DP83891 Gig PHYTERTM 10/100/1000M
2000 National Semiconductor Corporation
www.national.com
Subject to change
Last Modified: 1/27/00 REVISION 0.0
Advance Information
January 2000
DP83891 Gig PHYTER
TM
10/100/1000M
General Description
The DP83891 is the first fully integrated, feature rich Physi-
cal Layer transceiver with integrated PMD sublayers to sup-
port 10BASE-T,100BASE-TX and 1000BASE-T Ethernet
protocols.
It operates on existing CAT5 cables which
reduces deployment costs.
The DP83891 is designed for easy implementation of
10/100/1000 Mb/s Ethernet LANs. It interfaces directly to
Twisted Pair media via an external standard Quad trans-
former. The DP83891 connects to the MAC layer through
the IEEE 802.3u Standard Media Independent Interface
(MII) or the IEEE 802.3z Gigabit Media Independent Inter-
face (GMII).
Applications
The DP83891 fits applications in:
s
10/100/1000 Mb/s capable node cards
s
Switches with 10/100/1000 Mb/s capable ports
s
High speed uplink ports (backbone)
s
High end workstations
System Diagram
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
ETHERNET
DP83891
ETHERNET PHYSICAL LAYER
STATUS
LED
MA
GNETICS
RJ-45
100BASE-TX
MII/GMII
MAC
100BASE-TX
CLOCK
125 MH
1000BASE-T
or
1000BASE-T
z
s
or
10/100/1000
10/100/1000 Mb/s
10BASE-T,
10BASE-T,
Features
s
Fully integrated 10BASE-T,100BASE-TX and
1000BASE-T capable
s
Single Quad TX-Transformer interface for all speeds
s
Fully compliant to IEEE 802.3u 100BASE-TX and IEEE
802.3z/ab 1000BASE-T specifications. Fully integrated
and fully compliant ANSI X3.T12 PMD physical sublayer
that includes adaptive equalization and Baseline Wan-
der compensation.
s
Supports Auto-MDIX
s
IEEE 802.3u Auto-Negotiation and Parallel Detection
Fully auto-negotiates between 10, 100 and 1000 Mb/s
full duplex and half duplex devices
s
3.3 V MAC interfaces:
IEEE 802.3u MII
IEEE 802.3z GMII
s
LED support (Link, Speed, Activity, Duplex, Collision,
Auto-Negotiation, TX and RX indications)
s
Management Register Set (MDIO and MDC)
s
Single 3.3 V power supply
5 V tolerant I/Os
s
208-pin PQFP package
DP83891 Gig PHYTERTM 10/100/1000M
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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