Nexperia USA Inc. 74LVC2G38GXX

Overview

74LVC2G38 from Nexperia is a dual 2-input NAND gate IC with open-drain outputs, 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 mixed-voltage I²C bus pull-up, GPIO expansion, and reset signal conditioning.

For engineers reviewing the 74LVC2G38 datasheet, 74LVC2G38 pinout, 74LVC2G38 application, or 74LVC2G38 equivalent, this device supports voltage translation, high-noise environments, low-power shutdown modes, and direct TTL-level interfacing - critical for embedded control, sensor interface, and industrial I/O design.

Technical Context

This logic IC implements two independent NAND gates, each with open-drain output enabling wired-AND configuration and external pull-up flexibility. The IOFF circuit actively disables outputs during power-down, blocking backflow current when VCC = 0 V.

Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), tolerating slow-rising signals up to 20 ns/V slew rate. Input overvoltage tolerance extends to 5.5 V regardless of VCC, supporting robust interfacing with legacy 5 V peripherals.

Key Specifications

Pinout & Package

Available in multiple compact packages including TSSOP8 (SOT505-2), VSSOP8 (SOT765-1), and XSON8 variants (SOT833-1, SOT1116, SOT1203, SOT1233-2). All variants are 8-terminal, surface-mount, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G00DRYR and 74LVC2G132GW, the 74LVC2G38 uniquely combines open-drain flexibility, 5 V input tolerance, and IOFF - making it the only option among the three for safe mixed-voltage bus interfacing and partial power-down integrity.

Availability

74LVC2G38 is available at Aetrix Electronics and suitable for industrial sensor nodes, I²C subsystems, and reset management circuits requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LVC2G38 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC2G38 belongs to Nexperia's LVC logic family, engineered for low-voltage operation, mixed-signal compatibility, and robustness in harsh electrical environments - targeting space-constrained, power-sensitive embedded control applications.

FAQ

Can the 74LVC2G38 be used as a level shifter between 1.8 V and 5 V logic?

Yes - its inputs tolerate up to 5.5 V regardless of VCC, and its open-drain outputs can be pulled up to any voltage ≤5.5 V. When powered at 1.8 V, it accepts 5 V inputs and drives a 5 V pull-up, enabling bidirectional translation. However, output HIGH level equals the pull-up voltage, not VCC.

What is the maximum capacitive load the 74LVC2G38 can drive reliably?

The device specifies dynamic characteristics up to 50 pF load capacitance (per Table 10) with guaranteed propagation delay. Driving >50 pF may increase tPLZ/tPZL beyond datasheet limits and reduce noise margin; for heavier loads, add a buffer stage or reduce trace length and parallel capacitance.

Does the IOFF feature work when VCC is disconnected but GND remains connected?

Yes - IOFF activates when VCC = 0 V, regardless of whether GND is present. With VCC floating or grounded and GND connected, the output remains in high-impedance state, preventing back-current. This behavior is verified per JESD78 and documented in Section 1.1 and Table 7.

How does the Schmitt-trigger input improve performance in noisy industrial environments?

The Schmitt-trigger provides ~0.3 V hysteresis (e.g., VIH ≈ 1.7 V, VIL ≈ 1.4 V at VCC = 2.5 V), rejecting noise spikes <0.3 V and preventing false toggling on slow-rising signals like those from relays or long cables. This eliminates need for external RC filtering or software debouncing in reset or status lines.