參數資料
型號: XRT83SL38IB
廠商: Exar Corporation
文件頁數: 36/88頁
文件大小: 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)
驅動器/接收器數: 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
供應商設備封裝: 225-BGA(19x19)
包裝: 托盤
XRT83SL38
39
REV. 1.0.2
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
RECEIVE
For N+1 redundancy, the receivers on the primary cards 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. 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 16. for a simplified block
diagram of the receive section for a N+1 redundancy scheme.
NOTE: For simplification, the over voltage protection circuitry was omitted.
FIGURE 16. SIMPLIFIED BLOCK DIAGRAM - RECEIVE SECTION FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83SL38
Rx
Line Interface Card
Prim ary Card
XRT83SL38
Rx
Prim ary Card
XRT83SL38
Rx
Ba ckup Card
XRT83SL38
Rx
RxT SEL=1, Internal
RxTSEL=1, External
T1/E1 Line
1:1
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