IP82C55AZ

Overview

The IP82C55AZ is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It provides 24 programmable I/O pins organized into three 8-bit ports, functioning as an I/O expander with parallel interface capabilities. The device operates on a single 5V supply within a voltage range of 4.5V to 5.5V and supports clock frequencies up to 8MHz for wait-state-free operation. It utilizes open-drain outputs with a drive capability of 2.5mA per pin. Packaged in a 40-pin Dual In-Line Package (PDIP) with a 0.600-inch width, it is designed for through-hole mounting and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Static CMOS design ensures low standby power consumption while maintaining full TTL compatibility without requiring external pull-up resistors.
• Offers direct bit set/reset capability and enhanced control word read functionality for flexible system configuration.
• Pin-compatible with NMOS 8255A devices, allowing for straightforward upgrades in existing designs.

Applications

• General-purpose programmable I/O expansion for microprocessor systems
• Interfacing with 80C86, 80C88, and compatible microprocessors
• Industrial control applications requiring robust I/O handling

Procurement Notes

Verify the specific ordering suffix and package type against current manufacturer documentation, as component availability may vary. Confirm RoHS compliance status and moisture sensitivity levels prior to integration. Check for any Product Change Notifications or End-of-Life announcements that might affect long-term supply stability.

Selection Notes

Select this component when a static CMOS replacement for the NMOS 8255A is required with lower power consumption. Ensure the design accommodates the 40-PDIP through-hole form factor and 2.5mA output drive limits. Verify that the system voltage remains within the 4.5V to 5.5V range for proper operation.

Part Context

The IP82C55AZ belongs to the 82C55A family of high-performance CMOS Programmable Peripheral Interfaces. This series is designed to provide general-purpose I/O expansion for various microprocessors, offering industry-standard configuration with improved performance characteristics over older NMOS versions.

Replacement Considerations

The IP82C55AZ is functionally pin-compatible with the NMOS 8255A. Other variants in the 82C55A family, such as IS82C55AZ or ID82C55A, offer different package options like PLCC or CDIP but maintain similar electrical characteristics.