LTX9863

www.DataSheet4U.com Data Sheet - Preliminary Information MAY 2000 Revision 1.0 LXT9883/LXT9863 Advanced 10/100 Unmanaged Repeater General Description The LXT9883 is an advanced, 3.3V, 8-port 10/100 repeater. The LXT9883 is compatible with previous generations of Level One repeaters from the LXT980 and LXT918 families. Eight ports directly support 100BASETX/10BASE-T copper media. Two additional Media Independent Interface (MII) ports (10/100 Mbps selectable) connect to Media Access Controllers (MACs) for bridge/switch applications. The LXT9863 offers the same features and functionality in a six-port device. This data sheet uses the singular designation “LXT98x3” to refer to both devices. The LXT98x3 provides auto-negotiation with parallel detection for the PHY ports. The LXT98x3 provides two internal repeater state machines—one operating at 10 Mbps and one at 100 Mbps. Once configured, the LXT98x3 automatically connects each port to the appropriate repeater. The LXT98x3 also provides two Inter-Repeater Backplanes (IRBs) for expansion — one operating at 10 Mbps and one at 100 Mbps. Up to 240 twisted-pair and MII ports can logically be combined into one repeater. Features Six or eight 10/100 ports with integrated twisted-pair PHYs including integrated filters. Two 10/100 MIIs for bridging. Independent operation. segments for 10 and 100 Mbps Cascadable Inter-Repeater Backplanes (IRBs), with option for 5V stacking compatibility. Integrated LED drivers with user-sele...