Nexperia USA Inc. 74LVC3G34DP,125

Overview

74LVC3G34DP,125 from Nexperia is a triple non-inverting buffer IC with Schmitt-trigger inputs, designed for level translation between 3.3 V and 5 V logic domains in mixed-voltage systems. It features IOFF partial power-down protection, ±24 mA output drive at 3.0 V, and operates across -40 °C to +125 °C. Used in industrial control I/O expansion and FPGA/CPLD interface conditioning.

For engineers reviewing the 74LVC3G34DP,125 datasheet, 74LVC3G34DP,125 pinout, 74LVC3G34DP,125 application, or 74LVC3G34DP,125 equivalent, key selection criteria include its overvoltage-tolerant 5.5 V inputs, guaranteed 1.65 V–5.5 V supply range, IOFF-enabled hot-swap capability, and TSSOP8 package compatibility with high-density PCB layouts.

Technical Context

This device implements three independent CMOS buffer gates, each with Schmitt-trigger input thresholds enabling robust operation with slow-rising or noisy signals. The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current during partial power-down sequences.

All inputs tolerate up to 5.5 V regardless of VCC (1.65 V–5.5 V), allowing direct interfacing with 5 V TTL outputs while powered from 1.8 V or 3.3 V rails. Propagation delay ranges from 0.5 ns (at 5 V) to 10.8 ns (at 1.65 V), with guaranteed timing across full temperature range.

Key Specifications

Pinout & Package

TSSOP8 package (SOT505-2): plastic thin shrink small outline, 8 leads, 3 mm body width, 0.5 mm lead length, pin 1 indicator at lower-left corner below marking "V34".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple buffer applications.

Compared with SN74LVC3G34DCUR and 74LVC3G34GN,132, the 74LVC3G34DP,125 offers the largest thermal pad area and highest Ptot derating margin (4.6 mW/K above 96 °C), making it preferred for thermally demanding industrial applications where long-term reliability outweighs minimal size savings.

Availability

74LVC3G34DP,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, FPGA configuration interfaces, and USB hub power management requiring stable component supply across extended temperature ranges.

Supply support for 74LVC3G34DP,125 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, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer electronics.

The 74LVC3G34 belongs to Nexperia's LVC logic family, engineered for low-voltage mixed-signal interfacing with emphasis on voltage translation, power sequencing safety, and robust operation in electrically noisy environments.

FAQ

Can 74LVC3G34DP,125 operate with VCC = 1.8 V while accepting 5 V inputs?

Yes. Its inputs are overvoltage tolerant up to 5.5 V independent of VCC, so it safely accepts 5 V signals when powered from 1.8 V. This enables direct interfacing between legacy 5 V peripherals and modern low-voltage microcontrollers without external level-shifting components.

What is the purpose of the IOFF feature and how does it behave during power-down?

The IOFF circuit disables all three outputs when VCC drops to 0 V, limiting output leakage to ±2 μA maximum. This prevents damaging backflow current from live I/O lines into the unpowered IC, supporting safe hot-swap and partial power-down sequences in modular systems.

Does the Schmitt-trigger input affect propagation delay specifications?

No. Propagation delay values (e.g., 0.5–4.0 ns at 5 V) are measured using standard input transition rates (≤2.5 ns) and include the full internal gate delay. The Schmitt-trigger hysteresis adds no measurable delay penalty but significantly improves noise rejection on slow or noisy edges.

Is 74LVC3G34DP,125 qualified for automotive applications?

No. While rated for -40 °C to +125 °C, this part is not AEC-Q100 qualified and lacks automotive-specific testing (e.g., HTOL, ESD stress beyond HBM 2 kV). It may be used in non-safety-critical automotive subsystems only after customer validation per ISO 16750 and internal reliability screening.