參數(shù)資料
型號: XRT83VSH314IB
廠商: Exar Corporation
文件頁數(shù): 33/80頁
文件大?。?/td> 0K
描述: IC LIU SH T1/E1/J1 14CH 304TBGA
標(biāo)準(zhǔn)包裝: 27
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 14/14
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: 304-BBGA
供應(yīng)商設(shè)備封裝: 304-PBGA(31x31)
包裝: 托盤
XRT83VSH314
36
REV. 1.0.1
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
5.3.5
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 27 for a simplified block diagram of the transmit section for an N+1
redundancy scheme.
FIGURE 27. SIMPLIFIED BLOCK DIAGRAM OF THE TRANSMIT INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83VSH314
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
XRT83VSH314
Internal
Impedence
Internal
Impedence
Internal
Impedence
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