vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com tm-056 integrated timing solution the tm-056 is a compact timing module, which functions as a complete system clock solution for general stratum 3 timing applica tions. the tm-056 uses vectrons digital and analog phase locked loop (dpll and apll) technology and can lock to 2 reference frequencies a utomatically. the module has dual output clocks ranging from 8 khz to 77.76 mhz. simple control interface with comprehensive state engine, s tatus and alarm indications and fully automatic operation makes seamless system integration of the tm-056 module. single module statum 3 synchronization solution. ? complies with telcordia gr-1244/gr-253 and itu-t g.812/g.813 ? recommendations. supports free-run, holdover and lock modes. ? accepts 2 reference inputs from frequency range 8khz to 77.76mhz. ? continuously monitors and evaluates both input reference signals ? simultaneously. provides two synchronized outputs with frequency range up to 77.76mhz. ? on board ocxo that provides excellent stability in freerun and holdover ? mode. loop ltering utilizing dpll. ? automatic hit-less switchover on loss of input. ? holdover mode with 90 seconds of history. ? alarms and status signals. ? easy to use control interface and jtag port for factory programming. ? small dimensions 1.9 x 1.9 x 0.55. ? product is compliant to rohs directive and fully compatible with lead free ? assembly. multi-service switches and routers ? atm ? gateway ? access ? edge ? core ? sonet ? sdh ? dwdm ? features applications block diagram reference monitor and selection road hudson nh cpu dpll ocxo apll output dividers r e f e r e n ce m o ni to r a n d se l ect i o n c p u dp ll oc x o ap ll o utpu t divi d er s ex ref 1 ex ref 2 cnt 1 cnt 2 out 1 out 2 ref 1 ref 2 holdover freerun alarm unlock
the tm-056 is based on a digital pll (dpll) that performs ltering of input signals, and is complemented by an analog pll (apll) required to deliver high quality output signals. the most critical element of the tm-056 is the dpll that generates a phase-locked clock, lters jitter and wander and suppresses input phase transients. all of these features are in agreement with international standards. the dpll sup ports three mandatory modes of operation. (free-run, lock and holdover). each of these modes places speci c requirements on the building blocks of the dpll. in free-run mode the output is locked to an internal ocxo, and therefore timing and synchronization signals are based on the ac curacy of on-board oscillators. this mode is typically used when a master clock source is required, not valid history of data for the hol dover mode, or immediately following system power-up before network synchronization is achieved. in holdover mode, the tm-056 generates a clock based on data collected from past reference signals when the module was locked. the holdover mode is typically used when no external reference is available. the stability of the output signal in holdover mode de pends of the stability of the on-board oscillator. by default the tm-056 uses an ocxo as an on-board oscillator, but other type of oscillato rs are available on request. in lock mode the device can be locked to one of two external reference signals. the lock mode is typically used when a slave cl ock source synchronized to the network is required. in this mode the tm-056 provides timing signals which are synchronized to one of two r eference inputs (i.e. ref1 or ref2). the input reference signals may have a variety of nominal frequencies, which are speci ed by customers. both input references are continuously monitored and evaluated by the module in terms of presence and frequency o set relative to the local oscillator. the tm-056 rejects all reference signals that are out of the frequency range of approximately 17ppm. a reference w ill be quali ed if the signal is present and within the frequency limit for more than approximately 20s. the tm-056 dynamically changes the loop bandwidth according to the status of the dpll. there are three stages for the dpll to b e locked. the rst stage is frequency acquisition that runs until the frequency becomes equal to the reference. the second stage is phase acq uisition that runs until a new phase reference is determined. the third stage is tracking when the dpll is locked and tracks the phase reference w ith very low loop bandwidth. this method with three stages ensures a minimum locking time and minimum phase jumps and shifts during rearrangement . the phase data is continuously collected for the history bu er during the time when the unit is locked to any of the input references. the history bu er is actually a circular bu er in memory that keeps valid phase data for holdover mode for the last 90 seconds of operation. when the tm-056 enters holdover mode the data from the bu er is validated and further processed. at the beginning of operation the unit has no valid history bu er. the apll is locked to dpll output and provides low jitter output. the tm-056 module provides two output signals out1 and out2. the outputs are generated by apll and scaled by the output dividers. the frequency of the apll oscillator is speci ed according to an application where the tm-056 will be used. the j-tag service port is used for on board chip programming and debugging purposes during production and testing. the port is for factory use only and any unauthorized access can damage the unit. the tm-056 provides a detailed monitoring and indications of operation mode and status of the unit. there are six digital outpu ts that report statuses and alarms of the module. these alarms are mainly used for communication between the module and equipment where the mo dule is operating. description status indications mode of operation holdover the signal is on (logic high) when tm-056 in holdover mode. ref 1 the signal is on (logic high) when tm-056 in lock mode using ex ref 1. ref 2 the signal is on (logic high) when tm-056 in lock mode using ex ref 2. free-run the signal is on (logic high) when tm-056 in free-run mode. unlock the signal in on (logic high) when tm-056 is not locked to an external reference. alarm the signal is on (logic high) when tm-056 is in holdover of free-run mode. a simple control interface is available for user to control the operation of the tm-056. the two external inputs cnt1 and cnt2 provide this feature. the truth table below shows behavior of the tm-056 module according to the control inputs states. cnt2 cnt1 mode of operation 0 0 free-run 0 1 locked to ex ref1 1 0 locked to ex ref2 1 1 holdover by changing the control inputs the user can change the state of the tm-056 accord- ing to the state engine diagram. the state engine diagram of the tm-056 shows the transients between the three operating modes: free-run, lock and holdover, shown as an ellipse, in a changing environment. the temporary operating states, showed as a circle, are used internally until one of the three modes is reached. be- sides the control inputs (cnt1 and cnt2), certain types of inputs and statuses a ect the changes in the state engine such as the availability of external references and change of the quality of the input reference signal otside prede ned limits. tm-056 status indications tm-056 mode selection vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com
free-run (1) pre-locked (6) phase lost (5) lock (4) holdover (2) reset (0) 10 1 31 13 3 63 36 6 46 64 4 54 5 65 35 34 32 21 switching (3) 23 24 26 25 2 12 14 15 16 tm-056 state engine vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com transition name/description condition 1 free-run until other conditions are not true 2 holdover until other conditions are not true 3 switching until other conditions are not true 4 lock until other conditions are not true 5 phase lost until other conditions are not true 6 pre-locked until other conditions are not true 10 reset until the internal reset ag is not set. 12 holdover to free-run if control signals are changed to cnt0=0 and cnt1=0 or no valid holdover history available. 13 switching to free-run if control signals are changed to cnt0=0 and cnt1=0 or selected reference is disquali ed and no valid holdover history available. 14 lock to free-run if control signals are changed to cnt0=0 and cnt1=0 or selected reference is disquali ed and no valid holdover history available. 15 phase lost to free-run if control signals are changed to cnt0=0 and cnt1=0 or selected reference is disquali ed and no valid holdover history available. 16 pre-locked to free-run if control signals are changed to cnt0=0 and cnt1=0 or selected reference is disquali ed and no valid holdover history available. 21 free-run to holdover if control signals are changed to cnt0=1 and cnt1=1 and valid holdover history available. 23 switching to holdover if control signals are changed to cnt0=1 and cnt1=1 or selected reference is disquali ed and valid holdover history available. 24 lock to holderover if control signals are changed to cnt0=1 and cnt1=1 or selected reference is disquali ed and valid holdover history available. 25 phase lost to holdover if control signals are changed to cnt0=1 and cnt1=1 or selected reference is disquali ed and valid holdover history available. 26 pre-locked to holdover if control signals are changed to cnt0=1 and cnt1=1 or selected reference is disquali ed and valid holdover history available. 31 free-run to switching if quali ed reference is selected by the control pins (cnt0 and cnt1). 32 holdover to switching if any changes occurred on the control pins (cnt0 and cnt1) during holdover or selected reference is qua li ed. 34 locked to switching if any changes occurred on the control pins (cnt0 and cnt1) during lock. 35 phase lost to switching if any changes occurred on the control pins (cnt0 and cnt1) during phase lost. 36 pre-locked to switching if any changes occurred on the control pins (cnt0 and cnt1) during pre-locked. 46 pre-locked to lock if the internal pre-lock ag is set. 54 locked to phase lost if the internal phase lost ag is set 63 switching to pre-locked until the internal ag is not set 64 locked to pre-locked until the internal ag is not set. 65 phase lost to pre-locked if the internal phase lost ag is not set
speci cations parameter speci cations notes power voltage +5 vdc +3.3vdc available on request supply current during warm-up 500ma @ 25?c steady state current 300ma @ 25?c input signals number of input signals 2 input reference frequency 8khz - 77.76mhz per customer request signal level lvcmos time reference characteristics telcordia: gr-1244-core 3.2.1. r3-1 output signals number of output signals 2 output 1 up to 77.76mhz per customer request output 2 up to 77.76mhz per customer request signal level output 1 lvcmos signal level output 2 lvcmos input and output reference signal characteristics input signal telcordia: gr-1244-core 3.2.1 jitter tolerance telcordia: gr-1244-core 4.2, gr-253-core 5.4.4.3.6 itu-t: g.812 type iii/iv phase transient tolerance telcordia: gr-1244-core 4.4 wander generation telcordia: gr-1244-core 5.3, gr-253-core 5.4.4.3.2 itu-t: g.812 para 11.2 type iii/iv wander tolerance telcordia: gr-1244-core 4.3 itu-t: g.825 wander transfer telcordia: gr-1244-core 5.4, gr-253-core 5.4.4.2.4 itu-t: g.812 type iii/iv mtie telcordia: gr-1244-core 5.3, gr-253-core 5.4.4.3.2 tdev telcordia: gr-1244-core 5.3, gr-253-core 5.4.4.3.2 phase transient telcordia: gr-1244-core 5.6, gr-253-core 5.4.4.3.3 jitter generation telcordia: gr-1244-core 5.5, gr-253-core 5.6.2.3 jitter transfer telcordia: gr-1244-core 5.5, gr-253-core 5.6.2.1 dpll performance free run accuracy 4.6ppm gr-1244-core 5.1 holdover stability 3.6x10-7 (stratum 3) gr-1244-core 5.2 pull in range 17ppm gr-1244-core 3.5 lock time 100s (stratum 3) gr-1244-core 3.5 lock accuracy 1x10-11 average 24h general mechanical 1.9 x 1.9 x 0.52 (48.26 x 48.26 x 13.28 mm) 18 pin package, rohs compliant operating temperature 0 to 70c -40 to 85c option available local oscillator ocxo tcxo option available absolute maximum/minimum rating symbol parameter min max unit notes v cc supply voltage -0.5 +7.0 v 1 v in v cc +0.5 v 1 t stg storage temperature -70 +155 c 1 note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those listed under recommended operating conditions are not implied. exposure to absolute max rating conditions for extended periods of time may a ect device reliability. vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com
4.06 40.64 1.600 .160 .150 3.81 1.900 48.26 1.900 48.26 .606 15.39 .025 0.64 .200 5.08 .060 1.52 pin 1 1 s transient response -200 0 200 400 600 800 1000 1200 50 55 60 65 70 75 80 85 90 95 100 time [s] tie [ns] 1 s transient response -200 0 200 400 600 800 1000 1200 50 55 60 65 70 75 80 85 90 95 100 time [s] tie [ns] the following paragraph shows typical tm-056 performances. the measurements were performed in according to telcordia gr-1244-co re recommendation using a system that emulates standard timing con guration in network equipment. for more details please contact the factory. performance tm-056 typical performance - wander generation mtie gr- 1244-core tm-056 typical performance - wander tolerance tdev gr- 1244-core tm-056 typical performance - wander generation tdev gr- 1244-core tm-056 typical performance - 1s transient response tie tdev clock, gr-1244-core: wander tolerance 0.1 1 10 10 0 1000 0.0 1 0.1 1 10 10 0 1000 1000 observation interval [sec] tdev [ns] tdev clock, gr-1244-core: wander generation 0.0 1 0.1 1 10 100 0.01 0.1 1 10 100 1000 10000 100000 observation interval [sec] tdev [ns] vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com mechanical dimensions tm-056 outline drawing soldering information the tm-056 can be soldered to the main board in following ways: wave soldering machine - using no cleaning 1. material. manual soldering - max. temperature is 370c, 2. for 2 seconds, using no clean soldering material.
18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 vcc ex ref1 gnd ex ref2 gnd out 2 gnd out 1 gnd holdover ref 1 ref 2 freerun gnd alarm cnt 1 cnt 2 unlock tm-056 pin assignment - the bottom view pin assignment the picture below shows the pin-out for the tm-056. pin name type description 1 holdover output indication that tm-056 is in holdover mode 2 ref 1 output indication that tm-056 is in lock mode C locked to ex ref 1 signal. 3 ref 2 output indication that tm-056 is in lock mode C locked to ex ref 2 signal. 4 freerun output indication that tm-056 is in free-run mode. 5 gnd ground 6 alarm output indication that tm-056 has an alarm. 7 cnt 1 input control input 1, the external input for selecting mode of tm-056 C see table. 8 cnt 2 input control input 2, the external input for selecting mode of tm-056 C see table. 9 unlock output indication that tm-056 is unlocked to any reference input signal. 10 gnd ground 11 out 1 output synchronized output 1 12 gnd ground 13 out 2 output synchronized output 2 14 gnd ground 15 ex ref 2 input external reference 2 timing input 16 gnd ground 17 ex ref 1 input external reference 1 timing input. 18 vcc power power supply input tm-056 pin description vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com
ordering information tm - 056 - x x x - x - xx xx xx xx product family tm: timing module package 056: 48.3 x 48.3 x 14.7mm supply voltage c: 5.0vdc l: 3.3vdc output type b: lvcmos operating temperature c: 0 to 70c f: -40 to 85c frequency stability a: stratum 3 b: future use sync output 2 see table sync output 1 see table reference 2 see table reference 1 see table reference frequencies synchronized outputs a3 8khz a3 8khz a4 16khz a6 10khz b3 1.544mhz b3 1.544mhz b4 2.048mhz b4 2.048mhz d5 16.384mhz d5 16.384mhz d6 19.44mhz d6 19.44mhz e7 24.704mhz e7 24.704mhz h3 32.768mhz h3 32.768mhz h6 34.368mhz h6 34.368mhz h5 38.88mhz h5 38.88mhz j3 44.736mhz j3 44.736mhz j4 51.84mhz j4 51.84mhz k2 77.76mhz k2 77.76mhz part number example: tm-056-cbc-a-a3a3d6a6 is the tm-056 module platform with 5v power supply, with lvcmos input and output sig nals, operating in 0 to 70c temperature range , complying with stratum 3, with 2 external references of 8khz, out1 is 19.44mhz and ou t2 is 10khz. contact the factory for additional frequency options. vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com frequency codes reference table version change notes version date note 1.0 5/5/2007 initial revision 1.1 5/10/2007 added rohs notes 1.2 5/15/2007 dimensions typo error on the rst page xed 1.3 9/30/2008 product release
|
