NSC DP83891VQM Datasheet

DP83891 Gig PHYTER™ 10/100/1000M

© 2000 National Semiconductor Corporation

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Subject to change Last Modified: 1/27/00 REVISION 0.0

Advance Information

January 2000

DP83891 Gig PHYTER™10/100/1000M

General Description

The DP83891 is the first fully integrated,feature rich Physi­cal Layer transceiverwithintegrated PMD sublayersto sup­port 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 trans­former. 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 Inter­face (GMII).

Applications

The DP83891 fits applications in:

■ 10/100/1000 Mb/s capable node cards

■ Switches with 10/100/1000 Mb/s capable ports

■ High speed uplink ports (backbone)

■ High end workstations

System Diagram

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

ETHERNET

DP83891

ETHERNET PHYSICAL LAYER

STATUS

LED

MAGNETICS

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

■ Fully integrated 10BASE-T,100BASE-TX and
1000BASE-T capable

■ Single Quad TX-Transformer interface for all speeds

■ Fully compliant to IEEE 802.3u 100BASE-TX and IEEE

802.3z/ab 1000BASE-T specifications. Fully integrated
and fully compliantANSI X3.T12 PMD physical sublayer
that includes adaptive equalization and Baseline Wan­der compensation.

■ Supports Auto-MDIX

■ IEEE 802.3u Auto-Negotiation and Parallel Detection

– Fullyauto-negotiatesbetween10,100and1000Mb/s

full duplex and half duplex devices

■ 3.3 V MAC interfaces:
– IEEE 802.3u MII
– IEEE 802.3z GMII

■ LED support (Link, Speed, Activity, Duplex, Collision,
Auto-Negotiation, TX and RX indications)

■ Management Register Set (MDIO and MDC)

■ Single 3.3 V power supply

– 5 V tolerant I/Os

■ 208-pin PQFP package

DP83891 Gig PHYTER™ 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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SEMICONDUCTOR CORPORATION. As used herein:

1.Lifesupportdevicesorsystemsaredevicesorsystems
which,(a)areintendedforsurgicalimplantintothebody,
or (b) support or sustain life, and whose failure to per­form,whenproperlyusedinaccordancewithinstructions
for use provided in the labeling, can be reasonably ex­pected to result in a significant injury to the user.

2.A critical component is any component of a life support
device or system whose failure to perform can be rea­sonablyexpectedtocausethefailureofthelifesupport
device or system, or to affect its safety or effectiveness.

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