MC74VHC1GT125MU2TCG

Overview

The MC74VHC1GT125MU2TCG is a single non-inverting 3-state buffer from onsemi, housed in a UDFN6 package with dimensions of 1.2 x 1.0 mm and a 0.4 mm pitch. It features TTL-level input thresholds, distinguishing it from the CMOS-level MC74VHC1G125 variant. The device operates within a supply voltage range of 2.0 V to 5.5 V and supports inputs/outputs over-voltage tolerant up to 5.5 V regardless of the supply voltage. It includes IOFF for partial power down protection and provides high noise immunity through its buffered 3-state output structure.

Feature Summary

• TTL-level input thresholds enable direct interfacing with 5 V circuits while operating at lower supply voltages.
• IOFF feature supports partial power down protection to prevent excessive current draw when VCC is zero.
• Input and output structures provide protection against supply voltage mismatches, battery backup scenarios, and hot insertion events.

Applications

• Interfacing 5 V logic circuits to 3 V logic circuits
• Memory address/data bus driving applications requiring 3-state control
• Clock distribution buffers in portable or battery-powered devices

Procurement Notes

Verify the specific ordering suffix MU2TCG corresponds to the UDFN6 1.2 x 1.0 mm package with 0.4 mm pitch as documented in the official onsemi datasheet. Confirm that the TTL-level input threshold variant (GT) matches the system interface requirements rather than the CMOS-level (G) variant. Ensure compliance with RoHS and Pb-free specifications if required by the manufacturing process.

Selection Notes

Select this component when TTL-compatible input thresholds are necessary for interfacing with legacy 5 V logic sources. The UDFN6 1.2 x 1.0 mm package offers a compact footprint suitable for space-constrained designs. Consider the -Q suffix if automotive qualification and PPAP capability are required, as the standard version does not explicitly state AEC-Q100 qualification without the suffix.

Part Context

This part belongs to the MC74VHC1G series of single-gate logic devices designed for low-voltage CMOS applications. The GT variant specifically denotes TTL-level input thresholds, whereas the G variant uses CMOS thresholds. The series is characterized by high speed, low power consumption, and robust input/output protection structures suitable for various digital logic applications.

Replacement Considerations

MC74VHC1GT125DFT1G (SC-88A package)

FAQ

What is the difference between MC74VHC1G125 and MC74VHC1GT125?

The MC74VHC1G125 has CMOS-level input thresholds, while the MC74VHC1GT125 has TTL-level input thresholds. This allows the GT variant to interface directly with 5 V logic circuits more effectively.

Does the MC74VHC1GT125 support partial power down?

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