CD74HCT126E

Overview

The CD74HCT126E is a high-speed CMOS logic quad buffer with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. The device utilizes a 14-pin Small Outline Integrated Circuit (SOIC) package, specifically the N variant, with a width of 0.295 inches (7.50 mm). It features true output polarity and independent output enable controls for each channel.

Feature Summary

• Quad configuration providing four independent buffered channels
• Three-state output capability allowing bus line sharing
• High-speed CMOS technology ensuring low power consumption
• Wide operating voltage range compatible with standard logic levels

Applications

• Bus-oriented communications systems
• Clock distribution networks
• Memory address decoding circuits
• Signal buffering between different logic families

Procurement Notes

Verify the specific suffix 'E' corresponds to the 14-SOIC package when sourcing. Confirm the manufacturer origin, as this part number may be produced by Texas Instruments or authorized licensees such as Harris or Intersil. Ensure the component meets the specified industrial temperature grade if deployed in harsh environments. Cross-reference datasheet revisions to confirm pinout consistency across different production eras.

Selection Notes

Select this component when a quad buffer with tri-state control is required for HCT logic compatibility. It serves as a direct functional replacement for older 74HCT126 equivalents. Consider the SOIC package constraints regarding board space and thermal dissipation. Verify that the input voltage levels match the driving source specifications to ensure reliable switching performance.

Part Context

This device belongs to the Texas Instruments CD74HCT series of high-speed CMOS logic components. It is functionally equivalent to the industry-standard 74HCT126. The series is designed for applications requiring fast propagation delays and low static power consumption while maintaining compatibility with TTL logic levels.

Replacement Considerations

Direct substitutes include CD74HC126E and SN74HCT126N. Verify package type compatibility before substitution. Check manufacturer-specific electrical characteristics for minor variations in propagation delay or drive strength.