CS80C286-12

Microprocessors Overview

The Harris CS80C286-12 is a high-performance static CMOS microprocessor, serving as the CMOS equivalent of the NMOS 80286. It features a maximum clock frequency of 12.5 MHz and supports a 16-bit external data bus with a 24-bit address bus. The device provides up to 16 megabytes of physical memory addressing and one gigabyte of virtual address space per task. It operates within a commercial temperature range and is available in 68-pin PGA or PLCC packages.

Microprocessors Feature Summary

• Static CMOS design optimized for low power consumption
• Integrated memory management and four-level protection
• Supports virtual memory and multi-tasking operating systems
• Compatible with 80287 numeric data co-processor

Microprocessors Applications

• Multiple user system architectures
• Multi-tasking environments requiring process isolation
• Systems utilizing virtual memory mapping
• Applications demanding program and data privacy

Microprocessors Procurement Notes

Verify the specific package type (PGA or PLCC) and suffix codes against official datasheets, as these determine pinout and thermal characteristics. Confirm that the 12.5 MHz speed grade matches system timing requirements. Ensure compatibility with existing 80286-based board designs regarding voltage levels and signal integrity.

Microprocessors Selection Notes

Select this component when upgrading from NMOS 80286 to reduce power dissipation while maintaining functional compatibility. Consider the 12.5 MHz performance tier if higher speeds like 16 MHz or 20 MHz are unnecessary for the application. Evaluate package availability based on PCB footprint constraints between PGA and PLCC options.

Microprocessors Part Context

This part belongs to the Intersil/Harris 80C286 family of advanced microprocessors. It is designed to provide enhanced throughput compared to standard 8086 processors while supporting complex operating systems through hardware-enforced memory protection and management capabilities.

Microprocessors Replacement Considerations

Direct substitutes include other 80C286 variants such as the 80C286-16, 80C286-20, and 80C286-25, which offer higher clock speeds but share the same instruction set and pinout.