GENERAL DESCRIPTION
The XRT79L71 is a single channel, integrated DS3/E3 framing controller and Line Interface Unit with Jitter Attenuator that is designed to support Frame processing. For Clear-Channel Framer applications, this device supports the transmission and reception of âuser dataâ via the DS3/E3 payload.
The XRT79L71 includes DS3/E3 Framing, Line Interface Unit with Jitter Attenuator that supports mapping of HDLC framed data. A flexible parallel microprocessor interface is provided for configuration and control.
GENERAL FEATURES:
â Integrated T3/E3 Line Interface Unit
â Integrated Jitter Attenuator that can be selected
either in Receive or Transmit path
â HDLC Controller that provides the mapping/
extraction of either bit or byte mapped
encapsulated packet from DS3/E3 Frame.
â Contains on-chip 16 cell FIFO (configurable in
depths of 4, 8, 12 or 16 cells), in both the Transmit
(TxFIFO) and Receive Directions (RxFIFO)
â Contains on-chip 54 byte Transmit and Receive
OAM Cell Buffer for transmission, reception and
processing of OAM Cells
â Supports M13 and C-Bit Parity Framing Formats
â Supports DS3/E3 Clear-Channel Framing.
â Includes PRBS Generator and Receiver
â Supports Line, Cell, and PLCP Loop-backs
â Interfaces to 8 Bit wide Intel, Motorola, PowerPC,
and Mips µPs
â Low power 3.3V, 5V Input Tolerant, CMOS
â Available in 208 STBGA Package
â JTAG Interface (Continue ...)
APPLICATIONS
â Digital Access and Cross Connect Systems
â 3G Base Stations
â DSLAMs
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