Nexperia USA Inc. 74LVC240AD,118

Overview

74LVC240AD,118 from Nexperia is an octal inverting 3-state buffer/line driver with dual independent output enables (1OE, 2OE), 5 V tolerant inputs/outputs, Schmitt-trigger inputs, and IOFF partial power-down protection. It operates from 1.2 V to 3.6 V supply, supports mixed-voltage translation between 3.3 V and 5 V systems, and is rated for -40 °C to +125 °C. Used in address/data bus buffering and level-shifting in industrial microcontroller interfaces.

For engineers reviewing the 74LVC240AD,118 datasheet, 74LVC240AD,118 pinout, 74LVC240AD,118 application, or 74LVC240AD,118 equivalent, key selection criteria include 3-state timing (tpd ≤ 5.5 ns at 3.3 V), dual OE control per 4-bit group, 5.5 V input tolerance, IOFF leakage < ±10 μA at VCC = 0 V, and SO20 package compatibility with legacy PCB footprints.

Technical Context

This device implements two independent 4-bit inverting buffers, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3). All eight inputs feature Schmitt-trigger action, enabling robust noise immunity with slow-rising signals. The IOFF circuit actively disables outputs during power-down, blocking backflow current when VCC = 0 V and inputs/outputs are driven to 5.5 V.

It complies with JEDEC standards JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V), and meets HBM ESD > 2000 V and CDM > 1000 V. Propagation delay is specified down to 1.2 V supply, with tpd = 16 ns (min) at VCC = 1.2 V and 2.6 ns (typ) at VCC = 3.3 V.

Key Specifications

Pinout & Package

74LVC240AD,118 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Pin 1 index located at top-left corner with notch marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.

Compared with SN74LVC240APWR and 74LVC240ABQ,115, the 74LVC240AD,118 offers optimal balance of manufacturability (SO20 gull-wing leads), thermal headroom (12.3 mW/K derating), and serviceability - making it preferred for industrial control modules requiring field repairability and long-term component availability.

Availability

74LVC240AD,118 is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, automotive body control modules, test equipment I/O expansion, and medical imaging interface designs requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 74LVC240AD,118 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, with manufacturing rooted in process technology leadership and automotive-grade quality systems.

The 74LVC240A belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, designed specifically for energy-efficient, mixed-voltage interfacing in industrial automation, automotive electronics, and communications infrastructure where robustness, wide supply range, and 5 V tolerance are mandatory.

FAQ

Can 74LVC240AD,118 operate with VCC = 1.2 V while driving 5 V inputs?

Yes. The device is fully specified from 1.2 V to 3.6 V supply and accepts input voltages up to 5.5 V regardless of VCC level. At VCC = 1.2 V, VIH is guaranteed ≥ 1.08 V and VIL ≤ 0.12 V, ensuring reliable recognition of TTL- and CMOS-compatible logic levels even with 5 V sources. Input clamp current remains within ±50 mA limits.

What is the maximum capacitive load the outputs can drive at 3.3 V supply?

At VCC = 3.3 V, the outputs can reliably drive up to 50 pF loads with guaranteed timing: tpd ≤ 5.5 ns (max), ten ≤ 7.0 ns (max), and tdis ≤ 7.5 ns (max), per Table 7. This aligns with standard test conditions using 500 Ω termination and 50 pF total load (including probe/jig capacitance). For heavier loads, propagation delay increases linearly with CL.

Does the SO20 package (SOT163-1) support reflow and wave soldering?

Yes. The SO20 package is qualified for both lead-free reflow (JEDEC J-STD-020, peak 260 °C) and wave soldering (JEDEC J-STD-002, 260 °C for 10 s). Its 1.27 mm pitch and gull-wing geometry provide strong solder joint reliability and visual inspection capability - critical for industrial and automotive repair workflows.

How does IOFF behavior differ from standard high-impedance 3-state mode?

IOFF activates only when VCC = 0 V and disables outputs *regardless of OE state*, blocking current flow between powered inputs/outputs and the unpowered device. Standard 3-state relies on functional VCC and active OE control. IOFF is a hardware safety feature preventing back-current damage during power sequencing faults or hot-swap events - verified to limit leakage to ±10 μA at 5.5 V bias.