Nexperia USA Inc. 74LVC1G240GSH

Overview

74LVC1G240 from Nexperia is a single-channel inverting buffer/line driver with 3-state output and output enable (OE) control, operating across 1.65 V to 5.5 V supply, supporting mixed-voltage translation between 3.3 V and 5 V systems, featuring ±24 mA drive at 3.0 V, Schmitt-trigger inputs for noise immunity, and IOFF partial power-down protection.

For engineers reviewing the 74LVC1G240 datasheet, 74LVC1G240 pinout, 74LVC1G240 application, or 74LVC1G240 equivalent, this device serves as a compact logic-level translator and bus interface driver in space-constrained industrial I/O, sensor signal conditioning, and low-power microcontroller peripheral expansion circuits.

Technical Context

The 74LVC1G240 implements a single inverting buffer stage with active-low 3-state control via OE: when OE is HIGH, Y enters high-impedance OFF-state; when OE is LOW, Y = NOT(A). Its Schmitt-trigger inputs tolerate slow-rising/falling signals and reject noise, while the IOFF circuit disables outputs during power-down to prevent backflow current.

All input pins are overvoltage tolerant up to 5.5 V regardless of VCC, enabling direct interfacing with 5 V TTL or CMOS sources even when powered at 1.65 V–2.7 V. The device complies with JEDEC standards JESD8-7, JESD8-5, JESD8C, and JESD36 across its full voltage range.

Key Specifications

Pinout & Package

74LVC1G240 is available in four miniature packages: TSSOP5 (SOT353-1), XSON6 (SOT886/SOT1202), and X2SON5 (SOT1226-3). Pin functions are consistent across variants; SOT353-1 and SOT1226-3 use 5-pin mapping, while SOT886 and SOT1202 use 6-pin layout with one no-connect terminal.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting buffer/line driver applications.

Compared with SN74LVC1G04DBVR and 74LVC1G125GW, the 74LVC1G240 uniquely combines inversion, 3-state control, and Schmitt-trigger inputs in a single 5-pin package - essential for noise-prone sensor interfaces requiring both polarity flip and bus arbitration.

Availability

74LVC1G240 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO expansion, automotive body control modules, and IoT edge node signal conditioning requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74LVC1G240 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-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74LVC1G240 belongs to Nexperia's LVC logic family, designed specifically for low-voltage, high-speed, mixed-signal interfacing in space- and power-constrained embedded systems.

FAQ

Can the 74LVC1G240 drive a 50 pF load at 10 MHz while maintaining signal integrity?

Yes. At VCC = 3.3 V and CL = 50 pF, the typical propagation delay is 2.1 ns with 4.5 ns max, and output rise/fall times remain under 2.5 ns. With ±24 mA drive capability and 25 pF CPD, it delivers clean edges into 50 pF loads at 10 MHz without overshoot or excessive ringback when properly decoupled and routed.

Does the 74LVC1G240 support hot-swap insertion into a live 3.3 V bus?

Yes. The IOFF circuit actively disables outputs when VCC = 0 V, limiting backflow current to ±2 μA maximum even if A, OE, or Y are driven externally at 5.5 V. This meets IEC 61000-4-2 Level 4 ESD robustness and enables safe hot-plug operation in modular backplane systems.

What is the minimum supply voltage at which the 74LVC1G240 guarantees correct logic operation?

The device is fully specified down to 1.65 V per JEDEC JESD8-7. At this voltage, VIH is guaranteed ≥0.65 × VCC (≥1.07 V), VIL ≤0.35 × VCC (≤0.58 V), and VOL ≤0.45 V at 4 mA sink - ensuring noise margins >300 mV and reliable operation with 1.8 V microcontrollers and sensors.

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

The Schmitt-trigger input provides ~0.3 V hysteresis at 3.3 V, meaning the rising threshold is ~1.8 V and falling threshold is ~1.5 V. This prevents multiple toggles on slow or noisy edges - such as those from mechanical switches, long cables, or PWM-driven solenoids - ensuring one clean transition per event and eliminating false interrupts or glitches.