CX28342-11

[ 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)