MC74VHC1GT126DFT2G

Overview

The MC74VHC1GT126DFT2G is a single-gate noninverting 3-state buffer from the 74VHC series, manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 5.5 V and features TTL-level input thresholds. The device provides high noise immunity through a buffered three-stage internal circuit. It supports partial power-down protection via IOFF and includes over-voltage tolerant inputs and outputs up to 5.5 V, enabling safe interfacing between 5 V and 3 V circuits. The component is housed in an SC-88A package with a DF suffix.

Feature Summary

• Features TTL-level input thresholds for direct compatibility with TTL logic systems.
• Provides partial power-down protection capability through dedicated IOFF support.
• Includes over-voltage tolerant input and output structures up to 5.5 V regardless of supply voltage.
• Delivers high noise immunity and stable output signals using a buffered three-stage design.

Applications

• Interfacing 5 V digital circuits with 3 V logic domains
• Partial power-down protection in battery-powered systems
• Signal buffering and line driving in portable electronics

Procurement Notes

Verify that the specific ordering suffix matches the required package type and shipping quantity. Confirm the presence of the -Q suffix if automotive qualification or unique site control changes are mandated by the application requirements. Ensure compliance with RoHS standards and check for any recent product change notices regarding manufacturing sites or material declarations before finalizing procurement orders.

Selection Notes

Select this component when TTL-compatible input thresholds are required rather than CMOS levels. Choose the MC74VHC1GT126 variant specifically for applications needing over-voltage tolerance at 5.5 V while operating at lower supply voltages. Consider the SC-88A package for compact surface-mount designs requiring minimal footprint area compared to larger packages.

Part Context

This part belongs to the MC74VHC1G126 family of single noninverting buffers. The 'T' designation indicates TTL input thresholds, distinguishing it from the standard CMOS threshold version. It is part of onsemi's 74VHC series, designed for low-power high-speed CMOS operations in small form-factor packages suitable for modern mobile and handheld devices.

Replacement Considerations

MC74VHC1G126DFT2G serves as the CMOS threshold equivalent within the same package and electrical specifications.