DP83849I

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 DP83849I is a highly reliable, feature rich device perfectly suited for industrial applications enabling Ethernet on the factory floor. The DP83849I features two fully independent 10/100 ports for multi-port applications. NATIONALs unique port switching capability also allows the two ports to be configured to provide fully integrated range extension, media conversion, hardware based failover and port monitoring.

The DP83849I provides optimum flexibility in MPU selection by supporting both MII and RMII interfaces. In additional 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 DP83849IVS, 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.

Design Tools

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Title	Size in Kbytes	Date
Ethernet Integrity Utility Tool for Support and Diagnostics	5 Kbytes	21-Mar-2008	View
DP83849 Reference Designs			View

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Application Notes

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Title	Size in Kbytes	Date
AN-1548: Application Note 1548 PHYTER 100 Base-TX Reference Clock Jitter Tolerance	161 Kbytes	2-Oct-07	Download
AN-1548 (Chinese): Application Note 1548 PHYTER 100 Base-TX Reference Clock Jitter Tolerance	680 Kbytes
AN-1540: Application Note 1540 Power Measurement of Ethernet Physical Layer Products	170 Kbytes	2-Oct-07	Download
AN-1862: Application Note 1862 Reducing Radiated Emissions in Ethernet 10/100 LAN Applications	117 Kbytes	4-Jun-08	Download
AN-1881: Application Note 1881 Improving Electro-Magnetic Noise Immunity in Serial Communications Systems	110 Kbytes	28-Jul-08	Download
AN-1469: Application Note 1469 PHYTER? Design & Layout Guide	341 Kbytes	29-Apr-08	Download
AN-1469 (Chinese): Application Note 1469 PHYTER? Design & Layout Guide	484 Kbytes
AN-1509: Application Note 1509 PhyterDual Flexible Port Switching	233 Kbytes	21-May-07	Download
AN-1509 (Chinese): Application Note 1509 PhyterDual Flexible Port Switching	384 Kbytes
AN-1508: Application Note 1508 DP83849 Cable Diagnostics	796 Kbytes	4-Aug-06	Download
AN-1508 (Chinese): Application Note 1508 DP83849 Cable Diagnostics	524 Kbytes
AN-1507: Application Note 1507 DP83848 and DP83849 100Mb Data Latency	575 Kbytes	4-Aug-06	Download
AN-1507 (Chinese): Application Note 1507 DP83848 and DP83849 100Mb Data Latency	350 Kbytes

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