The UPD74HCT240GST2 is an octal buffer/line driver with 3-state outputs manufactured by NEC. This device is designed to improve the drive capability of digital signals. The HCT version is compatible with TTL voltage levels, making it suitable for interfacing TTL and CMOS logic.

Applications

• Bus Driving: Driving signals on a bus with improved current capability.
• Memory Interfacing: Buffering signals between memory devices and the CPU.
• Data Buffering: Temporarily storing data and providing isolation between different parts of a system.
• Line Driving: Driving signals over long cables with reduced signal degradation.
• TTL to CMOS Interfacing: Bridging the gap between TTL and CMOS logic levels.

Features

• Octal Buffer/Line Driver: Contains eight independent buffer/line driver circuits.
• 3-State Outputs: Allows the outputs to be disabled, providing high impedance for bus sharing.
• TTL Compatible Inputs: Accepts TTL voltage levels.
• High Output Drive Capability: Can drive relatively large loads.
• CMOS Technology: Provides low static power dissipation.
• Inverted Outputs: The outputs are inverted versions of the inputs.

Benefits

• Improved Signal Integrity: Provides better signal strength and reduces signal degradation.
• Enhanced System Performance: Improves the overall performance of digital systems.
• Simplified Interfacing: Simplifies the interfacing of TTL and CMOS logic.
• Bus Sharing Capability: The 3-state outputs allow the device to be used in bus-oriented applications.

Additional Details

The UPD74HCT240GST2 consists of eight inverting buffers with 3-state outputs. The outputs are enabled or disabled by the Output Enable (OE) input. When OE is low, the outputs are enabled; when OE is high, the outputs are in a high-impedance state. The outputs are inverted; a HIGH input results in a LOW output when enabled, and vice versa.

This device is commonly available in a SOIC (Small Outline Integrated Circuit) package.