參數(shù)資料
型號(hào)： MT9045
廠商： Mitel Networks Corporation
英文描述： T1/E1/OC3 System Synchronizer(T1/E1/OC3 系統(tǒng)同步裝置（由一個(gè)數(shù)字鎖相環(huán)組成）)
中文描述： T1/E1/OC3系統(tǒng)同步器（T1/E1/OC3系統(tǒng)同步裝置（由一個(gè)數(shù)字鎖相環(huán)組成））
文件頁數(shù)： 12/25頁
文件大小： 104K
代理商： MT9045
MT9045
Advance Information
12
MT9045 provides a fast lock pin (FLOCK), which,
when set high enables the PLL to lock to an
incoming reference within approximately 500 ms.
MT9045 and Network Specifications
The
requirements
tolerance, jitter/wander transfer, frequency accuracy,
frequency holdover accuracy, capture range, phase
change
slope
and
MTIE
rearrangement) for the following specifications.
MT9045
fully
(intrinsic
meets
jitter/wander,
all
applicable
jitter/wander
PLL
during
reference
1.
Bellcore GR-1244-CORE June 1995 for Stratum
3, Stratum 4 Enhanced and Stratum 4
AT&T
TR62411
(DS1)
Stratum 3, Stratum 4 Enhanced and Stratum 4
ANSI T1.101 (DS1) February 1994 for Stratum 3,
Stratum 4 Enhanced and Stratum 4
ETSI 300 011 (E1) April 1992 for Single Access
and Multi Access
TBR 4 November 1995
TBR 12 December 1993
TBR 13 January 1996
ITU-T I.431 March 1993
ITU-T G.813 August 1996 for Option1 clocks for
2048 kbit/s interfaces
10. ITU-T G.812 June 1998 for type IV clocks for
1,544 kbit/s interfaces and 2,048 kbit/s interfaces
2.
December
1990
for
3.
4.
5.
6.
7.
8.
9.
Applications
This section contains MT9045 application specific
details
for
clock
and
operation, power supply decoupling, and control
operation.
crystal
operation,
reset
Master Clock
The MT9045 can use either a clock or crystal as the
master timing source.
In Freerun Mode, the frequency tolerance at the
clock outputs is identical to the frequency tolerance
of the source at the OSCi pin. For applications not
requiring an accurate Freerun Mode, tolerance of the
master
timing
source
may
applications requiring an accurate Freerun Mode,
such as AT&T TR62411, the tolerance of the master
timing source must be no greater than
±
32ppm.
be
±
100ppm.
For
Another consideration in determining the accuracy of
the master timing source is the desired capture
range. The sum of the accuracy of the master timing
source and the capture range of the MT9045 will
always equal 230ppm. For example, if the master
timing source is 100ppm, then the capture range will
be 130ppm.
Clock Oscillator
- when selecting a Clock Oscillator,
numerous parameters must be considered. This
includes absolute frequency, frequency change over
temperature, output rise and fall times, output levels
and duty cycle.
Figure 8 - Clock Oscillator Circuit
For applications requiring
±
32ppm clock accuracy,
the following clock oscillator module may be used.
FOX F7C-2E3-20.0MHz
Frequency:
Tolerance:
Rise & Fall Time:
Duty Cycle:
20MHz
25ppm 0C to 70C
10ns (0.33V 2.97V 15pF)
40% to 60%
+3.3V
20MHz OUT
GND
0.1uF
+3.3V
OSCo
MT9045
OSCi
No Connection
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參數(shù)描述
MT9045AN 制造商:Microsemi Corporation 功能描述:
MT9045AN1 制造商:Microsemi Corporation 功能描述:FRAMER E1/OC3/T1 3.3V 48SSOP - Rail/Tube 制造商:Microsemi Corporation 功能描述:T1/E1/OC3 SYSTEM SYNCHRONIZER
MT9045ANR1 制造商:Microsemi Corporation 功能描述:FRAMER E1/OC3/T1 3.3V 48SSOP - Tape and Reel 制造商:Microsemi Corporation 功能描述:iB FREE T1/E1/OC3 SYSTEM SYNCHRONIZER 制造商:Zarlink Semiconductor Inc 功能描述:FRAMER E1/OC3/T1 3.3V 48SSOP - Tape and Reel
MT9046 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL
MT9046AN 制造商:Microsemi Corporation 功能描述:
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