MC74VHC240MEL

Overview

The MC74VHC240MEL is an octal inverting bus driver manufactured by Motorola, now under onsemi. It features two independent 4-bit buffers with three-state outputs in a 20-SOIC package. The device operates on a supply voltage range of 2V to 5.5V and supports surface mount installation. It provides high-speed performance with a typical propagation delay of 3.6ns at 5V and low power dissipation with a maximum static current of 4μA at 25°C.

Feature Summary

• Octal inverting bus driver architecture with two independent 4-bit sections
• Three-state output capability for effective bus line management
• High noise immunity characteristics suitable for demanding environments
• Low power consumption design with minimal static current draw

Applications

• High-speed data bus buffering applications
• Clock distribution circuits requiring inversion
• Memory interface drivers
• General-purpose digital signal routing

Procurement Notes

Verify component authenticity as the manufacturer has undergone corporate transitions. Confirm RoHS compliance status through official documentation, as legacy parts may vary. Ensure the specific suffix matches your board design requirements. Cross-reference datasheets for electrical tolerances before integration into final assemblies.

Selection Notes

Select this component when an octal inverting buffer with three-state control is required. The VHC series offers superior speed compared to standard HC logic while maintaining CMOS compatibility. Consider the 20-SOIC package dimensions for PCB layout constraints. Verify supply voltage ranges match the target system operating conditions.

Part Context

This part belongs to the 74VHC logic family, known for high-speed operation and wide voltage compatibility. Motorola's semiconductor division was acquired by onsemi, which continues production and support for these legacy industrial components. The device serves as a critical interface element in digital systems requiring signal inversion and bus isolation.

Replacement Considerations

Direct substitutes include MC74VHC240DTR2G from onsemi. Other compatible options involve checking equivalent octal inverters from Texas Instruments or NXP that maintain pin compatibility and electrical specifications.

FAQ

What is the typical propagation delay of the MC74VHC240MEL?

The typical propagation delay is 3.6ns when operating at a supply voltage of 5V.

Does the MC74VHC240MEL support three-state outputs?

Yes, the device features three-state outputs allowing for effective bus line management.