參數(shù)資料
型號(hào)： MT90401AB
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 數(shù)字傳輸電路
英文描述： 150MA LOW-DROPOUT VOLTAGE REGULATOR SO-8 PKG
中文描述： ATM/SONET/SDH SUPPORT CIRCUIT, PQFP80
封裝： 14 X 14 MM, 1.40 MM HEIGHT, MS-026BEC, LQFP-80
文件頁(yè)數(shù)： 14/38頁(yè)
文件大?。?/td> 650K
代理商： MT90401AB
MT90401
Data Sheet
14
Zarlink Semiconductor Inc.
Figure 5 - Output Interface Circuit Block Diagram
The T1 and E1 signals are generated from a common DPLL signal. Consequently, all frame pulses and clock
outputs are locked to one another for all operating states, and are also locked to the selected input reference in
Normal Mode. See Figure 18.
All frame pulses and clock outputs have limited driving capability, and should be buffered when driving capacitive
loads exceeding 30 pF.
1.6 Input Impairment Monitor
This circuit monitors the input signal to the DPLL and automatically enables the Auto-Holdover when the frequency
of the incoming signal is outside the Auto-Holdover capture range. (See Performance Characteristics - Mode
Switching). This includes a complete loss of incoming signal, or a large frequency shift in the incoming signal. When
the incoming signal returns to normal, the DPLL is returned to Normal Mode with the output signal locked to the
input signal. The holdover output signal in the MT90401 is based on the incoming signal 30 ms (minimum) to 60 ms
prior to entering the Holdover Mode. The amount of phase drift while in holdover is negligible because the Holdover
Mode is very accurate (i.e., 0.02 ppm). Consequently, the phase delay between the input and output after switching
back to Normal Mode is preserved.
Tapped
Delay
Line
From
DPLL
T1 Divider
E1 Divider
16MHz
12MHz
C1.5o
C2o
C4o
C8o
C16o
F0o
F8o
F16o
Tapped
Delay
Line
Tapped
Delay
Line
x4 / x8 PLL
12MHz
19MHz
C155P/N
C19o
DS2 Divider
C6o
Tapped
Delay
Line
C34/C44
8.5/11.2MHz
Tapped
Delay
Line
相關(guān)PDF資料
PDF描述
MT90401AB1 SONET/SDH System Synchronizer
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT90401AB1 制造商:Microsemi Corporation 功能描述:FRAMER SDH/SONET 3.3V 80LQFP EP - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER SONET/SDH 80LQFP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER SONET/SDH 80LQFP
MT9040AN 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:T1/E1 Synchronizer
MT9040AN1 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Rail/Tube
MT9040ANR1 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Tape and Reel
MT9041 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Multiple Output Trunk PLL
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