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XRT7300 Dataheets PDF



Part Number XRT7300
Manufacturers Exar Corporation
Logo Exar Corporation
Description E3/DS3/STS-1 LINE INTERFACE UNIT
Datasheet XRT7300 DatasheetXRT7300 Datasheet (PDF)

www.DataSheet4U.com áç FEBRUARY 2002 XRT7300 E3/DS3/STS-1 LINE INTERFACE UNIT REV. 1.1.1 GENERAL DESCRIPTION The XRT7300 DS3/E3/STS-1 Line Interface Unit is designed to be used in DS3, E3 or SONET STS-1 applications and consists of a line transmitter and receiver integrated on a single chip. XRT7300 can be configured to support the E3 (34.368 Mbps), DS3 (44.736 Mbps) or the SONET STS-1 (51.84 Mbps) rates. In the transmit direction, the XRT7300 encodes input data to either B3ZS (for DS3/STS-1 .

  XRT7300   XRT7300


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www.DataSheet4U.com áç FEBRUARY 2002 XRT7300 E3/DS3/STS-1 LINE INTERFACE UNIT REV. 1.1.1 GENERAL DESCRIPTION The XRT7300 DS3/E3/STS-1 Line Interface Unit is designed to be used in DS3, E3 or SONET STS-1 applications and consists of a line transmitter and receiver integrated on a single chip. XRT7300 can be configured to support the E3 (34.368 Mbps), DS3 (44.736 Mbps) or the SONET STS-1 (51.84 Mbps) rates. In the transmit direction, the XRT7300 encodes input data to either B3ZS (for DS3/STS-1 applications) or HDB3 (for E3 applications) format and converts the data into the appropriate pulse shapes for transmission over coaxial cable via a 1:1 transformer. In the receive direction the XRT7300 performs equalization on incoming signals, performs Clock Recovery, decodes data from either B3ZS or HDB3 format, converts the receive data into TTL/CMOS format, checks for LOS or LOL conditions and detects and declares the occurrence of line code violations. The XRT7300 also contains a 4-Wire Microprocessor Serial Interface for accessing the on-chip Command registers. FIGURE 1. BLOCK DIAGRAM OF THE XRT7300 E3 STS-1/DS3 Host/(HW) FEATURES • Meets E3/DS3/STS-1 Jitter Tolerance Requirements • Full Loop-Back Capability • Transmit and Receive Power Down Modes • Full Redundancy Support • Contains a 4-Wire Microprocessor Serial Interface • Uses Minimum External components • Requires Single +5V Power Supply • -40°C to +85°C Operating Temperature Range • Available in a 44 pin TQFP package APPLICATIONS • Interfaces to E3, DS3 or SONET STS-1 Networks • CSU/DSU Equipment • PCM Test Equipment • Fiber Optic Terminals • Multiplexers NOTE: This Device is Protected by US Patent # 6,157,270 RLOL EXCLK ICT RCLK2INV RTIP RRING REQDIS AGC/ Equalizer Peak Detector Slicer Clock Recovery Data Recovery Invert RCLK1 LCV/(RCLK2) LOSTHR SDI SDO/(LCV) SClk CS REGRESET TTIP Pulse Shaping TRING MTIP MRING DMO Tx Control Serial Processor Interface LOS Detector HDB3/ B3ZS Decoder RPOS RNEG DECODIS RLOS LLB RLB ENCODIS TAOS TPDATA TNDATA Loop MUX HDB3/ B3ZS Encoder Transmit Logic Duty Cycle Adjust TClk TXLEV TXOFF Device Monitor Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XRT7300 E3/DS3/STS-1 LINE INTERFACE UNIT REV. 1.1.1 áç ORDERING INFORMATION PART NUMBER XRT7300IV PACKAGE TYPE 44 Pin TQFP (10mm x 10mm) OPERATING TEMPERATURE RANGE -40°C to +85°C FIGURE 2. PIN OUT OF THE XRT7300 IN THE 44 PIN TQFP TNDATA TPDATA MRING TXOFF 35 TRING TCLK MTIP GND TTIP VDD 44 43 42 41 40 39 38 37 36 34 TxLEV TAOS VDD DMO GND GND GND RTIP RRING VDD REGRESET/ RCLK2INV 1 2 3 4 5 6 7 8 9 10 11 ICT 33 32 31 30 29 28 27 26 25 24 23 RPOS RNEG RCLK1 LCV/(RCLK2) VDD GND EXCLK VDD GND RLOS RLOL XRT7300 (Top View) 12 REQDIS 13 LOSTHR 14 LLB 15 RLB 16 STS1/DS3 17 E3 18 HOST/HW 19 SDI/(LOSMUTEN) 20 SDO/(LCV) 21 SCLK/(ENCODIS) 22 CS/(DECODIS) 2 áç E3/DS3/STS-1 LINE INTERFACE UNIT XRT7300 REV. 1.1.1 TABLE OF CONTENTS General description ........................................................................................................... 1 FEATURES ................................................................................................................................................. 1 APPLICATIONS .......................................................................................................................................... 1 Figure 1.Block Diagram of the XRT7300............................................................................................................ 1 Ordering Information ......................................................................................................... 2 Figure 2.Pin Out of the XRT7300 in the 44 Pin TQFP........................................................................................ 2 TABLE OF CONTENTS ......................................................................................................... I Pin Description ................................................................................................................... 3 Electrical Characteristics ................................................................................................ 10 DC ELECTRICAL CHARACTERISTICS (TA = 25°C, VDD = 5.0V + 5%, UNLESS OTHERWISE SPECIFIED) ............................................................................................................................................................... 10 AC ELECTRICAL CHARACTERISTICS (TA = 25°C, VDD = 5.0V + 5%, UNLESS OTHERWISE SPECIFIED) ............................................................................................................................................................... 10 Figure 3.Timing Diagram of the Transmit Terminal Input Interface .................................................................. 11 Figure 4.Timing Diagram of the Receive Terminal Output Interface ..................................


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