74FCT544ASPC

Buffers, Drivers, Receivers, Transceivers Overview

The National Semiconductor 74FCT544ASPC is an octal registered bus transceiver belonging to the FCT series. It features eight bits of data transfer with inverted outputs and three-state control. The device operates on a single 5 V supply and utilizes CMOS technology for low power consumption. It is housed in a 24-pin PDIP package designed for through-hole mounting. The component supports bidirectional data flow controlled by independent direction and output enable signals, ensuring reliable data latching and transmission in digital systems.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides registered storage for eight-bit data words with inverted logic levels
• Supports bidirectional data transfer between two ports under independent control
• Features three-state outputs for effective bus line management and isolation

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data bus buffering in computer architectures
• Memory interface circuits requiring registered data paths
• I/O expansion modules for microprocessor systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer origin as National Semiconductor or its successor entities like Texas Instruments due to corporate acquisitions. Confirm the specific suffix ASPC corresponds to the PDIP-24 package variant. Check RoHS compliance status as historical records indicate non-compliance for this specific part number. Ensure the component meets the required operating temperature range of 0°C to 70°C for your application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal registered transceiver with inverted outputs is required for bidirectional data handling. It is suitable for applications needing data latching capabilities alongside bus driving functions. Consider the PDIP-24 package constraints for PCB layout and thermal management. Compare against non-registered alternatives if data storage within the transceiver stage is not necessary for the system design.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Fast CMOS (FCT) logic family, which offers high-speed performance comparable to LS TTL but with lower power consumption. The 74FCT544 variant specifically provides registered functionality, distinguishing it from the unregistered 74FCT541. It serves as a critical interface component in legacy and industrial digital systems requiring robust data retention during bus transitions.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The 74FCT544ASPC is listed as obsolete. Potential substitutes include the IDT QS74FCT544CTP or generic 74FCT544 equivalents. Verify pin compatibility and electrical specifications before substitution. Note that newer revisions may have updated packaging or compliance certifications.