MC74VHC1GT125DBVT1G-Q

Overview

The MC74VHC1GT125DBVT1G-Q is a single non-inverting 3-state buffer from the VHC logic family, 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 its buffered three-stage internal circuit and includes over-voltage tolerant inputs and outputs up to 5.5 V. It supports partial power down protection via IOFF and offers source/sink currents of 8 mA at 3.0 V. The component is housed in an SC-74A (SC-70-5) package with five pins.

Feature Summary

• TTL-level input thresholds for direct interfacing with 5 V circuits
• Over-voltage tolerant inputs and outputs up to 5.5 V regardless of supply voltage
• Partial power down protection capability via IOFF feature
• High noise immunity provided by buffered three-stage output structure

Applications

• Interfacing 5 V circuits to 3 V circuits
• Automotive applications requiring AEC-Q100 qualification
• Portable equipment utilizing low voltage operation
• Battery backup systems preventing destruction from voltage mismatch

Procurement Notes

Verify that the ordering suffix matches the specific package type and shipping configuration required for your assembly line. Confirm the presence of the -Q suffix indicates compliance with automotive site and control change requirements. Ensure the component meets RoHS, Halogen-free, and BFR-free standards as specified in the datasheet. Cross-reference the date code and marking diagram against your incoming inspection protocols to guarantee authenticity and traceability.

Selection Notes

Select this part when TTL-level input compatibility is necessary alongside CMOS performance characteristics. The SC-74A package is suitable for space-constrained designs requiring surface mount technology. Consider the -Q suffix if the application demands automotive-grade quality assurance and unique site control changes. Evaluate the 8 mA drive strength against load requirements to ensure signal integrity without exceeding maximum ratings.

Part Context

This component belongs to the MC74VHC1G series of single buffers. It shares functional similarities with the MC74VHC1G125 but differs in input threshold levels, offering TTL compatibility instead of CMOS levels. The -Q suffix distinguishes it as an automotive-qualified variant capable of PPAP submission. It is part of onsemi's portfolio of tiny footprint logic devices designed for portable and industrial applications.

Replacement Considerations

MC74VHC1GT125DFT1G

FAQ

What is the difference between MC74VHC1G125 and MC74VHC1GT125?

The MC74VHC1G125 has CMOS-level input thresholds, while the MC74VHC1GT125 has TTL-level input thresholds.

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

No, the -Q suffix indicates AEC-Q100 qualification and PPAP capability for automotive applications, but does not alter the logical function or electrical specifications.

How does the IOFF feature benefit the circuit?

IOFF supports partial power down protection, preventing excessive current flow when the device is powered down but still connected to active signal lines.