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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

NXP Semiconductors 74LVC240ADB,118

Name: 74LVC240ADB,118
Brand: NXP Semiconductors
SKU: 74LVC240ADB,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC240ADB,118

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 74LVC240ADB,118.pdf

Description:: IC INVERTER DUAL 4-INPUT 20SSOP

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Product details

Overview

74LVC240ADB,118 from Nexperia is an octal inverting 3-state buffer/line driver with dual independent output enables (1OE, 2OE), 1.2 V to 3.6 V supply operation, 5.5 V tolerant inputs/outputs, and Schmitt-trigger inputs for noise immunity. It supports mixed-voltage translation between 3.3 V and 5 V systems and is rated for operation from −40 °C to +125 °C in SO20 (SOT163-1) package.

For engineers reviewing the 74LVC240ADB,118 datasheet, 74LVC240ADB,118 pinout, 74LVC240ADB,118 application, or 74LVC240ADB,118 equivalent, key selection criteria include 3-state timing (enable/disable delays), IOFF power-down protection, input overvoltage tolerance, propagation delay at 3.3 V, and SO20 thermal derating behavior.

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). Each buffer section drives four outputs with identical logic inversion and 3-state control. The IOFF circuit ensures zero backflow current during partial power-down, meeting JEDEC JESD78 requirements.

Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), enabling robust operation with slow-rising signals. All I/O pins tolerate up to 5.5 V regardless of VCC, allowing direct interfacing with legacy 5 V logic while powered from 1.65 V–3.6 V supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	1.2 V to 3.6 V - Enables low-power operation in battery-powered and mixed-supply systems.
Input voltage tolerance	−0.5 V to +5.5 V - Allows safe connection to 5 V sources without level shifters in mixed-voltage designs.
Propagation delay (VCC = 3.3 V)	2.6 ns typ. - Supports high-speed bus buffering up to ~150 MHz clock domains with tight skew control.
Enable/disable time (VCC = 3.3 V)	2.9 ns typ. (ten), 2.9 ns typ. (tdis) - Ensures fast bus arbitration and clean signal gating in shared-data applications.
IOFF leakage (VCC = 0 V)	±10 μA max - Prevents damaging back-current when one side of a bus is powered down while the other remains active.
Operating temperature	−40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC I/O, and telecom base station interfaces.
ESD rating (HBM)	>2000 V - Meets IEC 61000-4-2 Level 2 system-level ESD immunity requirements without external protection.

Pinout & Package

74LVC240ADB,118 is supplied in SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, with standard 1.27 mm lead pitch. Pin 1 index located at top-left corner; leads are gull-wing, surface-mount compatible.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1OE, 2OE	Active-low output enables - Independently disable Group 1 (pins 12,14,16,18) or Group 2 (pins 3,5,7,9) outputs to high-impedance state.
2,4,6,8	1A0–1A3	Inverting data inputs for first 4-bit buffer - Drive corresponding 1Yn outputs with logical inversion.
17,15,13,11	2A0–2A3	Inverting data inputs for second 4-bit buffer - Drive corresponding 2Yn outputs with logical inversion.
18,16,14,12	1Y0–1Y3	Inverting buffered outputs for first group - Output impedance < 20 Ω at VCC = 3.3 V, IO = ±24 mA.
3,5,7,9	2Y0–2Y3	Inverting buffered outputs for second group - Electrically isolated from Group 1; share no internal coupling paths.
10	GND	Ground reference - Must be connected to system 0 V plane; decoupling capacitor recommended within 5 mm.
20	VCC	Positive supply - Requires local 100 nF ceramic bypass capacitor; voltage must remain within 1.2–3.6 V during all operation.

Key Features

Feature	Design Value
5.5 V tolerant I/O	Enables direct interface with 5 V microcontrollers, FPGAs, or legacy peripherals without external level translators.
IOFF partial power-down	Blocks current flow between powered/unpowered sections - critical for hot-swap and modular backplane designs.
Schmitt-trigger inputs	Provides ≥0.3 V hysteresis at 3.3 V - eliminates false triggering from noisy or slow-rising signals on long PCB traces.
JEDEC-compliant voltage ranges	Validated per JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) - ensures interoperability across vendor logic families.
Low dynamic power	CPD = 8.1 pF at 3.3 V - reduces switching power in high-frequency bus drivers; enables >100 MHz operation with <1 mW per buffer.

Applications

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Buffering sensor data lines from multiple analog front-ends to a central MCU via shared 3.3 V SPI/I²C bus.

IC Role / Device Role / Timing Role: Inverting 3-state line driver isolating fault-prone sensor nodes; enables selective bus disconnection during diagnostics.

Use Value: IOFF prevents backfeed into unpowered sensor submodules; 5.5 V tolerance accommodates 5 V Hall-effect sensors without level-shifting components.

Use Scenario: Driving LED status indicators and relay coils from a 3.3 V automotive microcontroller in a door module.

IC Role / Device Role / Timing Role: Octal inverting buffer translating MCU GPIO logic to higher-current outputs; dual OE allows grouped activation of lighting zones.

Use Value: −40 °C to +125 °C rating ensures reliability in cabin/exterior environments; Schmitt inputs reject noise from motor actuation transients.

Test Equipment Digital Pattern Generator

Medical Diagnostic Imaging Interface

Use Scenario: Generating synchronized digital stimulus patterns across 8 parallel channels for IC functional testing.

IC Role / Device Role / Timing Role: Precision timing buffer with matched propagation delay (≤1.0 ns skew) ensuring simultaneous edge delivery to DUT pins.

Use Value: 2.6 ns typical tpd at 3.3 V enables ≤385 MHz pattern rates; low CPD minimizes jitter accumulation across multi-stage fanout.

Use Scenario: Isolating FPGA-based image processing logic from legacy 5 V video DACs and display controllers in ultrasound equipment.

IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional bus interface - accepts 5 V video sync signals while driving 3.3 V pixel clock distribution.

Use Value: Dual OE permits dynamic reconfiguration of video channel routing; HBM >2000 V protects against ESD events during clinical handling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC240APWR	TSSOP20 (SOT360-1) package; 0.65 mm pitch; 4.4 mm width - lower profile but higher thermal resistance (10.0 mW/K above 100 °C).	Better PCB space efficiency; less suitable for high-power continuous drive due to reduced heatsinking vs. SO20.	Select when board height is constrained and average output loading is ≤12 mA per pin.
74LVC240ABQ,115	DHVQFN20 (SOT764-1) package; 2.5 × 4.5 × 0.85 mm; exposed thermal pad - superior thermal performance (12.9 mW/K above 111 °C).	Required for sustained 24 mA per output at +125 °C ambient; needs solder paste stencil design for thermal pad.	Select for high-density, thermally demanding applications such as compact motor drives or radar front-ends.

Compared with SN74LVC240APWR and 74LVC240ABQ,115, the 74LVC240ADB,118 offers optimal manufacturability in standard SO20 assembly lines, balanced thermal performance for intermittent loads, and lowest risk of tombstoning during reflow - making it preferred for high-volume industrial control boards.

Availability

74LVC240ADB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and medical diagnostic imaging interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC240ADB,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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for power, space, and reliability constraints.

The 74LVC240A series belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, designed specifically for robust mixed-voltage interfacing in industrial automation, automotive electronics, and test instrumentation where signal integrity and power-down safety are critical.

FAQ

What is the maximum output current per pin for 74LVC240ADB,118 at 3.3 V supply?

At VCC = 3.3 V, the device supports ±24 mA DC output current per pin in HIGH or LOW state, verified across −40 °C to +125 °C. This rating assumes proper PCB copper area for heat dissipation and does not exceed the total package power limit of 500 mW.

Can 74LVC240ADB,118 safely interface a 5 V microcontroller with a 3.3 V FPGA?

Yes - all inputs tolerate up to 5.5 V regardless of VCC, so 5 V MCU outputs can directly drive 74LVC240ADB,118 inputs. Outputs swing rail-to-rail (0 V to VCC), so with VCC = 3.3 V, they deliver valid 3.3 V logic levels to the FPGA, enabling seamless bidirectional voltage translation.

Does 74LVC240ADB,118 require external pull-up or pull-down resistors on its output enable pins?

No - 1OE and 2OE have internal weak pull-downs (typ. 100 kΩ) that ensure defined LOW state when left floating. However, for deterministic startup behavior in systems with noisy reset sequences, a 10 kΩ external pull-down is recommended to guarantee immediate 3-state assertion at power-on.

How does the IOFF feature behave when VCC is disconnected but 5 V signals remain present on inputs/outputs?

When VCC = 0 V, the IOFF circuit disables all outputs and isolates input/output paths, limiting leakage to ±10 μA maximum even with 5.5 V applied to any I/O pin. This prevents destructive current flow between powered and unpowered subsystems - a requirement for hot-pluggable backplanes and modular power architectures.

74LVC240ADB,118 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74LVC

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

74LVC240ADB,118 FAQ

1.How can I place an order for 74LVC240ADB,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC240ADB,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74LVC240ADB,118 reliable?

The price and inventory of 74LVC240ADB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC240ADB,118 is usually 5 days.

3.What payment methods are accepted for 74LVC240ADB,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC240ADB,118 transactions.

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4.How is shipping managed for 74LVC240ADB,118?

74LVC240ADB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC240ADB,118 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74LVC240ADB,118?

For technical support, including 74LVC240ADB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC240ADB,118 requirements.

6.How does Aetrix verify that 74LVC240ADB,118 is sourced from the original manufacturer or authorized distributors?

All 74LVC240ADB,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74LVC240ADB,118 meets industry standards.

7.What is the process for return or replacement of 74LVC240ADB,118?

All 74LVC240ADB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC240ADB,118, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74LVC240ADB,118 part is unused and in its original packaging.

Return procedure for 74LVC240ADB,118:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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