CMP82C55AZ

Overview

The CMP82C55AZ is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It provides 24 programmable I/O pins organized into three ports, compatible with the industry-standard NMOS 8255A. 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. It features TTL compatibility and low standby power consumption. The component is housed in a 44-lead MQFP package and is designed for industrial temperature ranges.

Feature Summary

• Pin-compatible with NMOS 8255A for direct replacement
• High-speed operation without wait states at 8MHz
• Low power static CMOS design with TTL compatibility

Applications

• General-purpose programmable I/O expansion
• Interface with 80C86/80C88 microprocessors
• Industrial control systems requiring parallel I/O

Procurement Notes

Verify the specific suffix 'CMP' against official Renesas documentation to confirm package type and temperature grade. Ensure the source document explicitly lists this part number as active or available. Cross-reference the manufacturer's current product selector tool for the most accurate status and lead time information.

Selection Notes

Select this component when a CMOS upgrade to the 8255A is required for lower power consumption while maintaining pin compatibility. Verify that the 44-lead MQFP package fits the PCB layout constraints. Confirm that the operating temperature range meets the specific application environment requirements.

Part Context

The 82C55A series represents a high-performance CMOS version of the standard 8255A peripheral interface. Manufactured using advanced CMOS processes, these devices offer reduced power dissipation compared to their NMOS predecessors while delivering equivalent or superior performance speeds suitable for modern microprocessor systems.