LXT331PH datasheet, PDF - EEWORLD Datasheet

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LXT331PH: DescriptionPCM Transceiver, 2-Func, CMOS, PQCC44, PLASTIC, LCC-44; CategoryWireless rf/communication Telecom circuit; File Size201KB，32 Pages; ManufacturerIntel; Websitehttp://www.intel.com/

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LXT331PH Overview

PCM Transceiver, 2-Func, CMOS, PQCC44, PLASTIC, LCC-44

LXT331PH Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Parts packaging code	LCC
package instruction	QCCJ, LDCC44,.7SQ
Contacts	44
Reach Compliance Code	compliant
JESD-30 code	S-PQCC-J44
JESD-609 code	e0
length	16.5862 mm
Number of functions	2
Number of terminals	44
Maximum operating temperature	85 °C
Minimum operating temperature	-5 °C
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Encapsulate equivalent code	LDCC44,.7SQ
Package shape	SQUARE
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Maximum seat height	4.57 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Telecom integrated circuit types	PCM TRANSCEIVER
Temperature level	OTHER
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	J BEND
Terminal pitch	1.27 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	16.5862 mm
Base Number Matches	1

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LXT331

Dual T1/E1 Line Interface Unit

Datasheet

The LXT331 is a Dual Line Interface Unit (DLIU) optimized for North America 1.544 Mbps

(T1) and international 2.048 Mbps (E1/CEPT) applications. It features a constant low output

impedance transmitter for high return loss. Transmit pulse shape is selectable for various line

lengths and cable types. The data recovery circuit also offers selectable slicer ratios for T1 or E1

applications.

The LXT331 offers both a serial interface (SIO) for microprocessor control and a hardware

control mode for stand-alone operation.

The LXT331 offers a variety of advanced diagnostic and performance monitoring features. It

uses an advanced double-poly, double-metal CMOS process and requires only a single 5-volt

power supply.

Applications

Digital Access and Cross-connect Systems

(DACS)

T1/E1 Multiplexer

SONET/SDH Multiplexers

Digital Loop Carrier (DLC) terminals

Cost efficient AFE for Digital Backend

ASICS

Analog LOS using PMRK/NMRK

Product Features

Complete line driver and data recovery

functions

Constant low output impedance transmitter

with a programmable equalizer that shapes

pulses to meet the DSX-1 pulse template

from 0 to 655 ft.

High transmit and receive return loss

Meets or exceeds industry specifications

including ITU G.703 and ANSI T1. 102-

1993

Compatible with industry standard framers

Minimum receive signal of 500 mV, with

selectable slicer levels (E1/DSX-1) to

improve SNR

Analog loopback function

Transmit performance monitors with

Driver Fail Monitor (DFM) output for

transmit driver short circuit detection

Transmit Driver Performance Monitor

(DPM) output on external pins MTIP and

MRING

Available in 44-pin PLCC and 44-pin QFP

packages

As of January 15, 2001, this document replaces the Level One document

LXT331 — Dual T1/E1 Line Interface Unit.

Order Number: 249074-001

January 2001

Dual T1/E1 Line Interface Unit — LXT331

Contents

1.0

2.0

Pin Assignments & Signal Descriptions

.......................................................... 6

Functional Description

...........................................................................................10

2.1

2.2

Receiver ..............................................................................................................10

Transmitter ..........................................................................................................10

2.2.1 Pulse Shape ...........................................................................................11

2.2.2 Driver Performance Monitor ...................................................................11

2.2.3 Driver Failure Monitor.............................................................................12

Control Modes .....................................................................................................12

2.3.1 Host Mode Control .................................................................................13

2.3.1.1 Serial Input Word.......................................................................13

2.3.1.2 Serial Output Word ....................................................................14

2.3.1.3 Interrupt Handling......................................................................14

2.3.2 Hardware Mode Control .........................................................................14

Diagnostic Mode Operation.................................................................................18

Initialization & Reset............................................................................................19

Power Requirements...........................................................................................20

3.1.1 Line Interface Requirements ..................................................................20

Line Protection ....................................................................................................21

3.2.1 1.544 Mbps T1 Applications ...................................................................21

3.2.2 2.048 Mbps E1 Coax Applications .........................................................21

3.2.3 2.048 Mbps E1 Twisted-Pair Applications..............................................22

2.3

2.4

2.5

3.0

Application Information

.........................................................................................20

3.1

3.2

4.0

5.0

Test Specifications

..................................................................................................25

Mechanical Specifications

....................................................................................30

Datasheet

LXT331 — Dual T1/E1 Line Interface Unit

Figures

LXT331 Block Diagram ......................................................................................... 5

LXT331 44 Pin Assignments and Markings .......................................................... 6

50% AMI Coding ................................................................................................. 11

LXT331 Driver Performance Monitor .................................................................. 13

LXT331 SIO Write Operations ............................................................................ 15

LXT331 SIO Read Operation .............................................................................. 16

LXT331 Interrupt Handling .................................................................................. 17

Transmit All Ones Data Path............................................................................... 18

TAOS with Analog Loopback .............................................................................. 19

Analog Loopback ................................................................................................ 19

Line Interface for E1 Coax ................................................................................. 22

Typical LXT331 T1 Application (Host Control Mode, Bipolar I/O) ....................... 23

Typical LXT331 E1 120 W Twisted Pair Application (Hardware Control Mode) . 24

LXT331 Transmit Clock Timing........................................................................... 27

LXT331 Receive Timing...................................................................................... 28

LXT331 Serial Input Timing Diagram .................................................................. 29

LXT331 Serial Output Timing Diagram ............................................................... 29

LXT331 PLCC Package Specification................................................................. 30

LXT331 QFP Package Specification................................................................... 31

Tables

Pin Descriptions .................................................................................................... 7

Equalizer Control Inputs - Hardware Mode1 ....................................................... 12

SIO Input Bit Settings (See

Figure 5)

.................................................................. 14

LXT331 Serial Data Output Bit Coding ............................................................... 15

Hardware Mode Diagnostic Selection ................................................................. 18

Recommended Transmit Transformer Values .................................................... 20

Transmit Transformer Combinations................................................................... 20

Absolute Maximum Ratings ................................................................................ 25

Recommended Operating Conditions ................................................................. 25

Electrical Characteristics (Over Recommended Operating Range) .................... 25

Analog Specifications (Over Recommended Operating Range) ......................... 26

LXT331 Master Clock and Transmit Timing Characteristics (See

Figure 14)

..... 27

LXT331 Receive Characteristics (See

Figure 15)

............................................... 27

LXT331 Serial I/O Timing Characteristics (See

Figure 16

and

Figure 17)

.......... 28

Datasheet

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