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XRT79L73 Datasheet(PDF) 2 Page - Exar Corporation |
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XRT79L73 Datasheet(HTML) 2 Page - Exar Corporation |
2 / 71 page XRT79L73 PRELIMINARY ÿþ ÿþ ÿþ ÿþ REV. P1.0.0 3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC 2 • Extraction of ATM cells from PLCP frame or directly from E3 or DS3 frame • Termination of PLCP frame • Supports payload cell de-scrambling TRANSMIT PACKET PROCESSING • Inserts PPP packets into data stream • Maps HDLC data stream directly into DS3 or E3 frame • Extracts in-band messaging packets • Supports CRC-16/32, HDLC flag and Idle sequence generation RECEIVE PACKET PROCESSING • Extracts HDLC data stream from DS3 or E3 frame • Inserts in-band messaging packets • Detects and removes HDLC flags UTOPIA/SYSTEM INTERFACE • 8/16 bit UTOPIA Level I and II and PPP Multi-PHY Interface operating at 25, 33 or 50 MHz. • Compliant with ATM Forum UTOPIA II interface • Programmable FIFO size for both Transmit and Receive direction • Compliant to POS-PHY Level 2 interface SERIAL INTERFACE • Serial clock and data interface for accessing DS3/ E3 framer • Serial clock and data interface for accessing cell/ packet processor APPLICATIONS • Digital Access and Cross Connect Systems • 3G Base Stations • DSLAMs • Digital, ATM, WAN and LAN Switches PRODUCT ORDERING INFORMATION FIGURE 1. BLOCK DIAGRAM OF THE XRT79L73 TU-3 POH Processor Jitter Attenuator Rx DS3/ E3 Framer PLCP & Overhead UTOPIA/ POS-PHY Interface HDLC Controller 2 Receiver Block JTAG Test Port Clock & Data Recov ery AGC/ Equalizer RTIP RRING Transmitter Block ATM Cell Processor or PPP Processor UTOPIA/ POS-PHY Interface ATM Cell Processor or PPP Processor HDLC Controller PLCP & Overhead Tx DS3/ E3 Framer Jitter Attenuator Timing Control Pulse Shaper TTIP TRING Microprocessor Interface 12.288 MHz ClkIN Clock Synthesizer E3CLK DS3CLK Receive Utopia POS-PHY Interface Transmit Utopia POS-PHY Interface Channel 1 of 3 PRODUCT NUMBER PACKAGE TYPE OPERATING TEMPERATURE RANGE XRT79L73IB 456 Lead PBGA -40°C to +85°C |
Similar Part No. - XRT79L73 |
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Similar Description - XRT79L73 |
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