5V/3.3V DUAL
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– Frequency doubler mode
в– Low jitter design
в– PECL differential outputs
в– PECL and TTL reference voltages available
в– External loop filter optimizes performance/cost
в– Available in 28-pin PLCC package The SY89420V device consists of two identical, low
jitter, digital Phase Locked Loops based on Micrel-Synergy's
differential PLL technology. Each of the PLLs (PLLA and
PLLB) is capable of operating in the 30MHz to 560MHz
input reference frequency range independently of the other
and is configurable separately. The PLLs can be configured
to be matched in all regards, or can be configured so that
PLLB is used as a frequency doubler, while PLLA is used
to regenerate the undoubled frequency.
Two reference inputs (RINX and RINX), two feedback
inputs (FINX and FINX), two filter pins (F1X and F2X) and
two differential outputs (FOUTX and FOUTX) are provided
for each of the two PLLs. The reference and feedback …