Diodes Incorporated 74LVC1G34FZ4-7

Overview

74LVC1G34FZ4-7 from Diodes Incorporated is a single non-inverting CMOS buffer gate with push-pull output, designed for voltage-level translation and signal conditioning in mixed-voltage digital systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs regardless of supply, delivers ±24mA drive at 3.3V, and supports partial power-down via IOFF circuitry-enabling safe isolation in powered-down subsystems of portable computing and consumer electronics.

For engineers reviewing the 74LVC1G34FZ4-7 datasheet, 74LVC1G34FZ4-7 pinout, 74LVC1G34FZ4-7 application, or 74LVC1G34FZ4-7 equivalent, key selection criteria include its 5.5V-tolerant inputs, IOFF-enabled power-down leakage (<±10μA), 4.2ns typical propagation delay at 3.3V, ±24mA output drive, and compatibility with TTL logic levels across supply voltages.

Technical Context

This device implements a basic positive Boolean function (A = Y) using low-power CMOS technology, with input thresholds scaled to VCC for robust noise immunity across 1.65–5.5V operation. Its IOFF circuit actively disables the output stage during VCC = 0V, preventing back-current flow into powered-down rails-a critical requirement for hot-swap and multi-rail power sequencing.

The buffer features 5.5V-tolerant inputs independent of VCC, enabling direct interfacing between 1.8V/2.5V/3.3V logic domains and 5V peripherals without external level shifters. ESD protection exceeds 2kV HBM and 1kV CDM, and latch-up immunity exceeds 100mA per JESD78 Class I.

Key Specifications

Pinout & Package

X2-DFN1410-6 is a 6-pin, 1.4mm × 1.0mm, 0.4mm pitch, bottom-terminal chip-scale package with exposed thermal pad; pin 1 marked by chamfered corner. Designed for high-density PCB layouts and improved thermal performance over SOT variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-buffer gate applications.

Compared with SN74LVC1G34DBVR and 74LVC1G34FW4-7, the 74LVC1G34FZ4-7 offers superior thermal dissipation (θJA = 460°C/W) in a 1.4mm × 1.0mm footprint optimized for automated placement, while retaining identical IOFF, 5.5V-tolerant input, and ±24mA drive specifications.

Availability

74LVC1G34FZ4-7 is available at Aetrix Electronics and suitable for USB peripheral interface, mobile SoC power sequencing, and industrial sensor hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74LVC1G34FZ4-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance, energy-efficient solutions for consumer, computing, industrial, and automotive markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing with emphasis on mixed-supply compatibility, power-down safety, and small-footprint packaging for space-constrained electronics.

FAQ

Can 74LVC1G34FZ4-7 be used with a 1.5V supply?

No. The absolute minimum recommended operating voltage is 1.65V per the datasheet's Recommended Operating Conditions table. At 1.5V, the device enters data retention mode only-output drive, propagation delay, and logic thresholds are not guaranteed, and functionality may fail unpredictably.

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

Based on the 16pF power dissipation capacitance (CPD) and ±24mA output drive at 3.3V, the buffer can reliably drive up to 30pF of total load capacitance-including trace, via, and input capacitance-while maintaining ≤5.5ns propagation delay and signal integrity per the switching characteristics table.

Does the IOFF feature require external biasing or control signals?

No. IOFF is fully automatic and requires no external configuration: when VCC drops to 0V or near-zero, the internal circuitry disables both output FETs, presenting a high-impedance state regardless of input voltage (up to 5.5V) or output load conditions.

Is the X2-DFN1410-6 package lead-free and RoHS compliant?

Yes. The 74LVC1G34FZ4-7 uses NiPdAu (nickel-palladium-gold) terminal finish and is fully RoHS 3 compliant (2015/863/EU), halogen- and antimony-free, with bromine and chlorine content below 900ppm each and antimony below 1000ppm.