[Conexant]



Dual/Triple/Quad/Hex/Octal-Enhanced DS3/E3 Framer

The CX28342/3/4/6/8 provides Dual, Triple, Quad, Hex, and Octal DS3/E3 framers designed to support DS3-M13, DS3-C-bit parity, E3-G.751, and E3-G.832 transmission formats. The CX28342/3/4/6/8 provides framing recovery for M13, M23, C-bit parity, G.751, and G.832 formatted signals. A FIFO buffer in the receive path can be enabled to reduce jitter on the incoming data. The CX28342/3/4/6/8 devices allow for ease of configuration, while providing

maximum flexibility to support the transmission and recovery of industry standard formats. It provides a flexible overhead bit generation method in DS3/E3 modes to source overhead bits on an individual framer.

Distinguishing Features

Two, three, four, six, eight independent T3/E3 framers in one package

Line coding supported:

  T3-B3ZS, NRZ, AMI

  E3-HDB3, NRZ, AMI

Framing supported:

  T3-M13, M23, C-bit parity

  E3-G.751, G.832

Inserts and extracts overhead bits

Full FEAC and TDL channels support

Full Performance Monitoring support per T1.231

Integrated Dejitter FIFO

Glueless interfaces to the following processors:

  Intel: 8051, 8151, 8031, 8751, 8x251

  Motorola: 68000, 68020, 68030, 68302

An asynchronous processor interface

LIU Interfaces:

  Glueless interface to Conexant’s DS3/E3

LIU (CX2832/3)

  Option for a definition of LIU’s clocks

polarity-sampling edge

Power Supplies and Power Consumption

  I/O 3.3 V, input 5 V-tolerant, core 2.5 V

  Requires 3.3 V and 2.5 V power

supplies. Optional 5 V supply required

for 5 V input tolerance

  Low power operation (<200 mW per port)