Diodes Incorporated 74LVC1G07QW5-7

Overview

74LVC1G07QW5-7 from Diodes Incorporated is an automotive-grade single buffer IC with open-drain output, designed for level-shifting and signal isolation in mixed-voltage systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs regardless of V_CC, supports IOFF partial power-down, and delivers 32mA sink current at 5V. Used in automotive body control modules for wake-up signal conditioning.

For engineers reviewing the 74LVC1G07QW5-7 datasheet, 74LVC1G07QW5-7 pinout, 74LVC1G07QW5-7 application, or 74LVC1G07QW5-7 equivalent, key selection criteria include open-drain drive strength, AEC-Q100 Grade 1 qualification, IOFF leakage performance, and SOT25 thermal resistance (θ_JA = 184°C/W).

Technical Context

This device implements a single non-inverting buffer with open-drain output, enabling wired-OR logic and bidirectional voltage translation. Its IOFF circuit actively disables output leakage during power-down, meeting AEC-Q100 requirements for automotive subsystems with staggered supply sequencing.

Input voltage tolerance up to 5.5V independent of V_CC allows interfacing between 3.3V controllers and 5V peripherals. Propagation delay ranges from 0.5ns (typ) at 5V to 2.6ns (typ) at 1.8V, supporting timing-critical wake-up and enable signaling.

Key Specifications

Pinout & Package

SOT25 (3.0mm × 2.8mm × 1.2mm, 0.95mm pitch) surface-mount package with exposed pad not present; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-drain buffer applications.

Compared with SN74LVC1G07DBVR and NX1LZ07GW,125, the 74LVC1G07QW5-7 uniquely balances AEC-Q100 compliance, SOT25 thermal efficiency (θ_JA = 184°C/W), and 0.95mm pitch manufacturability - making it optimal for automotive ECU designs requiring both reliability and assembly yield.

Availability

74LVC1G07QW5-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, and medical diagnostic equipment requiring stable component supply across extended temperature and long production lifecycles.

Supply support for 74LVC1G07QW5-7 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-reliability solutions for automotive, industrial, and computing markets.

The 74LVC logic family targets low-voltage, mixed-signal interface applications with emphasis on voltage translation, power sequencing, and AEC-Q100-compliant signal conditioning in harsh environments.

FAQ

Can the 74LVC1G07QW5-7 be used without an external pull-up resistor?

No. The open-drain output requires an external pull-up resistor to define the high-state voltage level. Without it, the Y pin remains floating and cannot assert a logic HIGH. Typical values range from 1kΩ (for speed-critical 5V buses) to 10kΩ (for low-power 3.3V interfaces), selected based on rise time and current budget.

What happens to the output during power-down when V_CC = 0V?

When V_CC drops to 0V, the IOFF circuit activates and isolates the output terminal (Y), limiting leakage current to ±2μA maximum. This prevents damaging back-current flow from other powered rails into the unpowered device, satisfying AEC-Q100 partial power-down requirements.

Is the NC pin on the SOT25 package electrically isolated?

Yes. Pin 5 (NC) is internally unconnected - no bond wire or silicon node links to it. It must remain unconnected on the PCB: no trace, no via, no solder mask opening. Routing near it is permitted, but grounding or biasing violates the device's validated layout and may affect ESD performance.

How does input voltage tolerance work when V_CC = 1.8V but VI = 5V?

The input structure uses gate-oxide protected CMOS inputs with clamp diodes referenced to V_CC. At V_CC = 1.8V, the 5V input forward-biases the upper clamp diode, sinking current into V_CC. The datasheet guarantees safe operation because internal current limiting holds IIK ≤ –50mA, and V_CC supply absorbs the transient without damage.