參數(shù)資料
型號(hào): XRT82D20IWTR
廠商: Exar Corporation
文件頁(yè)數(shù): 10/27頁(yè)
文件大?。?/td> 0K
描述: IC LIU EI SGL 28SOJ
標(biāo)準(zhǔn)包裝: 1,000
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: E1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 28-BSOJ
供應(yīng)商設(shè)備封裝: 28-SOJ
包裝: 帶卷 (TR)
XRT82D20
17
SINGLE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.0.8
1.5
Interfacing the Receive Section to the Line
The design of the XRT82D20 permits the user to transformer-couple the Receive Section to the line. As
mentioned earlier, the specifications for E1 require 75
termination loads, when transmitting over coaxial
cable, and 120
loads, when transmitting over twisted-pair. Figure 12 and Figure 13 present the various
methods that the user can employ to interface the Receiver of the XRT82D20 to the line.
FIGURE 12. RECOMMENDED SCHEMATIC FOR TRANSFORMER-COUPLING THE XRT82D20 TO THE LINE FOR 75 OHM
APPLICATIONS AND 5 V OPERATION ONLY
270
270
15.4
15.4
1 : 2
1.36 : 1
RTIP
RRING
TTIP
TRING
+5 V
0.11
F
TVDD
AVDD
TxLEV
TNEG/CODE
TPOS/TData
TClk
RPOS/RData
RNEG/LCV
RClk
AGND
TGND
10
F
R Load
75
75
Coax
75
Coax
75
Signal
Source
Rx Input
Tx Output
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