IQ82C55A96

Overview

The IQ82C55A96 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 (Port A, Port B, and Port C), which can be individually programmed in groups of 12. The device supports parallel interface communication with a maximum clock frequency of 8 MHz and operates on a single 5V supply voltage ranging from 4.5V to 5.5V. It features TTL compatibility, direct bit set/reset capability, and enhanced control word read functionality. The component is housed in a 44-pin MQFP surface-mount package and is rated for industrial temperature operation between -40°C and +85°C.

Feature Summary

• CMOS technology ensures low standby power consumption while maintaining high-speed operation without wait states.
• Fully compatible with industry-standard NMOS 8255A pinouts and offers direct bit set/reset capabilities for individual port control.
• TTL-compatible logic levels eliminate the need for external pull-up resistors across the operating temperature range.

Applications

• General-purpose programmable I/O expansion for microprocessor systems
• Interface solutions for 80C86 and 80C88 microprocessors
• Industrial control applications requiring robust parallel data handling

Procurement Notes

Verify current availability status as this component may be subject to discontinuation or limited stock conditions. Confirm that the specific suffix '96' corresponds to the required industrial temperature grade and MQFP packaging variant before ordering. Cross-reference the manufacturer's latest documentation to ensure compliance with RoHS directives and moisture sensitivity level requirements for your assembly process.

Selection Notes

Select this component when a CMOS-based replacement for the legacy 8255A is required with lower power consumption and higher speed capabilities. Ensure the design accommodates the 44-pin MQFP footprint and 5V logic levels. Verify that the 24 I/O pin count meets the system's peripheral expansion needs and that the 8 MHz maximum clock frequency aligns with the bus timing requirements of the host processor.

Part Context

This part belongs to the widely adopted 82C55A family of programmable peripheral interfaces, originally established as an industry standard for microcomputer I/O expansion. Renesas continues to produce CMOS versions of this architecture to support legacy designs transitioning from NMOS technologies. The IQ prefix typically denotes specific commercial or industrial variants within the broader Intersil/Renesas portfolio.

Replacement Considerations

Functionally equivalent parts include the ID82C55A and CMS82C55A, though package differences exist. For pin-compatible replacements, verify the specific suffix codes against the manufacturer's cross-reference guide to ensure matching electrical characteristics and temperature ranges.