參數(shù)資料
型號(hào): MT9076AB
廠商: Mitel Networks Corporation
英文描述: T1/E1/J1 3.3V Single Chip Transceiver
中文描述: T1/E1/J1收發(fā)3.3V的單芯片收發(fā)器
文件頁數(shù): 21/160頁
文件大?。?/td> 416K
代理商: MT9076AB
Preliminary Information
MT9076
17
1.0
MT9076 Line Interface Unit (LIU)
1.1
Receiver
The receiver portion of the MT9076 LIU consists of an input signal peak detector, an optional equalizer with
separate high pass sections, a smoothing filter, data and clock slicers and a clock extractor. Receive
equalization gain can be set manually (i.e., software) or it can be determined automatically by peak detectors.
The output of the receive equalizer is conditioned by a smoothing filter and is passed on to the clock and data
slicer. The clock slicer output signal drives a phase locked loop, which generates an extracted clock (Exclk).
This extracted clock is used to sample the output of the data comparator.
In T1 mode, the receiver portion of the LIU can recover clock and data from the line signal for loop lengths of 0
- 6000 ft. and tolerate jitter to the maximum specified by AT&T TR 62411(Figure 3).
The LOS output pin function is selectable to indicate any combination of loss of signal and/or loss of basic
frame synchronization condition.
The LLOS (Loss of Signal) status bit indicates when the receive signal level is lower than the analog threshold
for at least 1 millisecond, or when the number of consecutive received zeros exceeds the digital loss threshold.
In E1 mode, the analog threshold is either of -20 dB or -40 dB. The digital loss threshold is either 32 or 192.
In T1 mode, the receive LIU circuit requires a terminating resistor of 17.4
across the device side of the
receive 2.4:1 transformer.
In E1 mode, the receive LIU circuit requires a terminating resistor of either 20.8
or 13
across the device side
of the receive 2.4:1 transformer.
The jitter tolerance of the clock extractor circuit exceeds the requirements of TR 62411 in T1 mode (see Figure
3) and G.823 in E1 mode (see Figure 4).
Figure 3 - Input Jitter Tolerance as Recommended by TR-62411 (T1)
138UI
100UI
0.4UI
1.0Hz
10Hz
1.0kHz 10kHz 100kHz
Jitter Frequency
(og scale)
Peak to Peak
Jitter Amplitude
(log scale)
28UI
1.0UI
10UI
0.1Hz
100Hz
4.9Hz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT9076AP 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:T1/E1/J1 3.3V Single Chip Transceiver
MT9076B 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:T1/E1/J1 3.3 V Single Chip Transceiver
MT9076BB 制造商:Zarlink Semiconductor Inc 功能描述:FRAMER E1/J1/T1 3.3V 80LQFP - Trays
MT9076BB1 制造商:Zarlink Semiconductor Inc 功能描述:FRAMER E1/J1/T1 3.3V 80LQFP - Trays
MT9076BP 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:T1/E1/J1 3.3 V Single Chip Transceiver