DESCRIPTION
The SY89421V is a digital Phase Locked Loop based on Micrel-Synergys differential PLL technology. It is capable of operating in the 30MHz to 560MHz reference input frequency range, and up to 2000MHz with the HFIN input and an external VCO. Use of a phase-frequency detector results in excellent PLL locking and tracking characteristics. Error correction voltages are generated by the detector if either phase or frequency deviations occur. The VCO has a frequency range covering more than a 2:1 ratio from 480MHz to 1120MHz.

FEATURES
■ 3.3V and 5V power supply options
■ 1.12GHz maximum VCO frequency
■ 30MHz to 560MHz reference input operating frequency
■ External 2.0GHz VCO capability
■ Low jitter differential design
■ Frequency doubler mode
■ PECL Differential output
■ External loop filter optimizes performance/cost
■ Available in 20-pin SOIC package

APPLICATIONS
■ Workstations
■ Advanced communications
■ High-performance computing