74HC240D

Overview

The 74HC240D is a CMOS octal buffer and line driver manufactured by Toshiba Semiconductor and Storage. It features two independent buffers, each with three-state outputs, housed in a 20-pin SOIC package. The device operates within a supply voltage range of 2V to 6V and supports a working temperature range from -40°C to 85°C. It provides an output current capability of 7.8mA for both high and low states, ensuring robust signal driving performance in digital logic applications.

Feature Summary

• Octal configuration with dual independent buffers
• Three-state output control for bus-oriented systems
• CMOS technology for low power consumption

Applications

• Bus-oriented architectures
• Clock drivers
• Memory address decoding

Procurement Notes

Verify the manufacturer designation as Toshiba Semiconductor and Storage on the component marking. Confirm the package type is 20-SOIC and the suffix 'D' corresponds to the tape and reel or tube packaging variant specified in the official datasheet. Ensure the operating temperature grade matches the -40°C to 85°C requirement for your specific application environment.

Selection Notes

Select this component when an octal buffer with three-state capability is required for bus systems. It is suitable for applications needing moderate drive strength (7.8mA) and operation across a wide voltage range (2V-6V). Consider the 20-SOIC package constraints for PCB layout and thermal management during the design phase.

Part Context

This part belongs to the standard 74HC series of high-speed CMOS logic devices. It serves as a fundamental building block for digital signal routing and isolation. The device is designed to interface between different logic families or levels, providing buffering and direction control in complex digital circuits.

Replacement Considerations

Cross-reference with other manufacturers' 74HC240 equivalents such as those from ON Semiconductor or Texas Instruments. Verify pin compatibility and electrical specifications before substitution.