DP83905AVQB

Controllers Overview

The DP83905AVQB is a CMOS VLSI device designed for implementing CSMA/CD local area networks. It integrates the entire bus interface for PC-AT ISA systems, supporting software compatibility with NE2000 and Ethercard PLUS16 standards. The controller provides Ethernet Media Access Control (MAC), Encode-Decode (ENDEC) with an AUI interface, and a 10BASE-T transceiver compliant with IEEE 802.3. It operates on a single 5V supply and supports network interfaces including 10BASE5, 10BASE2 via external transceivers, and Twisted-pair Ethernet (10BASE-T). The device features selectable buffer memory sizes and configurable bus modes.

Controllers Feature Summary

• Integrated solution combining controller, ENDEC, and 10BASE-T transceiver functions
• Hardware and software selectable options for NE2000 or Ethercard PLUS16 compatibility
• Supports full IEEE 802.3 AUI interface and twisted-pair physical layer
• Configurable shared memory and I/O port architectures for flexible system integration

Controllers Applications

• Implementation of CSMA/CD local area networks
• PC-AT ISA bus based network adapter cards
• Twisted-pair Ethernet (10BASE-T) interface controllers

Controllers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the 160-PQFP specification. Review datasheet revision history for any preliminary status updates or electrical characteristic changes prior to final design qualification.

Controllers Selection Notes

Select this component for designs requiring integrated MAC and PHY functionality within an ISA bus architecture. Ensure the host system supports the required 5V logic levels and address decoding schemes. Evaluate memory configuration requirements against the available shared memory and I/O port modes to optimize board space and cost.

Controllers Part Context

This part belongs to the AT/LANTIC family of Ethernet controllers developed by National Semiconductor, now Texas Instruments. It serves as a bridge between legacy ISA bus systems and Ethernet media, consolidating multiple discrete components into a single CMOS VLSI chip to reduce board complexity.

Controllers Replacement Considerations

DP83905AVQ