SN74HCT646DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT646DWR is an octal bus transceiver and register featuring three-state outputs, manufactured by Texas Instruments. It belongs to the HCT logic series, ensuring compatibility with TTL input levels while operating on a CMOS platform. The device integrates D-type flip-flops for data storage and provides bidirectional data transfer capabilities controlled by direction signals. Packaged in a 24-pin SOIC (DW) format, it supports surface-mount assembly. Key electrical specifications include a propagation delay of 52 ns at 4.5 V and 47 ns at 5.5 V. It operates within a supply voltage range of 4.5 V to 5.5 V and functions reliably across an industrial temperature range from -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates octal bus transceiver functionality with D-type flip-flops for simultaneous data transfer and storage
• Provides three-state outputs to facilitate efficient bus-oriented memory and circuit designs
• Ensures system-wide compatibility through TTL-compatible input levels within the HCT logic family

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory systems requiring registered data latching
• Bidirectional data transfer between microprocessors and peripheral devices
• Industrial control systems operating within standard voltage and temperature ranges

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific revision code and package variant against the official Texas Instruments datasheet to ensure compatibility with design requirements. Confirm that the procurement source provides authentic components with traceable manufacturing origins. Check for any specific handling instructions related to electrostatic discharge during installation. Ensure the ordering suffix matches the desired reel or tape configuration if applicable to the production line.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require both bus driving and data registration in a single package. The HCT series selection is appropriate for applications needing direct interface with TTL logic without level shifting. Consider the 24-pin SOIC package for space-constrained printed circuit board layouts. Evaluate the propagation delay characteristics against the system clock speed to ensure timing margins are met under worst-case voltage and temperature conditions.

Buffers, Drivers, Receivers, Transceivers Part Context

This part is part of the SN74HCT646 family of octal bus transceivers and registers. It shares functional similarities with other HCT series devices but is distinct due to its integrated flip-flop capability. The 'DWR' suffix indicates the specific SOIC-24 package and reel packaging. It serves as a critical interface component in digital logic circuits where data integrity and bidirectional communication are required.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74HCT646DR is a compatible alternative offering identical electrical performance in the same SOIC-24 package. Verify pinout compatibility and logical function equivalence before substitution. Ensure that any replacement maintains the same HCT logic family characteristics for seamless integration.