 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MSTM-S4E Datasheet(PDF) 1 Page - Connor-Winfield Corporation |
|
||||||||||||||||||||||||||||||
MSTM-S4E Datasheet(HTML) 1 Page - Connor-Winfield Corporation |
|
|
1 / 5 page 
THE CONNOR-WINFIELD CORP. 2111 COMPREHENSIVE DRIVE. AURORA, IL 60505. FAX (630) 851-5040. PHONE (630) 851-4722 HTTP://WWW.CONWIN.COM DATA SHEET #: ____________ PAGE 1 OF 5 REV:________ DATE:____________ CONNOR WINFIELD © Copyright 2000 Connor-Winfield all rights reserved. Specifications subject to change without notice. TM015 7/3/00 01 NETWORK ELEMENT TIMING GENERATOR STRATUM 4E SIMPLIFIED CONTROL TIMING MODULES (MSTM-S4E) INT MSTM-S4E PIN ASSIGNMENT DESCRIPTION The Connor-Winfield Stratum 4E Simplified Control Timing Module acts as a complete system clock module for general Stratum 4E timing applications. The MSTM is designed for external control functions. Full external control input allows for selection and monitoring of any of four possible operating states: 1) Holdover, 2) External Reference #1, 3) External Reference #2, and 4) Free Run. TABLE 1.0 illustrates the control signal inputs and the 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. Alarm signals are generated at the Alarm Output during Holdover and Free Run operation. Alarm Signals are also generated by Loss-of-Lock, Loss-of-Reference, and by a Tune- Limit indication from the PLL. A Tune-Limit alarm signal indicates that the VCXO tuning voltage 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 at unique operating mode outputs on pins 1-4. +5Vdc EX_REF 1 GND EX_REF 2 GND CLK_OUT GND SYNC_OUT GND HOLDOVER REF_1 REF_2 FREERUN GND ALARM_OUT CNTL_A CNTL_B PLL_TVL BOTTOM VIEW Control loop filters effectively attenuate any reference jitter and smooth out phase transients. BLOCK DIAGRAM MSTM-S4E L O R T N O C T U P N I E D O M L A N O I T A R E P O1 _ F E R2 _ F E RR E V O D L O HN U R E E R FL V T _ L L P M R A L A T U P T U O AB 00 )t l u a f e D ( n u R e e r F0 0 0 1 0 1 10 l a n r e t x E e c n e r e f e R 1 # l a m r o N ti m i L e n u T L O L + R O L 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 01 l a n r e t x E e c n e r e f e R 2 # l a m r o N ti m i L e n u T L O L + R O L 0 0 0 1 1 1 0 0 0 0 0 0 0 1 0 0 1 1 11 r e v o d l o H0 0 1 0 0 1 CNTL_A CNTL_B TABLE 1.0 2:4 0 1 2 3 HOLDOVER REF 1 REF 2 FREERUN EX_REF_ 1 EX_REF_2 2:1 MUX STRATUM 4 VCXO DAC FILTERS PHASE COMPARATOR CLK_OUT SYNC_OUT PLL_TVL ALARM OUT TUNING VOLTAGE MONITOR STRATUM 4 TCXO DAC FIFO 2:1 MUX PLL_TVL FREERUN HOLDOVER LOCK AND DETECTION |
English ▼
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
