74LVC125APW/AUJ

Overview

The 74LVC125A is a quad buffer and line driver featuring 3-state outputs controlled by active-low output enable inputs (nOE). It operates within a supply voltage range of 1.2 V to 3.6 V and supports overvoltage tolerant inputs up to 5.5 V, enabling direct interfacing with 3.3 V or 5 V devices in mixed-voltage environments. The device incorporates Schmitt-trigger action for noise immunity and IOFF circuitry to prevent backflow current during partial power-down conditions.

Feature Summary

• Provides four non-inverting buffers with 3-state outputs controlled by dedicated nOE pins
• Features Schmitt-trigger inputs to ensure tolerance for slow rise and fall times
• Includes IOFF circuitry to disable outputs and prevent damaging backflow currents when powered down
• Supports direct interface with TTL levels and mixed 3.3 V/5 V logic environments

Applications

• Translating signals between mixed 3.3 V and 5 V logic systems
• Driving high-capacitance or transmission-line loads as a line driver
• Managing bus lines requiring controlled high-impedance states

Procurement Notes

Verify the specific package suffix against the ordering information table to confirm lead frame material and body width dimensions. Confirm that the required temperature range matches the -40 °C to +125 °C specification listed for the TSSOP14 variant. Ensure design compliance with the absolute maximum ratings regarding supply voltage and input clamping currents.

Selection Notes

Select this component when a quad buffer with independent 3-state control is required for low-voltage CMOS applications. The wide supply range from 1.2 V to 3.6 V allows flexibility in system power design. The 5 V tolerant inputs simplify integration with legacy 5 V peripherals without additional level shifting components.

Part Context

This part belongs to the Nexperia 74LVC family of low-voltage CMOS logic devices. The 74LVC125A specifically provides quad buffering functionality. It is manufactured by Nexperia B.V., which acquired the standard logic business from NXP Semiconductors. The datasheet revision history indicates ongoing updates to ESD specifications and package outlines.

Replacement Considerations

The 74LVC125AD serves as an alternative in the SO14 package. The 74LVC125ABQ is available in the DHVQFN14 package. The 74LVC125ABZ is offered in the DHXQFN14 package. Verify pinout compatibility and thermal dissipation requirements when substituting between these package types.