IP82C55A

Overview

The IP82C55A is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It provides 24 programmable I/O pins organized into three 8-bit ports (Port A, Port B, and Port C). The device supports parallel interface communication with microprocessors such as the 80C86, 80C88, and 8086/88 families. It operates on a single 5V power supply with a voltage range of 4.5V to 5.5V. The maximum clock frequency is 8 MHz. The component is available in a 40-pin PDIP package with through-hole mounting.

Feature Summary

• CMOS technology ensures low standby power consumption and high-speed operation without wait states.
• Fully TTL compatible across commercial, industrial, and military temperature ranges.
• Supports direct bit set/reset capability for individual pin control.
• Pin-compatible with legacy NMOS 8255A devices for easy migration.

Applications

• General-purpose programmable I/O expansion for 8-bit microprocessor systems.
• Interface between microcontrollers and peripheral devices requiring parallel data transfer.
• Industrial control systems utilizing 80C86 or 80C88 processors.

Procurement Notes

Verify RoHS compliance status carefully, as datasheets indicate variations between lead-free and non-compliant versions. Confirm the specific suffix (e.g., AZ) matches the required package type and temperature rating. Check current lifecycle status, as some variants may be discontinued or subject to production changes. Ensure the ordering quantity aligns with standard tube packaging constraints.

Selection Notes

Select this component when a static CMOS version of the 8255A is required for low-power applications. Ensure the system design accommodates the 40-pin DIP footprint. Verify that the 8 MHz maximum clock speed meets the processor's timing requirements. Consider the -40°C to +85°C operating range for industrial environments.

Part Context

The IP82C55A belongs to the 82C55 family of programmable peripheral interfaces. It serves as the CMOS equivalent to the industry-standard NMOS 8255A. This family is widely used in embedded systems for expanding I/O capabilities. The 'IP' prefix typically denotes a specific package or qualification variant within the Renesas portfolio.

Replacement Considerations

The NMOS 8255A is functionally compatible but consumes more power. Other CMOS variants like the ID82C55A or ISL82C55A offer similar performance with potential differences in package or temperature range. Verify pinout compatibility before substitution.