CS80C286-20

Microprocessors Overview

The Intersil CS80C286-20 is a high-performance static CMOS microprocessor, serving as the CMOS equivalent of the NMOS 80286. It features a maximum clock rate of 20 MHz and supports up to 19 times the throughput of a standard 5 MHz 8086. The device includes integrated memory management capabilities, mapping one gigabyte of virtual address space per task into 16 megabytes of physical memory. It operates with a maximum supply current of 310 mA and provides two upward-compatible operating modes: Real Address Mode and Protected Virtual Address Mode (PVAM).

Microprocessors Feature Summary

• Static CMOS design optimized for low power operation.
• Integrated memory management supporting virtual memory and OS isolation.
• Four-level memory protection for program and data privacy.
• Compatible with the 80287 numeric data co-processor.

Microprocessors Applications

• Multiple user systems requiring task isolation.
• Multi-tasking environments utilizing virtual memory.
• Applications demanding high bandwidth bus interfaces.

Microprocessors Procurement Notes

Verify the specific suffix designation against official Intersil documentation to confirm voltage ranges and temperature grades. Ensure compatibility with existing system buses and co-processors before integration. Confirm package availability matches the required pin configuration for your hardware design.

Microprocessors Selection Notes

Select this component when upgrading from NMOS 80286 designs to reduce power consumption while maintaining performance. Consider the 20 MHz speed grade if higher throughput than the 12.5 MHz variant is required but lower power than the 25 MHz version is preferred. Verify support for PVAM mode if advanced memory protection is necessary.

Microprocessors Part Context

This part belongs to the Intersil 80C286 family of microprocessors. It shares architectural similarities with other variants like the CS80C286-12 and CS80C286-25, differing primarily in clock speed and associated power consumption characteristics. It is designed to be compatible with the broader 80286 ecosystem.

Microprocessors Replacement Considerations

Direct replacements include other 80C286 variants such as the CS80C286-12 or CS80C286-25, provided the clock frequency requirements align with the system design. Ensure that thermal management strategies are adjusted according to the different maximum supply currents of potential substitutes.