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LXT9863 Datasheet(PDF) 4 Page - Intel Corporation |
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LXT9863 Datasheet(HTML) 4 Page - Intel Corporation |
4 / 56 page Contents 4 Datasheet Document #: 249115 Revision #: 003 Rev. Date: 08/07/01 4.2.3 Power and Ground Plane Layout Considerations.................................................. 33 4.2.4 Chassis Ground ..................................................................................................... 34 4.2.5 The RBIAS Pin....................................................................................................... 34 4.2.6 MII Terminations .................................................................................................... 35 4.2.7 Twisted-Pair Interface............................................................................................ 36 4.2.7.1 Magnetics Information............................................................................ 36 4.2.8 Clock......................................................................................................................37 4.2.9 LED Circuits........................................................................................................... 39 4.2.9.1 Direct Drive LEDs .................................................................................. 39 4.2.9.2 LED Pins Multiplexed with Configuration Inputs .................................... 39 4.2.9.3 Serial LEDs ............................................................................................ 40 4.3 Inter-Repeater Backplane Compatibility ............................................................................. 41 4.3.1 Local Backplane—3.3V Only ................................................................................. 41 4.3.2 Stack Backplane—3.3V or 5V ............................................................................... 41 4.3.2.1 3.3V-Only Stacks ................................................................................... 41 4.3.2.2 For 5V Backwards Stackability .............................................................. 41 4.3.2.3 3.3V and 5.0V Stacking Boards Cannot Be Mixed ................................ 41 5.0 Test Specifications...................................................................................................................... 44 6.0 Mechanical Specifications.......................................................................................................... 56 Figures 1 LXT98x3 Block Diagram............................................................................................................... 7 2 LXT9883 Pin Assignments ........................................................................................................... 8 3 Typical LXT9883 Repeater Architecture .................................................................................... 17 4 MII Interface................................................................................................................................ 19 5 Serial LED Shift Loading ........................................................................................................... 22 6 Serial LED Port Signaling ........................................................................................................... 23 7 100M IRB Connection ................................................................................................................ 29 8 IRB Block Diagram .................................................................................................................... 30 9 LXT9883 MII Operation .............................................................................................................. 32 10 Power and Ground Connections ................................................................................................ 35 11 Typical Twisted-Pair Port Interface and Power Supply Filtering ................................................ 38 12 Typical Reset Circuit .................................................................................................................. 38 13 LED Circuits - Direct Drive & Multiplexed Configuration Inputs .................................................. 39 14 Serial LED Circuit ....................................................................................................................... 40 15 100M Backplane Connection between LXT98x and LXT98x3 ................................................... 42 16 Typical 100 Mbps IRB Implementation ...................................................................................... 43 17 Typical 10 Mbps IRB Implementation ........................................................................................ 43 18 100 Mbps TP Port-to-Port Delay Timing..................................................................................... 48 19 100BASE-TX MII-to-TP Port Timing .......................................................................................... 49 20 100BASE-TX TP-to-MII Timing ................................................................................................. 50 21 10BASE-T MII-to-TP Timing ...................................................................................................... 51 22 10BASE-T TP-to-MII Port Timing .............................................................................................. 52 23 100 Mbps TP-to-IRB Timing ...................................................................................................... 53 24 10 Mbps TP-to-IRB Timing ........................................................................................................ 54 25 10 Mbps IRB-to-TP Port Timing ................................................................................................55 26 LXT98x3 Package Specifications .............................................................................................. 56 |
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