參數(shù)資料
型號: XRT75L02
廠商: Exar Corporation
英文描述: TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
中文描述: 雙通道E3/DS3/STS-1線路接口單元,其抖動
文件頁數(shù): 32/50頁
文件大小: 343K
代理商: XRT75L02
xr
REV. 1.0.3
XRT75L02
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
30
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.
5.4.3
When the LOS condition is declared, the clock recovery circuit locks into the reference clock applied to the E3/
DS3/STS1CLK pin and output this clock on the RxClk_n output. In Single Frequency Mode (SFM), the clock
recovery locks into the rate clock generated and output this clock on the RxClk_n pins. The data on the
RPOS_n and RNEG_n pins can be forced to zero by pulling the LOSMUT pin “High” (in Hardware Mode) or by
setting the LOSMUT_n bits in the individual channel control register to “1” (in Host Mode).
Muting the Recovered Data with LOS condition:
N
OTE
:
When the LOS condition is cleared, the recovered data is output on RPOS_n and RNEG_n pins.
F
IGURE
19. L
OSS
O
F
S
IGNAL
D
EFINITION
FOR
E3
AS
PER
ITU-T G.775
F
IGURE
20. L
OSS
OF
S
IGNAL
D
EFINITION
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
255 UI
RTIP/
RRing
RLOS Output Pin
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XRT75L02ES 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75L02IV 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER