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 |
| • | Flexible MII Port Assignment |
| • | 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 |
| • | IEEE 802.3u 100BASE-FX Fiber Interface |
| • | IEEE 1149.1 JTAG |
| • | 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) |
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 DP83849IF is a highly reliable, feature rich device perfectly suited for industrial applications enabling Ethernet on
the factory floor. The DP83849IF features two fully independent 10/100 ports for multi-port applications. NATIONAL’s 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 DP83849IF provides optimum flexibility in MPU selection by supporting both MII and RMII interfaces. The device also provides
flexibility by supporting both copper and fiber media. 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 DP83849IF, 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.
Applications
| • | Medical Instrumentation |
| • | Factory Automation |
| • | Motor & Motion Control |
| • | Wireless Remote Base Station |
| • | General Embedded Applications |
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