74ACT240SJ

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ACT240SJ is an octal buffer and line driver featuring inverting 3-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V, with a maximum static current of 4 µA. The device provides symmetrical output impedance, sourcing and sinking a minimum of 24 mA. Propagation delay is specified at 8.5 ns at 5 V. Inputs are TTL-compatible, and the component supports 50 Ω transmission line driving capability.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Inverting 3-state outputs drive bus lines or buffer memory address registers
• Outputs source and sink 24 mA for high noise immunity
• TTL-compatible inputs ensure compatibility with standard logic families

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters or receivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the exact suffix against official datasheets, as package variations exist. Confirm RoHS compliance status for specific manufacturing lots. Check for obsolescence notices from onsemi, which acquired Fairchild's logic business. Ensure pinout compatibility with existing PCB footprints before integration.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring octal buffering with high drive strength. The ACT series offers improved speed over LS variants while maintaining CMOS low power dissipation. Verify that the 5V operating voltage aligns with system requirements. Consider the SOP-20 package constraints for board space limitations.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACT logic family, designed for high-speed digital applications. It serves as an octal buffer/line driver, often used in parallel data buses. The device improves PC board density by replacing multiple discrete drivers. It is functionally compatible with the 74LS240 but with faster switching speeds.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ACT240DW (Texas Instruments) and MC74ACT240DWCR2 (NXP/Motorola) are documented equivalents.