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P8255A-5

Manufacturer: AMD, INT, INTERSIL, INTEL

PROGRAMMABLE PERIPHEAL INTERFACE
Partnumber Manufacturer Quantity Availability
P8255A-5,P8255A5 AMD, INT, INTERSIL, INTEL 8603 In Stock

Description and Introduction

PROGRAMMABLE PERIPHEAL INTERFACE The **P8255A-5** from **Intersil** is a versatile **Programmable Peripheral Interface (PPI)** chip designed to facilitate efficient data transfer between microprocessors and peripheral devices. As part of the **8255 family**, this CMOS-based component is widely used in embedded systems, industrial control applications, and general-purpose interfacing solutions.  

Featuring **three 8-bit I/O ports (Port A, Port B, and Port C)**, the P8255A-5 supports multiple operational modes, including **Basic Input/Output (Mode 0), Strobed Input/Output (Mode 1), and Bidirectional Bus (Mode 2)**. Its programmable nature allows for flexible configuration, enabling seamless integration with various microprocessor architectures.  

The **-5 suffix** indicates a **5 MHz operating frequency**, ensuring reliable performance in moderate-speed applications. With **low power consumption** and **CMOS-level compatibility**, the P8255A-5 is suitable for power-sensitive designs while maintaining robust signal integrity.  

Key applications include **keyboard interfacing, sensor data acquisition, and parallel communication systems**. Its **40-pin DIP package** ensures straightforward PCB integration, making it a practical choice for both prototyping and production environments.  

Engineers favor the P8255A-5 for its **simplicity, reliability, and adaptability**, making it a longstanding solution in digital interfacing scenarios. Its legacy continues in modern designs where backward compatibility and ease of use remain priorities.

Application Scenarios & Design Considerations

PROGRAMMABLE PERIPHEAL INTERFACE

Alternative Part Number

  • 82C55A --: CMOS version of the 8255A programmable peripheral interface, functionally compatible and lower power, widely available as a drop-in replacement in most designs.
  • W8255A --: Direct second-source clone of the 8255A PPI with the same pinout and register set, commonly used as an alternative to Intel/NEC parts.
  • HD68B55 --: Hitachi's 8255-compatible programmable peripheral interface with equivalent functionality and pinout, suitable for legacy 8255A-5 sockets.
  • CP82C55A-5 --: CMOS programmable peripheral interface functionally compatible with the 8255A, lower power, and available in 5 MHz speed grade.
  • UPD71055C --: Direct CMOS replacement for the 8255A PPI with similar pinout and timing, widely used as a second-source equivalent.
  • 82C55A-5 --: CMOS 8255A-compatible peripheral interface rated at 5 MHz, suitable drop-in substitute for the AMD part.
  • 82C55A-5 --: CMOS version of the 8255 PPI, functionally equivalent with lower power consumption and 5 MHz speed grade matching the original.
  • 8255A-5 --: Standard Intel 8255A programmable peripheral interface in the 5 MHz grade, direct functional replacement for the P8255A-5.
  • W8255A-5 --: Second-source 8255A PPI from NEC with the same pinout and 5 MHz rating, widely used as a drop-in substitute.
  • CP82C55A-5 --: CMOS version of the 8255 PPI with the same 40-pin DIP pinout and 5 MHz timing, offering lower power consumption and direct drop-in compatibility.
  • i8255A-5 --: Original Intel 8255A programmable peripheral interface rated at 5 MHz, the de facto reference device that the P8255A-5 is functionally equivalent to.
  • W8255A-5 --: Second-source 8255A PPI from NEC with identical pinout and 5 MHz speed grade, widely used as a direct replacement in legacy designs.
  • 82C55A --: CMOS programmable peripheral interface that is functionally equivalent to the 8255A, with lower power consumption and direct pin compatibility.
  • W82C55A --: Pin-compatible CMOS 8255A replacement offering the same three 8-bit I/O ports and operating modes.
  • OKI M82C55A --: Second-source CMOS PPI device that is functionally and pin compatible with the Intel 8255A-5.

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