LXT305APE datasheet, PDF - EEWORLD Datasheet

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LXT305APE: DescriptionPCM Transceiver, 1-Func, CMOS, PQCC28, PLASTIC, LCC-28; CategoryWireless rf/communication Telecom circuit; File Size409KB，28 Pages; ManufacturerInphi Corporation

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LXT305APE Overview

PCM Transceiver, 1-Func, CMOS, PQCC28, PLASTIC, LCC-28

LXT305APE Parametric

Parameter Name	Attribute value
package instruction	QCCJ,
Reach Compliance Code	compliant
JESD-30 code	S-PQCC-J28
length	11.5062 mm
Number of functions	1
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Package shape	SQUARE
Package form	CHIP CARRIER
Certification status	Not Qualified
Maximum seat height	4.572 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Telecom integrated circuit types	PCM TRANSCEIVER
Temperature level	INDUSTRIAL
Terminal form	J BEND
Terminal pitch	1.27 mm
Terminal location	QUAD
width	11.5062 mm
Base Number Matches	1

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LXT305A

Integrated T1/E1 Short-Haul Transceiver with Transmit JA

Datasheet

The LXT305A is a fully integrated transceiver for both North American 1.544 Mbps (T1) and

International 2.048 Mbps (E1) applications. Transmit pulse shapes (T1 or E1) are selectable for

various line lengths and cable types.

The LXT305A provides transmit jitter attenuation starting at 3 Hz, and is microprocessor

controllable through a serial interface. It is especially well suited for applications in which the

T1/E1 signals are demultiplexed from a higher rate service such as DS3 or SONET/SDH. This

demultiplexing results in a gapped clock which the LXT305A smooths out.

The LXT305A, an advanced double-poly, double-metal CMOS device, requires only a single

+5V power supply.

Applications

SONET/SDH Equipment

M13 Multiplexers

Digital microwave Radio

PCM/Voice Channel Banks

Data Channel Bank/Concentrator

T1/E1 multiplexer

Digital Access and Cross-connect Systems

(DACS)

Computer to PBX interface (CPI & DMI)

High-speed data transmission lines

Interfacing Customer Premises Equipment

to a CSU

Digital Loop Carrier (DLC) terminals

Product Features

Low power consumption (400 mW

maximum)

Constant low output impedance transmitter,

regardless of data pattern (3

Ω

typical)

High transmit and receive return loss

exceeds ETS 300166 and G.703

Compatible with most popular PCM

framers

Line driver, data recovery and clock

recovery functions

Minimum receive signal of 500 mV

Selectable slicer levels (T1/E1) improve

SNR

Programmable transmit equalizer shapes

pulses to meet DSX-1 pulse template from

0 to 655 ft

Local and remote loopback functions

Transmit Driver Performance Monitor

(DPM) output

Receive monitor with analog/digital Loss

of Signal (LOS) output per G.775

Receiver jitter tolerance 0.4 UI from 40

kHz to 100 kHz

Transmit jitter attenuation starting at 3 Hz

Meets CTR 12/13

Serial control interface

Available in 28-pin DIP and PLCC

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

LXT305A — Integrated T1/E1 Short-Haul Transceiver with Transmit JA.

Order Number: 249068-001

January 2001

Integrated T1/E1 Short-Haul Transceiver with Transmit JA — LXT305A

Contents

1.0

2.0

Pin Assignments and Signal Descriptions

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

Functional Description

............................................................................................. 9

2.1

2.2

2.3

2.4

Power Requirements............................................................................................. 9

Reset Operation .................................................................................................... 9

Receiver ................................................................................................................ 9

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

2.4.1 Jitter Attenuation ....................................................................................10

2.4.2 Driver Performance Monitor ...................................................................11

2.4.3 Line Code ...............................................................................................11

Operating Modes.................................................................................................12

2.5.1 Host Mode Operation .............................................................................12

2.5.2 Hardware Mode Operation .....................................................................14

2.5.3 Diagnostic Mode Operation....................................................................14

2.5.3.1 Transmit All Ones ......................................................................14

2.5.3.2 Remote Loopback .....................................................................14

2.5.3.3 Local Loopback .........................................................................14

1.544 Mbps T1 Interface Applications .................................................................16

2.048 Mbps E1 Interface Applications.................................................................16

Line Protection ....................................................................................................17

2.5

3.0

Application Information

.........................................................................................16

3.1

3.2

3.3

4.0

5.0

Test Specifications

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

Mechanical Specifications

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

Datasheet

LXT305A — Integrated T1/E1 Short-Haul Transceiver with Transmit JA

Figures

LXT305A Block Diagram....................................................................................... 5

LXT305A Pin Assignments and Package Markings.............................................. 6

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

LXT305A Serial Interface Data Structure............................................................ 13

Typical LXT305A 1.544 Mbps T1 Host Mode Application................................... 18

Typical LXT305A 120 W 2.048 Mbps E1 Hardware Mode Application ............... 19

Typical Receive Jitter Tolerance ......................................................................... 22

LXT305A Transmit Jitter Transfer Performance (Typical)................................... 23

LXT305A Receive Clock Timing Diagram........................................................... 24

LXT305A Transmit Clock Timing Diagram.......................................................... 24

LXT305A Serial Data Input Timing Diagram ....................................................... 25

LXT305A Serial Data Output Timing Diagram .................................................... 26

Package Specifications ....................................................................................... 27

Tables

LXT305A Pin Descriptions .................................................................................... 6

LXT305A Serial Data Output Bits (See

Figure 5)................................................

Valid CLKE Settings............................................................................................ 12

Equalizer Control Inputs...................................................................................... 13

LXT305A Crystal Specifications (External) ......................................................... 14

T1/E1 Input/Output Configurations...................................................................... 17

Absolute Maximum Ratings ................................................................................ 20

Recommended Operating Conditions and Characteristics ................................. 20

Electrical Characteristics (Under Recommended Operating Conditions) ........... 20

Analog Characteristics (Under Recommended Operating Conditions) ............... 21

LXT305A Receive Timing Characteristics (See

Figure 9)...................................

LXT305A Master Clock and Transmit Timing Characteristics (See

Figure 10)...

LXT305A Serial I/O Timing Characteristics (See

Figure 11

and

Figure 12)........

Datasheet

LXT305APE Related Products

	LXT305APE	LXT305ANE
Description	PCM Transceiver, 1-Func, CMOS, PQCC28, PLASTIC, LCC-28	PCM Transceiver, 1-Func, CMOS, PQCC28, 0.600 INCH, PLASTIC, DIP-28
package instruction	QCCJ,	DIP,
Reach Compliance Code	compliant	compliant
JESD-30 code	S-PQCC-J28	R-PDIP-T28
length	11.5062 mm	37.4015 mm
Number of functions	1	1
Number of terminals	28	28
Maximum operating temperature	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	QCCJ	DIP
Package shape	SQUARE	RECTANGULAR
Package form	CHIP CARRIER	CHIP CARRIER
Certification status	Not Qualified	Not Qualified
Maximum seat height	4.572 mm	6.35 mm
Nominal supply voltage	5 V	5 V
surface mount	YES	YES
technology	CMOS	CMOS
Telecom integrated circuit types	PCM TRANSCEIVER	PCM TRANSCEIVER
Temperature level	INDUSTRIAL	INDUSTRIAL
Terminal form	J BEND	THROUGH-HOLE
Terminal pitch	1.27 mm	2.54 mm
Terminal location	QUAD	QUAD
width	11.5062 mm	15.24 mm
Base Number Matches	1	1

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