74ACTQ373QSCX

Latches Overview

The onsemi 74ACTQ373QSCX is an octal transparent latch with 3-STATE outputs, part of the Quiet Series utilizing FACT technology. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from -40°C to +85°C. The device features eight D-type latches in a single package, providing simultaneous switching noise reduction and improved dynamic threshold performance. Key electrical characteristics include propagation delays of up to 9.0 ns at 5.0V with 50 pF load, output drive capabilities of ±24 mA, and maximum quiescent supply current of 40 µA.

Latches Feature Summary

• Utilizes Fairchild Quiet Series technology for guaranteed quiet output switching and superior dynamic threshold performance.
• Features GTO output control and undershoot corrector alongside a split ground bus for enhanced signal integrity.
• Provides 3-STATE outputs suitable for driving bus lines or buffering memory address registers.
• Offers improved latch-up immunity and reduced simultaneous switching noise levels compared to standard AC/ACT devices.

Latches Applications

• Bus organized system applications requiring data storage and transfer.
• Buffering memory address registers in digital systems.
• Driving bus lines where high impedance states are required for multiple device sharing.

Latches Procurement Notes

Verify that the ordering code includes the 'X' suffix to confirm the component is supplied in Tape and Reel packaging. Ensure the specific variant matches the required package type, as the base model is available in SOIC, SOP, PDIP, and QSOP configurations. Confirm compliance with RoHS directives and check for any specific environmental classifications such as MSL ratings before finalizing procurement orders.

Latches Selection Notes

Select this component when designing systems that require low noise performance and high-speed data latching within a 5V logic environment. The ACTQ series is appropriate for applications needing faster propagation delays than standard AC/ACT counterparts while maintaining compatibility with existing 3-STATE bus architectures. Consider the 20-pin QSOP package for space-constrained surface mount designs.

Latches Part Context

This component belongs to the 74ACQ373 and 74ACTQ373 family of octal transparent latches manufactured under Fairchild Semiconductor's Quiet Series. The 'Q' designation indicates the Quarter Size Outline Package (QSOP), specifically the MQA20 package number. The 'ACT' prefix specifies the 5V operation range, distinguishing it from the broader voltage range ACQ variants.

Latches Replacement Considerations

The datasheet lists the 74ACQ373SC, 74ACQ373SJ, 74ACQ373PC, 74ACTQ373SC, 74ACTQ373SJ, and 74ACTQ373PC as related ordering codes within the same functional family but in different packages. No direct cross-manufacturer substitutes are explicitly confirmed in the provided text.

Latches FAQ

How does the Quiet Series technology benefit the 74ACTQ373?

It guarantees quiet output switching, reduces ICC and IOZ by 50%, and improves dynamic threshold performance through GTO output control and a split ground bus.

What is the function of the Output Enable (OE) input?

When OE is LOW, the outputs are in the 2-state mode. When OE is HIGH, the outputs enter a high impedance state, isolating them from the bus without affecting the internal latch data.