参数资料
型号: XRT83VSH28IB
厂商: Exar Corporation
文件页数: 33/75页
文件大小: 0K
描述: IC LIU SH E1 OCTAL 225BGA
标准包装: 84
类型: 线路接口装置(LIU)
驱动器/接收器数: 8/8
规程: T1,E1,J1
电源电压: 3.14 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 225-BGA
供应商设备封装: 225-BGA(19x19)
包装: 托盘
XRT83VSH28
36
REV. 2.0.0
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
4.2.4
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.
4.2.5
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 25 for a simplified block diagram of the transmit section for an N+1
redundancy scheme.
FIGURE 25. SIMPLIFIED BLOCK DIAGRAM OF THE TRANSMIT INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83VSH28
Tx
Line Interface Card
0.68uF
E1 Line
0.68uF
Primary Card
Tx
0.68uF
Primary Card
Tx
0.68uF
Backup Card
Tx
E1 Line
Internal
Impedence
1:2
XRT83VSH28
Internal
Impedence
Internal
Impedence
Internal
Impedence
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XRT83VSH28IB-F 功能描述:外围驱动器与原件 - PCI 8 Channel 1.8V-3.3V temp -45 to 85C RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray
XRT83VSH28IB-F 制造商:Exar Corporation 功能描述:T1/E1 LIU IC
XRT83VSH314 制造商:EXAR 制造商全称:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH314ES 功能描述:外围驱动器与原件 - PCI 14 CHT1/E1LIUSH LOW COST VERSION RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray
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