Nexperia USA Inc. 74LVT125DB,118

Overview

74LVT125DB,118 from Nexperia is a 3.3 V quad non-inverting buffer with 3-state outputs, designed for bus interface applications in mixed-voltage systems. It features active-low output enable (nOE) control per channel, bus hold inputs eliminating external pull-ups, IOFF partial power-down protection, and ±64 mA/–32 mA drive capability. Used in industrial control backplanes and FPGA I/O expansion where level translation and bus contention avoidance are required.

For engineers reviewing the 74LVT125DB,118 datasheet, 74LVT125DB,118 pinout, 74LVT125DB,118 application, or 74LVT125DB,118 equivalent, key selection criteria include 3.3 V operation with 5.5 V-tolerant inputs, sub-4 ns propagation delay at 3.3 V, IOFF-enabled hot-swap support, and SO14 package compatibility with legacy 74-series footprints.

Technical Context

This BiCMOS device implements four independent non-inverting buffers, each with dedicated active-low 3-state enable (nOE). Its IOFF circuit disables outputs during power-down to prevent backflow current, enabling safe live insertion in powered systems.

Bus hold circuitry maintains valid logic states on unused inputs without external resistors, while overvoltage-tolerant inputs accept up to 5.5 V-allowing direct interfacing with 5 V TTL buses without level shifters. Propagation delays are specified down to 2.7 V supply, supporting wide-input-voltage-range operation.

Key Specifications

Pinout & Package

74LVT125DB,118 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVT125DB,118, the PW variant offers identical functionality in a smaller TSSOP package but demands tighter assembly tolerances, while the SN74LVC125APWR sacrifices critical industrial features-IOFF and bus hold-for lower cost and wider supply range, limiting use in hot-plug or floating-input designs.

Availability

74LVT125DB,118 is available at Aetrix Electronics and suitable for industrial backplane interface, FPGA I/O expansion, and memory subsystem buffering requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74LVT125DB,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 delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and consumer applications.

The 74LVT series targets high-speed, 3.3 V bus interface applications demanding robustness, low power, and mixed-voltage interoperability-designed specifically for backplane, FPGA, and memory subsystem use cases.

FAQ

Does 74LVT125DB,118 support hot-plug insertion into a live 5 V bus?

Yes. Its IOFF circuitry disables outputs and limits leakage to ±100 μA when VCC = 0 V, preventing damaging backflow current. Combined with 5.5 V-tolerant inputs, it safely interfaces with powered 5 V buses during live insertion-verified per JESD78 Class II latch-up testing (>500 mA).

Can unused inputs be left floating?

Yes. Integrated bus hold circuitry actively maintains the last-valid logic state on unconnected inputs using ±75 μA to ±150 μA internal current-eliminating need for external pull-up or pull-down resistors and preventing noise-induced switching.

What is the maximum capacitive load this device can drive reliably?

It reliably drives up to 60 pF loads while maintaining sub-4 ns propagation delay and output voltage specifications (VOH ≥ 2.0 V, VOL ≤ 0.55 V at 64 mA). Performance is validated per JEDEC test conditions with 50 pF load and 500 Ω termination in the datasheet's dynamic characteristics table.

Is 74LVT125DB,118 pin-compatible with standard 74LS125?

No. While functionally similar as a quad 3-state buffer, 74LVT125DB,118 uses SO14 pinout matching industry-standard 74-series layouts (e.g., 74HC125), but differs electrically: it operates at 3.3 V (not 5 V), has 5.5 V-tolerant inputs, and includes IOFF and bus hold-features absent in 74LS125.