Nexperia USA Inc. 74LVC1G38GW,125

Overview

74LVC1G38GW,125 from Nexperia is a single 2-input NAND gate with open-drain output, designed for level translation between 3.3 V and 5 V logic domains. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and operates across 1.65 V to 5.5 V supply. Used in I²C bus pull-up control, GPIO expansion interfaces, and mixed-voltage sensor signal conditioning.

For engineers reviewing the 74LVC1G38GW,125 datasheet, 74LVC1G38GW,125 pinout, 74LVC1G38GW,125 application, or 74LVC1G38GW,125 equivalent, this device serves as a compact, temperature-robust logic translator requiring no external biasing, supporting industrial-grade operation from −40 °C to +125 °C with verified 5 V-tolerant inputs and ±24 mA sink capability at 3.0 V.

Technical Context

The 74LVC1G38GW implements standard NAND logic (Y = NOT(A AND B)) with an open-drain output that requires an external pull-up resistor. Its Schmitt-trigger inputs provide hysteresis (typically 0.3 V at VCC = 3.3 V), enabling reliable operation with slow-rising signals such as those from mechanical switches or long PCB traces.

IOFF circuitry actively disables the output when VCC = 0 V, blocking backflow current during hot insertion or partial system power-down - critical for PCIe add-in cards, modular PLC I/O modules, and battery-backed subsystems where rail sequencing is non-uniform.

Key Specifications

Pinout & Package

TSSOP5 (SOT353-1) package: plastic thin shrink small outline, 5-lead, 1.25 mm body width, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input NAND gate applications.

Compared with SN74LVC1G38DBVR, the 74LVC1G38GW,125 offers superior thermal performance and automated assembly compatibility; versus 74AUP1G38GW,125, it trades ultra-low ICC for essential 5 V input support in industrial control hubs.

Availability

74LVC1G38GW,125 is available at Aetrix Electronics and suitable for industrial sensor interfaces, I²C bus arbitration, GPIO expansion logic, and hot-swappable module control requiring stable component supply across extended temperature ranges.

Supply support for 74LVC1G38GW,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 focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC1G38 belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage interoperability, low dynamic power, and industrial-grade reliability in space-constrained applications.

FAQ

What pull-up resistor value should be used with the 74LVC1G38GW,125 open-drain output?

For 3.3 V systems, a 4.7 kΩ pull-up ensures VOL ≤ 0.55 V at 24 mA sink; for 5 V buses, 10 kΩ maintains VOL ≤ 0.8 V. Values below 2.2 kΩ risk exceeding total power dissipation (250 mW) at high duty cycles. Always verify rise time against bus capacitance using t_r ≈ 0.35 × R × C.

Can the 74LVC1G38GW,125 safely interface a 5 V microcontroller output to a 1.8 V FPGA input?

No - while inputs tolerate 5 V, the output cannot drive 1.8 V logic HIGH without additional level shifting. The open-drain output only sinks current; its HIGH state depends on the external pull-up voltage. To drive 1.8 V logic, the pull-up must connect to 1.8 V, limiting maximum output voltage to that rail.

Does the IOFF feature require any external circuitry to function?

No - IOFF is fully internal and activates automatically when VCC drops below ~0.5 V. No external enable pins, resistors, or capacitors are needed. The output transitions to high-impedance within nanoseconds of VCC collapse, preventing backfeed into powered-down sections without design overhead.

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

Schmitt-trigger inputs provide ~0.3 V hysteresis (difference between VIH and VIL thresholds), rejecting noise spikes smaller than this window. For example, at VCC = 3.3 V, VIH ≈ 2.0 V and VIL ≈ 0.8 V - ensuring stable switching even with 1.0 V p-p ringing on long cables or unshielded sensor lines, unlike standard gates that may oscillate near threshold.