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XRT73LC04A Datasheet(PDF) 4 Page - Exar Corporation |
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XRT73LC04A Datasheet(HTML) 4 Page - Exar Corporation |
4 / 64 page XRT73LC04A I 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT REV. 1.0.2 TABLE OF CONTENTS GENERAL DESCRIPTION ......................................................................................................... 1 FEATURES .................................................................................................................................................... 1 APPLICATIONS ......................................................................................................................................... 1 Figure 1.XRT73LC04A Block Diagram ............................................................................................................. 1 TYPICAL APPLICATIONS ................................................................................................................................. 2 Figure 2.MultiChannel ATM Application ............................................................................................................ 2 Figure 3.MultiService - Frame Relay Application .............................................................................................. 2 TRANSMIT INTERFACE CHARACTERISTICS: ..................................................................................................... 2 RECEIVE INTERFACE CHARACTERISTICS: ....................................................................................................... 2 Figure 4.Pin out of the XRT73LC04A in the 144 Pin TQFP package ............................................................... 3 ORDERING INFORMATION ....................................................................................................... 3 TABLE OF CONTENTS ....................................................................................................... I PIN DESCRIPTIONS (BY FUNCTION) ......................................................................................... 4 TRANSMIT INTERFACE ................................................................................................................................... 4 RECEIVE INTERFACE ..................................................................................................................................... 6 CLOCK INTERFACE ........................................................................................................................................ 7 OPERATING MODE SELECT ........................................................................................................................... 8 CONTROL AND ALARM INTERFACE ................................................................................................................. 9 MICROPROCESSOR INTERFACE .................................................................................................................... 11 POWER AND GROUND PINS ......................................................................................................................... 13 NO CONNECTION PINS ................................................................................................................................ 14 ELECTRICAL CHARACTERISTICS ........................................................................................... 15 ABSOLUTE MAXIMUM RATINGS .................................................................................................................... 15 DC Electrical Characteristics .......................................................................................................... 15 AC Electrical Characteristics (See Figure 5) ........................................................................................................ 16 Terminal Side Timing Parameters (See Figure 6 and Figure 7) -- {(n) = 0, 1, 2 or 3 } ......................................... 16 Figure 5.Transmit Pulse Amplitude Test Circuit for E3, DS3 and STS-1 Rates (typical channel) .................. 17 Figure 6.Timing Diagram of the Transmit Terminal Input Interface ................................................................. 17 Figure 7.Timing Diagram of the Receive Terminal Output Interface ............................................................... 17 Line Side Parameters E3 Application ................................................................................................................... 18 Transmit Characteristics (see Figure 5) ............................................................................................................... 18 Line Side Parameters Sonet STS-1 Application ................................................................................................... 19 Transmit Characteristics (See Figure 5) ............................................................................................................... 19 Line Side Parameters DS3 Application ................................................................................................................ 20 Transmit Characteristics (see Figure 5) ............................................................................................................... 20 Figure 8.ITU-T G.703 Transmit Output Pulse Template for E3 Applications .................................................. 21 Figure 9.Bellcore GR-499-CORE Transmit Output Pulse Template for DS3 Applications ............................. 21 Figure 10.Bellcore GR-253-CORE Transmit Output Pulse Template for SONET STS-1 Applications ........... 22 Figure 11.Microprocessor Serial Interface Data Structure .............................................................................. 22 Microprocessor Serial Interface Timing (See Figure 12) ...................................................................................... 23 Figure 12.Timing Diagram for the Microprocessor Serial Interface ................................................................. 23 SYSTEM DESCRIPTION .................................................................................................. 24 THE TRANSMIT SECTION - CHANNELS 0, 1, 2, AND 3 .................................................................................... 24 THE RECEIVE SECTION - CHANNELS 0, 1, 2 AND 3 ....................................................................................... 24 THE MICROPROCESSOR SERIAL INTERFACE ................................................................................................. 24 Table 1:Role of Microprocessor Serial Interface pins when the XRT73LC04A is operating in the Hardware Mode 24 Figure 13.Functional Block Diagram of the XRT73LC04A .............................................................................. 25 |
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