参数资料
型号: XRT83L314IB-L
厂商: Exar Corporation
文件页数: 37/84页
文件大小: 0K
描述: IC LIU T1/E1/J1 14CH 304TBGA
标准包装: 27
类型: 线路接口装置(LIU)
驱动器/接收器数: 14/14
规程: T1,E1,J1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 304-LBGA
供应商设备封装: 304-TBGA(31x31)
包装: 托盘
XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
38
card to internal impedance, then the primary card to "High" impedance. See Figure 37. for a simplified block
diagram of the receive section for a 1:1 redundancy scheme.
FIGURE 37. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR 1:1 AND 1+1 REDUNDANCY
4.3.4
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.
"High" Impedence
Internal Impedence
Backplane Interface
Primary Card
Backup Card
XRT83L314
Rx
T1/E1 Line
Rx
1:1
XRT83L314
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