The CDP1856CD3 is a CMOS programmable peripheral interface circuit manufactured by Intersil Corporation. It is designed to interface microprocessors, specifically the RCA COSMAC microprocessors, with external peripherals. This component acts as a versatile I/O expander, enabling the microprocessor to control and monitor a wide array of devices.

Applications

• Industrial Control Systems: Used in systems requiring digital I/O for monitoring and control.
• Data Acquisition Systems: Employed to interface with sensors and data converters.
• Embedded Systems: Integrated into embedded systems for general-purpose I/O expansion.
• Robotics: Applied in robotic control systems for interfacing with actuators and sensors.
• Instrumentation: Used in test and measurement equipment for digital control and data acquisition.

Features

• Programmable I/O: Each I/O port can be independently programmed as input or output.
• CMOS Technology: Low power consumption suitable for battery-powered applications.
• Multiple I/O Ports: Provides several programmable I/O ports for flexible interfacing.
• Direct Interface with COSMAC Microprocessors: Designed for seamless integration with RCA COSMAC CPUs.
• TTL Compatibility: Compatible with TTL logic levels for easy integration with other digital components.

Benefits

• Enhanced System Flexibility: Allows for adaptable I/O configurations to meet varying application needs.
• Reduced Power Consumption: CMOS technology minimizes power requirements, extending battery life in portable devices.
• Simplified System Design: Eases the design process by providing a pre-configured I/O interface.
• Cost-Effective I/O Expansion: Offers a cost-efficient solution for expanding the I/O capabilities of microprocessor systems.
• Improved System Reliability: Provides a robust and reliable interface between the microprocessor and peripheral devices.

Additional Details

The CDP1856CD3 typically operates from a single 5V power supply. It communicates with the microprocessor via an 8-bit bidirectional data bus and control signals. The device is packaged in a standard DIP (Dual In-line Package), facilitating easy integration into circuit boards. It is crucial to consult the Intersil datasheet for specific timing requirements and electrical characteristics to ensure proper operation within the intended application.