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D8255A\B Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
D8255A\BNEC200Yes

D8255A/B** is a **Programmable Peripheral Interface (PPI)** chip manufactured by **NEC (Nippon Electric Company)**.

The D8255A/B is a Programmable Peripheral Interface (PPI) chip manufactured by NEC (Nippon Electric Company).

Key Specifications:

  • Manufacturer: NEC (Nippon Electric Company)
  • Type: Programmable Peripheral Interface (PPI)
  • Compatibility: Similar to Intel’s 8255A PPI
  • Operating Voltage: Typically 5V
  • Package: 40-pin DIP (Dual In-line Package)
  • Operating Temperature Range: Commercial/Industrial grade (specifics depend on variant)

Features:

  • Three 8-bit I/O Ports (Port A, Port B, Port C)
  • Bit-addressable I/O modes
  • Supports three main operating modes:
  • Mode 0: Basic Input/Output
  • Mode 1: Strobed Input/Output
  • Mode 2: Bidirectional Bus
  • Programmable control logic
  • TTL-compatible inputs/outputs
  • Low-power CMOS variants available in some models

Applications:

  • Used in microprocessor-based systems for interfacing with peripherals such as keyboards, displays, and sensors.
  • Commonly found in industrial control systems, embedded systems, and early computing devices.

This chip is functionally equivalent to the Intel 8255A, ensuring compatibility in many legacy systems.

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