SMTM-S3-T2-FD

SMTM-S3-T2-FD CONNOR-WINFIELD | Alldatasheet

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Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 1 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) TCXO CNTL A CNTL B BLOCK DIAGRAM R2-CHK EX REF 1 EX REF 2 VALID_R1R1-CHK Fig. 2.0

DESCRIPTION

The Connor-Winfield Stratum 3 Miniature Simplified Control Timing Module acts as a complete system clock module for general Stratum 3 timing applications. The MSTM is designed for external control functions. Full external control input allows for selections and monitoring of any of four possible operating states: 1) Holdover, 2) External Reference #1, 3) External Reference #2, and 4) Free Run. The table below illustrates the control signal inputs and corresponding operational states: In the absence of External Control Inputs (A,B), the MSTM enters the Free Run mode and signals an External Alarm. The MSTM will enter other operating modes upon application of a proper control signal. Mode 1 operation (A=1, B=0) results in an output signal that is phase locked to the External Reference Input #1. Mode 2 operation (A=0, B=1) results in an output signal that is phase locked to External Reference Input #2. Holdover mode operation (A=1, B=1) results in an output signal at or near the frequency as determined by the latest (last) locked-signal input values and the holdover performance of the MSTM. The primary feature of this model is the Reference Frequency Detector (RFD). This is an independent circuit that monitors both reference inputs simultaneously to determine that a signal is present and its frequency is within a valid range. A logical one on the outputs VALID_R1 and VALID_R2 indicates that the signals applied to EX_REF1 and EX_REF2 respectively have been detected and have a frequency that is within at least +/- 4.6 ppm of nominal. A range of +/-4.6 ppm is guaranteed for the life of the module. The actual range is somewhat more than twice that to account for normal drift and aging that will occur. When, for example, the reference applied to EX_REF1 disappears, VALID_R1 will go to a logical zero within 500 microseconds. When the signal returns at a frequency within +/- 4.6 ppm of nominal the VALID_R1 output will return to a logical one after a 4-second delay. The delay is a validation period that requires the output of the frequency detector to remain stable for 4 seconds before confirming the status of the reference applied. This eliminates the incessant toggling of the frequency detector that occurs when the reference frequency is at the threshold frequency of the detector The function of the RFD is not related to the operational alarms, LOL and TVL, which monitor the operation of the PLL relative to the selected active reference. In fact the operational alarms function only at the extreme edge of the PLL operating range. This means that it is quite possible for the active reference to drift out of range of the Reference Frequency Detector and still remain well within the capture range of the PLL and not activate the operational alarms. If the o ther reference was still marked valid by the RFD it might make sense to switch to the better reference before the selected reference drifts completely out of range. Alarm signals are generated at the Alarm Output during Holdover and Free Run operation. Alarm Signals are also ge nerated by loss-of-lock, loss of Reference, and by a Tune-Limit indication from the PLL. A Tune-Limit alarm signal indicates that the OCXO tuning voltag e is approaching within 10% the limits of its lock capability and that the External Reference Input may be erroneous. A high level indicates an alarm condition. Real- time indication of the operational mode is available from outputs S0 and S1, which are determined from internal mode registers. Control loop filters effectively attenuate any reference jitter and smooth out phase transients. MSTM-S3-T2-FD PIN ASSIGNMENT BOTTOM VIEW +5Vdc EX REF 1 GND EX REF 2 GND CLK_OUT GND SYNC_OUT GND VALID_R1 VALID_R2 GND CNTL A CNTL B Fig. 1.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 2 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) Fig. 3.0 Table 1.0 CONTROL INPUT OPERATIONAL MODE Alarm Outputs State Outputs A B A0 A1 S0 S1 0 0 Free Run (Default) 0 0 0 0 1 0 External Reference #1 (While locked to Valid Ref) Normal TVL LOR LOL (>17 ppm) 0 1 External Reference #2 (While locked to Valid Ref) Normal TVL LOR LOL (>17 ppm) 1 1 Holdover 0 0 1 1 Qualification Outputs Condition VALID_R1 VALID_R2 Ref 1 Within ± 4.6ppm 1 X Ref 1 > ± 4.6 ppm 0 X Ref 1 (No Signal) 0 X Ref 2 Within ± 4.6 ppm X 1 Ref 2 > ± 4.6 ppm X 0 Ref 2 (No Signal) X 0 +5Vdc EX REF 1 GND EX REF 2 GND CLK_OUT GND SYNC_OUT GND VALID_R1 VALID_R2 GND CNTL A CNTL B LOSS OF REFERENCE MONITOR SECTION SYSTEM CONTROL AND DATA INPUTS NETWORK TIMING REFERENCE INPUT eg. BITS CLOCK, etc. FREE RUN CLOCK COPY SYSTEM CLOCK

5 VOLT DC

Table 2.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 3 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) 1µµµµ sTransient Profile -200 200 400 600 800 1000 1200 50 60 70 80 90 100 Time (s) TIE (ns) Fig. 4.0 Sample Wander Generation (TDEV) for STM/MSTM-S3 100.0E -12 1.0E -9 10.0E -9 100.0E -9 1.0E -6 Integration Time (sec) TDEV (sec) TDEV GR1244-Fig5.1 GR1244-Fig5-3 Copyright 1 998 Connor-Winfield alll rights reserved Fig 5.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 4 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) Fig. 6.0 Sample MTIE Data for STM-S3/MSTM-S3 1.0E-9 10.0E-9 100.0E-9 1.0E-6 Observation Time (s) MTIE (s) MTIE 1244-5.2 Mask (A) 1244-5.2 Mask (B) 1244-5.6 Mask GR253-5.4.4.3.2 Copyright 1998 Connor-Winfield all rights reserved CURRENT DRAW MSTM-S3-T2-FD 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0 1 02 03 04 05 06 0 TIME (S ) CURRENT (A) Fig. 7.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 5 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) Table 3.0 Table 4.0 Table 5.0 VALID REFERENCE THRESHOLDS MINIMUM NOMINAL MAXIMUM VALID_R1 ±4.6 ppm ±9.2 ppm ±13.8 ppm VALID_R2 ±4.6 ppm ±9.2 ppm ±13.8 ppm FREQUENCY DETECTOR RANGE OVER LIFETIME USE DETECTOR FREQUENCY OFFSET VALID_R1/R2 RANGE UNITS 0 ±9.2 ppm +4.6 +13.8 -4.6 ppm -4.6 +4.6 -13.8 ppm <-4.6 ppm VALID REFERENCE >4.6 ppm NO REFERENCE VALID_R1 0 1 0 0 VALID_R2 0 1 0 0 375 usec - 500 usec Delay on LOR Reference Frequency Valid Upper Limit EX_REF 1 or EX_REF 2 Valid_R1 or Valid_R2 Valid Reference Qualification Diagram (Nominal Frequency) Reference Frequency Valid Lower Limit 4 sec Delay Fig. 8

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 6 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) TABLE 6.0 ABSOLUTE MAXIMUM RATING SYMBOL PARAMETER MINIMUM NOMINAL MAXIMUM UNITS NOTES VCC Power supply voltage (Vcc to GND) -0.5 5.0 +7.0 Volts 1.0 VIN Input voltage with respect to ground -0.5 Vcc+.05 Volts 1.0 TSTG Storage temperature -65.0 +150.0 Deg. C 1.0 TABLE 7.0 INPUT AND OUTPUT CHARACTERISTICS SYMBOL PARAMETER MINIMUM NOMINAL MAXIMUM UNITS NOTES VIH High level input voltage (TLL Compatible) 2.0 V CC V VIL Low level input voltage (TLL Compatible) 0 0.8 V TIN Input signal transition time 250 nS CIN Input capacitance 15 pF VOH High level output voltage @ IOH=-8.0 mA, VCC minimum 2.4 V VOL Low level output voltage @ IOH=8.0 mA, VCC maximum 0.4 V THL Clock out transition time high-to-low, no load 4.0 nS TLH Clock out transition time low-to-high, no load 4.0 nS TRIP Input 8 KHz reference signal positive pulse width 30 nS TRIN Input 8 KHz reference signal negative pulse width 30 nS TOP Standard Operating Temperature 0 70 Deg. C TABLE 8.0 SPECIFICATIONS PARAMETER NOTES Frequency Range (SYNC_OUT) 19.44 MHz 2.0 Frequency Range (CLK_OUT) 19.44 MHz Supply Current See Fig. 7.0 Timing Reference Inputs 8 KHz 3.0 Jitter and Phase Tolerance Ref-GR-1244-CORE 4.2-4.4 Wander Generation Ref-GR-1244-CORE 5.3 Free-Run Accuracy ±4.6 ppm Holdover Stability ±0.37 ppm 4.0 Initial Offset 0.05 ppm Temperature 0.28 ppm Drift 0.04 ppm Holdover History 30 seconds Pull-in/ Hold-in Range ±4.6 ppm Minimum 5.0 Lock Time <100 secs Correction Period 125 µS TVL Alarm Reference is nearing operational limit 6.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 7 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) Fig 8.0 MSTM-S3 PACKAGE WITH COVER PIN DESCRIPTIONS MSTM- PIN # PIN NAME PIN DESCRIPTION

1 S0 State Output Bit 0

2 S1 State Output Bit 1

3 VALID_R1 Reference #1 Validation

4 VALID_R2 Reference #2 Validation

5 Gnd Ground

6 A0 Alarm Bit 0

7 CNTL A Mode control input. 8 CNTL B Mode control input.

9 A1 Alarm Bit 1

10 Gnd Ground

11 SYNC_OUT Synchronized output.

12 Gnd Ground

13 CLK_OUT Non-synchronized ±4.6 ppm Output

14 Gnd Ground

15 EX REF 2 External Reference #2 Input. (8KHz)

16 Gnd Ground

17 EX REF 1 Input. External Reference #1 Input. (8KHz) 18 +5 Vdc +5 Volt DC Supply Table 9.0

Specifications are subject to change without notice DATA SHEET #: tm023 REV. A02 FILENAME: MSTMS3T2FD.DOC DATE: 10/24/01 Page 8 of 8  Copyright 2001 Connor-Winfield all rights reserved THE CONNOR-WINFIELD CORP . Stratum 3 Simplified Control Timing Modules (MSTM-S3-T2-FD) NOTES FOR TABLES 1-7 NOTES: 1.0 Operation of this device at these or any other conditions beyond those listed under Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended periods of time may affect device reliability. 2.0 Consult factory for other frequencies. 3.0 REF-GR1244-CORE 3.2.1 R3-1. 4.0 Holdover stability is the cumulative fractional frequency offset containing Initial Offset, Temperature, and Drift components as described by Bellcore GR-1244-CORE 5.2 5.0 Pull-in range is the minimum frequency deviation on the reference inputs to the timing module that can be overcome to pull itself into synchronization with the reference. 6.0 See Table 1.0 for conditions of S0 and S1 outputs DATA SHEET REVISION HISTORY REVISION REVISION DATE NOTE A00 2/21/01 Advance Information Release A01 5/3/01 Added Table 3.0 and Fig. 8 A02 10/24/01 Corrected Table 1.0