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MSTM-S3-T2NC-R

更新时间： 2024-11-04 21:15:19
品牌 Logo 应用领域
CONNOR-WINFIELD /
页数 文件大小 规格书
8页 183K
描述
Clock Generator,

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MSTM-S3-T2NC-R 数据手册

 浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第2页浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第3页浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第4页浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第5页浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第6页浏览型号MSTM-S3-T2NC-R的Datasheet PDF文件第7页 
NETWORK ELEMENT TIMING GENERATOR  
C O N N O R THE CONNOR-WINFIELD CORPꢀ  
2111 COMPREHENSIVE DRIVEꢀ  
AURORA, IL 60505ꢀ  
FAX (630) 851-5040ꢀ  
PHONE (630) 851-4722  
HTTP://WWWꢀCONWINꢀCOM  
W I N F I E L D  
STRATUM 3 SIMPLIFIED CONTROL  
TIMING MODULES (MSTM-S3-T2NC-R)  
Figꢀ 1  
DESCRIPTION  
The Connor-Winfield Stratum 3 Simplified Control  
Timing Module acts as a complete system clock module for general  
Stratum 3 timing applicationsꢀ The MSTM is designed for external  
control functionsꢀ 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 Runꢀ The table below illustrates the control signal  
inputs and corresponding operational states:  
MSTM-S3-T2NC-RPINASSIGNMENT  
+5Vdc  
18  
17  
16  
15  
14  
13  
12  
11  
10  
1
2
3
4
5
6
7
8
9
HOLDOVER  
REF 1  
EX REF 1  
GND  
REF 2  
EX FEF 2  
FREERUN  
GND  
GND  
In the absence of External Control Inputs (A,B), the  
MSTM enters the Free Run mode and signals an External Alarmꢀ  
The MSTM will enter other operating modes upon application of  
a proper control signalꢀ Mode 1 operation (A=1, B=0) results in  
an output signal that is phase locked to the External Reference  
Input #1ꢀ Mode 2 operation (A=0, B=1) results in an output signal  
that is phase locked to External Reference Input #2ꢀ 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 MSTMꢀ In Free Run  
mode, operation (A=0, B=0) is a guaranteed output of 4ꢀ6 ppm of  
the nominal frequencyꢀ  
ALARM OUT  
CLK_OUT  
GND  
CNTL A  
CNTL B  
PLL TVL  
SYNC_OUT  
TRI-STATE  
BOTTOM VIEW  
Figꢀ 2  
BLOCK DIAGRAM  
0
1
2
3
FREE RUN  
CNTL A  
CNTL B  
REF 1  
PLL TVL  
REF 2  
Alarm signals are generated at the Alarm Output during  
Holdover and Free Run operationꢀ Alarm Signals are also  
generated by loss-of-lock, loss of Reference, and by a Tune-Limit  
indication from the PLLꢀ 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 erroneousꢀ A high level indicates an alarm conditionꢀ Real-  
time indication of the operational mode is available at unique  
operating mode outputs on pins 1-4ꢀ  
FREE RUN  
2:4  
HOLD OVER  
HOLD OVER  
ALARM OUT  
LOCK AND  
EX REF 1  
EX REF 2  
PHASE  
COMPARATOR  
DETECTION  
2:1  
MUX  
SYNC_OUT  
DAC  
FILTERS  
STRATUM3  
OCXO  
DAC  
TUNING  
VOLTAGE  
MONITOR  
FIFO  
PLL_TVL  
Control loop filters effectively attenuate any reference  
jitter and smooth out phase transientsꢀ  
MSTM-S3-T2NC-R  
TABLE 1ꢀ0  
CONTROL  
INDICATOR PIN  
OUTPUTS  
OPERATIONAL MODE  
INPUT  
HOLD  
ALARM  
A
0
B
0
REF 1  
REF2  
0
FREE RUN PLL_TV L  
OVER  
TRI-STATE  
0
OUTPUT  
1
FREE RUN MODE (DEFAULT)  
0
0
1
0
EXTERNAL  
REFERENCE  
#1  
NORMAL  
PLL TUNING VOLTAGE LIMIT  
LOR + LOL  
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
0
0
1
0
0
1
MODE  
EXTERNAL  
REFERENCE  
#2  
NORMAL  
0
0
0
1
1
1
0
0
0
0
0
0
0
1
0
0
1
1
PLL TUNING VOLTAGE LIMIT  
LOR + LOL  
MODE  
0
1
1
1
HOLD OVER MODE  
TRI-STATE MODE  
0
0
1
0
0 or 1  
1
X
X
HIGH IMPEDANCE  
PRELIMINARY  
Specifications subject to change without noticeꢀ  
TM025  
DATA SHEET #: _______ PAGE___1___ OF _____8__ REV:___P_0_0___ DATE:__6_/_2_5_/0_1_____  
12345678

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