Datasheet
DP83843BVJE PHYTER
© 1999 National Semiconductor Corporation
www.national.com
1RY
DP83843BVJE PHYTER
General Description
TheDP83843BVJEisafullfeaturePhysicalLayerdevice
withintegratedPMDsublayerstosupportboth10BASE-T
and 100BASE-X Ethernet protocols.
ThisVLSIdeviceisdesignedforeasyimplementationof
10/100Mb/sEthernetLANs.ItinterfacesdirectlytoTwisted
Pairmediathroughanexternaltransformerortofiber
mediaviaindustrystandardelectrical/opticalfiberPMD
transceivers.Thisdevicealsointerfacesdirectlytothe
MAClayerthroughtheIEEE802.3ustandardMediaInde-
pendentInterface(MII),ensuringinteroperabilitybetween
products from different vendors.
TheDP83843isdesignedwithNationalSemiconductor's
advancedCMOSprocess.Itssystemarchitectureisbased
ontheintegrationofseveralofNational'sindustryproven
core technologies:
—IEEE 802.3 ENDEC with AUI/10BASE-T transceiver
module to provide the 10 Mb/s functions
—ClockRecovery/GeneratorModulesfromNational'sFast
Ethernet and FDDI products
—FDDI Stream Cipher scrambler/descrambler for
TP-PMD
—100BASE-Xphysicalcodingsub-layer(PCS)andcontrol
logicthatintegratesthecoremodulesintoadualspeed
Ethernet physical layer controller
—ANSI X3T12 Compliant TP-PMD Transceiver
technology with Baseline Wander (BLW) compensation
System Diagram
ThunderLAN
®
is a registered trademark of Texas Instruments.
TWISTER™ is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
10 AND/OR 100 Mb/s
ETHERNET MAC OR
100Mb/s REPEATER
DP83843
10/100 Mb/s
ETHERNET PHYSICAL LAYER
STATUS
LEDS
MAGNETICS
RJ-45
10BASE-T
or
100BASE-TX
MII
10BASE-T or
CONTROLLER
100BASE-TX
100BASE-FX/
CLOCK
25 MHz
AUI
Features
—IEEE 802.3 ENDEC with AUI/10BASE-T transceivers
and built-in filters
—IEEE 802.3u 100BASE-TX compatible - directly drives
standard Category 5 UTP, no need for external
100BASE-TX transceiver
—Fully Integrated and fully compliant ANSI X3.263 TP-
PMD physical sublayer which includes adaptive equal-
ization and BLW compensation
—IEEE802.3u100BASE-FXcompatible-connectsdirect-
ly to industry standard Electrical/Optical transceivers
—IEEE 802.3u Auto-Negotiation for automatic speed se-
lection
—IEEE 802.3u compatible Media Independent Interface
(MII) with Serial Management Interface
—Integrated high performance 100 Mb/s clock recovery
circuitry requiring no external filters
—Full Duplex support for 10 and 100 Mb/s data rates
—MII Serial 10 Mb/s mode
—Fully configurable node/switch and 100Mb/s repeater
modes
—Programmableloopbackmodesforflexiblesystemdiag-
nostics
—Flexible LED support
—Single register access to complete PHY status
—MDIO interrupt support
—Individualized scrambler seed for 100BASE-TX applica-
tions using multiple PHYs
—Low power consumption for multi-port applications
—Small footprint 80-pin PQFP package