The CD82C55A-5 is a programmable peripheral interface device manufactured by Intersil Corporation. It's designed to interface microprocessors to external parallel I/O devices or peripherals. Being an enhanced version of the Intel 8255A, it offers improved performance and lower power consumption. This CMOS device provides a flexible means of interfacing with a wide range of peripheral devices through programmable input/output ports.

Applications

• Microprocessor-based systems requiring parallel I/O.
• Data acquisition systems.
• Industrial control equipment.
• Robotics.
• Instrumentation.

Features

• Fully programmable I/O ports.
• CMOS technology for low power consumption.
• Three 8-bit I/O ports (Port A, Port B, and Port C).
• Multiple operating modes (Mode 0, Mode 1, Mode 2).
• Buffered outputs for high drive capability.
• TTL compatible inputs and outputs.

Benefits

• Flexible interface for a variety of peripheral devices.
• Reduced power consumption compared to NMOS devices.
• Simplified system design due to programmable I/O functionality.
• Enhanced system reliability due to robust design.
• Cost-effective solution for parallel I/O requirements.

Technical Specifications

The CD82C55A-5 operates on a single +5V power supply and typically interfaces directly with the microprocessor's data, address, and control buses. Each of the three I/O ports can be individually configured for input or output operation. Mode 0 provides simple I/O operation, Mode 1 supports strobed I/O, and Mode 2 provides bidirectional bus operation for Port A. The device is housed in a DIP package. Further detailed specifications are available in the Intersil datasheet.