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

Texas Instruments SN74LVT240ADGVRG4

Name: SN74LVT240ADGVRG4
Brand: Texas Instruments
SKU: SN74LVT240ADGVRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT240ADGVRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-TFSOP (0.173", 4.40mm Width)

Datasheet:: SN74LVT240ADGVRG4.pdf

Description:: IC BUFFER INVERT 3.6V 20TVSOP

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Product details

Overview

SN74LVT240ADGVRG4 from Texas Instruments is an octal buffer/line driver IC designed for 3.3-V V_CC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features dual 4-bit noninverting buffers with independent output-enable (OE) controls, 2.7-V to 3.6-V supply range, and hot-insertion support via I_off and power-up 3-state functionality. It is used in bus interface translation and backplane driver applications.

For engineers reviewing the SN74LVT240ADGVRG4 datasheet, SN74LVT240ADGVRG4 pinout, SN74LVT240ADGVRG4 application, or SN74LVT240ADGVRG4 equivalent, key selection criteria include 3.3-V core compatibility with 5-V I/O tolerance, guaranteed high-impedance during power sequencing, low ground bounce (<0.8 V), and SSOP-20 package thermal performance (θ_JA = 70°C/W).

Technical Context

The SN74LVT240ADGVRG4 implements two independent 4-bit noninverting buffer sections, each controlled by a dedicated OE input. Its I_off circuitry actively disables outputs when V_CC = 0 V, preventing backflow current during hot insertion. Power-up 3-state ensures outputs remain high-impedance while V_CC ramps from 0 V to 1.5 V.

It supports TTL-level input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) and delivers rail-to-rail output swing (V_OL = 0.55 V at I_OL = 64 mA, V_OH = 2.0 V at I_OH = −32 mA) under 3.3-V operation. Propagation delay is 1.1–4.6 ns (t_PLH/t_PHL) with 50-pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Enables stable operation across unregulated battery supplies down to 2.7 V.
I_OL / I_OH	64 mA / −32 mA - Supports driving heavy capacitive loads or multiple TTL inputs without external buffering.
t_PLH/t_PHL	1.1–4.6 ns - Ensures sub-5-ns propagation for high-speed bus timing in 33-MHz+ systems.
V_IK	−1.2 V - Specifies safe negative input clamp voltage, critical for ESD robustness and noise margin.
θ_JA	70°C/W - Confirmed for DB (SSOP-20) package; enables thermal design for continuous 64-mA per-output operation at 85°C ambient.
V_OHP / V_OLP	<0.8 V typical - Quantifies output ground bounce, directly limiting simultaneous switching noise in dense PCB layouts.
I_off	±100 µA - Guarantees negligible leakage during hot-swap events, protecting upstream drivers and system integrity.

Pinout & Package

SN74LVT240ADGVRG4 is packaged in a 20-pin TVSOP (DGV) - thin very small outline package - with 0.5-mm lead pitch, 4.4-mm body width, and 1.2-mm max height. This RoHS-compliant, green (halogen-free) package supports fine-pitch automated assembly and offers θ_JA = 92°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Output-enable control inputs	Active-low enables respective 4-bit buffer sections; tied high via pullup for guaranteed high-Z during power ramp.
1A1–1A4, 2A1–2A4	Data inputs	Noninverting inputs accepting 0–5.5-V signals; compatible with both 3.3-V and 5-V logic families.
1Y1–1Y4, 2Y1–2Y4	Buffered outputs	Drive-strength-matched outputs delivering 3.3-V logic levels with 64-mA sink capability.
GND (Pin 10)	Ground reference	Primary return path for all output currents and internal logic; requires low-inductance PCB connection.
V_CC (Pin 11)	Supply voltage	3.3-V nominal supply; must be decoupled locally with ≥0.1-µF ceramic capacitor near Pin 11.

Key Features

Feature	Design Value
Mixed-mode 5-V I/O tolerance	Accepts 5-V inputs and drives 5-V loads while operating from 3.3-V V_CC, eliminating level-shifters in 3.3/5-V interconnects.
I_off protection	Blocks reverse current flow when powered down, enabling safe live insertion into active backplanes or motherboards.
Power-up 3-state	Forces outputs into high-impedance state during V_CC ramp (0–1.5 V), preventing bus contention at power-on/off.
Latch-up immunity	Exceeds 100 mA per JESD 78 Class II - ensures robustness against transient-induced latch-up in industrial environments.
ESD protection	2000-V HBM, 200-V MM, 1000-V CDM - meets stringent board-level ESD requirements without external protection diodes.

Applications

PCI Bus Interface	Industrial Backplane Driver
Use Scenario: Interfacing a 3.3-V FPGA or microcontroller to a legacy 5-V PCI slot for add-in card expansion. IC Role / Device Role / Timing Role: Level-translating octal buffer providing bidirectional data path isolation and timing-controlled enable sequencing. Use Value: Eliminates discrete level shifters while maintaining <4.6-ns propagation delay and guaranteed high-Z during hot-plug cycles.	Use Scenario: Driving parallel control signals across a 200-mm backplane in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer isolating CPU-side logic from noisy field-side wiring and relay actuation transients. Use Value: Delivers 64-mA sink per output to overcome backplane capacitance and maintains signal integrity via <0.8-V ground bounce.
Memory Address Latching	Test Equipment Signal Conditioning
Use Scenario: Buffering address lines between a 3.3-V ARM processor and 5-V SRAM or Flash memory in embedded instrumentation. IC Role / Device Role / Timing Role: Noninverting address driver with independent OE control enabling precise address strobe timing and bus release. Use Value: Supports 33-MHz+ address setup/hold timing with 1.1-ns min t_PLH and eliminates contention via power-up 3-state.	Use Scenario: Conditioning digital stimulus signals in automated test equipment (ATE) where DUT interfaces mix 3.3-V and 5-V logic families. IC Role / Device Role / Timing Role: Reconfigurable signal fanout device with per-section OE allowing dynamic routing of test vectors. Use Value: Provides ESD-hardened (2000-V HBM), low-jitter buffering with no external biasing required for mixed-voltage test head design.

PCI Bus Interface

Industrial Backplane Driver

Use Scenario: Interfacing a 3.3-V FPGA or microcontroller to a legacy 5-V PCI slot for add-in card expansion.

IC Role / Device Role / Timing Role: Level-translating octal buffer providing bidirectional data path isolation and timing-controlled enable sequencing.

Use Value: Eliminates discrete level shifters while maintaining <4.6-ns propagation delay and guaranteed high-Z during hot-plug cycles.

Use Scenario: Driving parallel control signals across a 200-mm backplane in programmable logic controller (PLC) I/O modules.

IC Role / Device Role / Timing Role: Low-skew, high-drive buffer isolating CPU-side logic from noisy field-side wiring and relay actuation transients.

Use Value: Delivers 64-mA sink per output to overcome backplane capacitance and maintains signal integrity via <0.8-V ground bounce.

Memory Address Latching

Test Equipment Signal Conditioning

Use Scenario: Buffering address lines between a 3.3-V ARM processor and 5-V SRAM or Flash memory in embedded instrumentation.

IC Role / Device Role / Timing Role: Noninverting address driver with independent OE control enabling precise address strobe timing and bus release.

Use Value: Supports 33-MHz+ address setup/hold timing with 1.1-ns min t_PLH and eliminates contention via power-up 3-state.

Use Scenario: Conditioning digital stimulus signals in automated test equipment (ATE) where DUT interfaces mix 3.3-V and 5-V logic families.

IC Role / Device Role / Timing Role: Reconfigurable signal fanout device with per-section OE allowing dynamic routing of test vectors.

Use Value: Provides ESD-hardened (2000-V HBM), low-jitter buffering with no external biasing required for mixed-voltage test head design.

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 sink), 1.65–3.6-V V_CC, no 5-V I/O tolerance.	Suitable only for pure 3.3-V or lower-voltage systems; cannot interface to 5-V buses.	Select when cost or power is prioritized over mixed-voltage interoperability.
74ALVC240MTCX	Same 5-V tolerant I/O, but 1.65–3.6-V V_CC; higher ICC (5 mA vs. 0.19 mA in 3-state).	Compatible pinout but higher quiescent current limits use in always-on monitoring circuits.	Choose when footprint compatibility with older ALVC designs is required and 3.3-V-only supply is confirmed.

Compared with SN74LVT240ADGVRG4, SN74LVC240APWR lacks 5-V I/O tolerance and drive strength, making it unsuitable for legacy bus interfacing; 74ALVC240MTCX matches I/O capability but increases static power in standby, impacting battery-powered or thermally constrained deployments.

Availability

SN74LVT240ADGVRG4 is available at Aetrix Electronics and suitable for industrial backplane driver, PCI bus interface, memory address latching, and test equipment signal conditioning applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74LVT240ADGVRG4 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 logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVT240ADGVRG4 belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for high-speed, mixed-voltage system interfacing with robust hot-swap and ESD resilience.

FAQ

What is the maximum supply voltage for SN74LVT240ADGVRG4?

The absolute maximum supply voltage (V_CC) for SN74LVT240ADGVRG4 is 4.6 V. However, the recommended operating range is strictly 2.7 V to 3.6 V. Operation above 3.6 V risks parametric degradation and violates the device's qualified specification limits, even if no immediate failure occurs. Always maintain V_CC within this window for reliable SN74LVT240ADGVRG4 performance.

Does SN74LVT240ADGVRG4 support true 5-V input compatibility?

Yes, SN74LVT240ADGVRG4 accepts input voltages up to 5.5 V regardless of V_CC level, verified per its absolute maximum rating and VI specification. This allows direct connection to 5-V TTL or CMOS outputs without external level-shifting components, a core feature confirmed in the SCBS134K datasheet's "Input voltage range" and functional description.

How does SN74LVT240ADGVRG4 handle power-up sequencing?

SN74LVT240ADGVRG4 incorporates power-up 3-state circuitry that forces all outputs into high-impedance when V_CC is between 0 V and 1.5 V. This prevents bus contention during power ramp-up. For guaranteed high-Z above 1.5 V, OE pins must be pulled high via resistor - minimum value determined by driver sink capability, as specified in the SN74LVT240ADGVRG4 datasheet.

What is the thermal resistance (θ_JA) of the SN74LVT240ADGVRG4 package?

The SN74LVT240ADGVRG4 uses the TVSOP (DGV) package, which has a documented junction-to-ambient thermal resistance (θ_JA) of 92°C/W under standard JEDEC test conditions. This value is critical for calculating maximum allowable power dissipation in ambient temperatures up to 85°C and must be applied with appropriate PCB copper area per TI's thermal guidelines.

Can SN74LVT240ADGVRG4 replace SN74LVT240ADBR in the same PCB layout?

No - SN74LVT240ADGVRG4 (TVSOP-20, 0.5-mm pitch) and SN74LVT240ADBR (SSOP-20, 0.65-mm pitch) have incompatible footprints and land patterns. Their pinouts are identical, but mechanical dimensions, lead pitch, and solder mask requirements differ. Direct replacement requires PCB redesign; consult TI's DB0020A (SSOP) and DGV package drawings before migration.

SN74LVT240ADGVRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

Package/Case:: 20-TFSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

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-TVSOP

SN74LVT240ADGVRG4 FAQ

1.How can I place an order for SN74LVT240ADGVRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT240ADGVRG4 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 SN74LVT240ADGVRG4 reliable?

The price and inventory of SN74LVT240ADGVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT240ADGVRG4 is usually 5 days.

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SN74LVT240ADGVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT240ADGVRG4 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 SN74LVT240ADGVRG4?

For technical support, including SN74LVT240ADGVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT240ADGVRG4 requirements.

6.How does Aetrix verify that SN74LVT240ADGVRG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVT240ADGVRG4 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 SN74LVT240ADGVRG4 meets industry standards.

7.What is the process for return or replacement of SN74LVT240ADGVRG4?

All SN74LVT240ADGVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT240ADGVRG4, 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 SN74LVT240ADGVRG4 part is unused and in its original packaging.

Return procedure for SN74LVT240ADGVRG4:

1.Submit a request within 90 days.

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

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