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The TC74VHC244FT(EL) is a high-speed CMOS octal bus buffer manufactured by Toshiba. Below are its key specifications, descriptions, and features:

Specifications:

• Logic Type: Octal Bus Buffer/Line Driver
• Technology: CMOS (VHC - Very High-Speed CMOS)
• Supply Voltage Range: 2.0V to 5.5V
• High-Speed Operation:
• Propagation Delay (tpd): 3.8 ns (max) at 5V
• Output Current: ±8 mA (at 5V)
• Input Voltage Levels:
• High-Level Input Voltage (VIH): 2.0V (min) at VCC = 5V
• Low-Level Input Voltage (VIL): 0.8V (max) at VCC = 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: TSSOP-20 (EL package)

Descriptions:

• Function: Non-inverting 3-state buffer with two enable controls (1G and 2G).
• Pin Configuration:
• 1G, 2G: Active-low output enable pins (each controls 4 buffers).
• A1-A4, A5-A8: Input pins.
• Y1-Y4, Y5-Y8: Output pins.
• 3-State Outputs: Allows outputs to be in high-impedance state when disabled.

Features:

• Low Power Consumption: ICC = 4 μA (max) at Ta = 25°C
• Balanced Propagation Delays: Ensures stable signal transmission.
• Wide Operating Voltage: Supports 2V to 5.5V, making it compatible with TTL levels.
• High Noise Immunity: CMOS technology provides robust noise resistance.
• Pb-Free & RoHS Compliant: Environmentally friendly.

This part is commonly used in digital systems for signal buffering, bus driving, and interfacing between different voltage levels.

For detailed electrical characteristics and timing diagrams, refer to Toshiba’s official datasheet.