Nexperia USA Inc. 74LVC125AD,118

Overview

74LVC125AD,118 from Nexperia is a quad 3-state buffer/line driver with 5 V tolerant inputs and outputs, operating from 1.2 V to 3.6 V supply, featuring Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and -40 °C to +125 °C temperature rating - used in mixed-voltage level translation between 3.3 V logic and legacy 5 V peripherals in industrial I/O modules.

For engineers reviewing the 74LVC125AD,118 datasheet, 74LVC125AD,118 pinout, 74LVC125AD,118 application, or 74LVC125AD,118 equivalent, key selection criteria include 5.5 V input overvoltage tolerance, 2.5 ns typical propagation delay at 3.3 V, IOFF-enabled bus isolation during power sequencing, and SO14 (SOT108-1) package compatibility with legacy PCB footprints.

Technical Context

This device implements four independent non-inverting buffers, each with active-low 3-state enable (nOE), enabling selective bus driving without contention. All inputs incorporate Schmitt-trigger action, supporting slow-rising signals up to 20 ns/V at 2.3–2.7 V VCC and 10 ns/V at 2.7–3.6 V.

The IOFF circuit ensures output disable and leakage current ≤ ±10 μA when VCC = 0 V and inputs/outputs driven to 5.5 V - critical for hot-swap and multi-rail power sequencing. Input voltage range spans -0.5 V to 5.5 V regardless of VCC, enabling robust interfacing across voltage domains.

Key Specifications

Pinout & Package

74LVC125AD,118 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, JEDEC MS-012 compliant, with gull-wing leads and pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Compared with SN74LVC125APWR and 74LVC125ABQ,115, the 74LVC125AD,118 offers drop-in replacement capability on legacy SO14 layouts, simplified assembly, and proven field reliability in vibration-prone industrial enclosures - making it optimal for cost-sensitive, volume-manufactured control hardware.

Availability

74LVC125AD,118 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, automated test equipment, and medical diagnostic interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC125AD,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions - delivering energy-efficient, robust components for automotive, industrial, and consumer markets.

The 74LVC125A series belongs to Nexperia's advanced LVC logic family, designed specifically for low-voltage mixed-signal interfacing with emphasis on voltage translation, bus isolation, and power-aware operation in resource-constrained embedded systems.

FAQ

Can 74LVC125AD,118 operate with VCC = 1.2 V while driving 5 V-tolerant loads?

Yes - the device is fully specified down to 1.2 V VCC and maintains 5.5 V input/output tolerance across its entire supply range. At 1.2 V, VOH is guaranteed ≥1.08 V and VOL ≤0.12 V, sufficient to drive CMOS inputs of higher-voltage devices via pull-up resistors or compatible receivers. Propagation delay increases to 12 ns, but functional interoperability remains intact.

Does the SO14 package (SOT108-1) support reflow soldering per IPC-J-STD-020?

Yes - the 74LVC125AD,118 in SO14 packaging is rated for standard lead-free reflow profiles (peak 260 °C, 20–40 sec above 217 °C). Its moisture sensitivity level (MSL) is 1, meaning unlimited floor life at ≤30 °C/60% RH. No pre-bake is required prior to assembly, simplifying manufacturing logistics.

How does IOFF behavior differ from standard high-impedance state?

IOFF actively disables output drivers and blocks current flow even when VCC = 0 V and inputs/outputs are biased to 5.5 V - preventing damaging backfeed through parasitic diodes. Standard 3-state only disables drivers while VCC is powered; IOFF adds fail-safe isolation during power sequencing, hot-swap events, or brown-out conditions.

Is Schmitt-trigger input hysteresis adjustable or fixed?

Hysteresis is fixed and process-defined: typically 0.3 V at VCC = 3.3 V, scaling proportionally with supply voltage. It is not user-adjustable but provides consistent noise margin across temperature (-40 °C to +125 °C) and voltage (1.2–3.6 V), eliminating need for external hysteresis components in sensor interface applications.