IS82C59A

Specialized Overview

The IS82C59A is a high-performance CMOS Priority Interrupt Controller manufactured using an advanced 2µm CMOS process. Designed to relieve system CPUs from polling tasks in multilevel priority systems, it handles up to eight vectored priority interrupting sources and is cascadable to 64 without additional circuitry. The device features individual request mask capability and fully static design for low power operation. It operates on a single 5V supply with commercial temperature range support.

Specialized Feature Summary

• Compatible with 80C86, 80C88, 80C286, 8080, 8085, 8086, 8088, 80286, and NSC800 microprocessors
• Supports eight-level priority control expandable to 64 levels via cascading
• Fully TTL compatible with low standby power consumption

Specialized Applications

• Multilevel priority interrupt systems in microprocessor-based computers
• Peripheral interrupt management for 8086/88 and 80286 architectures
• Industrial control systems requiring programmable interrupt modes

Specialized Procurement Notes

Verify component authenticity through authorized Renesas distributors or certified secondary market suppliers. Check for RoHS compliance status as legacy variants may differ. Confirm package integrity and moisture sensitivity level handling requirements before assembly. Review datasheet revision history for any functional updates or pinout changes relative to original NMOS equivalents.

Specialized Selection Notes

Select the IS82C59A when designing systems requiring compatibility with Intel 8086/88 or 80286 families while needing lower power consumption than NMOS alternatives. Ensure voltage levels match the 5V single-supply requirement. Consider thermal dissipation needs based on the maximum operating current specifications provided in the electrical characteristics section of the official datasheet.

Specialized Part Context

The IS82C59A belongs to the Intersil/Renesas 82C series of CMOS peripheral controllers. It serves as the CMOS equivalent to the NMOS 8259A, offering improved performance and reduced power usage. This component is part of a broader family including the 82C55A I/O expander, designed for legacy x86 architecture maintenance and industrial retrofits.

Specialized Replacement Considerations

Direct pin-compatible replacements include the NMOS 8259A for basic functionality, though power characteristics will differ. Other CMOS variants within the 82C59A family may offer different speed grades or temperature ranges. Verify that any substitute maintains the same interrupt vectoring logic and initialization command word structure.