IMQ82C55AZ96

Overview

The IMQ82C55AZ96 is a CMOS Programmable Peripheral Interface (PPI) manufactured by Renesas Electronics Corporation. It serves as a high-performance, static CMOS version of the industry-standard NMOS 8255A. The device features 24 programmable I/O pins organized into three 8-bit ports (Port A, Port B, and Port C), which can be configured in two groups of 12 bits. It supports direct bit set/reset capability and enhanced control word read functionality. Designed for TTL compatibility, it operates with a supply voltage range of 4.5V to 5.5V and offers low standby power consumption of 10µA. The component utilizes a self-aligned silicon gate CMOS process.

Feature Summary

• Provides 24 individually programmable I/O pins configurable in two groups of 12.
• Ensures full TTL compatibility across operating temperatures without requiring external pull-up resistors due to bus hold circuitry.
• Delivers high-speed operation compatible with 80C86 and 80C88 microprocessors without wait states.
• Features low standby power consumption achieved through static CMOS design.

Applications

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

Procurement Notes

Verify current availability status directly with authorized distributors or the manufacturer, as specific suffixes may indicate end-of-life or limited stock conditions. Confirm moisture sensitivity level and packaging requirements prior to ordering to ensure compliance with storage and reflow specifications.

Selection Notes

Select this component when a pin-compatible replacement for the NMOS 8255A is required with lower power consumption. Ensure the application environment supports the specified voltage range and temperature limits. Verify that the system does not require interrupt outputs, as this variant lacks interrupt generation capabilities.

Part Context

This part belongs to the 82C55A series of programmable peripheral interfaces. It is functionally equivalent to the Intel 8255A but manufactured using advanced CMOS technology for improved power efficiency and performance. The series is widely used in legacy and industrial computing systems requiring parallel I/O expansion.

Replacement Considerations

The IMQ82C55AZ96 is pin-compatible with the NMOS 8255A. Other variants within the 82C55A family, such as those in PLCC or DIP packages, may serve as functional substitutes if package differences are accommodated. Verify temperature ranges and drive capabilities when cross-referencing with other manufacturers' CMOS PPIs.