74AC646SCX

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74AC646SCX is an octal registered bus transceiver belonging to the AC series. It features eight D-type flip-flops with 3-state outputs, designed for high-speed, low-power CMOS applications. The device operates within a supply voltage range of 2.0V to 6.0V and supports data transfer in both directions controlled by a direction input. It utilizes a 24-pin Small Outline Integrated Circuit (SOIC) package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent data paths
• Registered architecture with separate clock inputs for each flip-flop
• Bidirectional data flow capability via dedicated direction control pin
• Three-state outputs enabling direct connection to system buses

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory systems requiring registered data storage
• High-speed isolated bidirectional data buffers
• Clock-delayed output drivers for synchronous logic circuits
• General-purpose 8-bit register modules in digital instrumentation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'SCX' against official Fairchild documentation to confirm lead-free status and tape-and-reel packaging specifications. Ensure compatibility with existing PCB footprints for the SOIC-24 package. Cross-reference RoHS compliance certificates with current manufacturer declarations prior to procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer with registered outputs is required. The AC series offers faster switching speeds compared to standard 74LS equivalents while maintaining lower power consumption than older bipolar technologies. Verify that the operating voltage range aligns with the target system's power supply rails.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74AC family of high-speed CMOS logic devices. It serves as a registered version of the non-latched 74AC645 bus transceiver. The registered nature allows for precise timing control in synchronous designs, distinguishing it from transparent latch variants like the 74AC574 or simple drivers without registration capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct functional substitutes include the 74AC645 for non-registered applications or other 74AC646 variants from different manufacturers such as Texas Instruments or NXP, provided pinouts and electrical characteristics match.