XRT79L71 Datasheet PDF - Exar Corporation

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 “user data” 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:
● Integrated T3/E3 Line Interface Unit
● Integrated Jitter Attenuator that can be selected
   either in Receive or Transmit path
● HDLC Controller that provides the mapping/
   extraction of either bit or byte mapped
   encapsulated packet from DS3/E3 Frame.
● 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)
● Contains on-chip 54 byte Transmit and Receive
   OAM Cell Buffer for transmission, reception and
   processing of OAM Cells
● Supports M13 and C-Bit Parity Framing Formats
● Supports DS3/E3 Clear-Channel Framing.
● Includes PRBS Generator and Receiver
● Supports Line, Cell, and PLCP Loop-backs
● Interfaces to 8 Bit wide Intel, Motorola, PowerPC,
   and Mips µPs
● Low power 3.3V, 5V Input Tolerant, CMOS
● Available in 208 STBGA Package
● JTAG Interface (Continue ...)

APPLICATIONS
● Digital Access and Cross Connect Systems
● 3G Base Stations
● DSLAMs