MC74VHC1G126DFT2G-Q

Overview

The MC74VHC1G126DFT2G-Q is a single-channel non-inverting 3-state buffer from the 74VHC logic family, manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 5.5 V and features CMOS-level input thresholds. The device provides high noise immunity through buffered output structures and includes protection against over-voltage up to 5.5 V on inputs and outputs, regardless of the supply voltage state. It supports partial power-down protection via IOFF functionality and delivers source/sink currents of 8 mA at 3.0 V. The component is AEC-Q100 qualified and PPAP capable, designed for automotive applications requiring unique site and control change requirements.

Feature Summary

• Single-channel non-inverting 3-state buffer with CMOS-level input thresholds
• Over-voltage tolerant inputs and outputs up to 5.5 V for safe interfacing between 5 V and 3 V circuits
• IOFF feature enables partial power-down protection to prevent excessive current draw during power-off states
• AEC-Q100 qualified and PPAP capable for automotive and high-reliability applications

Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Interfacing 5 V logic circuits with 3 V logic circuits
• Battery backup systems where hot insertion protection is required
• General purpose buffering in portable and battery-powered devices

Procurement Notes

Verify that the ordering suffix matches the specific package type and pin orientation required for your design, as the -Q suffix indicates automotive qualification with unique site and control change requirements. Confirm RoHS compliance and Pb-free status directly from the manufacturer's documentation before procurement. Ensure the selected package variant aligns with your PCB footprint constraints and thermal management needs.

Selection Notes

Select this component when a single-channel non-inverting buffer with 3-state output control is needed in a compact footprint. The CMOS input thresholds make it suitable for low-voltage digital interfaces. Consider the -Q suffix if the application demands automotive-grade reliability and PPAP capability. Evaluate the available package options such as SC-88A or UDFN6 based on space limitations and mounting preferences.

Part Context

This part belongs to the MC74VHC1G126 series of single-gate non-inverting 3-state buffers. It shares functional similarities with the MC74VHC1GT126, which features TTL-level input thresholds instead of CMOS-level. Both variants are available in multiple tiny footprint packages including SC-88A, SC-74A, SOT-953, and UDFN6. The -Q suffix denotes automotive qualification with specific manufacturing controls.

Replacement Considerations

MC74VHC1G126DFT2G (non-automotive version)

FAQ

What is the difference between MC74VHC1G126 and MC74VHC1GT126?

The MC74VHC1G126 has CMOS-level input thresholds, while the MC74VHC1GT126 has TTL-level input thresholds. Both are single-gate non-inverting 3-state buffers.

Does the -Q suffix change the electrical function of the device?

No, the -Q suffix does not change the electrical function. It indicates that the device is AEC-Q100 qualified and PPAP capable, intended for automotive and other applications requiring unique site and control change requirements.