SY02-HPLL Datasheet | Raltron Electronics

SYNCHRONOUS EQUIPMENT HIGH FREQUENCY CLOCK/SYNCHRONIZER - SY02-HPLL Date: May 18, 2004 - INTRODUCTION The SY02-HPLL is a high frequency 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 or VCSO; Two references inputs from 8k Hz to 77.76MHz; (see table on pg. 3) One high frequency LVPECL output with enable/disable function from 51.84MHz to 800MHz (see table on pg. 3) Alarms and status; Provides free running clock output; The unit changes timing modes in response to external events; J-TAG service port for re-programming and servicing; 3.3V DC power supply Small dimensions: 0.96” x 1.050” - - APPLICATIONS 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 HIGH FREQUENCY CLOCK/SYNCHRONIZER - SY02-HPLL ALARM FRS REF A IN REF B IN SEL FR MUX, FPD, Counters & Logic LOOP FILTER VCXO J-TAG PORT EN OUT - DESCRIPTION The SY02-HPLL is a High Frequency Phase Lock Loop has been designed as a module level subsystem for easy incorporation into telemunication equipment. The module generates the high frequency (up to 622.08MHz) output from a low jitter VCXO or VCSO (SAW based oscillators). The output can be disabled externally by setting OUTEN pin high. The SY02-HPLL can be locked to one of two reference inputs frequencies of 8 k Hz. The module has fast locking time and tolerates reference inputs with different duty cycles. The loop bandwidth is optimized according to used VCXO and wanted output performance. The ALARM output signals monitor the status of the phase loop LOL (Loss of Lock) and LOR (Loss of Reference). If the both references REFA and REFB are absent SY02-HPLL will automatically switch to free run mode and...