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Twisted Pair Interface
for 100Base-TX Local Area Networks
Overview 100Base–TX is a LAN standard under IEEE auspices. The twisted pair cable connecting two stations can be up to 100 meters in length. Users are encouraged to refer to the pertinent IEEE 802.3 standard documents for further information. Introduction The MC68833 Twisted Pair Interface Chip (TPIC) is a transceiver capable of transmitting and receiving MLT3 encoded datastreams, as well as handling clock and data recovery. The TPIC implements the lower portion of the physical layer (PHY) functions of the Fast Ethernet standard and, with its Auto Negotiation Fast Link Pulse “Pass Through” capability, is well suited for 100Base–TX applications. It performs a five–bit parallel to serial conversion during transmission, as well as a five–bit serial to parallel conversion during reception.
