MB86961A

The MB86961A Universal Interface for 10BASE-T (Twisted-Pair) Ethernet is fully compliant with the IEEE 802.3 specifications for AUI (Attachment Unit Interface) and 10BASE-T (Twisted-Pair) interfaces and provides the electrical interface between an Ethernet controller and the DB15 (AUI) and RJ45 (10BASE-T) connections to an Ethernet local area network. Functions provided by the MB86961A include Manchester encoding and decoding of the serial data stream, level conversion, collision detection, signal quality error (SQE) and link integrity testing, jabber control, loopback, and automatic correction of polarity reversal on the twisted-pair input.

Pulse shaping and filtering functions are performed by the MB86961A to eliminate the need for external filtering components and thus reduce overall system cost. The device also provides outputs for receive, transmit, collision and link test LEDs and provides compatibility with both shielded and unshielded twisted pair cables. The receive threshold can be reduced to allow an extended range between nodes in low noise environments. Its wide range of features and its ability to interface to virtually all popular controllers make the MB86961A the ideal device for twisted pair Ethernet applications.

The MB86961A is part of a complete family of Ethernet devices available from Fujitsu. It is fabricated in a lowpower CMOS technology and is supplied in a 44-pin PLCC and 48-pin PQFP packages.