參數(shù)資料
型號(hào): XRT83VSH28IB
廠商: Exar Corporation
文件頁數(shù): 32/75頁
文件大小: 0K
描述: IC LIU SH E1 OCTAL 225BGA
標(biāo)準(zhǔn)包裝: 84
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 8/8
規(guī)程: T1,E1,J1
電源電壓: 3.14 V ~ 3.47 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
XRT83VSH28
35
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. 2.0.0
4.2.3
Receive Interface with 1:1 and 1+1 Redundancy
The receivers on the backup card should be programmed for "High" impedance. Since there is no external
resistor in the circuit, the receivers on the backup card will not load down the line interface. This key design
feature eliminates the need for relays and provides one bill of materials for all interface modes of operation.
Select the impedance for the desired mode of operation. To swap the primary card, set the backup card to
internal impedance, then the primary card to "High" impedance. See Figure 24. for a simplified block diagram
of the receive section for a 1:1 redundancy scheme.
FIGURE 24. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR 1:1 AND 1+1 REDUNDANCY
"High" Impedence
Internal Impedence
Backplane Interface
Primary Card
Backup Card
XRT83VSH28
Rx
E1 Line
Rx
1:1
XRT83VSH28
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