QS74FCT543TS0

Buffers, Drivers, Receivers, Transceivers Overview

The QS74FCT543TS0 is an octal registered bus transceiver manufactured by Quality Semiconductor. It operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. The device features three-state outputs with a low-level output current of 64 mA and a high-level output current of -32 mA. Propagation delay is typically 8.5 ns. It functions as a bidirectional data transfer element with independent control for latch and output enables in each direction, housed in a 24-pin SOIC package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal registered bus transceiver architecture providing eight-bit data storage and transfer capabilities
• Bidirectional data flow with independent master control for latches and output enables per direction
• Three-state outputs designed for direct connection to system buses without additional drivers
• CMOS construction ensuring compatibility with standard logic families while maintaining low power consumption

Buffers, Drivers, Receivers, Transceivers Applications

• High-performance memory mapping systems requiring registered data buffering
• Clocked bus architectures utilizing registered transceivers for signal integrity
• Bidirectional data gate applications in industrial control environments
• System interconnects requiring isolated data storage between processing units

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer designation as Quality Semiconductor or its successor entities during sourcing. Confirm the specific suffix indicates the SOIC-24 package variant. Ensure compliance with RoHS directives if required by the target application environment. Cross-reference datasheet revisions to confirm pinout consistency with existing designs.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal registered transceiver with independent directional control is required. The FCT series offers faster switching speeds compared to standard 74LS equivalents. Consider the 24-pin SOIC footprint for surface mount assembly constraints. Evaluate the 64 mA drive capability against bus loading requirements for reliable signal transmission.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the FCT (Fast CMOS) logic family, which bridges the performance gap between LS and AC logic families. The 543 designation specifically identifies an octal bus transceiver with registration. Quality Semiconductor was a primary producer of this line before industry consolidations. The TS0 suffix denotes the plastic small outline integrated circuit package configuration.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The CY74FCT543T from Texas Instruments serves as a functional equivalent within the same logic family. Both devices share identical electrical characteristics and pinouts. Verify that the replacement source confirms the registered bus transceiver functionality rather than a non-registered variant.