Datasheet Details
| Part number | AM79C989 |
|---|---|
| Manufacturer | Advanced Micro Devices |
| File Size | 198.43 KB |
| Description | Quad Ethernet Switching Transceiver |
| Download | AM79C989 Download (PDF) |
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| Part number | AM79C989 |
|---|---|
| Manufacturer | Advanced Micro Devices |
| File Size | 198.43 KB |
| Description | Quad Ethernet Switching Transceiver |
| Download | AM79C989 Download (PDF) |
|
|
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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.
If the AUI p o rt i s u s e d fo r a 1 0 B A S E - 2 , 1 0 B A S E - 5 , o r 10BASE-FL transceiver, one of the four 10BASE-T ports is disabled.
The QuEST device is designed for 10 Mbps Ethernet switching hubs, port switching repeater hubs, routers, bridges, and servers that require data encoding and clock recovery on a per port basis and are limited by pin constraints.
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 accommodate lines longer than 100 meters s Quad AMD Switching Interface (QuASI™) interface reduces overall pin count s Half-Duplex and Full-Duplex operation s Auto-Negotiation compliant with IEEE 802.3u Standard s Standard MII management interface and protocol s Status Change Interrupt output pin for fast response time to changed conditions s 44-pin PLCC CMOS device s 5 V supply with 3.
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