IS82C55A-5Z96

Overview

The IS82C55A-5Z96 is a CMOS Programmable Peripheral Interface (PPI) manufactured by Renesas Electronics Corporation. It provides 24 programmable I/O pins organized into three 8-bit ports, compatible with the industry-standard NMOS 8255A. The device supports parallel interface communication and operates within a supply voltage range of 4.5V to 5.5V. It features open-drain outputs capable of sourcing or sinking 2.5mA per pin. The component is housed in a 44-pin PLCC package and is designed for surface-mount installation. It supports clock frequencies up to 5MHz and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Offers 24 individually programmable I/O pins divided into two groups of 12.
• Supports multiple modes of operation including direct bit set/reset capabilities.
• Ensures low standby power consumption with static CMOS circuit design.
• Maintains TTL compatibility without requiring external pull-up resistors.

Applications

• General-purpose programmable I/O expansion for microprocessor systems
• Interface solutions for 80C86 and 80C88 microprocessors
• Industrial control applications requiring robust I/O handling

Procurement Notes

Verify the specific suffix 'Z96' against official Renesas documentation to confirm exact manufacturing lot details and RoHS compliance status. Ensure the selected variant matches the required 5MHz speed grade and PLCC-44 package dimensions for your PCB layout. Confirm availability through authorized distributors as this component may have limited stock due to its age.

Selection Notes

Select this component when a drop-in replacement for the legacy 8255A is required in a CMOS process. Ensure the design accommodates the 44-pin PLCC footprint and allows for sufficient clearance around the J-leads. Verify that the system bus timing aligns with the 5MHz maximum clock frequency specification to prevent data integrity issues during high-speed transfers.

Part Context

This part belongs to the 82C55A family of high-performance CMOS PPI devices. It serves as a bridge between microprocessors and peripheral devices, offering flexibility in configuring input and output lines. The series is known for its compatibility with standard microprocessor architectures and its ability to operate with low power dissipation compared to older NMOS equivalents.

Replacement Considerations

The IMS82C55AZ is a functionally equivalent alternative within the same product family. Both parts share identical pinouts and electrical characteristics, allowing for potential interchangeability in designs where the specific manufacturer branding does not impact qualification requirements.