ITU-T G" />
參數(shù)資料
型號: XRT82D20IW
廠商: Exar Corporation
文件頁數(shù): 8/27頁
文件大?。?/td> 0K
描述: IC LIU EI SGL 28SOJ
標(biāo)準(zhǔn)包裝: 27
類型: 線路接口裝置(LIU)
驅(qū)動器/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: 管件
XRT82D20
15
SINGLE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.0.8
1.4
Interfacing the Transmit Section of the XRT82D20 to the Line
ITU-T G.703 specifies that the E1 line signal can be transmitted over coaxial cable and terminated with 75 or
transmitted over twisted-pair and terminated with 120.
In both applications (e.g., 75 or 120, the user is advised to interface the Transmitter to the Line, in the
manner as depicted in Figure 10 and Figure 11, respectively.
FIGURE 10. ILLUSTRATION OF HOW TO INTERFACE THE XRT82D20 TO THE LINE FOR 75 OHM APPLICATIONS AND
3.3V OPERATION ONLY
R Load
75
270
270
9.1
9.1
1 : 2
2 : 1
RTIP
RRING
TTIP
TRING
+3.3 V
0.1
F
TVDD
AVDD
TxLEV
TNEG/CODE
TPOS/TData
TClk
RPOS/RData
RNEG/LCV
RClk
AGND
TGND
10
F
Rxx Input
Tx Output
75
Coax
75
Coax
75
Signal
Source
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