SY02-PLL2 Datasheet | Raltron Electronics

SYNCHRONOUS EQUIPMENT CLOCK/SYNCHRONIZER - 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 telemunication 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 telemunication equipment. RALTRON ELECTRONICS CORP. ! 10651 N.W.19 St ! Florida 33172 ! U.S.A. Tel: 305 593-6033 ! Fax: 305-594-3973 ! e-mail: sales@raltron. ! Internet: http://.raltron. th SYNCHRONOUS EQUIPMENT CLOCK/SYNCHRONIZER - SY02-PLL2 ALARM REF OUT CNT FREE-RUN REFA REFB MUX, FPD, Counters & Logic LOOP FILTER 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 telemunication 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 will be used. The loop bandwidth is optimized according to used VCXO and wanted output performance. The ALARM output signal monitors the status of the phase loop in case of Loss of Lock (LOL) and Loss of Reference (LOR) both internal signals. The two control inputs provides module to go into free-run regardless of the reference (FREE_RUN) and to the tri-state high impedance output (OUT EN). The SMD package dimensions are 19.4 x 20.3 mm and power supply is 3.3V. - INPUT REFERENCE...