74ACT646SPC

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ACT646SPC is an octal bus transceiver and register featuring non-inverting, three-state outputs. It operates within a supply voltage range of 2V to 6V and utilizes a 24-pin plastic dual in-line package (PDIP). The device integrates D-type flip-flops for data storage, allowing multiplexed transmission of data directly from the input bus or from internal registers. Inputs are TTL-compatible, and outputs provide source/sink currents of 24mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal registered bus transceiver with independent A and B bus registers
• Multiplexed real-time and stored data transfer capabilities
• TTL-compatible inputs with three-state outputs

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and I/O systems
• Clocking data buffers
• Bidirectional bus drivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lead-free ordering suffixes as standard packaging may vary. Check current availability as legacy logic components may have limited stock or obsolescence risks.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring bidirectional data flow with optional latching functionality. Ensure system voltage aligns with the 2V to 6V operating range. Consider the PDIP package constraints for PCB layout and thermal management compared to surface-mount alternatives.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74AC/74ACT series of high-speed CMOS logic devices. It serves as a bridge between microprocessors and peripheral devices, offering both combinational and sequential logic functions in a single package. The ACT variant specifically ensures compatibility with TTL logic levels while maintaining CMOS power efficiency.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Equivalent parts include MC74ACT646 from ON Semiconductor and NXP 74HCT646 variants, though HCT versions differ in speed and voltage characteristics. Verify pinout compatibility and electrical specifications before substitution.