CX28344 Conexant, CX28344 Datasheet

CX28344

Manufacturer Part Number

CX28344

Description

(CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer

Manufacturer

Conexant

Datasheet

1.CX28344.pdf (195 pages)

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CX28342/3/4/6/8

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.

Functional Block Diagram

28348-DSH-001-B

NOTE:

The index letter i, appearing in a register’s name, represents the

channel number, one per channel.

RXPOS

RXNEG

LINECK

TXPOS

TXNEG

TCLKO

Channel 2

Channel 3

Channel 4

VCO

Framer

(Typical All Channels)

Channel 1

Framer

RXCKI

RXGAPCK

TXGAPCK

REXTCK

TEXTCK

Mindspeed Technologies™

RXMSY

TXDATI

RXDAT

TXCKI

TXSY

TEXT

ONESEC

MOTO

ALE

DTACK

INTR

Distinguishing Features

Applications

Testing

Two, three, four, six, eight independent T3/

E3 framers in one package

Line coding supported:

Framing supported:

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:

An asynchronous processor interface

LIU Interfaces:

Power Supplies and Power Consumption

Digital Cross-Connect Systems

Digital PCM Switches

Access Concentrators

CSUs

ATM Switches

Concentrators

PBXs

Routers

Test Equipment

JTAG boundary scan support

T3-B3ZS, NRZ, AMI

E3-HDB3, NRZ, AMI

T3-M13, M23, C-bit parity

E3-G.751, G.832

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

Motorola: 68000, 68020, 68030, 68302

Glueless interface to Conexant’s DS3/E3

LIU (CX2832/3)

Option for a definition of LIU’s clocks

polarity-sampling edge

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)

February

2003

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