Universal 10BASE-T and AUI Transceivers — LXT901/907
Contents
1.0
2.0
Pin Assignments and Signal Descriptions......................................................8
Functional Description...........................................................................................12
2.1
2.2
Controller Compatibility Modes ...........................................................................13
Transmit Function................................................................................................13
2.2.1 Jabber Control Function.........................................................................14
2.2.2 SQE Function.........................................................................................14
2.2.2.1 SQE Disable Function (LXT907 only) ......................................15
2.3
2.4
Receive Function.................................................................................................15
2.3.1 Polarity Reverse Function ......................................................................16
2.3.2 Collision Detection Function...................................................................16
Loopback Functions ............................................................................................17
2.4.1 Standard TP Loopback...........................................................................17
2.4.2 External Loopback..................................................................................17
2.4.3 Forced TP Loopback..............................................................................17
2.4.4 AUI Loopback.........................................................................................17
Link Integrity Test Function .................................................................................17
2.5.1 Remote Signaling...................................................................................19
2.5
3.0
Application Information.........................................................................................20
3.1
3.2
3.3
3.4
Twisted-Pair Impedance Matching......................................................................20
Crystal Information ..............................................................................................20
Magnetics Information.........................................................................................21
Typical Applications.............................................................................................21
3.4.1 Auto Port Select with External Loopback Control...................................21
3.4.2 Full Duplex Support................................................................................24
3.4.3 Dual Network Support - 10Base-T and Token Ring...............................25
3.4.4 Manual Port Select with Link Test Function ...........................................26
3.4.5 Three Media Application.........................................................................28
3.4.6 AUI Encoder/Decoder ONLY..................................................................29
3.4.7 150 Ω Shielded Twisted-Pair Only (LXT901 only)..................................30
4.0
Test Specifications..................................................................................................31
4.1
4.2
4.3
4.4
Timing Diagrams for Mode 1 (MD1 = Low, MD0 = Low)
Figure 17 through Figure 22................................................................................35
Timing Diagrams for Mode 2 (MD1=Low, MD0=High)
Figure 23 through Figure 28................................................................................37
Timing Diagrams for Mode 3 (MD1 = High, MD0 = Low)
Figure 29 through Figure 36................................................................................39
Timing Diagrams for Mode 4 (MD1 = High, MD0 = High)
Figure 37 through Figure 42................................................................................42
5.0
Mechanical Specifications....................................................................................44
Datasheet
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