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74LS240 Octal Buffers Line Drivers IC (74240) DIP-20 Package

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Description

The 74LS240 is an octal buffer/line driver IC with three-state (tri-state) outputs, designed for driving data buses and buffering signals in digital circuits. It consists of eight independent buffers arranged in two groups of four buffers with separate direction and enable controls, making it ideal for bidirectional data flow. The IC is commonly used to drive high-capacitance loads and to isolate bus lines to reduce signal interference.

Specifications

  • Logic Family: 74LS (Low Power Schottky)
  • Package Type: DIP-20 (Dual In-Line Package with 20 pins)
  • Supply Voltage (Vcc): 4.75V to 5.25V
  • Output Type: Tri-state (three-state) TTL
  • Input Levels:
    • Low: Max 0.8V
    • High: Min 2.0V
  • Output Levels:
    • Low: Max 0.4V
    • High: Min 2.7V
  • High-Level Output Current (I_OH): -15 mA
  • Low-Level Output Current (I_OL): 24 mA
  • Propagation Delay: Typically 9 ns to 15 ns
  • Power Dissipation: Typically 24 mW per gate
  • Operating Temperature: 0°C to 70°C

Features

  • Octal Bus Driver: Features 8 independent inverting buffers/drivers arranged in two groups with separate enables.
  • 3-State Outputs: Outputs can be placed in high impedance mode to prevent bus contention.
  • High Drive Capability: Can sink or source current up to 24 mA, allowing it to drive large loads or multiple TTL inputs.
  • TTL-Compatible: Inputs and outputs are TTL compatible, ensuring easy integration with other TTL logic ICs.
  • Active-Low Enable Inputs: Both groups of 4 buffers can be individually enabled or disabled via active-low inputs.
  • Low Power Consumption: Built using low power Schottky technology, offering lower power consumption compared to standard TTL devices.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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