CD74HCT126M

Overview

The CD74HCT126M is a high-speed CMOS logic quad buffer featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended industrial temperature range from -55°C to +125°C. The device utilizes a 14-pin Small Outline Integrated Circuit (SOIC) package with a width of 0.295 inches (7.50 mm). As part of the HCT series, it provides compatibility with standard TTL inputs while maintaining low power consumption characteristics inherent to CMOS technology.

Feature Summary

• Quad buffer configuration with independent control for each channel
• Three-state output capability allowing bus line sharing
• High-speed CMOS construction for efficient power usage
• Extended temperature rating suitable for harsh environments

Applications

• Bus-oriented memory and signal switching applications
• Clock drivers and buffering circuits
• Data acquisition systems requiring signal isolation
• Industrial control interfaces operating at extreme temperatures

Procurement Notes

Verify the specific manufacturer source, as this component is produced by multiple entities including Texas Instruments, Renesas, and Harris. Confirm that the datasheet matches the intended electrical specifications and pinout. Ensure the package dimensions align with your PCB footprint requirements. Check for any specific ordering suffixes that may indicate packaging variations or environmental compliance status.

Selection Notes

Select this component when a quad buffer with tri-state functionality is required for bus architectures. The HCT logic family ensures compatibility with TTL-driven systems. Consider the wide operating temperature range if the application involves industrial or automotive environments. Verify that the SOIC package size fits the available board space and manufacturing capabilities.

Part Context

This device belongs to the CD74HCT series of high-speed CMOS logic devices. It serves as a non-inverting buffer, distinct from inverters or transceivers. The 'M' suffix typically denotes the SOIC package variant. Similar components in the family include the CD74HC126, which offers HC logic speed but may differ in input threshold characteristics compared to the HCT series.

Replacement Considerations

Compatible substitutes include SN74HCT126 and CD74HCT126 variants from other manufacturers such as Renesas or Intersil. Ensure functional equivalence regarding voltage levels and output drive strength. Verify package compatibility before substitution.