CS82C55A

Overview

The CS82C55A is a high-performance CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It serves as a general-purpose I/O device compatible with various microprocessors, including the 80C86 and 80C88. The component features 24 programmable I/O pins organized into three major modes of operation. It operates on a single 5V power supply with a voltage range of 4.5 V to 5.5 V. The maximum clock frequency reaches 8 MHz, ensuring high-speed, no wait-state operation. The device utilizes an L7 process for low standby power consumption.

Feature Summary

• Fully TTL compatible with bus hold circuitry eliminating pull-up resistors
• Direct bit set/reset capability for individual pin control
• Enhanced control word read capability for improved system monitoring
• Low standby power consumption with ICCSB of 10µA

Applications

• Peripheral interface for 80C86 and 80C88 microprocessors
• General-purpose programmable I/O expansion in embedded systems
• Industrial control systems requiring parallel I/O management

Procurement Notes

Verify RoHS compliance status and specific ordering suffixes when sourcing. Confirm package type availability, such as PLCC-44 or CERDIP, against design requirements. Check manufacturer documentation for moisture sensitivity levels and handling precautions. Ensure compatibility with existing PCB footprints before procurement.

Selection Notes

Select based on required operating temperature range and package style. Compare performance metrics against legacy NMOS versions if pin compatibility is critical. Evaluate power consumption needs against static CMOS advantages. Verify interrupt output requirements and mode selection capabilities for the target application.

Part Context

The CS82C55A belongs to the 82C55A family of CMOS Programmable Peripheral Interfaces. It is functionally equivalent to the industry-standard NMOS 8255A but offers lower power consumption and higher speed. This component is part of Renesas' portfolio of interface ICs designed for microprocessor-based systems.

Replacement Considerations

The CS82C55A is pin-compatible with the NMOS 8255A. Other variants within the 82C55A family may offer different package options or temperature ranges. Verify electrical specifications and package dimensions when substituting with other manufacturers' equivalents.