LXT901/907 Universal 10BASE-T and AUI Transceivers 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 IEEE 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 polity detection/correction. Integrated filters simplify the design work required for FCC-compliance EMI performance. Applications Access devices (DSL, Cable Modems, and Telecom Backplane Set-Top Boxes). USB to Ethernet Converters Routers/Bridges/Switches/Hubs Product Features Functional Features Convenience Features Integrated Manchester Encoder/Decoder Automatic/Manual AUI/RJ-45 Selection 10BASE-T Transceiver Automatic Polarity Correction AUI Transceiver SQE Disable function (LXT907 only) Full-Duplex Capable (20 Mbps) Programmable Impedance Driver (LXT901 only) Diagnostic Features Power-Down Mode and four loopback modes Four LED Drivers LXT901 available in 64-pin LQFP and 44- AUI/RJ-45 Loopback pin PLCC Remote Signaling of Link-Down and LXT907 available in 44-pin PLCC Jabber conditions For technical assistance on this product, please call 1-800-628-8686, Order Number: 249097-002 or send an e-mail to support mailbox.intel.com. June 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 Intels 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 markedreserve orundefined 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 1-800-548-4725 or by visiting Intels website at