CS82C59A-5

Specialized Overview

The Harris CS82C59A-5 is a high-performance CMOS Priority Interrupt Controller manufactured using an advanced 2µm CMOS process. It is designed to relieve the system CPU from polling tasks in multilevel priority systems. The device supports up to eight vectored priority interrupting sources and is cascadable to 64 without additional logic. It features industry-standard configuration compatible with microprocessors such as the 80C286, 80286, 80C86/88, 8086/88, 8080/85, and NSC800. The component operates within a supply voltage range of 4.5 V to 5.5 V, with a nominal voltage of 5 V. It utilizes a 28-pin Plastic Quad Chip Carrier (PQCC) package.

Specialized Feature Summary

• Provides hardware-managed priority resolution for multiple interrupt sources, eliminating the need for software polling by the central processor.
• Supports cascading configurations to expand interrupt handling capabilities up to 64 sources without requiring external logic components.
• Ensures compatibility with standard 8-bit and 16-bit microprocessor architectures through industry-standard interface timing and control signals.

Specialized Applications

• Multilevel priority interrupt management in 8086/88 and 80286-based computer systems.
• Peripheral interrupt handling in industrial control systems utilizing 80C86 or 80C286 processors.
• Legacy system integration requiring compatibility with 8080/85 and NSC800 architectures.

Specialized Procurement Notes

Verify the specific manufacturer source, as this part number may be distributed by entities other than the original designer. Confirm that the PQCC28 package matches the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final assembly. Check for any lead-free or RoHS compliance status if required by local regulations, noting that older CMOS variants may not meet current standards.

Specialized Selection Notes

Select this component when designing systems based on Intel 8086-family or compatible microprocessors requiring dedicated hardware interrupt management. The choice depends on the need for a 28-pin surface-mount solution over through-hole alternatives like the PDIP variant. Consider the 2µm CMOS process characteristics for power consumption and speed relative to the system clock frequency. Verify pinout compatibility if replacing legacy DIP versions in existing designs.

Specialized Part Context

The 82C59A is a widely recognized interrupt controller architecture originally developed for early IBM PC compatibles. Harris Corporation produced CMOS versions of this controller to offer improved power efficiency and performance compared to earlier bipolar implementations. The CS82C59A-5 specifically denotes the commercial grade version in a quad chip carrier package, serving as a bridge between legacy through-hole designs and modern surface-mount manufacturing processes.

Specialized Replacement Considerations

The CP82C59A-5 serves as a functional equivalent in a PDIP28 package. The MR82C59A/883 offers a ceramic QCC28 variant with extended military temperature ranges. Verify electrical compatibility before substituting these packages.