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

Texas Instruments SN74LVT240ANSR

Name: SN74LVT240ANSR
Brand: Texas Instruments
SKU: SN74LVT240ANSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT240ANSR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVT240ANSR.pdf

Description:: IC BUFFER INVERT 3.6V 20SO

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Product details

Overview

SN74LVT240ANSR from Texas Instruments is an octal buffer/line driver IC with dual 4-bit noninverting channels, designed for 3.3-V V_CC operation while supporting 5-V TTL-level inputs and outputs. It features I_off and power-up 3-state for hot insertion, operates down to 2.7 V, and delivers t_PLH/t_PHL ≤ 3.8 ns at V_CC = 3.3 V - used in mixed-voltage bus interface and backplane driver applications.

For engineers reviewing the SN74LVT240ANSR datasheet, SN74LVT240ANSR pinout, SN74LVT240ANSR application, or SN74LVT240ANSR equivalent, key selection criteria include its 20-pin SOP-NS package, ±100 µA I_off specification, 64 mA I_OL, support for unregulated battery operation, and compliance with JESD 78 Class II latch-up performance.

Technical Context

This device implements two independent 4-bit noninverting buffer sections, each with dedicated output-enable (OE) control. Its I_off circuitry actively disables outputs during power-down to prevent current backflow, and power-up 3-state ensures high-impedance outputs when V_CC is below 1.5 V.

The SN74LVT240ANSR supports mixed-mode signal operation: 5-V-tolerant inputs and outputs coexist with a 3.3-V supply rail, enabling seamless interfacing between legacy 5-V logic and modern low-voltage systems without level-shifting components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - enables stable operation from unregulated batteries or noisy DC supplies without external regulation.
I_OL / I_OH	64 mA / −32 mA - drives heavy capacitive loads (e.g., long PCB traces or multiple TTL inputs) without signal degradation.
t_PLH/t_PHL	≤ 3.8 ns at V_CC = 3.3 V - supports high-speed data transfer in 33-MHz bus environments with tight timing margins.
I_off	±100 µA at V_CC = 0 - prevents damaging back-current during hot-swap events in modular backplane systems.
V_IL/V_IH	0.8 V / 2.0 V - compatible with standard TTL input thresholds, ensuring reliable logic recognition across voltage domains.
Latch-up	>100 mA per JESD 78 Class II - guarantees robustness against transient-induced latch-up in industrial environments.
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM - meets stringent electrostatic discharge requirements for automated assembly and field service.

Pinout & Package

SOP-NS package: 20-pin small-outline plastic package, 0.65 mm pitch, 7.5 mm × 13.0 mm body size, 2.0 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Output-enable inputs (active-low)	Independent control of each 4-bit buffer section; asserted low enables Y outputs, high places them in high-Z state.
1A1–1A4, 2A1–2A4	Data inputs	Noninverting inputs for respective buffer sections; accept 0–5.5 V signals regardless of V_CC level.
1Y1–1Y4, 2Y1–2Y4	Buffered outputs	Drive 3.3-V logic levels with 5-V tolerance; sink up to 64 mA or source up to 32 mA per output.
GND (Pin 10), V_CC (Pin 11)	Power terminals	Single-supply operation at 2.7–3.6 V; GND reference for all I/O; no separate ground plane required for mixed-voltage signaling.

Key Features

Feature	Design Value
Mixed-mode I/O	5-V-tolerant inputs/outputs on 3.3-V V_CC - eliminates need for external level translators in 3.3/5-V system interconnects.
Hot-insertion support	I_off + power-up 3-state - enables safe live insertion into powered backplanes without disrupting adjacent modules.
Low ground bounce	V_OLP < 0.8 V at V_CC = 3.3 V - minimizes noise coupling into shared ground paths during simultaneous output switching.
Wide supply range	Operates down to 2.7 V - supports direct connection to single-cell Li-ion or alkaline battery rails without regulation.
Robust ESD protection	Exceeds JESD 22 standards (2000-V HBM, 200-V MM, 1000-V CDM) - reduces field failure risk in handling and deployment.

Applications

Industrial Backplane Interface	Memory Module Address Buffering
Use Scenario: Interfacing 5-V address/data buses from legacy controllers to 3.3-V memory modules in programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting octal buffer providing voltage-domain translation and fanout amplification for address lines. Use Value: Eliminates discrete level shifters while maintaining <3.8 ns propagation delay - preserves setup/hold timing margins in 33-MHz memory cycles.	Use Scenario: Driving high-capacitance DDR SDRAM address/command buses from low-power microcontrollers in embedded instrumentation. IC Role / Device Role / Timing Role: Dual 4-bit line driver isolating controller outputs and strengthening signal integrity across 10+ cm PCB traces. Use Value: 64 mA sink capability ensures full logic swing under 30 pF load - prevents timing skew and bit errors in multi-drop configurations.
Hot-Swappable I/O Carrier Board	Automotive Body Control Module Bus Extender
Use Scenario: Enabling live replacement of sensor acquisition cards in modular test equipment without powering down the main chassis. IC Role / Device Role / Timing Role: Hot-insertion–qualified buffer managing bidirectional control signals between carrier and module connectors. Use Value: I_off limits backfeed current to ±100 µA during insertion - prevents brownouts or latch-up in upstream power management ICs.	Use Scenario: Extending LIN or CAN subsystem communication lines across distributed automotive ECUs with varying supply voltages. IC Role / Device Role / Timing Role: Voltage-tolerant buffer isolating 5-V sensor interfaces from 3.3-V microcontroller peripherals. Use Value: 2.7–3.6 V operation accommodates automotive battery droop (e.g., cold-crank to 6.5 V) - maintains logic functionality without reset.

Industrial Backplane Interface

Memory Module Address Buffering

Use Scenario: Interfacing 5-V address/data buses from legacy controllers to 3.3-V memory modules in programmable logic controllers.

IC Role / Device Role / Timing Role: Noninverting octal buffer providing voltage-domain translation and fanout amplification for address lines.

Use Value: Eliminates discrete level shifters while maintaining <3.8 ns propagation delay - preserves setup/hold timing margins in 33-MHz memory cycles.

Use Scenario: Driving high-capacitance DDR SDRAM address/command buses from low-power microcontrollers in embedded instrumentation.

IC Role / Device Role / Timing Role: Dual 4-bit line driver isolating controller outputs and strengthening signal integrity across 10+ cm PCB traces.

Use Value: 64 mA sink capability ensures full logic swing under 30 pF load - prevents timing skew and bit errors in multi-drop configurations.

Hot-Swappable I/O Carrier Board

Automotive Body Control Module Bus Extender

Use Scenario: Enabling live replacement of sensor acquisition cards in modular test equipment without powering down the main chassis.

IC Role / Device Role / Timing Role: Hot-insertion–qualified buffer managing bidirectional control signals between carrier and module connectors.

Use Value: I_off limits backfeed current to ±100 µA during insertion - prevents brownouts or latch-up in upstream power management ICs.

Use Scenario: Extending LIN or CAN subsystem communication lines across distributed automotive ECUs with varying supply voltages.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer isolating 5-V sensor interfaces from 3.3-V microcontroller peripherals.

Use Value: 2.7–3.6 V operation accommodates automotive battery droop (e.g., cold-crank to 6.5 V) - maintains logic functionality without reset.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC240APWR	Lower drive strength (24 mA I_OL), 1.65–3.6 V V_CC, no 5-V-tolerant inputs	Not suitable for 5-V system interfacing; requires external level shifters in mixed-voltage designs	Select only if operating exclusively in 3.3-V-only systems with light capacitive loads.
74ALVC240MTCX	Higher speed (t_PD ≈ 2.5 ns), 1.65–3.6 V V_CC, 5-V-tolerant inputs but not outputs	Cannot drive 5-V TTL loads directly; limited to 3.3-V receiver-side interfacing	Prefer when ultra-low propagation delay is critical and downstream receivers are 3.3-V only.

Compared with SN74LVT240ANSR, SN74LVC240APWR offers lower power but sacrifices 5-V I/O compatibility and drive strength, while 74ALVC240MTCX improves speed but removes 5-V output capability - making SN74LVT240ANSR uniquely suited for bidirectional 3.3/5-V bus bridging where both voltage domains must be driven.

Availability

SN74LVT240ANSR is available at Aetrix Electronics and suitable for industrial backplane interface, memory module buffering, hot-swappable carrier boards, and automotive bus extension requiring stable component supply across extended temperature ranges.

Supply support for SN74LVT240ANSR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVT240ANSR belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for high-speed, mixed-voltage interoperability in demanding real-time control and data acquisition systems.

FAQ

What is the maximum operating temperature range for SN74LVT240ANSR?

The SN74LVT240ANSR is rated for operation from −40°C to +85°C ambient temperature, meeting industrial-grade thermal requirements. This range is validated across all electrical parameters in the datasheet, including propagation delay, output drive, and I_off performance - ensuring reliability in factory automation and outdoor embedded systems where thermal cycling occurs.

Does SN74LVT240ANSR support true 5-V output drive?

Yes, SN74LVT240ANSR provides 5-V-tolerant outputs capable of driving standard TTL loads: VOH ≥ 2.4 V at I_OH = −8 mA and VOL ≤ 0.5 V at I_OL = 64 mA when V_CC = 2.7–3.6 V. This allows direct connection to 5-V receivers without external pull-ups or level translators - a core feature distinguishing it from LVC-family buffers.

How does the power-up 3-state function work in SN74LVT240ANSR?

In SN74LVT240ANSR, power-up 3-state automatically places all outputs in high-impedance mode when V_CC is between 0 V and 1.5 V during power ramp-up or ramp-down. This prevents bus contention before system logic stabilizes. For guaranteed high-Z above 1.5 V, OE must be pulled to V_CC via a resistor - a design requirement explicitly defined in the datasheet's application guidance.

Can SN74LVT240ANSR be used in hot-swap applications without additional circuitry?

Yes, SN74LVT240ANSR is fully specified for hot insertion using integrated I_off and power-up 3-state circuits. When powered down, I_off limits current flow to ±100 µA even with live 5-V signals applied - eliminating the need for external series resistors or FET switches in modular backplane designs compliant with IEEE 1101.10.

What package type is SN74LVT240ANSR supplied in, and what are its key mechanical dimensions?

SN74LVT240ANSR uses the SOP-NS (Narrow Small Outline Package) with 20 pins, 0.65 mm lead pitch, 7.5 mm × 13.0 mm body size, and 2.0 mm maximum height. Its JEDEC MO-153–compliant footprint enables drop-in compatibility with other NS-package logic devices and supports standard reflow profiles per IPC-J-STD-020.

SN74LVT240ANSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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-SO

SN74LVT240ANSR FAQ

1.How can I place an order for SN74LVT240ANSR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT240ANSR 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 SN74LVT240ANSR reliable?

The price and inventory of SN74LVT240ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT240ANSR is usually 5 days.

3.What payment methods are accepted for SN74LVT240ANSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT240ANSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVT240ANSR?

SN74LVT240ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT240ANSR 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 SN74LVT240ANSR?

For technical support, including SN74LVT240ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT240ANSR requirements.

6.How does Aetrix verify that SN74LVT240ANSR is sourced from the original manufacturer or authorized distributors?

All SN74LVT240ANSR 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 SN74LVT240ANSR meets industry standards.

7.What is the process for return or replacement of SN74LVT240ANSR?

All SN74LVT240ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT240ANSR, 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 SN74LVT240ANSR part is unused and in its original packaging.

Return procedure for SN74LVT240ANSR:

1.Submit a request within 90 days.

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

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