CD74HCT640EE4

Overview

The CD74HCT640EE4 is an octal buffer and line driver manufactured by Texas Instruments. It features high-speed CMOS technology compatible with standard TTL logic levels. The device provides eight independent buffers, each capable of driving high capacitive loads. It operates within a supply voltage range of 4.5 V to 5.5 V. The component utilizes a 20-pin plastic small outline package (SOIC) for surface mount applications.

Feature Summary

• Provides eight independent buffer channels for signal conditioning
• Ensures compatibility with standard TTL logic input levels
• Supports high-speed operation suitable for digital systems

Applications

• Digital signal buffering in computer systems
• Line driving for memory interfaces
• General purpose logic level translation

Procurement Notes

Verify the specific suffix EE4 confirms the RoHS-compliant lead-free status and the SOIC-20 package type. Confirm the manufacturer designation matches Texas Instruments directly. Check for any additional environmental certifications required by your supply chain standards before finalizing procurement orders.

Selection Notes

Select this component when eight buffered outputs are required for high-speed digital applications. Ensure the system voltage aligns with the specified HCT logic family requirements. Consider the physical footprint constraints of the SOIC-20 package during PCB layout design to ensure proper thermal and electrical performance.

Part Context

This part belongs to the CD74HCT series of high-speed CMOS logic devices. It serves as a buffer variant within the broader family of Texas Instruments logic components. The HCT designation indicates compatibility with HC logic families while maintaining TTL input thresholds for robust interfacing.

Replacement Considerations

Direct substitutes include the CD74HCT640E. Verify pinout compatibility and electrical specifications match exactly. Alternative packages may require adapter solutions or redesign.