5V/3.3V
HIGH-PERFORMANCE
PHASE LOCKED LOOP
FEATURES DESCRIPTION в– 3.3V and 5V power supply options
в– 1.12GHz maximum VCO frequency
в– 30MHz to 560MHz reference input operating
frequency
в– External 2.0GHz VCO capability
в– Low jitter differential design
в– Frequency doubler mode
в– PECL Differential output
в– External loop filter optimizes performance/cost
в– Available in 20-pin SOIC package The SY89421V is a digital Phase Locked Loop based on
Micrel-Synergy's 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.
Feedback for the loop is realized by connecting FOUT, …