LXT318PE datasheet, PDF - EEWORLD Datasheet

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LXT318PE: DescriptionPCM Transceiver, 1-Func, CEPT PCM-30/E-1, CMOS, PQCC28, PLASTIC, LCC-28; CategoryWireless rf/communication Telecom circuit; File Size249KB，34 Pages; ManufacturerIntel; Websitehttp://www.intel.com/

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LXT318PE Overview

PCM Transceiver, 1-Func, CEPT PCM-30/E-1, CMOS, PQCC28, PLASTIC, LCC-28

LXT318PE Parametric

Parameter Name	Attribute value
Parts packaging code	QLCC
package instruction	QCCJ, LDCC28,.5SQ
Contacts	28
Reach Compliance Code	compliant
Carrier type	CEPT PCM-30/E-1
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
Encapsulate equivalent code	LDCC28,.5SQ
Package shape	SQUARE
Package form	CHIP CARRIER
power supply	5 V
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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LXT318

E1 NTU/ISDN PRI Transceiver

Datasheet

The LXT318 is the first fully integrated transceiver for E1 Network Termination Unit (NTU) and

ISDN Primary Rate Interface (ISDN PRI) applications at 2.048 Mbps. The transceiver operates

from 0.0 km to 2.6 km of 0.6 mm (22

AWG

) twisted-pair cable with no external components.

The LXT318 offers selectable HDB3 encoding/decoding, and unipolar or bipolar data I/O. The

LXT318 also provides jitter attenuation in either the transmit or receive direction starting at 3

Hz, and incorporates a serial interface (SIO) for microprocessor control.

The LXT318 offers a variety of diagnostic features including loopbacks and loss of signal

monitoring. It is built using an advanced double-poly, double-metal CMOS process and requires

only a single 5-volt power supply.

Applications

PCM 30/ISDN PRI Interface (ITU G.703,

I.431)

NTU (interface to E1 Service)

E1 Mux or LAN bridge - Campus

Networking

Wireless Base Stations/Networking

CPU to CPU Channel Extenders

Digital Loop Carrier — Subscriber Carrier

Systems

Channel Banks

HDSL - E1 Extension

Product Features

Fully integrated transceiver comprising:

on-chip equalizer; timing recovery/control;

data processor; receiver; transmitter and

digital control

Pin compatible with the LXT310 T1 CSU/

ISDN PRI (1.544 Mbps) transceiver

Meets or exceeds latest ITU specifications

including G.703, G.736, G.823, and I.431

Meets ETSI 300011 and 300233 standards

Jitter attenuation starting at 3 Hz,

switchable to transmit or receive path

Exceeds ETSI TBR12/13 jitter transfer

performance specifications

Fully restores the received signal after

transmission via a cable with attenuation of

43 dB @ 1024 kHz

Selectable Unipolar or Bipolar data I/O

Selectable HDB3 encoding/decoding

Output short circuit current limit protection

Meets 50 mA

RMS

short-circuit current

limit

(per OFTEL OTR-001)

On-line idle mode for testing or for

redundant systems

Local and remote loopback functions

Receive monitor with Loss of Signal (LOS)

output

Microprocessor controllable

Available in 28-pin DIP and PLCC

Extended Temperature Range (-40° C to

+85° C)

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

LXT318 — E1 NTU/ISDN PRI Transceiver.

Order Number: 249073-001

January 2001

E1 NTU/ISDN PRI Transceiver — LXT318

Contents

1.0

2.0

Pin Assignments and Signal Descriptions

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

Functional Description

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

2.1

Transmitter ............................................................................................................ 9

2.1.1 Line Code .................................................................................................9

2.1.2 Idle Mode.................................................................................................. 9

2.1.3 Short Circuit Limit ...................................................................................10

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

2.2.1 Jitter Attenuation ....................................................................................10

Control Modes .....................................................................................................11

Host Mode Control ..............................................................................................11

2.4.1 Serial Input Word....................................................................................12

2.4.2 Serial Output Word.................................................................................12

2.4.3 Hardware Mode Operation .....................................................................12

Initialization and Reset ........................................................................................12

Interrupt Handling................................................................................................15

Diagnostic Mode Operation.................................................................................17

2.7.1 Transmit All Ones...................................................................................17

2.7.2 Local Loopback. .....................................................................................18

2.7.3 Remote Loopback. .................................................................................18

2.7.4 Network Loopback Detection. ................................................................19

LATN Decoder.....................................................................................................20

Power Requirements...........................................................................................21

Crystal Specifications ..........................................................................................21

3.3.1 LXT318 Host Mode Applications ............................................................21

3.3.2 LXT318 Hardware Mode Applications....................................................22

2.2

2.3

2.4

2.5

2.6

2.7

3.0

Application Information

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

3.1

3.2

3.3

4.0

5.0

Test Specifications

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

Mechanical Specifications

....................................................................................33

Datasheet

LXT318 — E1 NTU/ISDN PRI Transceiver

Figures

LXT318 Block Diagram ......................................................................................... 5

LXT318 Pin Assignments and Package Markings ................................................ 6

50% Duty Cycle Coding Diagram.......................................................................... 9

LXT318 Line Attenuation (LATN) Pulse Width Encoding.................................... 13

LXT318 Serial I/O Input Data Structure .............................................................. 14

LXT318 Serial I/O Output Data Structure............................................................ 15

LXT318 Interrupt Handling .................................................................................. 16

Transmit All Ones................................................................................................ 17

Local Loopback ................................................................................................... 18

Remote Loopback ............................................................................................... 19

Typical LATN Decoding Circuit ........................................................................... 20

Typical LXT318 Host Mode E1/NTU, 120

Ω

Twisted Pair Application ................ 22

Typical LXT318 Hardware Mode, 120

Ω

Twisted Pair Application...................... 23

Typical LXT318 Hardware Mode, 75

Ω

Coax Application ................................... 24

LXT318 Transmit Clock Timing........................................................................... 27

LXT318 Receive Clock Timing............................................................................ 27

LXT318 Serial Data Input Timing Diagram ......................................................... 28

LXT318 Serial Data Output Timing Diagram....................................................... 29

LXT318 Jitter Tolerance @ 43 dB (Typical) ........................................................ 29

LXT318 Jitter Attenuation (Typical)..................................................................... 30

Input and Maximum Output Jitter Specified by TBR12/13 .................................. 31

LXT318 Jitter Attenuation Performance (Typical–Measured Against TBR12/13)31

2.048 Mbps Pulse Mask...................................................................................... 32

Package Specifications ....................................................................................... 33

Tables

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

Unipolar Data I/O Pin Descriptions1 ..................................................................... 8

CLKE Settings..................................................................................................... 11

SIO Input Bits (See

Figure 5)

.............................................................................. 11

LXT318 Serial Data Output Bit Coding (See

Figure 6)

....................................... 13

Line Attenuation Decoding .................................................................................. 20

Jitter Attenuator Crystal Specifications ............................................................... 21

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

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

Digital Characteristics (Over Recommended Operating Conditions) .................. 25

Analog Characteristics (Over Recommended Operating Conditions) ................. 26

LXT318 Master Clock and Transmit Timing Characteristics (See

Figure 15)

..... 26

LXT318 Receive Timing Characteristics (See

Figure 16)

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

LXT318 Serial I/O Timing Characteristics (See

Figure 17

and

Figure 18)

.......... 28

2.048 Mbps Pulse Mask Parameters .................................................................. 32

Datasheet

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