The LD8255A is a programmable peripheral interface (PPI) device manufactured by Rochester Electronics. It is designed to provide a flexible and versatile means of interfacing microprocessors and microcontrollers with peripheral devices. The LD8255A offers three 8-bit parallel ports that can be individually configured for input or output, making it suitable for a wide range of applications.

Applications

• Microprocessor-based systems
• Peripheral device interfacing
• Industrial control systems
• Data acquisition systems
• Robotics
• Instrumentation

Features

• Three 8-bit parallel ports (Port A, Port B, Port C)
• Individually programmable ports for input or output
• Bit set/reset capability for Port C
• Operating Modes: Mode 0 (Basic Input/Output), Mode 1 (Strobed Input/Output), Mode 2 (Bidirectional Bus)
• TTL compatible inputs and outputs
• Single 5V power supply
• Package: DIP-40
• Operating Temperature: 0°C to +70°C

Benefits

• Flexible Interfacing: Programmable ports allow for easy adaptation to different peripheral devices.
• Simplified System Design: Reduces the need for complex interface circuitry.
• Versatile Functionality: Multiple operating modes provide flexibility in data transfer.
• Cost-Effective Solution: Provides a cost-effective means of interfacing with peripherals.
• Easy Integration: Compatible with a wide range of microprocessors and microcontrollers.

Additional Details

The LD8255A is typically packaged in a 40-pin DIP (Dual In-line Package), facilitating easy insertion and removal from circuit boards. The device requires a single 5V power supply for operation. It is designed to operate within a commercial temperature range (0°C to +70°C). The LD8255A is a versatile component commonly used in legacy systems and applications where a simple parallel interface is required. Rochester Electronics often provides continued availability of components that are no longer manufactured by the original manufacturer. Its three operating modes allow for a range of data transfer scenarios. The bit set/reset capability for Port C allows for individual control of specific bits within the port, making it useful for control applications.