CS82C50A-5Z96

Overview

The CS82C50A-5Z96 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 individually programmed in two groups of 12 bits. It supports three major modes of operation: Basic Input/Output, Strobe Input/Output, and Bidirectional Bus I/O. The component operates with a single 5V power supply and offers fully TTL-compatible logic levels. It provides direct bit set/reset capability for Port C and enhanced control word read functionality. The specific suffix '96' indicates an industrial temperature range rating.

Feature Summary

• Static CMOS design ensures low standby power consumption while maintaining performance comparable to existing equivalent products.
• Fully TTL compatible over the full operating temperature range, eliminating the need for external pull-up resistors due to bus hold circuitry.
• Provides 24 programmable I/O pins that can be configured into three independent 8-bit ports for flexible system interfacing.
• Supports direct bit set/reset operations on Port C lines, allowing individual control of output signals without affecting other port states.

Applications

• General-purpose parallel interface expansion for microprocessor-based systems
• Industrial control systems requiring robust I/O handling in commercial or industrial environments
• Embedded applications utilizing 80C86, 80C88, or similar microprocessors

Procurement Notes

Verify the exact ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Confirm availability status as older CMOS PPI components may have limited stock or end-of-life implications. Ensure compatibility with existing PCB footprints, specifically checking for MQFP or PLCC package dimensions if replacing legacy parts.

Selection Notes

Select this component when a pin-compatible replacement for the NMOS 8255A is required with lower power consumption. Verify that the system requires only parallel I/O expansion rather than serial communication capabilities. Ensure the application voltage matches the single 5V supply requirement and that the operating temperature range meets the environmental conditions of the target deployment.

Part Context

This part belongs to the 82C55A family of programmable peripheral interfaces. It is functionally equivalent to the Intel 8255A but fabricated using advanced CMOS technology for reduced power dissipation. The CS prefix typically denotes a commercial or industrial grade variant from Renesas/Intersil, distinguishing it from military-grade equivalents like the 82C55AH.

Replacement Considerations

Direct pin-compatible replacements include the 82C55A series from various manufacturers. Verify that substitute parts support the same bidirectional bus mode if required by the design. Check for any differences in control word interpretation or timing characteristics between the original and replacement devices.