The TC74HC244AF is an integrated circuit (IC) manufactured by Toshiba. It is an octal non-inverting buffer with 3-state outputs. The key specifications of this IC are as follows:


  • Function: Buffer/Line Driver
  • Logic Type: CMOS
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Voltage - Supply: 2V to 6V
  • Operating Temperature: -40°C to 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (Small Outline Integrated Circuit)
  • DataSheet TC74HC244AF(EL,F) PDF

Key Features:

  • Octal Buffer: It has 8 channels for buffering signals.
  • Non-Inverting: The buffer doesn't invert the input signal.
  • 3-State Outputs: This allows the outputs to be disabled, effectively disconnecting them from the circuit, useful in bus-oriented systems to avoid bus contention.


The TC74HC244AF is primarily used for signal buffering in digital systems. Commonly, it is used for level shifting, signal isolation, and bus driving applications.


Typical applications include signal amplification and isolation in microcontroller-based systems, interfacing between components operating at different voltage levels, and driving signals along a bus where multiple devices may need to either drive or "tri-state" their outputs.

This specific IC is offered in a 20-SOIC package, which is well-suited for surface-mount applications, making it easier to integrate into compact electronic designs. Always refer to the datasheet and specifications for detailed information and proper usage of the IC for a specific application.

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