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LXT907 Dataheets PDF



Part Number LXT907
Manufacturers Intel
Logo Intel
Description (LXT901 / LXT907) Universal 10 Base-T and AUI Transceivers
Datasheet LXT907 DatasheetLXT907 Datasheet (PDF)

w w w .D a S a t . U LXT901/907 4 t e 10BASE-T and AUI Transceivers Universal e h m o c Datasheet The LXT901 and LXT907 Universal 10BASE-T and AUI Transceivers are designed for IEEE 802.3 physical layer applications. They provide all the active circuitry to interface most standard 802.3 controllers to either the 10BASE-T media or Attachment Unit Interface (AUI). In addition to standard 10 Mbps Ethernet, they also support full-duplex operation at 20 Mbps. The LXT901 and LXT907 are identi.

  LXT907   LXT907



Document
w w w .D a S a t . U LXT901/907 4 t e 10BASE-T and AUI Transceivers Universal e h m o c Datasheet The LXT901 and LXT907 Universal 10BASE-T and AUI Transceivers are designed for IEEE 802.3 physical layer applications. They provide all the active circuitry to interface most standard 802.3 controllers to either the 10BASE-T media or Attachment Unit Interface (AUI). In addition to standard 10 Mbps Ethernet, they also support full-duplex operation at 20 Mbps. The LXT901 and LXT907 are identical except for the function of one pin. The LXT901 offers selectable termination impedance to allow the use of either shielded or unshielded twisted-pair cable. The LXT907 offers a signal quality error (SQE) disable function. Common LXT901 and LXT907 functions include Manchester encoding/decoding, receiver squelch and transmit pulse shaping, jabber, link testing and reversed polarity detection/ correction. Integrated filters simplify the design work required for FCC-compliant EMI performance. Applications s 10BASE-T hub and switching products Product Features Functional Features s s s s Integrated Manchester Encoder/Decoder 10BASE-T Transceiver AUI Transceiver Full-Duplex Capable (20 Mbps) Diagnostic Features s s s Four LED Drivers AUI/RJ45 Loopback Remote Signaling of Link Down and Jabber conditions w w w .D t a S a e h s s s s s s s s Computer/Workstation 10BASE-T LAN adapters t e U 4 .c m o Convenience Features Automatic/Manual AUI/RJ45 Selection Automatic Polarity Correction SQE Disable function (LXT907 only) Programmable Impedance Driver (LXT901 only) Power Down Mode and four loopback modes LXT901 available in 64-pin LQFP and 44pin PLCC LXT907 available in 44-pin PLCC As of January 15, 2001, this document replaces the Level One document LXT901/907 — Universal 10BASE-T and AUI Transceivers. w w w .D at h S a t e e 4U . m o c Order Number: 249097-001 January 2001 Information in this document is provided in connection with Intel® products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The LXT901/907 may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800548-4725 or by visiting Intel’s website at http://www.intel.com. Copyright © Intel Corporation, 2001 *Third-party brands and names are the property of their respective owners. Datasheet 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 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.....................................................................


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