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參數(shù)資料
| 型號： | XRT73LC00AIV |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 33/61頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU STS1/DS3/E3 SGL 44TQFP |
| 標準包裝： | 160 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 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： | 44-LQFP |
| 供應商設備封裝： | 44-TQFP（10x10） |
| 包裝： | 托盤 |
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XRT73LC00A
36
REV. 1.0.2
E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73LC00A LIU IC is operating in the Training Mode. When the LIU is operating in the Training Mode it does
the following:
A. declares a Loss of Lock indication by toggling the RLOL output pin “High” and
B. outputs a clock signal via the RCLK1 and RCLK2 output pins which is derived from the signal applied to
the EXCLK input pin.
2. The Data/Clock Recovery Mode
If the frequency difference between the line signal and that applied via the EXCLK input pin is less than 0.5%,
the XRT73LC00A LIU IC is operating in the Data/Clock Recovery Mode. In this mode, the Clock Recovery PLL
is locked onto the line signal via the RTIP and RRING input pins.
3.5
The HDB3/B3ZS Decoder
The Remote Transmitting Terminal typically encodes the line signal into some sort of Zero Suppression Line
Code (e.g., HDB3 for E3 and B3ZS for DS3 and STS-1). The purpose of this encoding activity was to aid in the
Clock Recovery process of this data in the Near-End Receiving Terminal. Once the data has made it across
the E3, DS3 or STS-1 Transport Medium and has been recovered by the Clock Recovery PLL, it is now
necessary to restore the original content of the data. The purpose of the HDB3/B3ZS Decoding block is to
restore the data transmitted over the E3, DS3 or STS-1 line to its original content prior to Zero Suppression
encoding.
3.5.1
B3ZS Decoding DS3/STS-1 Applications
If the XRT73LC00A is configured to operate in the DS3 or STS-1 Modes, then the HDB3/B3ZS Decoding Block
performs B3ZS Decoding. When the Decoder is operating in this mode it parses through the incoming Dual-
Rail data and checks for the occurrence of either a “00V” or a “B0V” pattern. If the B3ZS Decoder detects this
particular pattern it substitutes these bits with a “000” pattern.
NOTE: If the B3ZS Decoder detects any bipolar violations that is not in accordance with the”B3ZS Line Code” format, or if
the B3ZS Decoder detects a string of 3 (or more) consecutive “0’s” in the incoming line signal, then the B3ZS
Decoder flags this event as a Line Code Violation by pulsing the LCV output pin “High”.
Figure 20 illustrates the B3ZS Decoder at work with two separate Zero Suppression patterns in the incoming
Dual-Rail Data Stream.
3.5.2
HDB3 Decoding E3 Applications
If the XRT73LC00A is configured to operate in the E3 Mode, the HDB3/B3ZS Decoding Block performs HDB3
Decoding. When the Decoder is operating in this mode it parses through the incoming Dual-Rail data and
checks for the occurrence of either a “000V” or a “B00V” pattern. If the HDB3 Decoder detects this particular
pattern, it substitutes these bits with a “0000” pattern.
Figure 21 illustrates the HDB3 Decoder at work with two separate Zero Suppression patterns in the incoming
Dual-Rail Data Stream.
FIGURE 20. AN EXAMPLE OF B3ZS DECODING
Data
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
RPOS
RNEG
0 0
V
Line Signal
B
0 V
RCLK
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73LC00AIV-F | 功能描述:外圍驅(qū)動器與原件 - PCI 1-Ch DS3, E3, SONET 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 |
| XRT73LC00AIVTR | 功能描述:網(wǎng)絡控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT73LC00AIVTR-F | 功能描述:網(wǎng)絡控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT73LC00IV | 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73LC03A | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
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