CS82C55AZ96S2705

Overview

The CS82C55AZ96S2705 is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It serves as a high-performance, low-power alternative to 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). It operates with a supply voltage range of 4.5V to 5.5V and supports clock frequencies up to 8MHz. The component utilizes a self-aligned silicon gate CMOS process to ensure TTL compatibility and low standby power consumption.

Feature Summary

• Fully pin-compatible with the legacy NMOS 8255A for direct replacement in existing designs.
• Provides static CMOS operation ensuring low operating power and minimal standby current.
• Supports direct bit set/reset capability for individual port control without read-modify-write cycles.
• Features enhanced control word read capability and bus hold circuitry to eliminate external pull-up resistors.

Applications

• General-purpose parallel I/O expansion for microprocessor systems.
• Interface solutions for 80C86 and 80C88 microprocessors requiring no wait states.
• Industrial control applications utilizing industrial temperature range components.

Procurement Notes

Verify the specific suffix S2705 against official Renesas documentation to confirm package type and moisture sensitivity level. Confirm end-of-life status and availability through authorized distributors. Ensure compliance with RoHS directives and lead-free annealing requirements specified in the ordering information.

Selection Notes

Select this component when a CMOS upgrade from the 8255A is required for lower power consumption. Ensure the design supports the 4.5V to 5.5V supply voltage range. Verify that the 8MHz maximum clock frequency meets system timing requirements. Check for industrial temperature range needs if operating outside commercial limits.

Part Context

This part belongs to the 82C55A series of programmable peripheral interfaces. It is part of Renesas' portfolio of interface ICs designed for general-purpose I/O expansion. The series includes various package options such as PLCC and MQFP to suit different mounting requirements.

Replacement Considerations

Directly replace NMOS 8255A devices due to pin compatibility. Consider other 82C55A variants like CS82C55AZ or IQ82C55AZ for different package types or temperature ranges. Verify functional equivalence before substituting with non-Renesas equivalents.