参数资料
型号: XRT75L00DIV-F
厂商: Exar Corporation
文件页数: 24/92页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 SGL 52TQFP
标准包装: 96
类型: 线路接口装置(LIU)
驱动器/接收器数: 1/1
规程: DS3,E3,STS-1,SONET
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 52-LQFP
供应商设备封装: 52-TQFP(10x10)
包装: 托盘
XRT75L00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.2
25
An example of B3ZS encoding is shown in Figure 14. If the encoder detects an occurrence of three
consecutive zeros in the data stream, it is replaced with either B0V or 00V, where ‘B’ refers to Bipolar pulse
that is compliant with the Alternating polarity requirement of the AMI (Alternate Mark Inversion) line code and
‘V’ refers to a Bipolar Violation (e.g., a bipolar pulse that violates the AMI line code). The substitution of B0V or
00V is made so that an odd number of bipolar pulses exist between any two consecutive violation (V) pulses.
This avoids the introduction of DC component into the line signal.
4.2.2
HDB3 Encoding:
An example of the HDB3 encoding is shown in Figure 15.If the HDB3 encoder detects an occurrence of four
consecutive zeros in the data stream, then the four zeros are substituted with either 000V or B00V pattern. The
substitution code is made in such a way that an odd number of bipolar (B) pulses exist between any
consecutive V pulses. This avoids the introduction of DC component into the analog signal.
FIGURE 14. B3ZS ENCODING FORMAT
FIGURE 15. HDB3 ENCODING FORMAT
00
0
1
V
B
V
1
0
00
0
00
0
V
BV
0
00
TClk
Line
Signal
TPDATA
0
00
0
1
V
B
V
1
0
00
0
00
V
0
00
TClk
Line
Signal
TPDATA
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XRT75L00IV-F IC LIU E3/DS3/STS-1 SGL 52TQFP
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