AM79C989 Datasheet (Advanced Micro Devices) - Quad Ethernet Switching Transceiver

AM79C989, Quad Ethernet Switching Transceiver

The Am79C989 Quad Ethernet Switching Transceiver (QuEST™) is a four-port physical layer (PHY) device that provides all of the analog functions needed for a 10BASE-T switch, including four independent Manchester Encode/Decode units (MENDECs) and four independent 10BASE-T transceivers.

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PRELIMINARY Am79C989 Quad Ethernet Switching Transceiver (QuEST™) DISTINCTIVE CHARACTERISTICS s Four independent 10BASE-T transceivers compliant with the IEEE 802.3 standard s Four digital Manchester Encode/Decode (MENDEC) units s On-chip ﬁltering enables FCC EMI compliance without external ﬁlters or common mode chokes s Automatic polarity Correction and Detection on 10BASE-T receivers s Optional Attachment Unit Interface (AUI) for non-10BASE-T transceivers s 10BASE-T Extended Distance option a