DP83902AV/NOPB

Controllers Overview

The DP83902AV/NOPB is a Serial Network Interface Controller (ST-NIC) for twisted pair Ethernet, integrating MAC, ENDEC, and transceiver functions. It supports 10BASE-T, 10BASE5, and 10BASE2 standards per IEEE 802.3. The device operates on a single 5V supply with a 20 MHz oscillator input. Key electrical parameters include a 16-byte internal FIFO, dual 16-bit DMA channels, and support for physical, multicast, and broadcast address filtering. It features three levels of loopback diagnostics and an AUI interface for external media connection.

Controllers Feature Summary

• Integrates Media Access Control, Encode-Decode, and 10BASE-T transceiver electronics into a single chip solution.
• Provides full AUI interface compatibility for connecting to external transceivers for 10BASE5 and 10BASE2 networks.
• Includes intelligent receive squelch with selectable thresholds for extended cable distance operation.
• Supports dual 16-bit DMA channels and independent system/network clocks for efficient buffer management.

Controllers Applications

• Implementation of 10BASE-T twisted pair local area networks.
• Integration with external transceivers for 10BASE5 (Thick Ethernet) and 10BASE2 (Thin Ethernet) systems.
• Design of network interface cards requiring integrated MAC and PHY functionality.

Controllers Procurement Notes

Verify the specific package variant required, as the AV suffix corresponds to the 100-pin PQFP package. Confirm that the component meets RoHS compliance requirements if applicable to the target assembly process. Ensure the design accounts for the 5V power supply constraints and proper decoupling of analog and digital ground pins as specified in the datasheet.

Controllers Selection Notes

Select this controller when a complete single-chip solution for 10 Mbps Ethernet is needed without separate MAC and PHY components. Consider the 100-pin PQFP package size and pin count during PCB layout. Evaluate the need for AUI isolation if using coaxial media, as CMOS processing requires external isolation for differential signals.

Controllers Part Context

This component belongs to the DP83902 family of Serial Network Interface Controllers developed by National Semiconductor, now part of Texas Instruments. It is designed as a software and hardware compatible successor to earlier DP8390 models, offering enhanced integration of transceiver and encoding functions while maintaining standard bus interfaces for host processors.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and register compatibility if considering alternative controllers from other manufacturers or newer generations within the same product line.