REV. 1.0.7 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT 5.2.4 N+1 Redundancy Using External Relays N+1 redundancy has one bac" />
參數(shù)資料
型號： XRT83SH38IB
廠商： Exar Corporation
文件頁數(shù)： 36/78頁
文件大?。?/td> 0K
描述： IC LIU SH T1/E1/J1 8CH 225BGA
標準包裝： 84
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 8/8
規(guī)程： T1，E1，J1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 225-BGA
供應(yīng)商設(shè)備封裝： 225-BGA（19x19）
包裝： 托盤
XRT83SH38
38
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
5.2.4
N+1 Redundancy Using External Relays
N+1 redundancy has one backup card for N primary cards.
Due to impedance mismatch and signal
contention, external relays are necessary when using this redundancy scheme. The relays create complete
isolation between the primary cards and the backup card. This allows all transmitters and receivers on the
primary cards to be configured in internal impedance, providing one bill of materials for all interface modes of
operation. The transmit and receive sections of the LIU device are described separately.
5.2.5
Transmit Interface with N+1 Redundancy
For N+1 redundancy, the transmitters on all cards should be programmed for internal impedance. The
transmitters on the backup card do not have to be tri-stated. To swap the primary card, close the desired
relays, and tri-state the transmitters on the failed primary card. A 0.68uF capacitor is used in series with TTIP
for blocking DC bias. See Figure 29 for a simplified block diagram of the transmit section for an N+1
redundancy scheme.
FIGURE 29. SIMPLIFIED BLOCK DIAGRAM OF THE TRANSMIT INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83SH38
Tx
Line Interface Card
0.68uF
T1/E1 Line
0.68uF
Primary Card
Tx
0.68uF
Primary Card
Tx
0.68uF
Backup Card
Tx
T1/E1 Line
Internal
Impedence
1:2
XRT83SH38
Internal
Impedence
Internal
Impedence
Internal
Impedence
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT83SH38IB-F 功能描述:外圍驅(qū)動器與原件 - PCI 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
XRT83SL216 制造商:EXAR 制造商全稱:EXAR 功能描述:16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SL216_06 制造商:EXAR 制造商全稱:EXAR 功能描述:16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SL216ES 功能描述:外圍驅(qū)動器與原件 - PCI 16 CH E1 LIU SH 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
XRT83SL216IB 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59
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