AM79C961AVI

Overview

The AM79C961AVI is a single-chip Ethernet controller manufactured by Rochester Electronics, LLC. It serves as the industrial standard architecture (ISA) and extended industry standard architecture (EISA) bus interface for PC-AT systems. The device supports IEEE 802.3/ANSI 8802-3 standards and enables full-duplex operation on 10BASE-T, AUI, and GPSI ports. It features individual transmit and receive FIFOs for packet buffering, automatic frame handling, and software compatibility with AMD’s LANCE architecture.

Feature Summary

• Single-chip integration for ISA and EISA bus connectivity
• Supports full-duplex operation across multiple physical layer interfaces
• Includes programmable FIFO buffers for enhanced system latency management
• Provides automated packet processing functions including collision frame deletion

Applications

• PC-AT Industry Standard Architecture (ISA) network interfaces
• Extended Industry Standard Architecture (EISA) bus systems
• Legacy Ethernet controller replacements in industrial computing
• Low-power CMOS applications requiring sleep mode functionality

Procurement Notes

Verify manufacturer attribution carefully, as Rochester Electronics typically distributes surplus or discontinued components originally designed by Advanced Micro Devices. Confirm that the specific suffix denotes package type and temperature range rather than functional changes. Ensure documentation matches the original AMD specifications for register compatibility.

Selection Notes

Select this component when replacing legacy Am79C961 units in existing ISA or EISA designs. Verify pin compatibility with the original jumperless design. Consider power consumption requirements if battery operation is intended, as the CMOS process supports low standby current modes.

Part Context

This part belongs to the PCnet-ISA II family of Ethernet controllers. It is functionally equivalent to the AMD AM79C961A but distributed through Rochester Electronics. The device maintains register and descriptor architecture compatibility with earlier LANCE-based solutions while offering improved integration.

Replacement Considerations

Direct substitute: AM79C961A. Verify pinout compatibility with existing PCB layouts. Ensure software drivers support the LANCE register architecture.