参数资料
型号: XRT73LC04AIV-F
厂商: Exar Corporation
文件页数: 33/64页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 4CH 144LQFP
标准包装: 60
类型: 线路接口装置(LIU)
驱动器/接收器数: 4/4
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
XRT73LC04A
35
REV. 1.0.2
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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
XRT73LC04A 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
XRT73LC04A 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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