TM-056

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 applications. The TM-056 uses Vectron’s Digital and Analog Phase Locked Loop (DPLL and APLL) technology and can lock to 2 reference frequencies automatically. The module has dual output clocks ranging from 8 kHz to 77.76 MHz. Simple control interface with comprehensive state engine, status and alarm indications and fully automatic operation makes seamless system integration of the TM-056 module. Features • 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 filtering 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. Applications • • • • • • • • • Multi-service Switches and Routers ATM Gateway Access EDGE Core SONET SDH DWDM Block Diagram OCXO OCXO EX REF 1 EX REF 2 Reference Reference Monitor Monitor and and Selection Selection DPLL DPLL APLL APLL Output Output Dividers Dividers OUT 1 OUT 2 CNT 1 CNT 2 CPU CPU HOLDOVER REF 1 REF 2 FREERUN ALARM UNLOCK Vectron International • 267 Lowell Road Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Road, Hudson Description The TM-056 is based on a digital PLL (DPLL) that performs filtering 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, filters jitter and wander and suppresses input phase transients. All of these features are in agreement with international standards. The DPLL supports three mandatory modes of operation. (Free-run, Lock and Holdover). Each of these modes places specific 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 accuracy of on-board oscillators. This mode is typically used when a master clock source is required, not valid history of data for the Holdover 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 depends 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 oscillators 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 clock source synchronized to the network is required. In this mode the TM-056 provides timing signals which are synchronized to one of two reference inputs (i.e. REF1 or REF2). The input reference signals may have a variety of nominal frequencies, which are specified by customers. Both input references are continuously monitored and evaluated by the module in terms of presence and frequency offset relative to the local oscillator. The TM-056 rejects all reference signals that are out of the frequency range of approximately ±17ppm. A reference will be qualified 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 be locked. The first stage is frequency acquisition that runs until the frequency becomes equal to the reference. The second stage is phase acquisition that runs until a new phase reference is determined. The third stage is tracking when the DPLL is locked and tracks the phase reference with 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 buffer during the time when the unit is locked to any of the input references. The history buffer is actually a circular buffer 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 buffer is validated and further processed. At the beginning of operation the unit has no valid history buffer. 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 specified 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 outputs that report statuses and alarms of the module. These alarms are mainly used for communication between the module and equipment where the module is operating. Status Indications HOLDOVER REF 1 REF 2 FREE-RUN UNLOCK ALARM Mode of Operation The signal is ON (logic high) when TM-056 in Holdover mode. The signal is ON (logic high) when TM-056 in Lock mode using EX REF 1. The signal is ON (logic high) when TM-056 in Lock mode using EX REF 2. The signal is ON (logic high) when TM-056 in Free-run mode. The signal in ON (logic high) when TM-056 is not locked to an external reference. 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. TM-056 Status Indications CNT2 0 0 1 1 CNT1 0 1 0 1 Mode of Operation Free-run Locked to EX REF1 Locked to EX REF2 Holdover By changing the control inputs the user can change the state of the TM-056 according 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. Besides the control inputs (CNT1 and CNT2), certain types of inputs and statuses affect the changes in the state engine such as the availability of external references and change of the quality of the input reference signal otside predefined limits. TM-056 Mode selection Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Reset (0) 10 1 16 3 13 31 Switching (3) Free-run (1) 12 32 23 21 2 Holdover (2) 14 TM-056 State Engine 6 36 63 34 46 26 Lock (4) 4 54 24 Pre-Locked (6) 64 15 35 65 Phase Lost (5) 5 25 Transition 1 2 3 4 5 6 10 12 13 14 15 16 21 23 24 25 26 31 32 34 35 36 46 54 63 64 Name/Description Free-run Holdover Switching Lock Phase Lost Pre-Locked Reset Holdover to Free-run Switching to Free-run Lock to Free-run Phase Lost to Free-run Pre-Locked to Free-run Free-run to Holdover Switching to Holdover Lock to Holderover Phase Lost to Holdover Pre-Locked to Holdover Free-run to Switching Holdover to Switching Locked to Switching Phase Lost to Switching Pre-Locked to Switching Pre-Locked to Lock Locked to Phase Lost Switching to Pre-Locked Locked to Pre-Locked Condition Until other conditions are not true Until other conditions are not true Until other conditions are not true Until other conditions are not true Until other conditions are not true Until other conditions are not true Until the internal reset flag is not set. If control signals are changed to CNT0=0 and CNT1=0 or no valid Holdover history available. If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover history available. If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover history available. If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover history available. If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover history available. If control signals are changed to CNT0=1 and CNT1=1 and valid Holdover history available. If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover history available. If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover history available. If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover history available. If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover history available. If qualified reference is selected by the control pins (CNT0 and CNT1). If any changes occurred on the control pins (CNT0 and CNT1) during Holdover or selected reference is qualified. If any changes occurred on the control pins (CNT0 and CNT1) during Lock. If any changes occurred on the control pins (CNT0 and CNT1) during Phase Lost. If any changes occurred on the control pins (CNT0 and CNT1) during Pre-Locked. If the internal Pre-lock flag is set. If the internal Phase Lost flag is set Until the internal flag is not set Until the internal flag is not set. 65 Phase Lost to Pre-Locked If the internal Phase Lost flag is not set Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Specifications Parameter Voltage Supply Current During Warm-up Steady State Current Specifications Power +5 VDC 500mA 300mA Notes +3.3VDC available on request @ 25˚C @ 25˚C Input Signals Number of Input Signals Input Reference Frequency Signal Level Time Reference Characteristics 2 8kHz - 77.76MHz LVCMOS Telcordia: GR-1244-CORE 3.2.1. R3-1 Per customer request Output Signals Number of Output Signals Output 1 Output 2 Signal Level Output 1 Signal Level Output 2 2 up to 77.76MHz up to 77.76MHz LVCMOS LVCMOS Per customer request Per customer request Input and Output Reference Signal Characteristics Input Signal Jitter Tolerance Phase Transient Tolerance Wander Generation Wander Tolerance Wander Transfer MTIE TDEV Phase Transient Jitter Generation Jitter Transfer Telcordia: GR-1244-CORE 3.2.1 Telcordia: GR-1244-CORE 4.2, GR-253-CORE 5.4.4.3.6 Telcordia: GR-1244-CORE 4.4 Telcordia: GR-1244-CORE 5.3, GR-253-CORE 5.4.4.3.2 Telcordia: GR-1244-CORE 4.3 Telcordia: GR-1244-CORE 5.4, GR-253-CORE 5.4.4.2.4 Telcordia: GR-1244-CORE 5.3, GR-253-CORE 5.4.4.3.2 Telcordia: GR-1244-CORE 5.3, GR-253-CORE 5.4.4.3.2 Telcordia: GR-1244-CORE 5.6, GR-253-CORE 5.4.4.3.3 Telcordia: GR-1244-CORE 5.5, GR-253-CORE 5.6.2.3 Telcordia: GR-1244-CORE 5.5, GR-253-CORE 5.6.2.1 ITU-T: G.812 para 11.2 Type III/IV ITU-T: G.825 ITU-T: G.812 Type III/IV ITU-T: G.812 Type III/IV DPLL Performance Free Run Accuracy Holdover Stability Pull in Range Lock Time Lock Accuracy ≤ ±4.6ppm ≤ ±3.6x10-7 (Stratum 3) ≥ ±17ppm ≤ 100s (Stratum 3) ≤1x10-11 GR-1244-CORE 5.1 GR-1244-CORE 5.2 GR-1244-CORE 3.5 GR-1244-CORE 3.5 Average 24h General Mechanical Operating Temperature Local Oscillator 1.9” x 1.9” x 0.52” (48.26 x 48.26 x 13.28 mm) 0 to 70°C OCXO 18 pin package, RoHS compliant -40 to 85°C option available TCXO option available Absolute Maximum/Minimum Rating Symbol Parameter VCC VIN TSTG Storage Temperature -70 Supply Voltage Min -0.5 Max +7.0 VCC +0.5 +155 Unit V V C Notes 1 1 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 affect device reliability. Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Performance The following paragraph shows typical TM-056 performances. The measurements were performed in according to Telcordia GR-1244-CORE recommendation using a system that emulates standard timing configuration in network equipment. For more details please contact the factory. TDEV Clock, GR-1244-CORE: Wander Tolerance 1000 10 0 TDEV [ns] 10 1 0.0 1 0.1 1 10 10 0 1000 1000 0.1 Observation Interval [sec] TM-056 typical performance - Wander Generation MTIE GR1244-CORE TDEV Clock, GR-1244-CORE: Wander Generation 100 TM-056 typical performance - Wander Tolerance TDEV GR1244-CORE 11μsTransient Response μs Transient Response 1200 1200 1000 1000 10 800 800 TDEV [ns] 1 0.01 0.1 1 10 100 1000 10000 100000 TIE [ns] TIE [ns] 600 600 400 400 0.1 200 200 0 0 50 50 -200 -200 55 55 60 60 65 65 70 70 75 75 80 80 85 85 90 90 95 95 100 100 0.0 1 Observation Interval [sec] Time [s] Time [s] TM-056 typical performance - Wander Generation TDEV GR1244-CORE TM-056 typical performance - 1μs Transient Response TIE Mechanical Dimensions 1.900 48.26 Soldering Information The TM-056 can be soldered to the main board in following ways: 1. Wave soldering machine - using no cleaning material. 2. Manual soldering - max. Temperature is 370°C, for 2 seconds, using no clean soldering material. 1.900 48.26 TM-056 Outline Drawing .606 15.39 .060 1.52 PIN 1 .200 5.08 .025 0.64 .160 4.06 1.600 40.64 .150 3.81 Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Pin Assignment The picture below shows the pin-out for the TM-056. VCC EX REF1 GND EX REF2 GND OUT 2 GND OUT 1 GND 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 HOLDOVER REF 1 REF 2 FREERUN GND ALARM CNT 1 CNT 2 UNLOCK TM-056 Pin Assignment - The Bottom View Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Name HOLDOVER REF 1 REF 2 FREERUN GND ALARM CNT 1 CNT 2 UNLOCK GND OUT 1 GND OUT 2 GND EX REF 2 GND EX REF 1 VCC Type Output Output Output Output Description Indication that TM-056 is in Holdover mode Indication that TM-056 is in Lock mode – locked to EX REF 1 signal. Indication that TM-056 is in Lock mode – locked to EX REF 2 signal. Indication that TM-056 is in Free-run mode. Ground Output Input Input Output Indication that TM-056 has an alarm. Control Input 1, the external input for selecting mode of TM-056 – see table. Control Input 2, the external input for selecting mode of TM-056 – see table. Indication that TM-056 is unlocked to any reference input signal. Ground Output Synchronized Output 1 Ground Output Synchronized Output 2 Ground Input External reference 2 timing input Ground Input Power External reference 1 timing input. 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 70°C F: -40 to 85°C 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 A3 A4 B3 B4 D5 D6 E7 H3 H6 H5 J3 J4 K2 8kHz 16kHz 1.544MHz 2.048MHz 16.384MHz 19.44MHz 24.704MHz 32.768MHz 34.368MHz 38.88MHz 44.736MHz 51.84MHz 77.76MHz Synchronized Outputs A3 A6 B3 B4 D5 D6 E7 H3 H6 H5 J3 J4 K2 8kHz 10kHz 1.544MHz 2.048MHz 16.384MHz 19.44MHz 24.704MHz 32.768MHz 34.368MHz 38.88MHz 44.736MHz 51.84MHz 77.76MHz Frequency codes reference table Part number example: TM-056-CBC-A-A3A3D6A6 is the TM-056 module platform with 5V power supply, with LVCMOS input and output signals, operating in 0 to 70°C temperature range, complying with Stratum 3, with 2 external references of 8kHz, OUT1 is 19.44MHz and OUT2 is 10kHz. Contact the factory for additional frequency options. Version Change Notes Version 1.0 1.1 1.2 1.3 Date 5/5/2007 5/10/2007 5/15/2007 9/30/2008 Note Initial Revision Added RoHS Notes Dimensions Typo error on the first page fixed Product Release Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com