General Description

The number of applications requiring Ethernet Connectivity

continues to expand. Along with this

increased market demand is a change in application

requirements. Where single channel Ethernet used to

be sufficient, many applications such as wireless

remote base stations and industrial networking now

require DUAL Port functionality for redundancy or system

management.

The DP83849C is a highly reliable, feature rich device

perfectly suited for commercial or industrial applications

enabling Ethernet on the factory floor. The

DP83849C features two fully independent 10/100 ports

for multi-port applications.

The DP83849C provides optimum flexibility in MPU

selection by supporting both MII and RMII interfaces.

In addition this device includes a powerful new diagnostics

tool to ensure initial network operation and

maintenance. In addition to the TDR scheme, commonly

used for detecting faults during installation,

NATIONAL’s innovative cable diagnostics provides for

real time continuous monitoring of the link quality. This

allows the system designer to implement a fault prediction

mechanism to detect and warn of changing or

deteriorating link conditions.

With the DP83849C, National Semiconductor continues

to build on its Ethernet expertise and leadership

position by providing a powerful combination of features

and flexibility, easing Ethernet implementation for

the system designer.

Features

• Low-power 3.3V, 0.18μm CMOS technology

• Low power consumption <600mW Typical

• 3.3V MAC Interface

• Auto-MDIX for 10/100 Mb/s

• Energy Detection Mode

• Dynamic Integrity Utility

• Dynamic Link Quality Monitoring

• TDR based Cable Diagnostic and Cable Length Detection

• Optimized Latency for Real Time Ethernet Operation

• Reference Clock out

• RMII Rev. 1.2 Interface (configurable)

• SNI Interface (configurable)

• MII Serial Management Interface (MDC and MDIO)

• IEEE 802.3u MII

• IEEE 802.3u Auto-Negotiation and Parallel Detection

• IEEE 802.3u ENDEC, 10BASE-T transceivers and filters

• IEEE 802.3u PCS, 100BASE-TX transceivers and filters

• Integrated ANSI X3.263 compliant TP-PMD physical sub-layer

with adaptive equalization and Baseline Wander compensation

• Programmable LED support for Link, 10 /100 Mb/s Mode, Activity,

Duplex and Collision Detect

• Single register access for complete PHY status

• 10/100 Mb/s packet BIST (Built in Self Test)

• 80-pin TQFP package (12mm x 12mm)

Applications

• Medical Instrumentation

• Factory Automation

• Motor & Motion Control

• Wireless Remote Base Station

• General Embedded Applications