參數(shù)資料
型號: XRT73LC00AIV
廠商: Exar Corporation
文件頁數(shù): 21/61頁
文件大?。?/td> 0K
描述: IC LIU STS1/DS3/E3 SGL 44TQFP
標準包裝: 160
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 1/1
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: 44-LQFP
供應商設備封裝: 44-TQFP(10x10)
包裝: 托盤
XRT73LC00A
25
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.2
Figure 11 illustrates the typical interface for the transmission of data in a Dual-Rail Format between the
Terminal Equipment and the Transmit Section of the XRT73LC00A.
The manner that the LIU handles Dual-Rail data is described below and illustrated in Figure 12.
The
XRT73LC00A typically samples the data on the TPDATA and TNDATA input pins on the falling edge of TCLK.
TCLK is typically a clock signal that is of the selected data rate frequency. For the E3 data rate, TCLK is
34.368 MHz. For the DS3 data rate, TCLK is 44.736 MHz and for the SONET STS-1 rate, TCLK is 51.84 MHz.
In general, if the XRT73LC00A samples a “1” on the TPDATA input pin, the Transmit Section of the device
ultimately generates a positive polarity pulse via the TTIP and TRING output pins across a 1:1 transformer. If
the XRT73LC00A samples a “1” on the TNDATA input pin, the Transmit Section of the device ultimately
generates a negative polarity pulse via the TTIP and TRING output pins across a 1:1 transformer.
2.1.1
Accepting Single-Rail Data from the Terminal Equipment
Do the following if data is to be transmited from the Terminal Equipment to the XRT73LC00A in Single-Rail
format (a binary data stream) without having to convert it into a Dual-Rail format.
A. Configure the XRT73LC00A to operate in the HOST Mode or,
FIGURE 11. THE TYPICAL INTERFACE FOR THE TRANSMISSION OF DATA IN A DUAL-RAIL FORMAT FROM THE TRANS-
MITTING
TERMINAL EQUIPMENT TO THE TRANSMIT SECTION OF THE XRT73LC00A
FIGURE 12. HOW THE XRT73LC00A SAMPLES THE DATA ON THE TPDATA AND TNDATA INPUT PINS
Exar E3/DS3/STS-1 LIU
Terminal
Equipment
(E3/DS3 or STS-1
Framer)
Terminal
Equipment
(E3/DS3 or STS-1
Framer)
TxPOS
TxNEG
TxLineClk
Transmit
Logic
Block
Transmit
Logic
Block
TPDATA
TNDATA
TCLK
TCLK
TPDATA
TNDATA
Data
1
0
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