Diodes Incorporated 74LVC2G38HK3-7

Overview

74LVC2G38HK3-7 from Diodes Incorporated is a dual 2-input NAND gate with open-drain outputs in an X2-DFN1410-8 package, operating from 1.65V to 5.5V supply, sinking up to 24mA at 3.3V, featuring IOFF partial-power-down protection and Schmitt-trigger inputs with ~100mV hysteresis-used for voltage-level shifting between mixed-voltage logic domains in portable computing interfaces.

For engineers reviewing the 74LVC2G38HK3-7 datasheet, 74LVC2G38HK3-7 pinout, 74LVC2G38HK3-7 application, or 74LVC2G38HK3-7 equivalent, this device is selected for low-voltage logic interfacing where bidirectional level translation, power-down isolation, and noise-immune input timing are required in space-constrained embedded systems.

Technical Context

This device implements two independent NAND gates, each with open-drain output requiring external pull-up for HIGH-level assertion. Its IOFF circuitry disables both outputs when VCC = 0V, blocking back-current flow during partial power-down sequences in multi-rail systems.

All inputs include Schmitt-trigger action (typ. 100mV hysteresis at 3.0V), enabling robust operation with slow-rising signals such as reset lines or GPIOs driving long traces-critical for reliable signal integrity in battery-powered peripherals.

Key Specifications

Pinout & Package

X2-DFN1410-8 package: 1.35mm × 1.0mm × 0.35mm body, 0.4mm lead pitch, exposed thermal pad, bottom-side solderable terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual open-drain NAND gate applications.

Compared with SN74LVC2G38DCKR and 74AUP2G38GM,115, the 74LVC2G38HK3-7 uniquely balances ultra-small size (1.35mm × 1.0mm), guaranteed IOFF protection, and full 1.65–5.5V interoperability-making it optimal for next-gen portable electronics requiring mixed-voltage signal conditioning in minimal area.

Availability

74LVC2G38HK3-7 is available at Aetrix Electronics and suitable for USB OTG detection, I²C level translation, and power-down isolation requiring stable component supply in high-volume portable electronics manufacturing.

Supply support for 74LVC2G38HK3-7 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, industrial, and automotive markets.

The 74LVC logic family delivers advanced low-voltage CMOS performance with robust ESD and latch-up immunity, designed specifically for mixed-signal interfacing and power-aware system architectures in portable and IoT edge devices.

FAQ

Can 74LVC2G38HK3-7 drive a standard I²C bus directly?

Yes-it supports I²C bus operation via its open-drain outputs, which comply with I²C electrical specifications when paired with appropriate pull-up resistors. At VCC = 3.3V, it sinks up to 24mA, exceeding the 3mA requirement for standard-mode I²C, and its 100mV input hysteresis improves noise margin on shared SDA/SCL lines.

What happens to the outputs when VCC is disconnected?

When VCC drops to 0V, the IOFF circuit activates, placing both 1Y and 2Y outputs in high-impedance state. This prevents back-current flow from pulled-up bus lines into the unpowered device, protecting downstream circuitry during partial power-down sequences in multi-rail systems.

Is the X2-DFN1410-8 package compatible with standard reflow profiles?

Yes-the X2-DFN1410-8 package is qualified for IPC/JEDEC J-STD-020D-compliant reflow profiles, including peak temperatures up to 260°C. Its 0.4mm lead pitch and exposed thermal pad require precise stencil design (0.12mm thickness, 1:1 aperture ratio) and nitrogen-assisted reflow for void-free solder joints.

Do inputs require external pull-ups when unused?

Yes-per datasheet Note 9, unused inputs must be held at VCC or GND to prevent floating states that increase ICC and risk metastability. Leaving inputs unconnected may cause excessive supply current (up to 5,000μA ΔICC) and unpredictable output behavior due to internal capacitance coupling.