MC74VHC1G125DFT1G

Overview

The MC74VHC1G125DFT1G is a single non-inverting 3-state buffer from the onsemi 74VHC series, housed in an SC-88A (SOT-353) package. 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 with buffered outputs capable of sourcing and sinking 8 mA at 3.0 V. It includes over-voltage tolerant inputs and outputs up to 5.5 V, supporting partial power-down protection via IOFF.

Feature Summary

• Single-channel non-inverting buffer with 3-state output capability for bus holding or signal isolation
• CMOS-level input thresholds ensure compatibility with standard logic families across the operating voltage range
• Over-voltage tolerant I/O structures protect against mismatched supply voltages during hot insertion or battery backup scenarios

Applications

• Interface circuits connecting 5 V logic domains to 3 V systems
• Partial power-down mode applications requiring IOFF support
• Bus-oriented communications where tri-state control is necessary

Procurement Notes

Verify the specific suffix 'DF' corresponds to the SC-88A package and 'T1G' indicates tape and reel shipping configuration. Confirm RoHS compliance status as required by project specifications. Ensure the ordering code matches the exact device variant needed for the design.

Selection Notes

Select this component when a compact single-buffer solution with 3-state functionality is required. The CMOS threshold version is appropriate for standard CMOS logic interfaces. Consider the SC-88A package dimensions for PCB layout constraints and verify thermal dissipation requirements for the specific application environment.

Part Context

This part belongs to the MC74VHC1G125/MC74VHC1GT125 family of tiny footprint buffers. The 'G' suffix denotes CMOS input thresholds, distinguishing it from the 'GT' variant which uses TTL thresholds. The 'DF' suffix specifies the SC-88A package type, while 'T1G' refers to the specific reel orientation and packaging format.

Replacement Considerations

MC74VHC1G125DFT2G: Same device in SC-88A package with different tape and reel orientation.

FAQ

What is the difference between MC74VHC1G125 and MC74VHC1GT125?

The MC74VHC1G125 has CMOS-level input thresholds, whereas the MC74VHC1GT125 has TTL-level input thresholds. Both share identical electrical characteristics otherwise.

Does the MC74VHC1G125 support partial power-down?

Yes, the device supports partial power-down protection through its IOFF feature, which prevents excessive current flow when VCC is zero but inputs are active.