synchronous equipment clock/synchronizer - sy0002 raltron electronics corp. 10651 n.w.19 th st florida 33172 u.s.a. tel: 305 593-6033 fax: 305-594-3973 e-mail: sales@raltron.com internet: http:/www.raltron.com sy0002 date: august 22, 2001 introduction the sy0002 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; - four selectable references inputs: 8, 16, 32 and 64khz; - alarms and status; - buffered reference output; - tristate (high impedance) reference and oscillators outputs; - provides free running clock output; - the unit changes timing modes in response to external events; - j-tag service port for re-programming and servicing; applications - atm - sdh - pdh - sonet - other telecommunication equipment.
synchronous equipment clock/synchronizer - sy0002 raltron electronics corp. 10651 n.w.19 th st florida 33172 u.s.a. tel: 305 593-6033 fax: 305-594-3973 e-mail: sales@raltron.com internet: http:/www.raltron.com description the sy0002 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. the sy0002 can lock to one of four reference frequencies from 8 to 64khz that can be selected using to external select pins. the counters, phase detector and other logic are implemented in programmable logic. the loop bandwidth is optimized according to used vcxo and wanted output performance. the two output signals monitor the status of the phase loop lol (loss of lock) and lor (loss of reference). the two control inputs provides module to go into free-run regardless of the reference (free_run) and to the tristate high impedance output (out en). the smd package dimensions are 19.4 x 20.3 mm and power supply is 3.3v. - input reference selection in-a in-b reference selected 0 0 8khz (default) 1 0 16khz 0 1 32khz 1 1 64khz - output programming en out free-run output 0 0 locked to reference 1 x hi-z tri-state 0 1 free-run - alarm states lol lor alarm 0 0 no alarm 1 0 loss of lock 0 1 loss of reference mux, fpd, counters & logic loop filter vcxo in-a in-b ref in lor ref out j-tag port out en out free-run lol
synchronous equipment clock/synchronizer - sy0002 raltron electronics corp. 10651 n.w.19 th st florida 33172 u.s.a. tel: 305 593-6033 fax: 305-594-3973 e-mail: sales@raltron.com internet: http:/www.raltron.com pin description pin # name description 1 ref out reference output -> the buffered signal from reference in pin. 2 tck j-tag port for factory usage ? tck 3 tms j-tag port for factory usage ? tms 4 gnd ground 5 free-run free-run -> control input to force unit to run as free running oscillator 6 lor loss of reference -> output signal shows presence of the reference 7 lol loss of lock -> output signal shows status of the pll 8 ref in reference input -> reference input signal 9 out oscillator output -> output of the module 10 out en output enable -> control input to enable/disable the module output 11 vcc positive supply voltage 12 tdo j-tag port for factory usage ? tdo 13 in-b external reference 1 input -> select input from reference 1 14 in-a external reference 2 input -> the input from reference 2 ordering information sy0002-19.44 output frequency 19.44mhz sy0002-38.88 output frequency 38.88mhz sy0002-77.76 output frequency 77.76mhz - for other frequencies contact the factory! specification general specifications mechanical 19.4 x 20.3 mm smt module fr4 14pins dual-in-line power 3.3vdc, <100ma regulated environment operating temperature 0c to 70c storage temperature -40 to 85c humidity 5% to 95% non-condensing internal oscillators voltage controlled crystal oscillator (vcxo) input signals number of reference inputs 1 input reference frequency 8, 16, 32 and 64khz select by external pins signal level hcmos/ttl compatible output signals number of outputs 2 output 1 19.44, 38.88, 77.76mhz user defined output 1 signal level hcmos output 2 buffered ref in output 2 signal level hcmos tracking/capture range 25ppm min signal quality performance jitter generation < 0.001ui jitter tolerance 2 m s, 10 hz (0.05 ui @ 8khz) frequency output performance free run accuracy 20ppm max. @ 25c no reference signal
synchronous equipment clock/synchronizer - sy0002 raltron electronics corp. 10651 n.w.19 th st florida 33172 u.s.a. tel: 305 593-6033 fax: 305-594-3973 e-mail: sales@raltron.com internet: http:/www.raltron.com outline drawing .820 (20.83 mm) 1 .650 (16.51 mm) .100 (2.54mm) .050 (1.27 mm) 14 pcb footprint .080 (2.03 mm) .620 (15.7mm) .800 (20.32 mm) .770 (19.56 mm) .78 (19.81 mm) marking label 8 7 .100 (2.54mm) .085 (2.16 mm) .0180 (.46 mm) .450 max. (11.43mm max. tabs .580 (14.73 mm)
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