NXP Semiconductors 74LVTH125D,112

Overview

74LVTH125D,112 from Nexperia is a 3.3 V quad non-inverting 3-state buffer with bus-hold inputs and IOFF partial power-down protection, operating from 2.7 V to 3.6 V supply, delivering ±32 mA/±64 mA output drive, and specified for -40 °C to +85 °C industrial temperature range. It serves as a level-translating bus interface in backplane or motherboard data routing applications.

For engineers reviewing the 74LVTH125D,112 datasheet, 74LVTH125D,112 pinout, 74LVTH125D,112 application, or 74LVTH125D,112 equivalent, key selection criteria include 5.5 V-tolerant inputs, sub-4 ns propagation delay at 3.3 V, bus-hold functionality eliminating external pull-ups, IOFF leakage < ±100 μA during power-down, and SO14 (SOT108-1) package compatibility with legacy 14-pin PCB footprints.

Technical Context

This device implements four independent non-inverting buffers, each controlled by an active-low 3-state enable input (nOE). Each buffer features BiCMOS output stages enabling high-speed switching (tPLH/tPHL ≤ 4.0 ns at VCC = 3.3 V) and robust drive capability (IOH = –32 mA, IOL = 64 mA).

Bus-hold circuitry maintains valid logic states on unused inputs without external resistors (IBHL = 75–150 μA LOW, IBHH = –150 to –75 μA HIGH), while the IOFF circuit disables outputs and limits backflow current (< ±100 μA) when VCC = 0 V - critical for hot-swap and partial-power-down systems.

Key Specifications

Pinout & Package

74LVTH125D,112 is supplied in a plastic small outline package (SO14), SOT108-1, with 14 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a bevelled corner or index notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVTH125D,112, both alternatives omit bus-hold and IOFF - increasing BOM cost and design complexity for industrial hot-swap or mixed-voltage use cases where those features directly reduce component count and improve system robustness.

Availability

74LVTH125D,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded control bus isolation, telecom line card signal conditioning, and test equipment digital I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVTH125D,112 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74LVTH series delivers high-speed, 3.3 V-compatible TTL-level interface ICs optimized for industrial backplanes, modular systems, and mixed-voltage signal routing where bus-hold and IOFF are critical for system-level robustness.

FAQ

What is the maximum input voltage the 74LVTH125D,112 can tolerate?

The 74LVTH125D,112 accepts input voltages up to +7.0 V absolute maximum, but its recommended overvoltage tolerance is +5.5 V under normal operation - enabling safe interfacing with 5 V TTL logic while powered from a 3.3 V supply without external clamping or level translation.

Does the 74LVTH125D,112 require external pull-up resistors on unused inputs?

No. The device integrates bus-hold circuitry on all data inputs (1A–4A), providing ±75–150 μA holding current to maintain the last valid logic state - eliminating the need for external pull-up or pull-down resistors and reducing bill-of-materials count and PCB area.

Can the 74LVTH125D,112 be used in hot-swap applications?

Yes. Its IOFF circuitry actively disables outputs and limits power-off leakage to ±100 μA when VCC = 0 V, preventing damaging back-current flow during live insertion or extraction - making it suitable for modular backplanes and carrier-board architectures requiring hot-swap capability.

What is the typical propagation delay at 3.3 V supply?

At VCC = 3.3 V and Tamb = 25 °C, the typical propagation delay is 2.7 ns (LOW-to-HIGH) and 2.9 ns (HIGH-to-LOW); the maximum guaranteed delay across –40 °C to +85 °C is 4.0 ns - supporting reliable operation in high-speed parallel bus timing budgets.