MC74HC240AFELG

Overview

The MC74HC240AFELG is an octal 3-state inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55°C to +125°C. The device features two active-low output enables and provides high noise immunity with low input current. Propagation delays vary from 80 ns at 2.0 V to 14 ns at 6.0 V, while maximum quiescent supply current reaches 160 µA at 125°C.

Feature Summary

• Octal 3-state inverting buffer design with dual active-low output enables
• High noise immunity characteristic of CMOS devices
• Outputs directly interface to CMOS, NMOS, and TTL loads

Applications

• Memory address drivers
• Clock drivers
• Sub-oriented systems

Procurement Notes

Verify the specific suffix 'FELG' against official ordering lists, as standard datasheets list DWG and DTG variants. Confirm RoHS compliance status and package dimensions for the exact part number before procurement. Ensure environmental specifications match application requirements.

Selection Notes

Select this component for applications requiring octal bus buffering with inverting logic. Consider the wide operating voltage range and industrial temperature limits. Verify pinout compatibility with existing designs referencing LS240 standards.

Part Context

This device belongs to the HC240A series of high-performance silicon-gate CMOS buffers. It shares functional similarities with the HC244A but differs in signal polarity. The product line includes automotive qualified variants with the '-Q' suffix for specialized site control requirements.

Replacement Considerations

Direct substitutes include MC74HC240ADWG and MC74HC240ADTG. Non-inverting equivalents like MC74HC244A require logic inversion adjustments.