SY02-PLL2

SYNCHRONOUS EQUIPMENT CLOCK/SYNCHRONIZER - SY02-PLL2 SY02-PLL2 Date: December 12, 2003 INTRODUCTION The SY02-PLL2 is a crystal-based PLL synchronizer designed as a module level subsystem for easy incorporation into telecommunication equipment. - FEATURES Low jitter output from intrinsically low jitter VCXO; Two references inputs, user selects the frequencies; Alarms and status; Buffered reference output; Tri-state (high impedance) reference and oscillators outputs; Provides free running clock output of ±20ppm; The unit changes timing modes in response to external events; J-TAG service port for re-programming and servicing; - APPLICATIONS Line Cards ATM SDH PDH SONET Other telecommunication equipment. RALTRON ELECTRONICS CORP. ! 10651 N.W.19 St ! Florida 33172 ! U.S.A. Tel: 305 593-6033 ! Fax: 305-594-3973 ! e-mail: [email protected] ! Internet: http://www.raltron.com th SYNCHRONOUS EQUIPMENT CLOCK/SYNCHRONIZER - SY02-PLL2 FRS ALARM REF OUT CNT FREE-RUN REFA REFB MUX, FPD, Counters & Logic LOOP FILTER OUT VCXO J-TAG PORT EN OUT DESCRIPTION The SY02-PLL2 is a Phase Lock Loop has been designed as a module level subsystem for easy incorporation into telecommunication equipment. The module generates the output from a low jitter VCXO and provides recovered signal as secondary output. The SY02-PLL2 has two reference inputs with frequencies that can be selected by user from 8 to 77.76MHz. The input reference selection pin (CNT) selects which reference...