CS82C55A-5Z96

Overview

The CS82C55A-5Z96 is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It serves as a high-performance, static CMOS version of the industry-standard 8255A, utilizing a self-aligned silicon gate process. The device provides 24 programmable I/O pins organized into three ports (A, B, and C), which can be individually configured in two groups of twelve. It supports multiple modes of operation including basic input/output, strobed input/output, and bidirectional bus transfer. The component operates with a supply voltage range of 4.5V to 5.5V and features TTL compatibility across its full operating temperature range.

Feature Summary

• Fully compatible with NMOS 8255A pinouts while offering enhanced performance through static CMOS design.
• Supports direct bit set/reset capability for individual port control without requiring read-modify-write cycles.
• Eliminates the need for external pull-up resistors due to integrated bus hold circuitry and TTL compatibility.
• Enables high-speed, no-wait-state operation suitable for integration with 80C86 and 80C88 microprocessors.

Applications

• General-purpose programmable I/O expansion for microprocessor-based systems
• Interfacing with peripheral devices in industrial control environments
• Data acquisition systems requiring configurable parallel input/output channels

Procurement Notes

Verify the specific suffix Z96 against official Renesas documentation to confirm package type and moisture sensitivity level details. Confirm end-of-life status and availability through authorized distributors, as this component series may have discontinuation notifications. Ensure compliance with RoHS requirements and check for any recent product change notices affecting packaging or assembly origin.

Selection Notes

Select this component when a drop-in replacement for the 8255A is required with lower power consumption and higher speed capabilities. Ensure the system design accommodates the 4.5V to 5.5V supply voltage range and utilizes surface-mount mounting if the MQFP package is specified. Verify that the application does not require interrupt outputs, as standard configurations may vary in this feature availability.

Part Context

This part belongs to the 82C55A series of programmable peripheral interfaces. It is derived from the legacy Intel 8255A but implemented using advanced CMOS technology for improved power efficiency and performance. The series is widely recognized for its versatility in embedded systems and industrial automation applications requiring flexible parallel I/O management.

Replacement Considerations

The IQ82C55AZ is a documented alternative within the same family, offering similar functionality in a different package configuration. Verify pin compatibility and electrical specifications before substitution. Other variants such as CS82C55A-5Z provide comparable performance in PLCC packages.