Intel LXT914 Flexible Quad Ethernet Repeater Datasheet The Intel LXT914 Flexible Quad Ethernet Repeater (called hereafter the LXT914 Repeater) is an integrated multi-port repeater designed for mixed-media networks. It provides all the active circuitry required for the repeater function in a single CMOS device. It includes one Attachment Unit Interface (AUI) port and four 10BASE-T transceivers. The AUI port is mode selectable: DTE mode allows connection of an external transceiver (10BASE2, 10BASE5, 10BASE-T or FOIRL) or a drop cable. MAU mode creates a MAU output allowing direct connection to another DTE interface. The 10BASE-T transceivers are entirely self-contained with internal filters which simplify the design work required for FCC-compliant EMI performance. An inter-repeater backplane interface allows 128 or more 10BASE-T ports to be cascaded together. In addition, a serial port provides information for network management. The LXT914 Repeater requires only a single 5-volt power supply due to an advanced CMOS fabrication process. Product Features Four integrated 10BASE-T transceivers Synchronous or asynchronous inter- and one AUI transceiver on a single chip repeater backplane supports hot swapping Programmable DTE/MAU interface on AUI port Inter-repeater backplane allows cascaded repeaters, linking 128 or more 10BASE-T Seven integrated LED drivers with four ports unique operational modes Serial port for selecting programmable On-chip transmit and receive filtering options Automatic partitioning of faulty ports, 68-pin PLCC (Commercial or Extended enabled on an individual port basis temp range) Automatic polarity detection and correction 100-pin PQFP (Commercial temp range) Programmable squelch level allows extended range in low-noise environments Applications LAN Repeaters Switched Repeater Clusters Integrated Repeaters Order Number: 248989, Revision: 003 31-Oct-2005Legal Lines and Disclaimers 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, life sustaining, critical control or safety systems, or in nuclear facility applications. Intel may make changes to specifications and product descriptions at any time, without notice. Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other intellectual property rights. The Intel LXT914 Flexible Quad Ethernet Repeater 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 order number and are referenced in this document, or other Intel literature may be obtained by calling 1-800-548-4725 or by visiting Intel s website at