參數(shù)資料
型號: XRT75R06DIB-F
廠商: Exar Corporation
文件頁數(shù): 32/105頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
標準包裝: 126
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 6/6
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: 217-BBGA
供應商設備封裝: 217-BGA(23x23)
包裝: 托盤
XRT75R06D
á
REV. 1.0.0
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
27
4.2
Transmit Clock
The Transmit Clock applied via TxClk_n pins, for the selected data rate (for E3 = 34.368 MHz, DS3 = 44.736
MHz or STS-1 = 51.84 MHz), is duty cycle corrected by the internal PLL circuit to provide a 50% duty cycle
clock to the pulse shaping circuit. This allows a 30% to 70% duty cycle Transmit Clock to be supplied.
4.3
B3ZS/HDB3 ENCODER
When the Single-Rail (NRZ) data format is selected, the Encoder Block encodes the data into either B3ZS
format (for either DS3 or STS-1) or HDB3 format (for E3).
4.3.1
B3ZS Encoding
An example of B3ZS encoding is shown in Figure 19. 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 a DC component into the line signal.
4.3.2
HDB3 Encoding
An example of the HDB3 encoding is shown in Figure 20. 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 pulses exist between any consecutive V pulses.
This avoids the introduction of DC component into the analog signal.
FIGURE 18. DUAL-RAIL DATA FORMAT (ENCODER AND DECODER ARE DISABLED)
FIGURE 19. B3ZS ENCODING FORMAT
TxClk
TPData
TNData
Data
1
0
00
0
1
V
B
V
1
0
00
0
00
0
V
BV
0
00
TClk
Line
Signal
TPDATA
相關PDF資料
PDF描述
XRT75R06IB-F IC LIU E3/DS3/STS-1 6CH 217BGA
XRT75R12DIB-L IC LIU E3/DS3/STS-1 12CH 420TBGA
XRT75R12IB-L IC LIU E3/DS3/STS-1 12CH 420TBGA
XRT75VL00DIV IC LIU E3/DS3/STS-1 1CH 52TQFP
XRT75VL00IV-F IC LIU E3/DS3/STS-1 1CH 52TQFP
相關代理商/技術參數(shù)
參數(shù)描述
XRT75R06ES 功能描述:時鐘合成器/抖動清除器 6CH T3/E3/STS1LIU+JA 3.3V W/REDUNDANCY 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
XRT75R06IB 功能描述:外圍驅動器與原件 - PCI 6CH E3/DS3/STS1 LIU+Jitter Attenuato RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT75R06IB208 制造商:Exar Corporation 功能描述:Line Interface Unit 51.84Mbps DS3/E3/STS-1 Parallel 217-Pin BGA
XRT75R06IB-F 功能描述:外圍驅動器與原件 - PCI 6 Channel 3.3V-5V temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT75R12 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER