SI4122

Si4133 Si4123/22/13/12 D U A L - B A N D R F S Y N T H E S I Z E R W I T H I N TE G R A T E D V C O S F OR W I R E L E S S C O M M U N I C A T I O N S FEATURES  Dual-band RF synthesizers RF1:      900 MHz to 1.8 GHz RF2: 750 MHz to 1.5 GHz    IF synthesizer IF: 62.5 to 1000 MHz Integrated VCOs, loop filters,  varactors, and resonators Minimal (2) number of external components required Low phase noise Programmable powerdown modes 1 µA standby current 18 mA typical supply current 2.7 to 3.6 V operation Packages: 24-pin TSSOP, 28-lead QFN Lead-free Ordering Information: See page 31. and RoHS compliant Applications      Pin Assignments Dual-band communications Digital cellular telephones GSM 850, E-GSM 900, DCS 1800, PCS 1900 Digital cordless phones Analog cordless phones Wireless local loop Si4133-GT SCLK SDATA GNDR RFLD 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SEN VDDI IFOUT GNDI IFLB IFLA GNDD VDDD GNDD XIN PWDN AUXOUT Description http://www.DataSheet4U.net/ RFLC GNDR RFLB RFLA GNDR GNDR RFOUT The Si4133 is a monolithic integrated circuit that performs both IF and dualband RF synthesis for wireless communications applications. The Si4133 includes three VCOs, loop filters, reference and VCO dividers, and phase detectors. Divider and powerdown settings are programmable with a threewire serial interface. Functional Block Diagram VDDR XIN SDATA IFOUT GNDR Reference Amplifier Powerdown Control R Si4133-GM SCL...