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

Nexperia USA Inc. 74LVC240ADB,112

Name: 74LVC240ADB,112
Brand: Nexperia USA Inc.
SKU: 74LVC240ADB,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC240ADB,112

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: 74LVC240ADB,112.pdf

Description:: IC BUFFER INVERT 3.6V 20SSOP

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Product details

Overview

74LVC240ADB,112 from Nexperia is an octal inverting 3-state buffer/line driver with dual independent output enables (1OE, 2OE), 5 V-tolerant I/O, and Schmitt-trigger inputs. It operates from 1.2 V to 3.6 V supply, supports mixed-voltage translation between 3.3 V and 5 V systems, and features IOFF partial power-down protection. It is used in address/data bus buffering and level translation in industrial control and embedded interface subsystems.

For engineers reviewing the 74LVC240ADB,112 datasheet, 74LVC240ADB,112 pinout, 74LVC240ADB,112 application, or 74LVC240ADB,112 equivalent, key selection considerations include 5 V-tolerant input voltage rating (up to 5.5 V), guaranteed 3-state disable timing (tdis ≤ 7.5 ns at VCC = 3.6 V), propagation delay (tpd ≤ 5.5 ns at VCC = 3.6 V), IOFF leakage current (≤ ±20 μA at VCC = 0 V), and −40 °C to +125 °C operating range.

Technical Context

The 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 operation with slow-rising signals and noise immunity. The IOFF circuit actively disables outputs during power-down, blocking backflow current when VCC = 0 V and I/O pins are driven externally.

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 supports dynamic operation across its full 1.2–3.6 V supply range. Input thresholds scale with VCC (e.g., VIH = 0.65×VCC min at 1.65 V), while output drive strength scales with supply (e.g., VOH ≥ 2.2 V at IO = −24 mA, VCC = 3.0 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.2 V to 3.6 V - Enables direct interfacing with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains
Input Voltage Tolerance	−0.5 V to +5.5 V - Allows safe connection to 5 V sources without level shifters in mixed-voltage systems
Propagation Delay (tpd)	≤ 5.5 ns at VCC = 3.6 V - Supports high-speed bus buffering up to ~180 MHz toggle rate
3-State Disable Time (tdis)	≤ 7.5 ns at VCC = 3.6 V - Ensures clean bus release during hot-swap or multiplexed bus arbitration
IOFF Leakage Current	≤ ±20 μA at VCC = 0 V - Prevents damaging backfeed current when powered off in partial-power-down systems
Operating Temperature	−40 °C to +125 °C - Qualified for extended industrial and under-hood automotive auxiliary applications
ESD Protection	HBM > 2000 V, CDM > 1000 V - Robust handling during PCB assembly and field service

Pinout & Package

74LVC240ADB,112 is supplied in the SOT339-1 (SSOP20) package: plastic shrink small outline package, 20 leads, body width 5.3 mm, pitch 0.65 mm. Pin 1 index located at top-left corner with notch marking.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 19	Active-low output enable	Controls 1Y0–1Y3 (pins 18,16,14,12); HIGH forces high-impedance state
2OE, 1	Active-low output enable	Controls 2Y0–2Y3 (pins 3,5,7,9); independent of 1OE for dual-bank control
1A0–1A3 (2,4,6,8)	Inverting data input	Drives corresponding 1Yn outputs with polarity inversion; 5 V tolerant
2A0–2A3 (17,15,13,11)	Inverting data input	Drives corresponding 2Yn outputs with polarity inversion; 5 V tolerant
1Y0–1Y3 (18,16,14,12)	Inverting 3-state output	Outputs inverted 1An signals; high-Z when 1OE = HIGH
2Y0–2Y3 (3,5,7,9)	Inverting 3-state output	Outputs inverted 2An signals; high-Z when 2OE = HIGH
VCC, 20	Positive supply	1.2–3.6 V logic supply; powers internal circuitry and output drivers
GND, 10	Ground reference	0 V return path for all I/O and internal logic; decoupling required near pin

Key Features

Feature	Design Value
5 V-tolerant I/O	Inputs and outputs withstand up to +5.5 V regardless of VCC, enabling direct 5 V ↔ 3.3 V bus translation
Schmitt-trigger inputs	Hysteresis ≥ 0.3 V typical ensures reliable switching with slow edges (e.g., RC-filtered control lines)
IOFF partial power-down	Output disable remains functional at VCC = 0 V, preventing back-current in hot-plug or multi-rail systems
Dual independent 3-state controls	1OE and 2OE allow selective disabling of two 4-bit banks-critical for memory-mapped I/O or segmented bus arbitration
Wide temperature range	Specified from −40 °C to +125 °C, supporting deployment in industrial PLCs and automotive body-control modules

Applications

Industrial Bus Buffering

Memory Address Latching

Use Scenario: Isolating and driving 8-bit parallel address/data buses between microcontroller and peripheral ICs in programmable logic controllers.

IC Role / Device Role / Timing Role: Inverting 3-state buffer providing signal integrity, fanout gain, and bus contention prevention via OE-controlled release.

Use Value: Dual OE pins allow precise timing control of bus segments; 5 V tolerance permits legacy 5 V peripherals to coexist with modern 3.3 V MCUs.

Use Scenario: Latching and buffering address lines to static RAM or flash memory in embedded instrumentation systems.

IC Role / Device Role / Timing Role: Octal inverting driver translating MCU address bits to memory inputs while maintaining setup/hold margins.

Use Value: Propagation delay ≤5.5 ns ensures address stability before memory access windows; IOFF prevents data corruption during MCU reset.

Mixed-Voltage Level Translation

GPIO Expansion Interface

Use Scenario: Interfacing 3.3 V FPGA I/O banks with 5 V sensor modules or actuator drivers in factory automation equipment.

IC Role / Device Role / Timing Role: Bidirectional voltage translator using 3-state control to manage direction and isolation on shared lines.

Use Value: No external resistors or power supplies needed; Schmitt-trigger inputs reject noise from long sensor cables.

Use Scenario: Expanding GPIO count for microcontroller-based HVAC controllers, where discrete sensors and relays require isolated drive capability.

IC Role / Device Role / Timing Role: Inverting buffer providing current gain and electrical isolation between MCU pins and relay coils or optocouplers.

Use Value: 24 mA output drive per pin supports direct relay coil drive; −40 °C to +125 °C rating matches environmental chamber requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC240APWR	TSSOP20 (SOT360-1) package; identical electrical specs; same 1.2–3.6 V range and 5 V tolerance	No mechanical fit change; requires PCB footprint update; thermal resistance higher than SSOP	Select if board layout favors thinner profile or existing TSSOP20 land pattern
74LVC240APW,118	Same TSSOP20 package as SN74LVC240APWR but Nexperia-marked; identical parametric performance	Direct second-source alternative with identical qualification and traceability	Prefer for supply chain diversification while retaining full compatibility and documentation alignment

Compared with 74LVC240ADB,112, the TSSOP alternatives offer identical logic function and electrical behavior but differ in thermal performance (higher θJA) and mechanical mounting-SSOP provides better heat dissipation and proven reliability in high-vibration industrial environments.

Availability

74LVC240ADB,112 is available at Aetrix Electronics and suitable for industrial control systems, embedded instrumentation, and mixed-voltage interface design requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 74LVC240ADB,112 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, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74LVC series delivers advanced low-voltage CMOS logic optimized for energy-efficient, mixed-supply digital systems-designed specifically for robust interoperability across 1.2 V to 5 V domains in space-constrained industrial electronics.

FAQ

What is the maximum input voltage the 74LVC240ADB,112 can tolerate when VCC = 1.8 V?

The device tolerates input voltages from −0.5 V to +5.5 V regardless of VCC level. At VCC = 1.8 V, inputs may be safely driven by 5 V TTL or CMOS sources without damage or level-shifting circuitry. This is enabled by internal clamping structures and verified per JEDEC JESD78.

Does the 74LVC240ADB,112 support hot insertion into a live 5 V bus?

Yes-its IOFF circuitry actively disables outputs and limits leakage to ≤±20 μA when VCC = 0 V, preventing backfeed current even if 5 V is applied to I/O pins during insertion. This meets IEC 61000-4-2 system-level ESD robustness requirements for hot-swap interfaces.

Can both output-enable pins (1OE and 2OE) be tied together for single 8-bit control?

Yes-1OE (pin 19) and 2OE (pin 1) are electrically independent but functionally identical. They may be wired in parallel to a common control signal for unified 8-bit 3-state operation, provided the driving source can sink/supply sufficient current for both inputs (each draws ≤100 μA max).

Is the 74LVC240ADB,112 qualified for automotive applications?

No-the device is specified for −40 °C to +125 °C operation but is not AEC-Q100 qualified. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use in automotive systems requires formal qualification testing by the end customer and carries no manufacturer warranty for such use.

74LVC240ADB,112 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74LVC

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Buffer, Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 1.2V ~ 3.6V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SSOP

74LVC240ADB,112 FAQ

1.How can I place an order for 74LVC240ADB,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC240ADB,112 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,112 reliable?

The price and inventory of 74LVC240ADB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC240ADB,112 is usually 5 days.

3.What payment methods are accepted for 74LVC240ADB,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC240ADB,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVC240ADB,112?

74LVC240ADB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC240ADB,112 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,112?

For technical support, including 74LVC240ADB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC240ADB,112 requirements.

6.How does Aetrix verify that 74LVC240ADB,112 is sourced from the original manufacturer or authorized distributors?

All 74LVC240ADB,112 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,112 meets industry standards.

7.What is the process for return or replacement of 74LVC240ADB,112?

All 74LVC240ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC240ADB,112, 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,112 part is unused and in its original packaging.

Return procedure for 74LVC240ADB,112:

1.Submit a request within 90 days.

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

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