74ACQ244SCX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ACQ244SCX is an octal buffer and line driver utilizing Fairchild Quiet Series technology. It features 3-STATE outputs, operates within a 2.0V to 6.0V supply range, and supports propagation delays of 5.0 ns typical at 5.0V with 50 pF load. The device provides 24 mA output drive capability, low quiescent current (4.0 µA typ), and guaranteed pin-to-pin skew performance.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Utilizes Quiet Series technology for improved dynamic threshold performance and reduced simultaneous switching noise.
• Features GTO output control and undershoot correction for superior signal integrity.
• Provides split ground bus architecture to enhance overall circuit performance.
• Offers 3-STATE outputs suitable for driving bus lines or buffering memory address registers.

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'SCX' corresponds to the 20-Lead Small Outline Integrated Circuit (SOIC) package as defined in the datasheet. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards. Ensure the design accounts for the recommended operating conditions regarding supply voltage and temperature ranges.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-density PCB layouts require improved noise immunity and faster propagation delays compared to standard AC/ACT logic families. The 3-STATE functionality allows for efficient bus sharing. Consider the SOIC package dimensions for surface mount assembly constraints and verify thermal management needs based on the specified junction temperature limits.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACQ/74ACTQ Quiet Series family of octal buffers. It is designed to replace standard 74AC244 devices where lower noise and better dynamic performance are critical. The series integrates specific noise reduction features not found in conventional CMOS logic, making it suitable for high-speed digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible replacements include the 74ACQ244SC without the reel suffix or other variants in the 74ACQ244 family such as the PDIP version. Verify that any substitute maintains the same Quiet Series specifications and package outline M20B.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the maximum output drive current for the 74ACQ244SCX?

The outputs can source and sink up to 24 mA.

How does the Quiet Series technology benefit this device?

It guarantees quiet output switching, reduces ICC and IOZ by 50%, and improves dynamic threshold performance through GTO output control and undershoot correction.

What is the typical propagation delay at 5.0V?

The typical propagation delay (tPHL/tPLH) is 5.0 ns with a 50 pF load at 5.0V.