參數(shù)資料
型號(hào): XRT75L03IVTR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 47/92頁(yè)
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 3CH 128LQFP
標(biāo)準(zhǔn)包裝: 750
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 3/3
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 128-LQFP(14x20)
包裝: 帶卷 (TR)
XRT75L03
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.4
48
As defined in ITU-T G.775, an LOS condition is also declared between 10 and 255 UI (or E3 bit periods) after
the actual time the LOS condition has occurred. The LOS condition is cleared within 10 to 255 UI after
restoration of the incoming line signal. Figure 20 shows the LOS declaration and clearance conditions.
FIGURE 19. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775
FIGURE 20. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775.
0 dB
-12 dB
-15dB
-35dB
Maximum Cable Loss for E3
LOS Signal Must be Declared
LOS Signal Must be Cleared
LOS Signal may be Cleared or Declared
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
RTIP/
RRing
RLOS Output Pin
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