參數(shù)資料
型號(hào)： XRT59L91
廠商： Exar Corporation
英文描述： Single-Chip E1 Line Interface Unit(單片E1 線接口單元)
中文描述： 單芯片E1線路接口單元（單片素E1線接口單元）
文件頁(yè)數(shù)： 17/28頁(yè)
文件大?。?/td> 292K
代理商： XRT59L91
XRT59L91
17
Rev. P2.00
Preliminary
Timing Requirements associated with Declaring
and Clearing the LOS Indicator.
The XRT59L91 device was designed to meet the ITU-
T G.775 specification timing requirements for declar-
ing and clearing the LOS indicator. In particular, the
XRT59L91 device will declare LOS, between 10 and 255
UI (or E1 bit-periods) after the actual time the LOS
condition occurred. Further, the XRT59L91 device will
Actual
Occurrence
of LOS
Condition
Line
Signal
is
Restored
Time Range
for
LOS
Declaration
Time Range
for
LOS
Clearance
G.775 Compliance
G.775 Compliance
0
UI
10 UI
0
UI
10 UI
255 UI
255 UI
RXIN
LOS Output Pin
Note:
For E1, 1 UI = 488ns
clear the LOS indicator within 10 to 255 UI after
restoration of the incoming line signal. Figure 11
illustrates the LOS Declaration and Clearance behav-
ior, in response to first, the “Loss of Signal” event and
then afterwards, the restoration of the signal.
Figure 11. The Behavior of the LOS Output Indicator, in response to the Loss of Signal,
and the Restoration of the Signal
2.5
The “Receive Output Interface” Block
The purpose of the “Receive Output Interface” block is
to interface directly with the “Receiving Terminal
Equipment”. The “Receive Output Interface” block
outputs the data (which has been recovered from the
incoming line signal) to the “Receive Terminal Equip-
ment” via the “RxPOS and RxNEG output pins.
If the “Receive Section” of the XRT59L91 device has
received a “Positive-Polarity” pulse, via the RTIP and
RRing input pins, then the Receive Output Interface will
output a pulse at the “RxPOS” output pin.
Similarly, if the “Receive Section” of the XRT59L91
device has received a “Negative-Polarity” pulse, via
the RTIP and RRing input pins, then the Receive Output
Interface will output a pulse at the “RxNEG” output pin.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT59L91ES 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 1 CH E1 AFE RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT59L91ID 制造商:Exar Corporation 功能描述:
XRT59L91ID-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 3.3V or 5V Sngl E1 temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT59L91IDTR-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI SNGLCHANNELE1LIU RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT59L921 制造商:EXAR 制造商全稱:EXAR 功能描述:TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
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