74LVC125AD/AUJ

Overview

The 74LVC125AD/AUJ is a quad buffer and line driver manufactured by Nexperia, operating within a supply voltage range of 1.2 V to 3.6 V. It features four non-inverting buffers with three-state outputs controlled by active-low enable inputs (nOE). The device supports overvoltage tolerant inputs up to 5.5 V, allowing direct interfacing with 5 V logic in mixed-voltage environments. It includes IOFF circuitry for partial power-down mode operation to prevent backflow current. The component utilizes Schmitt-trigger action at all inputs to tolerate slow rise and fall times.

Feature Summary

• Provides four independent non-inverting buffers with three-state outputs controlled by dedicated enable pins.
• Features overvoltage tolerant inputs capable of handling signals up to 5.5 V while operating on lower supply voltages.
• Includes integrated IOFF circuitry to disable outputs during partial power-down, preventing potentially damaging backflow currents.
• Incorporates Schmitt-trigger action at all input pins to ensure signal integrity with slower input transition rates.

Applications

• Signal translation between mixed 3.3 V and 5 V logic environments
• Partial power-down applications requiring isolation of powered-down sections
• Bus-oriented driving and line drivers for high-capacitance loads

Procurement Notes

Verify the specific package variant against the ordering information table, as the AUJ suffix typically denotes the SO14 (SOT108-1) plastic small outline package. Confirm that the required temperature range matches the -40 °C to +125 °C specification listed for this part number. Ensure design compliance with the absolute maximum ratings regarding supply voltage and output current limits to avoid permanent damage.

Selection Notes

Select this component when designing systems requiring interface between different voltage domains, specifically where 5 V tolerant inputs are necessary alongside low-voltage CMOS operation. The inclusion of IOFF functionality makes it suitable for battery-powered or partially powered bus architectures. Verify that the required propagation delay and drive current capabilities align with the dynamic characteristics specified for the target supply voltage.

Part Context

This device belongs to the 74LVC125A family of quad buffers with 3-state outputs. It is part of the broader LVC series designed for low-voltage CMOS applications. The product data sheet indicates multiple package options including TSSOP14 and DHVQFN14, with the AD variant specifically corresponding to the SO14 package type.

Replacement Considerations

Direct substitutes include other 74LVC125 variants from compatible manufacturers such as MC74LCX125DR2G, provided pin compatibility and electrical specifications match the application requirements.