參數(shù)資料
型號: XRT73L04BIV-F
廠商: Exar Corporation
文件頁數(shù): 33/64頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 4CH 144LQFP
標準包裝: 60
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 4/4
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
XRT73L04B
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
35
3.0
THE RECEIVE SECTION
Figure 13 indicates the Receive Section consists of
the following blocks:
AGC/Equalizer
Peak Detector
Slicer
Clock Recovery PLL
Data Recovery
HDB3/B3ZS Decoder
The purpose of the Receive Section is to take an in-
coming attenuated/distorted bipolar signal from the
line and encode it back into the TTL/CMOS format
where it can be received and processed by the Termi-
nal Equipment.
3.1
INTERFACING THE RECEIVE SECTIONS OF THE
XRT73L04B TO THE LINE
The design of the Receive Circuitry should be trans-
former-coupled to the Receive Section to the line.
The specification documents for E3, DS3, and STS-1
all specify 75 Ohm termination loads when transmit-
ting over coaxial cable. The recommended method to
interface the Receive Section to the line in a manner
is shown in Figure 22.
FIGURE 22. RECOMMENDED SCHEMATIC FOR INTERFACING THE RECEIVE SECTION OF THE
XRT73L04B TO THE LINE (TRANSFORMER-COUPLING)
J1
BNC
T1
1:1
R1
37.4
R2
37.4
Channel (n)
RxPOS_(n)
RxNEG_(n)
RxClk_(n)
RTIP_(n)
RRing_(n)
RPOS_(n)
RNEG_(n)
RxClk_(n)
C1
0.01uf
Only One Channel Shown
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