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參數(shù)資料
| 型號： | MT9041B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | T1/E1 System Synchronizer(T1/E1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的系統(tǒng)同步（T1/E1的系統(tǒng)同步裝置（由一個(gè)數(shù)字鎖相環(huán)組成）） |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 87K |
| 代理商： | MT9041B |
MT9041B
5
All frame pulse and clock outputs have limited driving
capability, and should be buffered when driving high
capacitance (e.g. 30pF) loads.
Master Clock
The MT9041B can use either a clock or crystal as
the master timing source. For recommended master
timing circuits, see the Applications - Master Clock
section.
Control and Modes of Operation
The MT9041B can operate either in Normal or
Freerun modes.
As shown in Table 2, pin MS selects between
NORMAL and FREERUN modes.
Normal Mode
Normal Mode is typically used when a slave clock
source synchronized to the network is required.
In Normal Mode, the MT9041B provides timing
(C1.5o, C2o, C3o, C4o, C8o and C16o) and frame
synchronization (F0o, F8o, F16o) signals, which are
synchronized to reference input (REF). The input
reference signal may have a nominal frequency of
8kHz, 1.544MHz or 2.048MHz.
From a reset condition, the MT9041B will take up to
25 seconds for the output signal to be phase locked
to the reference.
The reference frequencies are selected by the
frequency control pins FS2 and FS1 as shown in
Table 1.
Freerun Mode
Freerun Mode is typically used when a master clock
source is required, or immediately following system
power-up
before
network
achieved.
synchronization
is
In Freerun Mode, the MT9041B provides timing and
synchronization signals which are based on the
master clock frequency (OSCi) only, and are not
synchronized to the reference signal (REF).
The accuracy of the output clock is equal to the
accuracy of the master clock (OSCi). So if a
±
32ppm
output clock is required, the master clock must also
be
±
32ppm. See Applications - Crystal and Clock
Oscillator sections.
MT9041B Measures of Performance
The following are some synchronizer performance
indicators and their corresponding definitions.
Intrinsic Jitter
Intrinsic
synchronizing circuit and is measured at its output. It
is measured by applying a reference signal with no
jitter to the input of the device, and measuring its
output jitter. Intrinsic jitter may also be measured
when the device is in a non-synchronizing mode, i.e.
free running mode, by measuring the output jitter of
the device. Intrinsic jitter is usually measured with
various
bandlimiting
filters
applicable standards.
jitter
is
the
jitter
produced
by
the
depending
on
the
Jitter Tolerance
Jitter tolerance is a measure of the ability of a PLL to
operate properly (i.e., remain in lock and or regain
lock), in the presence of large jitter magnitudes at
various jitter frequencies applied to its reference.
The applied jitter magnitude and jitter frequency
depends on the applicable standards.
Jitter Transfer
Jitter transfer or jitter attenuation refers to the
magnitude of jitter at the output of a device for a
given amount of jitter at the input of the device. Input
jitter
is
applied
at
various
frequencies, and output jitter is measured with
various
filters
depending
standards.
amplitudes
and
on
the
applicable
MS
Description of Operation
0
NORMAL
1
FREERUN
Table 2 - Operating Modes
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PDF描述 |
|---|---|
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| MT9044 | 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）) |
| MT90500 | Multi-Channel ATM AAL1 SAR(多通道 ATM AAL1分段及重組設(shè)備（基于通訊總線的系統(tǒng)與ATM網(wǎng)絡(luò)的接口）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9041BP | 制造商:Microsemi Corporation 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述:PCM, OTHER/SPECIAL/MISCELLANEOUS, 28 Pin, Plastic, PLCC |
| MT9041BP1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 5V 28PLCC - Rail/Tube 制造商:Microsemi Corporation 功能描述:PB FREE MULTIPLE OUTPUT TRUNK PLL 制造商:Zarlink Semiconductor Inc 功能描述:FRAMER E1 /T1 5V 28PLCC - Rail/Tube 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE MULTIPLE OUTPUT TRUNK PLL |
| MT9041BPR | 制造商:Microsemi Corporation 功能描述:SPECIALTY TELECOM CIRCUIT, 28 Pin Plastic PLCC |
| MT9041BPR1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 5V 28PLCC - Tape and Reel 制造商:Zarlink Semiconductor Inc 功能描述:FRAMER E1 /T1 5V 28PLCC - Tape and Reel |
| MT9042 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Global Digital Trunk Synchronizer |
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