IS82C55A-5

Overview

The Renesas IS82C55A-5 is a CMOS Programmable Peripheral Interface (PPI) featuring 24 programmable I/O pins organized into three 8-bit ports. It operates within a voltage range of 4.5V to 5.5V and supports parallel connection interfaces. The device provides a drive capability of 2.5mA per output pin with open-drain output types. Designed for high-speed operation, it functions up to 5MHz without wait states on compatible microprocessors. The component is housed in a 44-pin PLCC package suitable for surface mount installation and maintains an operating temperature range from -40°C to +85°C.

Feature Summary

• Static CMOS design ensures low standby power consumption while maintaining full TTL compatibility across the operating temperature range.
• Direct bit set/reset capability allows individual control of port bits without affecting other lines in the same port.
• Enhanced control word read capability facilitates accurate status monitoring during system initialization and operation.

Applications

• Compatible with 80C86, 80C88, and 80C286 microprocessor systems requiring general-purpose I/O expansion.
• Industrial control environments utilizing legacy NMOS 8255A configurations where CMOS performance improvements are required.
• Embedded systems needing direct bit manipulation for peripheral interfacing without additional logic gates.

Procurement Notes

Verify RoHS compliance status carefully as lead-free availability varies by specific manufacturing lot and ordering suffix. Confirm moisture sensitivity level (MSL 3) handling requirements during storage and assembly. Ensure the selected package variant matches the target PCB footprint dimensions and pitch specifications precisely.

Selection Notes

Select this component when replacing NMOS 8255A devices to achieve lower power consumption without altering pinout or software architecture. Verify that the system bus speed does not exceed the 5MHz limit for wait-state-free operation. Consider the 2.5mA drive strength limitations when connecting to high-capacitance loads or multiple inputs.

Part Context

This part belongs to the 82C55A family of programmable peripheral interfaces manufactured using advanced CMOS processes. It serves as a high-performance, low-power alternative to older NMOS versions while retaining functional equivalence. The series is widely used in embedded applications requiring reliable parallel I/O expansion for various microprocessor architectures.

Replacement Considerations

The IS82C55A-5 is functionally equivalent to the Intersil 8406602QA and standard 82C55A variants. Verify pin compatibility with existing NMOS 8255A designs before substitution. Ensure voltage levels and timing parameters align with the host microprocessor's specifications.