AM79C873 Datasheet PDF | Advanced Micro Devices

Advanced Micro Devices AM79C873

The NetPHY-1 device is a physical-layer, single-chip, low-power transceiver for 100BASE-TX, 100BASE-FX, and 10BASE-T operations. The NetPHY-1 device uses a low-power, high-performance CMOS process.

Part No.	AM79C873
Datasheet	AM79C873 Download
Manufacturer	Advanced Micro Devices
Description	NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
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GENERAL DESCRIPTION

On the media side, it provides a direct interface to Fiber Media for 100BASE-FX Fast Ethernet, Unshielded Twisted Pair Category 5 Cable (UTP5) for 100BASE-TX Fast Ethernet, or UTP5/UTP3 Cable for 10BASE-T Ethernet. Through the IEEE 802.3u Media Independent Interface (MII), the NetPHY-1 device connects to the Medium Access Control (MAC) layer, ensuring a high interoperability among products from different vendors. It contains the entire physical layer functions of 100BASE-FX and 100BASE-TX as deﬁned by the IEEE 802.3u standard, including the Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA), 100BASE-TX Twisted Pair Physical Medium Dependent (TP-PMD) sublayer, and a 10BASE-T Encoder/Decoder (ENDEC). The NetPHY-1 device provides strong support for the Auto-Negotiation function utilizing automatic media speed and protocol selection. The NetPHY-1 device incorporates an internal wave-shaping ﬁlter to control rise/fall time, eliminating the need for external ﬁltering on the 10/100 Mbps signals.