DP83891 Datasheet | National Semiconductor

Description Features .. The DP83891 is the first fully integrated, feature rich Physi- s Fully integrated 10BASE-T,100BASE-TX and cal Layer transceiver with integrated PMD sublayers to sup1000BASE-T capable port 10BASE-T,100BASE-TX and 1000BASE-T Ethernet s Single Quad TX-Transformer interface for all speeds protocols. It operates on existing CAT5 cables which s Fully pliant to IEEE 802.3u 100BASE-TX and IEEE reduces deployment costs. 802.3z/ab 1000BASE-T specifications. Fully integrated The DP83891 is designed for easy implementation of and fully pliant ANSI X3.T12 PMD physical sublayer 10/100/1000 Mb/s Ethernet LANs. It interfaces directly to that includes adaptive equalization and Baseline Wan Twisted Pair media via an external standard Quad transder pensation. former. The DP83891 connects to the MAC layer through s Supports Auto-MDIX the IEEE 802.3u Standard Media Independent Interface (MII) or the IEEE 802.3z Gigabit Media Independent Inter- s IEEE 802.3u Auto-Negotiation and Parallel Detection face (GMII). - Fully auto-negotiates between 10, 100 and 1000 Mb/s full duplex and half duplex devices Applications s 3.3 V MAC interfaces: - IEEE 802.3u MII The DP83891 fits applications in: - IEEE 802.3z GMII s 10/100/1000 Mb/s capable node cards s LED support (Link, Speed, Activity, Duplex, Collision, s Switches with 10/100/1000 Mb/s capable ports Auto-Negotiation, TX and RX indications) s High speed uplink ports (backbone) s Management Register Set (MDIO and MDC) s High end workstations s Single 3.3 V power supply - 5 V tolerant I/Os s 208-pin PQFP package System Diagram 10/100/1000 ETHERNET MAC DP83891 10/100/1000 Mb/s ETHERNET PHYSICAL LAYER 125 MH z CLOCK STATUS LED s TRI-STATE® is a registered trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation Subject to change MAGNETICS MII/GMII 10BASE-T, 100BASE-TX or 1000BASE-T 10BASE-T, 100BASE-TX or RJ-45 1000BASE-T .national. Last Modified: 1/27/00 REVISION 0.0 DP83891 Gig...