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DP83840A - 10/100 Mb/s Ethernet Physical Layer

General Description

The DP83840A is a Physical Layer device for Ethernet 10BASE-T and 100BASE-X using category 5 Unshielded, Type 1 Shielded and Fiber Optic cables.

This VLSI device is designed for easy implementation of 10/100 Mb/s Ethernet LANs.

Key Features

  • IEEE 802.3 10BASE-T compatible--ENDEC and UTP/ STP transceivers and filters built-in.
  • IEEE 802.3u 100BASE-X compatible--support for 2 pair Category 5 UTP (100m), Type 1 STP and Fiber Optic Transceivers--Connects directly to the DP83223 Twisted Pair Transceiver.
  • ANSI X3T12 TP-PMD compatible.
  • IEEE 802.3u Auto-Negotiation for automatic speed selection.
  • IEEE 802.3u compatible Media Independent Interface (MII) with Serial Management Interface.
  • In.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DP83840A 10/100 Mb/s Ethernet Physical Layer March 1997 DP83840A 10/100 Mb/s Ethernet Physical Layer General Description The DP83840A is a Physical Layer device for Ethernet 10BASE-T and 100BASE-X using category 5 Unshielded, Type 1 Shielded and Fiber Optic cables. This VLSI device is designed for easy implementation of 10/100 Mb/s Ethernet LANs. It interfaces to the PMD sublayer through National Semiconductor's DP83223 Twisted Pair Transceiver, and to the MAC layer through a Media Independent Interface (MII), ensuring interoperability between products from different vendors. The DP83840A is designed with National Semiconductor's BiCMOS process.