IMS82C55AZ

Overview

The IMS82C55AZ is a CMOS Programmable Peripheral Interface manufactured by Renesas Electronics Corporation. It provides 24 programmable I/O pins organized into three 8-bit ports (A, B, and C). The device operates on a single 5V supply with a voltage range of 4.5V to 5.5V. It supports parallel interface communication with a maximum clock frequency of 8MHz. The component is housed in a 44-PLCC package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Offers 24 individually programmable I/O pins configurable in two groups of 12 for flexible system integration.
• Features fully static CMOS design ensuring low standby power consumption and TTL compatibility without external pull-up resistors.
• Supports direct bit set/reset capability and enhanced control word read functionality for precise peripheral management.

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 ordering suffix to confirm package type and temperature grade, as variations exist within the 82C55A family. Confirm RoHS compliance status and moisture sensitivity level requirements against project specifications. Check current availability as this component may be subject to end-of-life notices or limited stock conditions from the manufacturer.

Selection Notes

Select the IMS82C55AZ when a 44-pin PLCC surface-mount package is required for industrial temperature ranges. Ensure the design utilizes a 5V logic standard compatible with TTL inputs. Verify that the 8MHz maximum clock speed meets the system timing requirements. Consider alternative packages like DIP if through-hole mounting is necessary.

Part Context

This component belongs to the 82C55A series of CMOS Programmable Peripheral Interfaces. It serves as a high-performance, low-power replacement for older NMOS versions, maintaining pin compatibility while offering improved electrical characteristics. The series is widely used in legacy and modern embedded systems for expanding I/O capabilities.

Replacement Considerations

The IP82C55AZ is a pin-compatible alternative available in a 40-PDIP package. Other variants in the 82C55A family may offer different temperature ranges or packaging options but require verification of electrical specifications before substitution.