參數(shù)資料
型號(hào): XRT83L38IB-F
廠商: Exar Corporation
文件頁數(shù): 37/87頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 OCTAL 225BGA
標(biāo)準(zhǔn)包裝: 84
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)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
XRT83L38
39
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.2
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 19. 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 19. SIMPLIFIED BLOCK DIAGRAM - RECEIVE SECTION FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83L38
Rx
Line Interface Card
Prim ary Card
XRT83L38
Rx
Prim ary Card
XRT83L38
Rx
Ba ckup Card
XRT83L38
Rx
RxT SEL=1, Internal
RxTSEL=1, External
T1/E1 Line
1:1
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