參數(shù)資料
型號(hào)： XRT5997
廠商： Exar Corporation
英文描述： Seven-Channel E1 Line Interface Unit(7通道 E1線接口單元)
中文描述： 七通道E1線路接口單元（7通道素E1線接口單元）
文件頁(yè)數(shù)： 29/37頁(yè)
文件大小： 367K
代理商： XRT5997
XRT5997
29
Rev. 1.0.0
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
Figure 11. The Behavior of the LOS Output Indicator, in response to
the Loss of Signal, and the Restoration of the Signal
2.3 The “Receive Output Interface” block
The purpose of the “Receive Output Interface” block is
to interface directly with the “Receiving Terminal Equip-
ment”. The “Receive Output Interface” block outputs
the data (which has been recovered from the incoming
line signal) to the “Receive Terminal Equipment” via the
“RxPOS_x and RxNEG_x output pins.
If the “Receive Sections” of the XRT5997 device has
received a “Positive-Polarity” pulse, via the RTIP_x
and RRing_x input pins, then the Receive Output
Interface will output a pulse via the “RxPOS_x” output
pins.
Similarly, if the “Receive Sections” of the XRT5997
device has received a “Negative-Polarity” pulse, via the
RTIP_x and RRing_x input pins, then the Receive
Output Interface will output a pulse via the “RxNEG_x”
output pins.
Note:
The “Receive Output Interface” block does not
supply a recovered clock. This device is intended to be
used in those applications, where the “Clock Recovery”
circuit is realized in an ASIC solution.
3.0 Shutting off the Transmitter
Each channel (within the XRT5997 device) permits the
user to shut off the “Transmit Driver” within their
respective “Transmit Section”. This feature can come
in handy for system redundancy design considerations
or during diagnostic testing. The user can activate this
feature by either of the following ways.
Method 1:
Connect the Transmit Data input pins (e.g., TxPOS_x
and TxNEG_x) to a logic “1”; or allow them to float.
(These input pins have an internal “pull-up” resistor).
Method 2:
Connect the “TxClk_x” input pin to a logic “0” (e.g.,
GND) and continue to apply data via the TxPOS_x and
TxNEG_x input pins.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT5997ES 功能描述:其他開(kāi)發(fā)工具 Eval Board for XRT5997 Series RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類(lèi)型:Robotics 工具用于評(píng)估:ELEV-8 Quadcopter 工作電源電壓:
XRT5997IV 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver
XRT5997IV-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 3.3V or 5V 7-ch 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
XRT5997IVTR-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 7 Ch. E1 LIU 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
XRT59L81IG-F 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 BITS Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
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