REV. 1.0.0 28 3.2.5 Transmit Interface with N+1 Redundancy For N+1 redundancy, the tra" />
參數(shù)資料
型號: XRT83SL28IV-F
廠商: Exar Corporation
文件頁數(shù): 24/47頁
文件大小: 0K
描述: IC LIU SH E1 8CH 144TQFP
標準包裝: 60
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: 144-LQFP
供應商設備封裝: 144-TQFP(20x20)
包裝: 托盤
XRT83SL28
xr
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
28
3.2.5
Transmit Interface with N+1 Redundancy
For N+1 redundancy, the transmitters on all cards can 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. A 0.68uF capacitor is used in series with TTIP for blocking DC bias. See Figure 23 for a simplified
block diagram of the transmit section for an N+1 redundancy scheme.
FIGURE 23. SIMPLIFIED BLOCK DIAGRAM OF THE TRANSMIT INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83SL28
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 Impedance
1:2
XRT83SL28
Internal Impedance
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