MC74AC240M

Overview

The MC74AC240M is an octal buffer and line driver manufactured by onsemi, belonging to the AC logic series. It features eight inputs and eight outputs with inverting polarity. The device utilizes a 20-pin SOIC package and supports surface mount installation. It operates within a supply voltage range of 2 V to 6 V. Key electrical characteristics include high-level and low-level output currents of 24 mA each, a maximum static current of 8 uA, and a typical propagation delay of 13 ns at 5 V. The component functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides octal buffering and line driving capabilities with three-state outputs for bus-oriented systems.
• Features inverting polarity to complement non-inverting logic designs.
• Supports wide supply voltage operation ranging from 2 V to 6 V for flexible system integration.

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• High noise immunity input devices

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status as indicated in the manufacturer's documentation. Check for any lifecycle notices regarding obsolescence or last-time buy dates before finalizing procurement plans.

Selection Notes

Select this component when an octal inverting buffer with three-state control is required. Ensure the design accommodates the 2 V to 6 V supply range and 24 mA drive capability. Verify that the SOIC-20 package dimensions fit the PCB layout constraints and thermal requirements.

Part Context

This part belongs to the 74AC family of CMOS logic devices, offering higher speed than standard 74LS counterparts while maintaining low power dissipation. It is functionally compatible with other 74AC series components, allowing for mixed logic family designs where speed and drive strength are prioritized over legacy compatibility.

Replacement Considerations

Direct substitutes include MC74AC240DWR2G and MM74AC240MTCX. Cross-manufacturer equivalents such as SN74AC240PW from Texas Instruments may be considered if pinout and electrical parameters match exactly.