MX98741

INDEX www.DataSheet4U.com MX98741 XRC 100 BASE-TX/FX REPEATER CONTROLLER 1.0 FEATURES Eight 100 BASE-TX/FX ports; each port individually configurable to TX or FX Direct interface with analog clock generation/recovery chips Three Media Independent Interface (MII) Expandable to increase number of repeater ports Low latency design simplified high port number Class II repeater implementation Management features accessible through MII or serial ports All ports can be separately isolated or partitioned in reponse to fault conditions Conforms to IEEE 802.3u Repeater Unit Specification LED display for TX/FX port activities and collisions 208-pin, CMOS device in PQFP package 2.0 GENERAL DESCRIPTION The MX98741 (100BASE-TX Repeater Controller, XRC) is a 208-pin PQFP device that interfaces directly with offshell clock generation/recovery chips. Eight ports can be configured as 100 BASE-TX or FX ports individually. Three additional ports have Media Independent Interfaces (MII) which allow easy connection of management and bridge devices. The expansion port allows multiple XRCs to be linked together to form a repeater of high port counts. LEDs are provided for visual monitoring of TX/FX port activities and collisions. The XRC's design inserts minimum delay between the TX/FX ports and the expansion port. A master-slave type arbitration is also implemented to shorten the communciation time among multiple XRCs. As a result, design for Class II stackable hub is greatly s...