The SP5658 is a single chip frequency synthesiser designed for tuning systems up to 2.7GHz.
The RF preamplifer contains a divide by two prescaler which can be disabled for applications up to 2GHz so enabling a step size equal to the comparison frequency up to 2GHz and twice the comparison frequency up to 2.7GHz.
   
FEATURES
■ Complete 2.7GHz single chip system
■ Optimised for low phase noise
■ Selectable divide by two prescaler
■ Selectable reference division ratio
■ Charge pump disable
■ Varactor line disable
■ ‘In–lock’ flag
■ Two switching ports in 14 pin version
■ Four switching ports in 16 pin version
■ Pin compatible with SP5659 I 2 C bus low
    phase noise synthesiserPP
■ ESD protection (Normal ESD handling procedures
    should be observed)
   
APPLICATIONS
■ SAT, TV, VCR and Cable tuning systems
■ Communications systems