參數(shù)資料
型號: XRT83SL38IB
廠商: Exar Corporation
文件頁數(shù): 33/88頁
文件大?。?/td> 0K
描述: IC LIU SH T1/E1/J1 OCTAL 225BGA
標準包裝: 84
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: 225-BGA
供應(yīng)商設(shè)備封裝: 225-BGA(19x19)
包裝: 托盤
XRT83SL38
37
REV. 1.0.2
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
RECEIVE 1:1 & 1+1 REDUNDANCY
For 1:1 and 1+1 redundancy, the receivers on the primary card should be programmed for Internal Impedance
mode. The receivers on the backup card should be programmed for External Impedance mode. Since there is
no external resistor in the circuit, the receivers on the backup card will be high impedance. 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, T1/E1/J1. To swap the primary card, set the backup
card to Internal Impedance mode, then the primary card to External Impedance mode. See Figure 14 for a
simplified block diagram of the receive section for a 1:1 and 1+1 redundancy scheme.
NOTE: For simplification, the over voltage protection circuitry was omitted.
N+1 REDUNDANCY
FIGURE 13. SIMPLIFIED BLOCK DIAGRAM OF THE TRANSMIT SECTION FOR 1:1 & 1+1 REDUNDANCY
FIGURE 14. SIMPLIFIED BLOCK DIAGRAM - RECEIVE SECTION FOR 1:1 AND 1+1 REDUNDANCY
T1/E1 Line
Backplane Interface
Primary Card
Backup Card
XRT83SL38
Tx
Line Interface Ca rd
0.68
μ F
0.68
μ F
TxTS EL=1, Internal
1:2 or 1:2.45
RxT SEL=0, External
RxT SE L=1, Internal
Backplane Interface
Primary Card
B ackup Card
XRT 83SL38
Rx
Line Interface Card
T1/E1 Line
Rx
1:1
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