參數(shù)資料
型號: XRT75L03IVTR-F
廠商: Exar Corporation
文件頁數(shù): 44/92頁
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
46
5.2
Clock and Data Recovery:
The Clock and Data Recovery Circuit extracts the embedded clock, RxClk_n from the sliced digital data stream
and provides the retimed data to the B3ZS (HDB3) decoder.
The Clock Recovery PLL can be in one of the following two modes:
TRAINING MODE:
In the absence of input signals at RTIP_n and RRing_n pins, or when the frequency difference between the
recovered line clock signal and the reference clock applied on the ExClk_n input pins exceed 0.5%, a Loss of
Lock condition is declared by toggling RLOL_n output pin “High” (in Hardware Mode) or setting the RLOL_n bit
to “1” in the control registers (in Host Mode). Also, the clock output on the RxClk_n pins are the same as the
reference clock channel.
FIGURE 18. INTERFERENCE MARGIN TEST SET UP FOR E3.
TABLE 9: INTERFERENCE MARGIN TEST RESULTS
MODE
CABLE LENGTH (ATTENUATION)INTERFERENCE TOLERANCE
E3
0 dB
Equalizer “IN”
-17 dB
12 dB
-14 dB
DS3
0 feet
-15 dB
225 feet
-15 dB
450 feet
-14 dB
STS-1
0 feet
-15 dB
225 feet
-14 dB
450 feet
-14 dB
Attenuator 1
N
S
Sine Wave
Generator
17.184mHz
Signal Source
223-1 PRBS
Attenuator 2
Test
Equipment
DUT
(XRT75L03)
Cable Simulator
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