LXT914 View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

LXT914

Flexible Quad Ethernet Repeater

Intel 

Intel® LXT914 Flexible Quad Ethernet Repeater

Contents

1.0 LXT914 Pin Assignments and Signal Descriptions....................................................................7

2.0 Functional Description................................................................................................................ 14

2.1 Introduction ......................................................................................................................... 14

2.2 External Interfaces .............................................................................................................. 14

2.2.1 10BASE-T Ports .................................................................................................... 14

2.2.2 AUI Port ................................................................................................................. 14

2.2.3 Serial Port .............................................................................................................. 14

2.2.4 Inter-Repeater Backplane ...................................................................................... 15

2.2.4.1 Synchronous IRB Operation ..................................................................15

2.2.4.2 Asynchronous IRB Operation ................................................................ 15

2.3 Internal Repeater Circuitry .................................................................................................. 15

2.4 Initialization ......................................................................................................................... 16

2.4.1 Local Management Mode Initialization ..................................................................16

2.4.2 External Management Mode Initialization .............................................................. 19

2.5 10BASE-T Port Operation .................................................................................................. 20

2.5.1 10BASE-T Reception............................................................................................. 20

2.5.1.1 Programmable Internal Squelch Level................................................... 21

2.5.1.2 Polarity Detection and Correction .......................................................... 21

2.5.2 10BASE-T Transmission ....................................................................................... 21

2.5.3 10BASE-T Link Integrity Testing............................................................................ 21

2.6 AUI Port Operation ............................................................................................................. 22

2.6.1 AUI Reception........................................................................................................22

2.6.2 AUI Transmission .................................................................................................. 22

2.6.3 AUI Mode Selection (DTE/MAU)............................................................................ 22

2.7 Collision Handling ...............................................................................................................23

2.8 Security Mode ..................................................................................................................... 23

2.9 LED Display ........................................................................................................................ 23

3.0 Application Information .............................................................................................................. 27

3.1 Layout Requirements.......................................................................................................... 27

3.1.1 The Twisted Pair Interface .....................................................................................27

3.1.2 The RBIAS Pin....................................................................................................... 27

3.2 12-Port Hub Repeater......................................................................................................... 27

3.3 8-Port Print or File Server ................................................................................................... 28

4.0 Test Specifications ......................................................................................................................35

5.0 Package Specifications...............................................................................................................40

5.1 Top-Label Marking .............................................................................................................. 42

6.0 Product Ordering Information .................................................................................................... 44

Datasheet

Intel® LXT914 Flexible Quad Ethernet Repeater

Order Number: 248989, Revision: 003

31-Oct-2005

3

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