参数资料
型号: XRT83SL38IB-F
厂商: Exar Corporation
文件页数: 33/88页
文件大小: 0K
描述: IC LIU SH T1/E1/J1 OCTAL 225BGA
标准包装: 84
类型: 线路接口装置(LIU)
驱动器/接收器数: 8/8
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: 225-BGA
供应商设备封装: 225-BGA(19x19)
包装: 托盘
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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