74ACQ544SC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ACQ544SC is an octal registered transceiver utilizing FACT Quiet Series technology. It features two sets of D-type registers for temporary data storage in either direction, with separate Latch Enable and Output Enable inputs for independent control. The device provides 3-STATE outputs capable of sourcing or sinking 24 mA. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -40°C to +85°C. Propagation delays are guaranteed at 12.0 ns maximum at 3.3 V and 8.0 ns maximum at 5.0 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Inverting octal transceiver with back-to-back D-type registers for bidirectional data flow
• FACT Quiet Series technology ensuring quiet output switching and improved dynamic threshold performance
• Separate controls for data flow enable, latch enable, and output enable in each direction

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional bus-oriented memory and I/O mapping
• Clock drivers requiring controlled skew and simultaneous switching noise reduction
• Bus-oriented registers for temporary data storage

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering code suffix to confirm package type, as the SC designation indicates a 24-Lead Small Outline Integrated Circuit (SOIC). Confirm that the required logic family matches the AC specifications rather than ACT, as electrical characteristics differ significantly between the two series. Ensure the design accounts for the active LOW polarity of all control inputs.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer with latching capability is required alongside low noise performance. The ACQ variant offers a wider supply voltage range compared to the ACTQ version. Consider the SOIC package dimensions if surface mount assembly is necessary. Verify that the system's clock edge rates meet the minimum input edge rate requirements specified in the datasheet.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACQ/ACTQ Quiet Series family of octal registered transceivers. It shares functional similarities with other devices in the 74ACQ54x series but is distinguished by its specific pinout and control logic configuration. The device utilizes Fairchild Semiconductor's proprietary FACT technology to enhance signal integrity in high-speed digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The 74ACTQ544SC serves as a compatible alternative within the same family, offering similar functionality but with different voltage and timing specifications. Cross-compatibility requires verification of supply voltage ranges and propagation delay constraints against the original design requirements.