Nexperia USA Inc. 74LVC2G240GM,125

Overview

74LVC2G240GM,125 from Nexperia is a dual inverting buffer/line driver with 3-state outputs, designed for level translation between 3.3 V and 5 V logic domains. It features Schmitt-trigger inputs for noise immunity, ±24 mA output drive at 3.0 V, IOFF circuitry for partial power-down protection, and operates across 1.65 V to 5.5 V supply. It is used in bidirectional bus interface circuits in industrial control I/O modules.

For engineers reviewing the 74LVC2G240GM,125 datasheet, 74LVC2G240GM,125 pinout, 74LVC2G240GM,125 application, or 74LVC2G240GM,125 equivalent, key selection criteria include 3-state enable timing (ten ≤ 5.0 ns at 5 V), input voltage tolerance up to 5.5 V, IOFF leakage < ±2 μA during power-down, and compatibility with TSSOP8 footprint constraints in space-constrained PCB layouts.

Technical Context

The device implements two independent inverting buffers, each with active-low 3-state enable (1OE, 2OE) controlling high-impedance output states. Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at 3.3 V), enabling robust operation with slow-rising signals from microcontrollers or sensors.

All inputs tolerate 5 V regardless of VCC (1.65–5.5 V), allowing direct interfacing with legacy 5 V TTL or CMOS logic while driving 3.3 V loads. The IOFF feature disables outputs and blocks backflow current when VCC = 0 V, supporting hot-swap and mixed-voltage system power sequencing.

Key Specifications

Pinout & Package

XQFN8 package (SOT902-2): plastic ultra-thin quad flat no-lead, 8-terminal, body size 1.4 × 1.2 × 0.5 mm, wettable flank leads for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual inverting buffer applications.

Compared with SN74LVC2G240DBVR, the 74LVC2G240GM,125 saves 40% board area and improves thermal resistance in compact enclosures; versus 74AUP2G240GM,125, it trades higher quiescent current for essential 5 V interoperability in industrial backplanes.

Availability

74LVC2G240GM,125 is available at Aetrix Electronics and suitable for industrial I/O expansion, automotive body control modules, USB-C power delivery interfaces, and medical sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74LVC2G240GM,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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC2G240 belongs to Nexperia's LVC logic family, engineered for robust mixed-voltage interoperability, low-power operation, and extended temperature performance in mission-critical embedded control systems.

FAQ

What is the maximum clock frequency supported by the 74LVC2G240GM,125?

The device does not operate as a clocked element but as a combinatorial buffer. Its propagation delay is 2.0 ns typical at 5 V, supporting data rates up to 250 Mbps in point-to-point signaling. Timing is governed by tpd, ten, and tdis-not clock frequency-making it suitable for asynchronous bus interfaces and control signal routing rather than synchronous clock distribution.

Can the 74LVC2G240GM,125 drive a 50 Ω transmission line directly?

Yes. At VCC = 3.0 V, it delivers ±24 mA output drive, sufficient to drive a 50 Ω line terminated to VCC/2 with <1 V undershoot/overshoot. Measured VOL = 0.55 V and VOH = 2.3 V under 24 mA load confirm rail-compatible swing. For longer traces, series termination at the source is recommended to suppress reflections.

Does the 74LVC2G240GM,125 require external pull-up or pull-down resistors on its enable pins?

No. The 1OE and 2OE inputs have CMOS-compatible thresholds and negligible leakage (<±0.1 μA). When driven actively by an MCU GPIO or logic gate, external biasing is unnecessary. However, if left floating during power-up, unintended output activation may occur; best practice is to tie OE pins LOW via MCU initialization or a 100 kΩ pull-down for fail-safe default OFF-state.

How does the IOFF feature behave when VCC is ramping during power-up?

IOFF activates when VCC falls below ~0.8 V and remains active until VCC exceeds ~1.2 V. During this window, output leakage is limited to ±2 μA maximum, preventing back-current into powered downstream circuits. This behavior is verified across −40 °C to +125 °C and ensures safe power sequencing in multi-rail systems without external isolation switches.