參數(shù)資料
型號: XRT83L34IV-F
廠商: Exar Corporation
文件頁數(shù): 41/99頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 QUAD 128TQFP
標準包裝: 72
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 4/4
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: 128-LQFP
供應商設備封裝: 128-TQFP(14x20)
包裝: 托盤
其它名稱: XRT83L34IV-F-ND
XRT83L34
xr
REV. 1.0.1
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
43
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
B ackp lane Interface
P rim ary C ard
X R T 83L34
Rx
Line Interface C ard
P rim ary C ard
X R T 83L34
Rx
P rim ary C ard
X R T 83L34
Rx
B a ckup C ard
X R T 83L34
Rx
R xT S E L=1, Internal
R xT S EL=1, External
T 1/E 1 Line
1:1
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