Nexperia USA Inc. 74LVC2G38GS,115

Overview

74LVC2G38GS,115 from Nexperia is a dual 2-input NAND gate with open-drain outputs, designed for level translation between 3.3 V and 5 V logic domains in mixed-voltage systems. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and operates across 1.65 V to 5.5 V supply range with ±24 mA output drive at 3.0 V. Used in I²C bus pull-up interfaces and voltage-level shifting in industrial control modules.

For engineers reviewing the 74LVC2G38GS,115 datasheet, 74LVC2G38GS,115 pinout, 74LVC2G38GS,115 application, or 74LVC2G38GS,115 equivalent, key selection criteria include open-drain compatibility with wired-AND topologies, guaranteed operation from –40 °C to +125 °C, 5 V-tolerant inputs/outputs, and XSON8 (SOT1203) package footprint for space-constrained PCB layouts.

Technical Context

This device implements two independent NAND gates with open-drain outputs, enabling wired-logic configurations and bidirectional bus interfacing. Each gate accepts inputs up to 5.5 V regardless of VCC, supporting seamless integration into heterogeneous voltage environments.

Schmitt-trigger input thresholds provide hysteresis (typically 0.3–0.5 V), ensuring robust operation with slow-rising signals. The IOFF circuit actively disables outputs during power-down, blocking backflow current when VCC = 0 V - critical for hot-swap and partial-power-down system architectures.

Key Specifications

Pinout & Package

XSON8 package (SOT1203): plastic extremely thin small outline, no leads, 8-terminal surface-mount device; body dimensions 1.35 mm × 1.0 mm × 0.35 mm; thermal pad optional; pin 1 index located at lower-left corner below marking "YB".

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC2G38GS,115, the 74LVC2G00GS lacks open-drain functionality and IOFF, limiting use to non-bus applications; SN74LVC2G38DCUR offers identical logic but trades miniaturization for assembly flexibility - critical for production scalability versus lab validation.

Availability

74LVC2G38GS,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, I²C bus translation, hot-swap module detection, and programmable logic glue requiring stable component supply across extended temperature ranges.

Supply support for 74LVC2G38GS,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 leading global semiconductor expert in discrete, logic, and MOSFET devices, headquartered in Nijmegen, Netherlands, with manufacturing in Europe and Asia.

The 74LVC series targets low-voltage, high-speed general-purpose logic applications, emphasizing voltage flexibility, power efficiency, and robustness in industrial and consumer electronics.

FAQ

Can 74LVC2G38GS,115 drive an I²C bus directly?

Yes - its open-drain outputs and 5 V-tolerant inputs/outputs make it suitable for I²C level translation. Each gate can replace one MOSFET in a bidirectional translator. External pull-up resistors are required on SDA/SCL lines, sized per bus capacitance and speed (e.g., 2.2 kΩ for 400 kHz with ≤400 pF). IOFF ensures safe operation during power sequencing.

What is the maximum capacitive load the 74LVC2G38GS,115 can drive reliably?

At VCC = 3.3 V and 25 °C, the device maintains <5.2 ns propagation delay with 50 pF load (per Table 10). For reliable 400 kHz I²C operation, total bus capacitance should remain ≤400 pF - consistent with standard I²C specification. Higher capacitance increases rise time but does not affect logic function due to open-drain architecture.

Does the 74LVC2G38GS,115 require external pull-up resistors on its outputs?

Yes - open-drain outputs cannot source current; external pull-up resistors are mandatory to establish HIGH logic level. Resistor value depends on bus speed, capacitance, and supply voltage (e.g., 10 kΩ for 100 kHz, 2.2 kΩ for 400 kHz). No internal pull-ups exist; omission results in floating HIGH states and logic failure.

How does the IOFF feature behave during power-down sequences?

When VCC drops to 0 V, the IOFF circuit disables both outputs, placing them in high-impedance state regardless of input voltage. This prevents reverse current flow from powered downstream circuits (e.g., 5 V I²C bus) into the unpowered device - protecting against latch-up and ensuring clean power sequencing in multi-rail systems.