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

onsemi 74LVX240M

Name: 74LVX240M
Brand: onsemi
SKU: 74LVX240M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVX240M

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74LVX240M.pdf

Description:: IC BUFFER INVERT 3.6V 20SOIC

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Product details

Overview

74LVX240M from Fairchild Semiconductor is a low-voltage octal inverting buffer/line driver with dual 3-STATE outputs, designed for memory address and clock driving in mixed-voltage systems. It operates from 2.0V to 3.6V, tolerates 5.5V inputs, and delivers ±4 mA output drive at 3.3V with propagation delay as low as 4.3 ns (CL = 15 pF).

For engineers reviewing the 74LVX240M datasheet, pinout, applications, or equivalent options, key selection criteria include 3.3V-compatible 3-STATE bus interface capability, 5V-tolerant inputs for 3V/5V translation, simultaneous switching noise immunity, and SOIC-20 packaging for legacy PCB compatibility.

Technical Context

The 74LVX240M implements two independent 4-bit inverting buffer groups (I0–I3/O0–O3 and I4–I7/O4–O7), each controlled by separate 3-STATE enable inputs OE1 (pins 12,14,16,18) and OE2 (pins 3,5,7,9). Its input structure supports voltage translation: 5V logic inputs are safely accepted while operating from a 3.3V supply.

It meets stringent noise performance requirements per datasheet Note 3 (input tr/tf = 3 ns), with guaranteed dynamic thresholds (VIHD ≥ 2.0V, VILD ≤ 0.8V at VCC = 3.3V) and simultaneous output skew ≤1.5 ns (tOSLH/tOSHL), enabling reliable operation in high-density bus environments.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.0V to 3.6V - Enables direct integration into 3.3V systems with margin for supply variation.
Input Voltage Range	0V to 5.5V - Allows safe interfacing with 5V TTL/CMOS logic without level shifters.
Output Drive	±4 mA at VOL ≤ 0.44V / VOH ≥ 2.48V - Sufficient for driving standard 50-pF loads on 3.3V buses.
Propagation Delay	4.3 ns typ (CL = 15 pF, VCC = 3.3V) - Supports >100 MHz bus timing in short-line applications.
3-STATE Enable/Disable	tPZH = 5.5 ns, tPHZ = 9.7 ns typ - Fast output control critical for bidirectional bus arbitration.
Simultaneous Switching Noise	VOLP ≤ 0.8V, VOLV ≥ −0.8V (CL = 50 pF) - Quantified dynamic noise margin ensures signal integrity during parallel transitions.
Operating Temperature	−40°C to +85°C - Qualified for industrial ambient environments without derating.

Pinout & Package

74LVX240M is housed in a 20-lead Small Outline Integrated Circuit (SOIC) package, JEDEC MS-013 compliant, 0.300" wide (Package Number M20B), with standard gull-wing lead form and 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 6, 10, 11, 13, 15	Inverting Input (I0–I7)	Eight buffered inputs accepting 0–5.5V; each drives corresponding inverted output.
3, 5, 7, 9	OE2 (3-STATE Enable Group 2)	Active-Low enable for outputs O4–O7; controls group-level output impedance state.
12, 14, 16, 18	OE1 (3-STATE Enable Group 1)	Active-Low enable for outputs O0–O3; independent control enables split-bus isolation.
8	GND	Ground reference for all I/O and internal circuitry; must be low-impedance connection.
19	VCC	Positive supply (2.0–3.6V); powers internal logic and output stages.
17, 19, 20, 1, 2, 4, 6, 10	Inverting Output (O0–O7)	Eight 3-STATE outputs; driven LOW when input HIGH, HIGH when input LOW, Hi-Z when OE asserted.

Key Features

Feature	Design Value
5V-tolerant inputs	Supports direct connection to 5V logic while powered from 3.3V, eliminating external level translators in mixed-supply systems.
Dual independent 3-STATE enables	OE1 and OE2 allow selective disabling of two 4-bit output groups, enabling flexible bus segmentation and reduced contention risk.
Guaranteed dynamic noise performance	VOLP/VOLV limits ensure predictable output behavior under worst-case simultaneous switching, critical for signal integrity in dense layouts.
Low quiescent current	ICC ≤ 40 µA max at VCC = 3.6V - minimizes standby power in battery-backed or energy-sensitive applications.

Applications

Memory Address Buffering	3.3V/5V Bus Interface
Use Scenario: Driving address lines from a 3.3V microcontroller to a 5V SRAM or EPROM in a mixed-voltage embedded system. IC Role / Device Role / Timing Role: Inverting buffer with 5V-tolerant inputs and 3.3V-compatible outputs, providing level translation and fanout amplification. Use Value: Eliminates need for discrete level-shifting components while maintaining timing margins via sub-5 ns propagation delay.	Use Scenario: Isolating and buffering data bus segments between a 3.3V FPGA and legacy 5V peripheral ICs. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent 3-STATE control per 4-bit group, enabling time-multiplexed bus sharing. Use Value: Dual OE pins allow precise arbitration timing; 5.5V input tolerance prevents latch-up during hot-swap or power sequencing events.
Clock Distribution	Industrial Control Backplane
Use Scenario: Distributing a 3.3V system clock to multiple 5V timing-critical peripherals (e.g., ADCs, DACs) with matched edge rates. IC Role / Device Role / Timing Role: Low-skew inverting clock driver with <1.5 ns output-to-output skew, preserving phase alignment across loads. Use Value: Tight skew specification ensures setup/hold timing compliance across distributed clock domains without added delay compensation.	Use Scenario: Interfacing a 3.3V PLC CPU module to 5V I/O expansion cards over a shared backplane bus. IC Role / Device Role / Timing Role: Robust octal line driver with industrial temperature rating (−40°C to +85°C) and high noise immunity. Use Value: Guaranteed simultaneous switching noise limits and 180 mW power dissipation enable stable operation in electrically noisy factory environments.

Memory Address Buffering

3.3V/5V Bus Interface

Use Scenario: Driving address lines from a 3.3V microcontroller to a 5V SRAM or EPROM in a mixed-voltage embedded system.

IC Role / Device Role / Timing Role: Inverting buffer with 5V-tolerant inputs and 3.3V-compatible outputs, providing level translation and fanout amplification.

Use Value: Eliminates need for discrete level-shifting components while maintaining timing margins via sub-5 ns propagation delay.

Use Scenario: Isolating and buffering data bus segments between a 3.3V FPGA and legacy 5V peripheral ICs.

IC Role / Device Role / Timing Role: Bidirectional bus driver with independent 3-STATE control per 4-bit group, enabling time-multiplexed bus sharing.

Use Value: Dual OE pins allow precise arbitration timing; 5.5V input tolerance prevents latch-up during hot-swap or power sequencing events.

Clock Distribution

Industrial Control Backplane

Use Scenario: Distributing a 3.3V system clock to multiple 5V timing-critical peripherals (e.g., ADCs, DACs) with matched edge rates.

IC Role / Device Role / Timing Role: Low-skew inverting clock driver with <1.5 ns output-to-output skew, preserving phase alignment across loads.

Use Value: Tight skew specification ensures setup/hold timing compliance across distributed clock domains without added delay compensation.

Use Scenario: Interfacing a 3.3V PLC CPU module to 5V I/O expansion cards over a shared backplane bus.

IC Role / Device Role / Timing Role: Robust octal line driver with industrial temperature rating (−40°C to +85°C) and high noise immunity.

Use Value: Guaranteed simultaneous switching noise limits and 180 mW power dissipation enable stable operation in electrically noisy factory environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC240PW	Non-inverting inputs; 1.65–3.6V VCC range; lower ICC (10 µA typ); TSSOP-20 package only.	Requires logic inversion externally if inverting function is mandatory; lacks 5V input tolerance (max VI = VCC + 0.3V).	Select when non-inverting behavior is acceptable and strict 3.3V-only operation is guaranteed.
SN74LV240APWR	Inverting; 2.0–5.5V VCC range; higher drive (±16 mA); wider SOIC-20 footprint (0.300" vs 0.225").	Supports direct 5V operation but consumes more power; pinout differs (OE placement, output grouping).	Select when higher output current or 5V supply operation is required, and board layout allows SOIC-20 variant.

Compared with 74LVC240PW and SN74LV240APWR, the 74LVX240M uniquely combines 5V-tolerant inputs with true 3.3V-only supply operation and dual independent OE control in a JEDEC-standard SOIC-20, making it optimal for legacy 3V/5V interface upgrades where pinout and voltage translation are non-negotiable.

Availability

74LVX240M is available at Aetrix Electronics and suitable for memory address buffering, 3.3V/5V bus interfacing, and clock distribution applications requiring stable component supply, long-term industrial availability, and SOIC-20 footprint compatibility.

Supply support for 74LVX240M 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The LVX logic family, including the 74LVX240M, was engineered specifically for low-voltage (3.3V) systems requiring interoperability with 5V logic, emphasizing voltage translation, noise immunity, and SOIC packaging for backward compatibility.

FAQ

What is the maximum input voltage the 74LVX240M can tolerate?

The 74LVX240M accepts input voltages up to 5.5V regardless of VCC level, enabling safe interfacing with 5V logic families while operating from a 3.3V supply. This 5V-tolerance is explicitly specified in the Absolute Maximum Ratings and DC Electrical Characteristics tables, with VI rated from −0.5V to 7V absolute max and functional operation guaranteed to 5.5V.

Does the 74LVX240M support true 3-STATE operation on all eight outputs?

Yes, the 74LVX240M provides full 3-STATE control across all eight outputs via two independent active-low enable inputs: OE1 (pins 12,14,16,18) controls outputs O0–O3, and OE2 (pins 3,5,7,9) controls outputs O4–O7. When either OE is LOW, its associated four outputs drive actively; when HIGH, they enter high-impedance state with IOZ ≤ ±2.5 µA at VCC = 3.6V.

What is the typical propagation delay of the 74LVX240M at 3.3V operation?

At VCC = 3.3V ±0.3V and CL = 15 pF, the 74LVX240M exhibits a typical propagation delay of 4.3 ns for tPLH and 6.2 ns for tPHL. These values are measured under standard AC test conditions and represent the delay from input transition to valid output transition, confirming suitability for sub-100 MHz digital timing paths.

Is the 74LVX240M pin-compatible with other 74-series octal buffers?

No, the 74LVX240M is not pin-compatible with standard 74LS240 or 74HC240 due to differences in enable pin assignment and output grouping. Its OE1/OE2 placement (pins 12,14,16,18 and 3,5,7,9) and inverting output mapping follow the LVX-specific layout defined in the Connection Diagram, requiring dedicated PCB footprint design.

What thermal and environmental specifications apply to the 74LVX240M?

The 74LVX240M is rated for operation from −40°C to +85°C ambient temperature and storage from −65°C to +150°C. Its SOIC-20 package (M20B) has a power dissipation limit of 180 mW, and thermal resistance θJA is approximately 120°C/W per JEDEC MS-013 standards, supporting use in unforced-air industrial environments without additional heatsinking.

74LVX240M Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVX

Package/Case:: 20-SOIC (0.295", 7.50mm 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:: 4mA, 4mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

74LVX240M FAQ

1.How can I place an order for 74LVX240M through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVX240M 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 74LVX240M reliable?

The price and inventory of 74LVX240M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX240M is usually 5 days.

3.What payment methods are accepted for 74LVX240M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX240M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVX240M?

74LVX240M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVX240M 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 74LVX240M?

For technical support, including 74LVX240M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX240M requirements.

6.How does Aetrix verify that 74LVX240M is sourced from the original manufacturer or authorized distributors?

All 74LVX240M 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 74LVX240M meets industry standards.

7.What is the process for return or replacement of 74LVX240M?

All 74LVX240M units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX240M, 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 74LVX240M part is unused and in its original packaging.

Return procedure for 74LVX240M:

1.Submit a request within 90 days.

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

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