74ACTQ543SPC

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ACTQ543SPC is an octal bus transceiver featuring registered outputs and three-state logic. It operates within a supply voltage range of 4.5V to 5.5V. The device provides robust output drive capability with ±24mA sourcing and sinking current, supporting moderate capacitive loading. It is housed in a 24-pin PDIP package and belongs to the 74ACTQ series.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver with registered outputs
• Three-state logic for efficient bus management
• Non-inverting signal transmission
• Robust output drive capability

Buffers, Drivers, Receivers, Transceivers Applications

• High-performance register transfer systems
• Bus-oriented memory architectures
• Clock driver circuits
• Buffer and line driver applications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor was acquired by ON Semiconductor. Confirm that the part number corresponds to the original Fairchild production run if legacy compatibility is required. Ensure the 24-PDIP package matches your board design constraints. Check for RoHS compliance status relative to the manufacturing date.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with data storage (register) functionality is needed. The ACTQ series offers faster switching speeds compared to standard AC series devices. Ensure the system operates strictly within the 4.5V to 5.5V supply range to maintain timing specifications and output drive integrity.

Buffers, Drivers, Receivers, Transceivers Part Context

This component is part of the 74ACTQ family, which combines the speed of AC logic with the noise immunity of ACT logic. The 'Q' suffix typically denotes qualified or specific packaging variants within the broader 74ACT543 architecture. It serves as a bridge between microprocessors and peripheral devices requiring latched data paths.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Equivalent parts include the 74ACQ543SC from Texas Instruments or ON Semiconductor. Verify pinout compatibility and electrical characteristics such as propagation delay and output current before substitution.