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CX28333-1X 参数 Datasheet PDF下载

CX28333-1X图片预览
型号: CX28333-1X
PDF下载: 下载PDF文件 查看货源
内容描述: 单/双/三E3 / DS3 / STS - 1线路接口单元 [Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit]
分类和应用: 电信集成电路PC
文件页数/大小: 68 页 / 549 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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Advance Information
This document contains information on a product under development. The parametric information
contains target parameters that are subject to change.
CX28331/CX28332/CX28333
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
The CX28333 is a three-channel, E3/DS3/STS-1 fully-integrated Line Interface Unit
(LIU). It is configured via external pins and does not need a microprocessor interface.
Each channel has an independent equalizer on the receive side requiring no user
configuration. Also, each channel has a programmable transmit pulse shaper that can
be set to ensure that the cross-connect pulse mask requirement is met for transmit
cable length up to 450 feet. The CX28332 is a dual-channel, and the CX28331 is a
single-channel LIU with performance identical to the CX28333.
The CX28333 gives the user new economies of scale in concentrator applications
where three DS3 or STS-1 channels are concentrated into a single STS-3 channel. By
including three independent transceivers on a chip, significant external components are
eliminated, with the exception of 1:1 coupling transformers, termination resistors, and
supply bypass capacitors.
NOTE:
Distinguishing Features
Can be used as a data transceiver
over a maximum of 900 feet of Type
734/728 coaxial cable or equivalent
in an on-premise environment
Programmable pulse filtering to meet
cross-connect pulse masks (ANSI
T1.102-1993)
Meets jitter specifications of
Bellcore
GR499, GR253,
and
TBR24
(with
external JAT).
Large input dynamic range
Alarms for coding violation and loss
of signal
Full diagnostic loopback capability
Uses a minimum of external
components
Compatible with
ITU-T G.703, G.823
Independent power down mode per
channel
Easily interfaced to the DS3/E3
Framer IC (CX28342/3/4/6/8 and
CN8330)
Selectable B3ZS/HDB3
encoding/decoding
Superior input receiver sensitivity
(< 25 mV)
Transmit monitor inputs (CX2833i-3x
series only)
In this document, "i" is used to represent the number of channels:
i = 1 (CX28331), i = 2 (CX28332), and i = 3 (CX28333).
Functional Block Diagram
XOE
LBO
E3MODE
PDB
TPOS
TNEG
TCLK
TAIS
PDATA/
NDATA
ENCODER
TCLK
Pulse
Shaper
LINE
DRIVER
TLINEP
TLINEM/N
Physical Characteristics
80- and 100-pin ETQFP package
Single 3.3 V power supply
1 W maximum power dissipation
(CX28333)
–40 °C to +85 °C temperature range
5 V-tolerant pins
TTL digital pins
ENDECDIS
TX
Monitor
TMONP
TMONM
TXMON
TMONTST
REFCLK
RLOOP
LLOOP
DATA
MUX
Applications
RPOS
RNEG
RCLK
RLOS
DECODER
PDATA
Clock/
NDATA
Data
DATCLK Recovery
P
N
Receiver
RLINEP
RLINEM/N
ALOS
REQH
LIU #1
LIU #2
LIU #3
Digital Cross-Connect Systems
Routers
ATM Switches
Channelized Line Aggregation Units
Test Equipment
Channel Service Units
Multiplexers
NOTE(S):
The TX Monitor is only used with the 100-pin CX2833i-3X.
Data Sheet
100985A
June 2, 2000