REV. 1.2.1 TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT P.O. Box 5826 Redwood City, CA 94063 Tel: (650)568-5800 FAX: (650)568-6161 2." />
參數(shù)資料
型號： XRT59L921IB
廠商： Exar Corporation
文件頁數(shù)： 16/32頁
文件大?。?/td> 0K
描述： IC LIU E1 21CH 316STBGA
標(biāo)準(zhǔn)包裝： 60
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 21/21
規(guī)程： E1
電源電壓： 3.13 V ~ 3.46 V
安裝類型： 表面貼裝
封裝/外殼： 316-LBGA
供應(yīng)商設(shè)備封裝： 316-STBGA（21x21）
包裝： 托盤
XRT59L921
21
REV. 1.2.1
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
P.O. Box 5826
Redwood City, CA 94063
Tel: (650)568-5800
FAX: (650)568-6161
2.0 THE RECEIVE SECTION
The Receive Sections of the XRT59L921 consists of the following blocks:
The Receive Equalizer block
The Peak Detector and Slicer block
The LOS Detector block
The Receive Output Interface block
2.1
Interfacing the Receive Sections to the Line (Transformer Coupling)
The design of each channel (within the XRT59L921) permits the user to transformer-couple the Receive
Section to the line. Additionally, as mentioned earlier, the specification documents for E1 specify 75
termination loads, when transmitting over coaxial cable, and 120
loads, when transmitting over twisted-pair.
Figure 9, and Figure 10 present the two methods that the user can employ in order to interface the Receivers
(of the XRT59L921) to the line.
FIGURE 9. RECOMMENDED SCHEMATIC FOR INTERFACING THE RECEIVE SECTIONS OF THE XRT59L921 TO THE
LINE FOR 75
APPLICATIONS (TRANSFORMER-COUPLING)
75
RxPOS_n
RxNEG_n
LOS_n
XRT59L921
LOS_n
RxPOS_n
RxNEG_n
RTIP_n
RRING_n
1:1
Coaxial cable
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