Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 74LVT240MSA

Name: 74LVT240MSA
Brand: onsemi
SKU: 74LVT240MSA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 74LVT240MSA

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74LVT240MSA.pdf

Description:: IC BUFFER INVERT 3.6V 20SSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,261

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

74LVT240MSA from Fairchild Semiconductor is an inverting octal buffer/line driver with 3-STATE outputs, designed for low-voltage (2.7–3.6V) V_CC operation while interfacing to 5V TTL systems. It provides –32mA/+64mA output drive, operates from –40°C to +85°C, and features power-up/down high-impedance for glitch-free bus loading in memory address and clock distribution applications.

For engineers reviewing the 74LVT240MSA datasheet, pinout, applications, or equivalent options, this device serves as a functionally compatible replacement for 74-series 240 logic in space-constrained SSOP layouts requiring robust 3.3V bus driving with 5V input tolerance and latch-up immunity exceeding 500mA.

Technical Context

The 74LVT240MSA implements eight independent inverting buffers, each with dual 3-STATE enable inputs (OE1, OE2) controlling two groups of four outputs. Its BiCMOS fabrication enables ABT-class speed (t_PLH/t_PHL ≤ 4.6 ns at 3.3V) with low static current (I_CCZ = 0.19 mA) and high noise immunity (V_IL = 0.8V, V_VIH = 2.0V).

Unlike the bushold-equipped 74LVTH240, the 74LVT240MSA omits bushold circuitry on inputs - requiring external pull-up/pull-down resistors for unused pins. It supports live insertion/extraction and maintains 3-STATE leakage < ±5 µA across full temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7V to 3.6V - Ensures stable operation in 3.3V systems with ±10% supply tolerance.
I_OH/I_OL	–32mA / +64mA - Drives heavy capacitive loads or multiple TTL inputs without signal degradation.
t_PLH/t_PHL	≤ 4.6 ns (CL = 50pF) - Enables high-speed data routing in memory and clock buses up to ~200 MHz.
Propagation Skew	≤ 1.0 ns - Guarantees tight timing alignment across all eight outputs for synchronous bus applications.
Input Voltage Range	0V to 5.5V - Allows direct interface to 5V logic without level shifters.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded and computing environments.
ESD Rating (HBM)	> 2000V - Provides robust handling during board assembly and system integration.

Pinout & Package

74LVT240MSA is housed in a 20-lead Shrink Small Outline Package (SSOP), JEDEC MO-150 compliant, 5.3mm wide, with 0.65mm lead pitch and gull-wing terminations. This package delivers 35% smaller footprint than standard SOIC while maintaining compatibility with automated SMT placement and reflow.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2	Active-low 3-STATE enable inputs controlling outputs O0–O3 (OE1) and O4–O7 (OE2); both must be LOW to enable respective group.
2–9	I0–I7	Inverting data inputs - each drives corresponding output with polarity inversion (e.g., I0 → NOT O0).
11–18	O0–O7	3-STATE inverting outputs - present inverted input logic when enabled; enter high-impedance state when OE1/OE2 HIGH.
10	GND	Ground reference for all internal circuitry and output drivers.
20	V_CC	3.3V supply rail - powers BiCMOS core and output stages; decoupling capacitor required near pin.

Key Features

Feature	Design Value
Inverting octal buffering with dual 3-STATE control	Enables selective isolation of two 4-bit data lanes on shared buses without external logic.
5V-tolerant inputs on 3.3V supply	Eliminates need for external level translators when interfacing legacy 5V peripherals or controllers.
Power-up/down high-impedance	Prevents bus contention and signal glitches during power sequencing in hot-swap or modular systems.
High sink/source drive capability	Supports fan-out of ≥10 LVTTL loads or direct connection to unterminated transmission lines.
Latch-up immunity > 500mA	Ensures robustness against transient overcurrent events in noisy industrial environments.

Applications

Memory Address Buffering	Clock Distribution
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a dense PCB. IC Role / Device Role / Timing Role: Inverting buffer isolating MCU address bus from memory load; dual OE pins allow bank-select gating. Use Value: Prevents address skew across memory chips using matched propagation delay (≤1.0 ns skew) and eliminates bus contention via controlled 3-STATE activation.	Use Scenario: Distributing a system clock to multiple FPGA configuration ICs or peripheral controllers. IC Role / Device Role / Timing Role: Low-skew inverting clock driver with 3-STATE disable for dynamic clock gating. Use Value: Maintains signal integrity with 64mA drive into capacitive loads and ensures glitch-free clock stop/start via power-up high-Z behavior.
Bus Transceiver Interface	Industrial I/O Expansion
Use Scenario: Bidirectional data bus isolation between a 3.3V processor and 5V legacy peripherals via direction-controlled OE signals. IC Role / Device Role / Timing Role: Unidirectional line driver translating 3.3V logic levels to 5V-compatible outputs while accepting 5V inputs safely. Use Value: Achieves voltage-level interoperability without external resistors or translators, leveraging 5.5V input rating and 3.3V V_CC-based output swing.	Use Scenario: Expanding GPIO count on PLC modules where space is constrained and industrial temperature range is required. IC Role / Device Role / Timing Role: Compact octal buffer providing ESD-hardened (2000V HBM), latch-up-immune signal conditioning for sensor/actuator interfaces. Use Value: Delivers reliable operation in harsh environments using SSOP package's thermal performance and –40°C to +85°C qualification.

Memory Address Buffering

Clock Distribution

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a dense PCB.

IC Role / Device Role / Timing Role: Inverting buffer isolating MCU address bus from memory load; dual OE pins allow bank-select gating.

Use Value: Prevents address skew across memory chips using matched propagation delay (≤1.0 ns skew) and eliminates bus contention via controlled 3-STATE activation.

Use Scenario: Distributing a system clock to multiple FPGA configuration ICs or peripheral controllers.

IC Role / Device Role / Timing Role: Low-skew inverting clock driver with 3-STATE disable for dynamic clock gating.

Use Value: Maintains signal integrity with 64mA drive into capacitive loads and ensures glitch-free clock stop/start via power-up high-Z behavior.

Bus Transceiver Interface

Industrial I/O Expansion

Use Scenario: Bidirectional data bus isolation between a 3.3V processor and 5V legacy peripherals via direction-controlled OE signals.

IC Role / Device Role / Timing Role: Unidirectional line driver translating 3.3V logic levels to 5V-compatible outputs while accepting 5V inputs safely.

Use Value: Achieves voltage-level interoperability without external resistors or translators, leveraging 5.5V input rating and 3.3V V_CC-based output swing.

Use Scenario: Expanding GPIO count on PLC modules where space is constrained and industrial temperature range is required.

IC Role / Device Role / Timing Role: Compact octal buffer providing ESD-hardened (2000V HBM), latch-up-immune signal conditioning for sensor/actuator interfaces.

Use Value: Delivers reliable operation in harsh environments using SSOP package's thermal performance and –40°C to +85°C qualification.

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	Non-inverting outputs; 3.3V-only I/O (no 5V tolerance); lower drive (±24mA); same SSOP-20 package.	Requires redesign of logic polarity and external level shifting for 5V interfaces.	Select when non-inverting logic suffices and 5V input tolerance is unnecessary.
74LVX240M	Lower V_CC range (2.0–3.6V); reduced drive (±24mA); no live insertion support; same SSOP-20 footprint.	Not suitable for hot-plug backplanes or systems requiring guaranteed glitch-free power sequencing.	Choose for ultra-low-power designs where 32mA/64mA drive and live insertion are not required.

Compared with SN74LVC240APWR and 74LVX240M, the 74LVT240MSA uniquely combines 5V-tolerant inputs, high-current drive, and power-up high-Z in a compact SSOP - making it optimal for industrial bus buffering where voltage interoperability and robustness are critical.

Availability

74LVT240MSA is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, bus transceiver interfaces, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT240MSA 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 designer and manufacturer of analog and mixed-signal semiconductors, acquired by ON Semiconductor in 2016. Its logic portfolio emphasized high-speed, low-voltage, and robust interface solutions.

The 74LVT240MSA belongs to the LVT (Low-Voltage BiCMOS Technology) family, engineered for 3.3V systems needing TTL compatibility, high drive strength, and industrial reliability - particularly in computing, communications, and industrial control infrastructure.

FAQ

What is the logic function of the 74LVT240MSA?

The 74LVT240MSA is an inverting octal buffer with 3-STATE outputs: each of its eight inputs (I0–I7) drives a corresponding inverted output (O0–O7), and outputs enter high-impedance when either OE1 or OE2 is HIGH. It does not include bushold circuitry, unlike the 74LVTH240 variant.

Does the 74LVT240MSA support 5V input signals?

Yes, the 74LVT240MSA accepts DC input voltages up to 5.5V while operating from a 2.7–3.6V V_CC, enabling direct interfacing with 5V TTL logic without external level shifters - a key feature confirmed in its Recommended Operating Conditions table.

What package type is used for the 74LVT240MSA?

The 74LVT240MSA uses a 20-lead Shrink Small Outline Package (SSOP), JEDEC MO-150 compliant, 5.3mm wide, with 0.65mm lead pitch. This package is distinct from SOIC (M20B) and TSSOP (MTC20) variants and is optimized for higher PCB density.

How does the 74LVT240MSA handle power-up and power-down transitions?

The 74LVT240MSA features power-up/down high-impedance: outputs remain in high-Z state during V_CC ramp-up or ramp-down, preventing bus contention and signal glitches - a verified behavior documented under "Features" and confirmed in DC Electrical Characteristics (I_PU/PD ≤ ±100 µA).

Is the 74LVT240MSA pin-compatible with other 74LVT240 variants?

Yes, the 74LVT240MSA shares identical pinout and logic functionality with all 74LVT240 variants (e.g., 74LVT240WM, 74LVT240SJ), differing only in package type (MSA20 SSOP). All variants use the same 20-pin arrangement, including dual OE inputs, eight inputs, and eight 3-STATE outputs.

74LVT240MSA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVT

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:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SSOP

74LVT240MSA FAQ

1.How can I place an order for 74LVT240MSA through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT240MSA 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 74LVT240MSA reliable?

The price and inventory of 74LVT240MSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT240MSA is usually 5 days.

3.What payment methods are accepted for 74LVT240MSA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT240MSA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT240MSA?

74LVT240MSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT240MSA 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 74LVT240MSA?

For technical support, including 74LVT240MSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT240MSA requirements.

6.How does Aetrix verify that 74LVT240MSA is sourced from the original manufacturer or authorized distributors?

All 74LVT240MSA 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 74LVT240MSA meets industry standards.

7.What is the process for return or replacement of 74LVT240MSA?

All 74LVT240MSA units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT240MSA, 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 74LVT240MSA part is unused and in its original packaging.

Return procedure for 74LVT240MSA:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…