IQ82C55AZ96

Overview

The IQ82C55AZ96 is a CMOS Programmable Peripheral Interface (PPI) manufactured by Renesas Electronics Corporation, belonging to the 82C55A series. It provides 24 programmable I/O pins organized into three ports, supporting parallel interface expansion for microprocessor systems. The device operates on a single 5V supply with a voltage range of 4.5V to 5.5V and supports clock frequencies up to 8MHz. Designed for industrial environments, it functions within a temperature range of -40°C to +85°C. The component is housed in a 44-pin MQFP surface-mount package and features TTL compatibility with low standby power consumption.

Feature Summary

• Fully compatible with industry-standard NMOS 8255A pinouts while offering enhanced CMOS performance characteristics.
• Supports direct bit set/reset capability and enhanced control word read functionality for flexible I/O management.
• Utilizes advanced SAJI process technology to achieve high-speed operation without wait states alongside low power dissipation.

Applications

• Industrial automation systems requiring robust parallel I/O expansion under harsh environmental conditions.
• Embedded controllers interfacing with 80C86 or 80C88 microprocessors in data acquisition setups.
• General-purpose peripheral interface modules in commercial instrumentation and test equipment.

Procurement Notes

This component is designated as an End-of-Life product with discontinued manufacturing status. Availability is restricted to remaining stock from authorized distributors or secondary markets. Buyers must verify authenticity through official channels due to potential obsolescence risks. Supply chain continuity cannot be guaranteed, and alternative sourcing strategies should be evaluated for long-term production needs.

Selection Notes

Engineers selecting this part should consider its industrial temperature rating and specific MQFP packaging constraints during PCB layout. Verify that system requirements align with the 8MHz maximum clock speed and 2.5mA drive capability per port. Since the device is obsolete, assess lifecycle implications for future maintenance and ensure sufficient inventory reserves are secured before implementation in new designs.

Part Context

The IQ82C55AZ96 is part of the broader 82C55A family of programmable interface chips originally developed by Intersil and now produced by Renesas. This series serves as a bridge between microprocessors and external peripherals, enabling versatile input/output configurations. The 'IQ' suffix typically denotes specific industrial-grade variants within the lineup, distinguishing them from commercial or military counterparts based on temperature and reliability specifications.

Replacement Considerations

Direct functional substitutes include other 82C55A-compatible CMOS PPIs from various manufacturers. For pin-compatible replacements, consider checking current active inventory for similar MQFP packages. Legacy equivalents such as the CS82C55AZ or CMS82C55AZ may offer comparable electrical characteristics but require verification of package dimensions and operating temperature ranges against original design specifications.