74FCT543ASC

Buffers, Drivers, Receivers, Transceivers Overview

The 74FCT543ASC is an octal registered transceiver manufactured by National Semiconductor, now part of Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features TTL-compatible input and output levels. The device provides non-inverting data transfer with three-state outputs and supports low-level output currents of 64 mA and high-level output currents of -32 mA. It is housed in a 24-CDIP package and functions as a single circuit with eight channels. The component is designed for surface mount or through-hole applications depending on the specific variant, though this model utilizes the CDIP format.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal registered transceiver architecture providing eight-bit data storage and transfer capabilities
• Three-state outputs allowing direct connection to system buses without additional drivers
• TTL-compatible logic levels ensuring interoperability with standard digital systems

Buffers, Drivers, Receivers, Transceivers Applications

• High-performance bus-oriented memory architectures
• Clocking circuits requiring registered data latching
• Bus driver applications in industrial control systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify current availability status as this component may be discontinued or subject to limited production runs. Confirm package integrity and moisture sensitivity level handling requirements prior to assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications and regulatory compliance standards such as RoHS where applicable.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring octal data registration with bus isolation capabilities. Ensure the 24-CDIP package fits the target PCB footprint and thermal constraints. Verify that the 5V operating voltage aligns with the system power rails and that the propagation delay characteristics meet the timing requirements of the specific application interface.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the 74FCT logic family, which offers faster switching speeds compared to standard 74LS series devices while maintaining compatible pinouts. The 74FCT543A variant serves as the base model for this registered transceiver configuration. National Semiconductor was acquired by Texas Instruments, which continues to support and manufacture these legacy logic components under the TI brand portfolio.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Equivalent parts include CY74FCT543TSOCT and CY74FCT543ATQCT from Texas Instruments. These alternatives offer similar functional specifications but utilize different packages such as SOIC-24 or QSOP-24 instead of the CDIP format. Verify pinout compatibility and electrical parameters before substituting.