPRS Data Terminals HSCSD Data Terminals S C LK S.