MC74HCT240ADW

Overview

The MC74HCT240ADW is an octal bus buffer and line driver manufactured by onsemi. It belongs to the HCT logic series, utilizing CMOS technology for low power dissipation while maintaining compatibility with TTL inputs. The device features eight inverting outputs with three-state capability, controlled by two active-low output enable inputs. It operates within a supply voltage range of 4.5 V to 5.5 V. The component is housed in a 20-pin SOIC package, suitable for surface mount applications.

Feature Summary

• Octal configuration providing eight independent inverting buffers
• Three-state outputs allowing connection to shared data buses
• Dual active-low output enables for precise control
• CMOS construction ensuring low static power consumption

Applications

• Memory address register buffering
• Clock drivers
• Bus-oriented architectures

Procurement Notes

Verify the specific suffix 'ADW' against the manufacturer's current ordering guide to confirm package dimensions and tape/reel specifications. Ensure the procurement channel provides RoHS compliance documentation consistent with the datasheet requirements. Cross-reference the date code to verify manufacturing recency if long-term availability is critical for the design lifecycle.

Selection Notes

Select this component when interfacing between 5V CMOS systems and TTL-compatible logic due to its HCT input characteristics. It is appropriate for designs requiring high noise immunity and balanced propagation delays. Consider the SOIC-20 package constraints regarding thermal dissipation and board space compared to alternative packages like TSSOP or SOIC-W.

Part Context

This part is part of the MC74HC240A family, which includes variants with different suffixes indicating package types or environmental compliance. The HCT series specifically targets applications requiring direct interface with Transistor-Transistor Logic (TTL) circuits while offering the benefits of Complementary Metal-Oxide-Semiconductor (CMOS) technology.

Replacement Considerations

Check for MC74HCT240DTR2G or MC74HCT240MTCX as potential pin-compatible alternatives from onsemi with different packaging options.