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

Texas Instruments SN74LVT244BPWG4

Name: SN74LVT244BPWG4
Brand: Texas Instruments
SKU: SN74LVT244BPWG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT244BPWG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVT244BPWG4.pdf

Description:: IC BUF NON-INVERT 3.6V 20TSSOP

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Product details

Overview

SN74LVT244BPWG4 from Texas Instruments is a 3.3-V ABT octal buffer/driver with 3-state outputs, designed for mixed-mode signal operation between 5-V inputs and 3.3-V V_CC. It features dual 4-bit drivers with independent output-enable (OE) controls, supports hot insertion via I_off and power-up 3-state, and operates down to 2.7 V for unregulated battery systems.

For engineers reviewing the SN74LVT244BPWG4 datasheet, SN74LVT244BPWG4 pinout, SN74LVT244BPWG4 application, or SN74LVT244BPWG4 equivalent, key selection criteria include 3.3-V logic compatibility with 5-V TTL interfaces, low ground bounce (<0.8 V), latch-up immunity (>100 mA), ESD robustness (2000-V HBM), and TSSOP-20 packaging for space-constrained board layouts.

Technical Context

The SN74LVT244BPWG4 implements two independent 4-bit noninverting buffers, each controlled by a dedicated OE input (1OE and 2OE). When OE is low, data passes from A inputs to Y outputs; when high, outputs enter high-impedance state. Its ABT (Advanced BiCMOS Technology) architecture enables fast switching (t_PLH/t_PHL ≤ 3.5 ns at V_CC = 3.3 V) while maintaining rail-to-rail output drive capability.

Designed for hot-swap environments, the device integrates I_off circuitry to block reverse current during power-down and power-up 3-state logic to hold outputs in high-Z during supply ramping. Input tolerance up to 7 V and output voltage range of −0.5 V to V_CC + 0.5 V ensure interoperability across mixed-voltage domains 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 under unregulated battery supply or noisy 3.3-V rails.
I_OL / I_OH	64 mA / −32 mA - Supports driving heavy capacitive loads or multiple CMOS/TTL inputs without external buffering.
t_PLH/t_PHL	≤3.5 ns @ V_CC = 3.3 V - Meets timing requirements for high-speed bus buffering in memory or peripheral interfaces.
V_IK	−1.2 V @ I_I = −18 mA - Ensures reliable negative input clamping during transient events or undershoot.
V_OHP / V_OLP	<0.8 V typical ground bounce - Minimizes noise coupling into shared ground planes in dense digital systems.
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM - Qualifies for industrial and automotive assembly environments without additional protection.
Latch-up	>100 mA per JESD 78 Class II - Guarantees immunity to destructive latch-up under overvoltage or ESD stress.

Pinout & Package

TSSOP-20 package (PW), 6.5 mm × 4.4 mm × 1.2 mm max height, with exposed thermal pad (not electrically connected), lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Independent control of each 4-bit buffer group; tie to V_CC via pullup for safe power-up high-Z state.
1A1–1A4, 2A1–2A4	Data inputs	Noninverting inputs accepting 5-V tolerant signals; VI up to 7 V ensures compatibility with legacy 5-V logic.
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive 3.3-V logic loads; high-impedance state prevents bus contention during system reset or standby.
V_CC	Supply voltage	3.3-V nominal; supports down to 2.7 V for brownout resilience in portable applications.
GND	Ground reference	Dedicated ground pin (Pin 10) minimizes ground bounce; layout best practice requires short, low-inductance trace to plane.

Key Features

Feature	Design Value
Mixed-mode signal operation	5-V input tolerance with 3.3-V V_CC eliminates need for external level shifters in hybrid voltage systems.
Hot-insertion support	I_off and power-up 3-state prevent backdrive current and bus conflicts during live card replacement.
Low ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V ensures signal integrity on shared PCB ground planes with sensitive analog sections.
Wide operating temperature	−40°C to +85°C rating supports deployment in industrial control, telecom infrastructure, and embedded computing.
High ESD/latch-up immunity	Exceeds JESD 22 and JESD 78 Class II standards, reducing field failure risk in handling and end-use environments.

Applications

Memory Interface Buffering	Industrial Backplane Driver
Use Scenario: Buffering address/data lines between a 3.3-V microcontroller and 5-V SRAM or Flash memory in an industrial PLC. IC Role / Device Role / Timing Role: Noninverting octal driver providing level translation and fanout expansion while maintaining setup/hold timing margins. Use Value: Eliminates discrete level shifters, reduces BOM count, and guarantees t_PLH/t_PHL ≤ 3.5 ns to meet memory access timing at 100+ MHz bus speeds.	Use Scenario: Driving parallel control signals across a 200-mm backplane in a modular test equipment rack with mixed 3.3-V and 5-V modules. IC Role / Device Role / Timing Role: Bus driver isolating source and load sides; 3-state outputs enable dynamic bus arbitration and hot-swap capability. Use Value: I_off protection prevents damage during module insertion/removal; 64-mA drive strength ensures signal integrity over long traces.
Automotive Diagnostic Interface	Legacy Peripheral Adapter
Use Scenario: Interfacing a modern 3.3-V CAN controller MCU to legacy 5-V diagnostic tools (e.g., OBD-II adapters) in vehicle service bays. IC Role / Device Role / Timing Role: Voltage-tolerant buffer enabling bidirectional communication without external voltage translators. Use Value: 7-V input rating handles automotive transients; −40°C to +85°C operation meets AEC-Q100 ambient requirements.	Use Scenario: Adapting a 3.3-V FPGA I/O bank to legacy 5-V parallel peripherals such as dot-matrix displays or stepper motor controllers. IC Role / Device Role / Timing Role: Logic-level translator and current booster ensuring reliable signal transmission across voltage domain boundaries. Use Value: Eliminates need for discrete resistor networks or dedicated level-shifter ICs, lowering cost and board area.

Memory Interface Buffering

Industrial Backplane Driver

Use Scenario: Buffering address/data lines between a 3.3-V microcontroller and 5-V SRAM or Flash memory in an industrial PLC.

IC Role / Device Role / Timing Role: Noninverting octal driver providing level translation and fanout expansion while maintaining setup/hold timing margins.

Use Value: Eliminates discrete level shifters, reduces BOM count, and guarantees t_PLH/t_PHL ≤ 3.5 ns to meet memory access timing at 100+ MHz bus speeds.

Use Scenario: Driving parallel control signals across a 200-mm backplane in a modular test equipment rack with mixed 3.3-V and 5-V modules.

IC Role / Device Role / Timing Role: Bus driver isolating source and load sides; 3-state outputs enable dynamic bus arbitration and hot-swap capability.

Use Value: I_off protection prevents damage during module insertion/removal; 64-mA drive strength ensures signal integrity over long traces.

Automotive Diagnostic Interface

Legacy Peripheral Adapter

Use Scenario: Interfacing a modern 3.3-V CAN controller MCU to legacy 5-V diagnostic tools (e.g., OBD-II adapters) in vehicle service bays.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer enabling bidirectional communication without external voltage translators.

Use Value: 7-V input rating handles automotive transients; −40°C to +85°C operation meets AEC-Q100 ambient requirements.

Use Scenario: Adapting a 3.3-V FPGA I/O bank to legacy 5-V parallel peripherals such as dot-matrix displays or stepper motor controllers.

IC Role / Device Role / Timing Role: Logic-level translator and current booster ensuring reliable signal transmission across voltage domain boundaries.

Use Value: Eliminates need for discrete resistor networks or dedicated level-shifter ICs, lowering cost and board area.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVTH244APW	Lower drive strength (I_OL = 24 mA), no I_off, 2.7–3.6 V only - lacks hot-insertion support.	Suitable for static, non-hot-swap designs where lower power and cost are prioritized over robustness.	Select when hot-swap is not required and system-level ESD protection is already implemented externally.
74ALVC244PW	3.3-V only (no 5-V input tolerance), higher speed (t_PD ≈ 2.3 ns), same TSSOP-20 footprint.	Better for pure 3.3-V systems needing minimal propagation delay but incompatible with 5-V signal sources.	Choose when interfacing exclusively with 3.3-V logic and maximum timing margin is critical.

Compared with SN74LVTH244APW and 74ALVC244PW, the SN74LVT244BPWG4 uniquely combines 5-V input tolerance, hot-insertion capability, and 64-mA drive strength in a single TSSOP-20 package-making it the only option among the three qualified for mixed-voltage, field-serviceable systems.

Availability

SN74LVT244BPWG4 is available at Aetrix Electronics and suitable for industrial control systems, automotive diagnostic interfaces, and legacy peripheral adapters requiring stable component supply with guaranteed long-term availability and full traceability.

Supply support for SN74LVT244BPWG4 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 decades of experience in high-reliability logic and interface solutions.

The SN74LVT244BPWG4 belongs to TI's ABT logic family, engineered for robust mixed-voltage interfacing in industrial, telecom, and automotive applications where signal integrity, hot-swap resilience, and wide supply tolerance are critical.

FAQ

What is the maximum input voltage the SN74LVT244BPWG4 can tolerate?

The SN74LVT244BPWG4 supports an input voltage range of −0.5 V to 7 V, enabling direct connection to 5-V TTL outputs without external level-shifting components. This 5-V input tolerance is maintained across the full operating temperature range (−40°C to +85°C) and supply voltage range (2.7 V to 3.6 V).

Does the SN74LVT244BPWG4 support hot insertion, and how is it implemented?

Yes, the SN74LVT244BPWG4 supports hot insertion through integrated I_off circuitry and power-up 3-state logic. The I_off feature disables outputs during power-down to prevent damaging back-current flow, while the power-up 3-state holds outputs in high-impedance until V_CC stabilizes - both features are inherent to the SN74LVT244BPWG4 silicon design.

What is the recommended pull-up resistor value for OE pins on the SN74LVT244BPWG4?

The minimum pull-up resistor value for OE pins on the SN74LVT244BPWG4 is determined by the current-sinking capability of the driving source. TI recommends tying OE to V_CC through a pullup resistor to ensure high-impedance state during power-up; typical values range from 4.7 kΩ to 10 kΩ depending on driver strength and noise immunity requirements.

Can the SN74LVT244BPWG4 be used in battery-powered systems with variable supply voltage?

Yes, the SN74LVT244BPWG4 is explicitly designed for unregulated battery operation down to 2.7 V, with full functionality maintained across its 2.7–3.6 V V_CC range. Its low ground bounce (<0.8 V) and stable switching characteristics make it suitable for portable instrumentation and handheld diagnostic tools powered by Li-ion or alkaline cells.

Is the thermal pad on the SN74LVT244BPWG4 TSSOP package electrically connected?

No, the exposed thermal pad on the SN74LVT244BPWG4 TSSOP (PW) package is not electrically connected to any internal node. It is intended solely for thermal dissipation and mechanical stability; TI recommends soldering it to a PCB thermal plane using standard reflow profiles, but no electrical routing is required or advised.

SN74LVT244BPWG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

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

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Logic Type:: Buffer, Non-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-TSSOP

SN74LVT244BPWG4 FAQ

1.How can I place an order for SN74LVT244BPWG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT244BPWG4 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 SN74LVT244BPWG4 reliable?

The price and inventory of SN74LVT244BPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244BPWG4 is usually 5 days.

3.What payment methods are accepted for SN74LVT244BPWG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT244BPWG4 transactions.

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4.How is shipping managed for SN74LVT244BPWG4?

SN74LVT244BPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT244BPWG4 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 SN74LVT244BPWG4?

For technical support, including SN74LVT244BPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244BPWG4 requirements.

6.How does Aetrix verify that SN74LVT244BPWG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVT244BPWG4 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 SN74LVT244BPWG4 meets industry standards.

7.What is the process for return or replacement of SN74LVT244BPWG4?

All SN74LVT244BPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244BPWG4, 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 SN74LVT244BPWG4 part is unused and in its original packaging.

Return procedure for SN74LVT244BPWG4:

1.Submit a request within 90 days.

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

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