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74F381N Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
74F381NS125Yes

74F381N** is a 4-bit arithmetic logic unit (ALU) manufactured by **Fairchild Semiconductor** (now part of ON Semiconductor).

The 74F381N is a 4-bit arithmetic logic unit (ALU) manufactured by Fairchild Semiconductor (now part of ON Semiconductor). Below are its key specifications, descriptions, and features:

Specifications:

  • Logic Family: 74F (Fast TTL)
  • Function: 4-bit Arithmetic Logic Unit (ALU)
  • Operating Voltage: 5V ±5%
  • Operating Temperature Range: 0°C to +70°C (Commercial)
  • Package: 20-pin DIP (Dual In-line Package)
  • Propagation Delay: Typically 6.5ns (varies based on conditions)
  • Power Dissipation: ~500mW (max)
  • Input/Output Compatibility: TTL levels

Descriptions:

  • Performs 8 arithmetic and logic operations on two 4-bit inputs.
  • Includes carry-in (Cn) and carry-out (Cn+4) for cascading multiple ALUs.
  • Outputs function results (F0-F3) and status flags (P, G, Cn+4) for carry lookahead.
  • Mode select (S0, S1, S2) determines the operation (e.g., addition, subtraction, AND, OR).

Features:

  • High-speed operation (Fast TTL technology).
  • Parallel carry lookahead for faster arithmetic operations.
  • Wide range of functions (addition, subtraction, AND, OR, XOR, etc.).
  • Directly cascadable for wider word lengths.
  • TTL-compatible inputs and outputs.

For detailed timing diagrams and truth tables, refer to the official 74F381 datasheet from ON Semiconductor.

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