CS82C55A96

Overview

The CS82C55A96 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 8-bit ports, supporting parallel interface communication with microprocessors. The device operates on a single 5V supply voltage ranging from 4.5V to 5.5V and supports maximum clock frequencies of 5MHz or 8MHz depending on the specific variant. It features TTL compatibility, interrupt output capability, and direct bit set/reset functionality. The component is housed in a PLCC-44 surface-mount package and is designed for industrial temperature ranges.

Feature Summary

• Fully static CMOS design ensuring low standby power consumption and high-speed operation without wait states.
• Pin-compatible with NMOS 8255A while offering enhanced control word read capabilities and bus hold circuitry.
• Supports three major modes of operation with individually programmable I/O groups and interrupt generation.

Applications

• General-purpose programmable I/O expansion for 80C86 and 80C88 microprocessor systems.
• Industrial control interfaces requiring TTL compatibility and robust noise immunity.
• Embedded systems needing parallel data acquisition and output control with interrupt handling.

Procurement Notes

Verify the exact suffix designation against official Renesas documentation to confirm speed grade and temperature range specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement. Check for end-of-life notifications or discontinuance alerts as this component may be subject to availability constraints.

Selection Notes

Select based on required operating temperature range and maximum clock frequency. Ensure the PLCC-44 package fits the target PCB layout. Verify that the system voltage aligns with the 4.5V to 5.5V operating window. Consider ESD protection requirements if the application environment demands higher than standard tolerance levels.

Part Context

This component is part of the widely adopted 82C55A family of programmable peripheral interfaces. It serves as a CMOS successor to the NMOS 8255A, maintaining functional compatibility while reducing power consumption. The series is commonly used in legacy and modern embedded designs requiring flexible parallel I/O management.

Replacement Considerations

Direct pin-compatible replacements include other variants within the 82C55A family such as IS82C55AZ96 or CS82C55AZ, provided electrical specifications match. Verify package type and speed grade equivalence before substitution.