Nexperia USA Inc. 74LVC3G34GF,115

Overview

74LVC3G34GF,115 from Nexperia is a triple non-inverting buffer IC with Schmitt-trigger inputs, designed for level translation between 1.65 V–5.5 V logic domains. It provides ±24 mA output drive at 3.0 V, supports IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in mixed-voltage I/O interfacing on microcontroller peripheral buses and sensor signal conditioning paths.

For engineers reviewing the 74LVC3G34GF,115 datasheet, 74LVC3G34GF,115 pinout, 74LVC3G34GF,115 application, or 74LVC3G34GF,115 equivalent, key selection criteria include its overvoltage-tolerant 5.5 V inputs, guaranteed propagation delay ≤5.1 ns at 3.3 V, IOFF-enabled backflow prevention during power sequencing, and XSON8 (SOT1089) package compatibility with high-density PCB layouts.

Technical Context

This device implements three independent CMOS buffer stages with hysteresis-equipped Schmitt-trigger inputs, enabling robust operation with slow-rising or noisy signals. Each channel features rail-to-rail input tolerance up to 5.5 V regardless of VCC, allowing seamless interface between 3.3 V and 5 V systems without external resistors.

The IOFF circuit activates automatically when VCC = 0 V, disabling all outputs and limiting off-state leakage to ±2 μA - critical for hot-swap and multi-rail power management. Propagation delay is specified down to 0.5 ns (typical) at 5.5 V supply, with dynamic power dissipation governed by CPD = 14 pF.

Key Specifications

Pinout & Package

XSON8 package (SOT1089): plastic extremely thin small outline, no leads, 8-terminal surface-mount with 1.0 mm × 1.45 mm × 0.5 mm body height. Pin 1 index located at lower-left corner beneath marking code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G34DCUR and 74LVC3G34GT,115, the 74LVC3G34GF,115 offers identical electrical performance but differs in mechanical form factor - its SOT1089 XSON8 variant provides the smallest footprint (1.0 mm × 1.45 mm) and lowest profile (0.5 mm), making it optimal for ultra-thin wearable or implantable electronics where vertical clearance is constrained.

Availability

74LVC3G34GF,115 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, consumer IoT sensor hubs, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC3G34GF,115 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 with emphasis on reliability, efficiency, and miniaturization for industrial, automotive, and computing markets.

The 74LVC series targets low-voltage, high-speed general-purpose logic applications - specifically engineered for mixed-supply system interfacing, power-sensitive portable devices, and thermally demanding environments where robustness and signal integrity are critical.

FAQ

What is the function of the IOFF feature in 74LVC3G34GF,115?

The IOFF (power-off protection) circuit disables all outputs when VCC drops to 0 V, limiting off-state leakage current to ±2 μA. This prevents backflow current from live downstream circuits into the unpowered IC - essential for hot-swap connectors, multi-rail power sequencing, and battery-backed subsystems where uncontrolled current paths could damage components or drain backup power sources.

Can 74LVC3G34GF,115 safely interface a 5 V microcontroller output with a 1.8 V FPGA input?

Yes - its inputs tolerate up to 5.5 V regardless of VCC, so a 5 V signal applied to any input (1A/2A/3A) will not damage the device when VCC = 1.8 V. The output swings rail-to-rail (0 V to 1.8 V), matching the FPGA's input threshold. No external resistors or translators are needed, provided the FPGA input does not exceed its absolute max input voltage rating.

Does 74LVC3G34GF,115 require external pull-up or pull-down resistors on unused inputs?

No - unused inputs may be left floating only if the system guarantees they remain within valid logic thresholds. However, best practice is to tie them to VCC or GND using 10 kΩ resistors. Schmitt-trigger inputs reduce sensitivity to noise, but unconnected pins can still pick up EMI or cause increased ICC due to intermediate voltage states; intentional termination ensures deterministic behavior and lowest static power.

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

Schmitt-trigger inputs provide hysteresis - typically ~0.3 V - meaning the rising threshold (V_T+) is higher than the falling threshold (V_T−). This prevents oscillation when input signals cross the logic threshold slowly or contain noise near the switching point. For example, a noisy 3.3 V signal with ±0.4 V ripple would toggle a standard buffer multiple times, but the Schmitt version cleanly transitions once per edge, eliminating false triggers in motor-drive feedback or switch debounce applications.