GENERAL DESCRIPTION

The MU9C8148 is a Source Routing Transparent (SRT) Interface for the MUSIC Semiconductors MU9C1480 LANCAM for use in Token Ring LAN Bridges and Brouters. This interface operates in accordance with IEEE standards while supporting address filtering rates up to 150,000 frames/sec for minimum-length frames.

DISTINCTIVE CHARACTERISTICS

? Supports High-speed Source Routing or Source Routing Transparent Bridging for up to eight ports

? Glue-free operation with the MUSIC MU9C1480 LANCAM and Texas Instruments’ Token Ring chip set

? Configurable for either Motorola or Intel processor addressing modes

? Complies with the IEEE standards for 4 and 16 Mb/s Token Ring

? Contains a 128-entry Instruction Buffer that holds up to seven down-loadable filtering and purging routines, which can be automatically or directly invoked

? Automatically selects Source Routed or Transparent filtering routines based on Transceiver output data, and supplies the proper Match, Fail, or Flush signals to the MAC chips

? Built-in arbitration allows two MU9C8148s to share a central LANCAM database

? Selectable filtering options for each frame type

? Frame validity is checked on all Routing Information Fields

? Manufactured in CMOS technology

? Available in 68-pin PLCC package and 80-pin TQFP package