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The MSM82C55A-2VJS is a CMOS programmable peripheral interface (PPI) IC manufactured by OKI. Below are its key specifications, descriptions, and features:

Manufacturer: OKI

Part Number: MSM82C55A-2VJS

Specifications:

• Technology: CMOS
• Operating Voltage: 5V ±10%
• Operating Temperature Range: -40°C to +85°C
• Speed Grade: 2 (indicating a specific performance level)
• Package Type: PLCC (Plastic Leaded Chip Carrier)
• Pin Count: 44 pins

Descriptions:

• The MSM82C55A-2VJS is a programmable I/O interface chip designed for microprocessor-based systems.
• It provides three 8-bit ports (Port A, Port B, Port C) that can be configured for input or output operations.
• Supports multiple operating modes, including Mode 0 (Basic I/O), Mode 1 (Strobed I/O), and Mode 2 (Bidirectional Bus).
• Compatible with various microprocessors, including Intel 8085/8086/8088 and other industry-standard CPUs.

Features:

• Low Power Consumption: CMOS technology ensures efficient power usage.
• Programmable I/O Ports: Flexible configuration for different data transfer needs.
• Bit Set/Reset Capability: Allows individual control of Port C bits.
• TTL-Compatible Inputs/Outputs: Ensures compatibility with standard logic levels.
• High Noise Immunity: Robust design for reliable operation in industrial environments.

This IC is commonly used in embedded systems, industrial control, and microprocessor-based applications requiring flexible I/O interfacing.