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

Texas Instruments SN74LVTH244APWG4

Name: SN74LVTH244APWG4
Brand: Texas Instruments
SKU: SN74LVTH244APWG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH244APWG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVTH244APWG4.pdf

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

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Product details

Overview

SN74LVTH244APWG4 from Texas Instruments is a 3.3-V ABT octal buffer/driver with 3-state outputs, designed for mixed-mode signal operation (5-V inputs/outputs with 3.3-V V_CC). It delivers 64 mA low-level output current, supports unregulated battery operation down to 2.7 V, and features bus-hold circuitry eliminating external pullup/pulldown resistors - used in industrial backplane interface and legacy TTL-to-LVCMOS level translation.

For engineers reviewing the SN74LVTH244APWG4 datasheet, SN74LVTH244APWG4 pinout, SN74LVTH244APWG4 application, or SN74LVTH244APWG4 equivalent, key selection criteria include its I_off support for hot insertion, 3.3-V V_CC compatibility with 5-V tolerant inputs, 20-pin TSSOP (PW) package thermal performance (θ_JA = 83°C/W), and guaranteed 3-state behavior during power-up/power-down.

Technical Context

This device integrates two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control. Its ABT logic family enables TTL-compatible input thresholds while operating at 3.3-V supply, supporting bidirectional voltage translation between 5-V and 3.3-V domains without level-shifter ICs.

The active bus-hold circuitry maintains valid logic states on floating data inputs (±750 µA hold current at V_CC = 3.6 V), and I_off protection disables outputs when V_CC = 0, preventing backflow current during hot insertion. Power-up 3-state ensures outputs remain high-impedance until V_CC stabilizes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports wide-input unregulated battery rails and brownout resilience
I_OL (max)	64 mA - drives heavy capacitive loads or multiple TTL inputs directly
t_PLH/t_PHL	2.3 ns (typ) at V_CC = 3.3 V - enables high-speed bus buffering in 50-MHz+ systems
Input Voltage Tolerance	−0.5 V to 7 V - accepts 5-V logic signals safely with no external clamping
Bus-Hold Current	±750 µA - eliminates need for external biasing resistors on unused data lines
ESD Protection	2000-V HBM, 200-V MM - meets industrial-grade robustness requirements
θ_JA	83°C/W (TSSOP-PW) - defines thermal derating for continuous 64-mA output operation

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, 0.65 mm lead pitch, exposed thermal pad optional per design.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 17, 18, 19, 20	Data Inputs (1A1–1A4, 2A1–2A4)	Noninverting inputs for two independent 4-bit channels; accept 5-V-tolerant logic levels
5, 16	Output Enables (1OE, 2OE)	Active-low controls: drive outputs when low; high-impedance when high - supports independent channel gating
6, 7, 8, 9, 12, 13, 14, 15	Outputs (1Y1–1Y4, 2Y1–2Y4)	3-state buffered outputs with 64 mA sink capability; tolerate 5-V signals in high-Z state
10	GND	Ground reference for all logic and output stages; must be low-inductance connection
11	V_CC	3.3-V supply input; bypassing with 0.1 µF ceramic capacitor required near pin

Key Features

Feature	Design Value
Mixed-mode 5-V/3.3-V interface	Enables direct connection between legacy 5-V microcontrollers and modern 3.3-V FPGAs without discrete level shifters
Hot-insertion support	I_off and power-up 3-state prevent bus contention and backdrive damage during live board replacement
Integrated bus-hold	Holds floating inputs at valid logic levels, reducing BOM count and PCB layout complexity
Low ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V - minimizes noise coupling into adjacent digital or analog circuits
Latch-up immunity	>500 mA per JESD 17 - ensures reliability in noisy industrial environments with transient surges

Applications

Industrial Backplane Interface	Legacy System Bus Translation
Use Scenario: Interfacing a 3.3-V FPGA to a 5-V ISA-style backplane carrying address/data/control signals. IC Role / Device Role / Timing Role: Octal buffer providing direction-controlled, 3-state isolation and voltage translation between domains. Use Value: Eliminates need for eight discrete level shifters; bus-hold prevents glitches during partial bus arbitration.	Use Scenario: Upgrading a 5-V microcontroller-based test instrument with a 3.3-V ADC/DAC subsystem. IC Role / Device Role / Timing Role: Bidirectional buffer isolating 5-V control lines from 3.3-V peripheral logic while maintaining timing integrity. Use Value: 2.3 ns propagation delay preserves setup/hold margins; I_off protects peripherals during power sequencing.
Hot-Swappable Module Control	Embedded Controller I/O Expansion
Use Scenario: Managing enable/disable of field-replaceable modules in telecom shelf management systems. IC Role / Device Role / Timing Role: Output driver enabling/disabling module reset, clock, or configuration lines via hot-swap controller signals. Use Value: Power-up 3-state prevents spurious resets; ±750 µA bus-hold maintains safe default states on disconnected modules.	Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU for industrial sensor monitoring and actuator control. IC Role / Device Role / Timing Role: Parallel I/O expander buffering MCU port pins to drive LED arrays, relays, and optocouplers. Use Value: 64 mA per output drives 10-mA LEDs directly; 2.7–3.6 V V_CC range matches typical embedded power rails.

Industrial Backplane Interface

Legacy System Bus Translation

Use Scenario: Interfacing a 3.3-V FPGA to a 5-V ISA-style backplane carrying address/data/control signals.

IC Role / Device Role / Timing Role: Octal buffer providing direction-controlled, 3-state isolation and voltage translation between domains.

Use Value: Eliminates need for eight discrete level shifters; bus-hold prevents glitches during partial bus arbitration.

Use Scenario: Upgrading a 5-V microcontroller-based test instrument with a 3.3-V ADC/DAC subsystem.

IC Role / Device Role / Timing Role: Bidirectional buffer isolating 5-V control lines from 3.3-V peripheral logic while maintaining timing integrity.

Use Value: 2.3 ns propagation delay preserves setup/hold margins; I_off protects peripherals during power sequencing.

Hot-Swappable Module Control

Embedded Controller I/O Expansion

Use Scenario: Managing enable/disable of field-replaceable modules in telecom shelf management systems.

IC Role / Device Role / Timing Role: Output driver enabling/disabling module reset, clock, or configuration lines via hot-swap controller signals.

Use Value: Power-up 3-state prevents spurious resets; ±750 µA bus-hold maintains safe default states on disconnected modules.

Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU for industrial sensor monitoring and actuator control.

IC Role / Device Role / Timing Role: Parallel I/O expander buffering MCU port pins to drive LED arrays, relays, and optocouplers.

Use Value: 64 mA per output drives 10-mA LEDs directly; 2.7–3.6 V V_CC range matches typical embedded power rails.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC244APWR	Lower drive strength (24 mA I_OL), no bus-hold, 1.65–3.6 V V_CC range	Suitable only for low-capacitance, fully driven buses; requires external pullups if inputs float	Select when cost sensitivity outweighs drive strength and bus-hold needs
SN74ALVC244PWR	Higher speed (1.9 ns t_PHL), 1.65–3.6 V V_CC, no bus-hold, lower I_OL (24 mA)	Better for high-frequency clock distribution but lacks hot-insertion protection and 5-V tolerance	Choose for speed-critical 3.3-V-only systems where I_off and 5-V compatibility are unnecessary

Compared with SN74LVC244APWR and SN74ALVC244PWR, the SN74LVTH244APWG4 uniquely combines 5-V-tolerant inputs, 64 mA drive, integrated bus-hold, and I_off-enabled hot insertion - making it irreplaceable in mixed-voltage, high-reliability industrial interfaces.

Availability

SN74LVTH244APWG4 is available at Aetrix Electronics and suitable for industrial backplane interface, legacy system bus translation, and hot-swappable module control requiring stable component supply across extended temperature ranges (−40°C to 85°C).

Supply support for SN74LVTH244APWG4 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The SN74LVTH244A product line delivers ABT-family octal buffers optimized for mixed-voltage system interfacing, targeting applications where 3.3-V logic must interoperate reliably with legacy 5-V infrastructure.

FAQ

What is the maximum output current rating for SN74LVTH244APWG4?

The SN74LVTH244APWG4 supports up to 64 mA of low-level output current (I_OL) per channel at V_CC = 3.3 V, enabling direct drive of multiple TTL loads or moderate-current peripherals without external amplification. This rating is specified under recommended operating conditions and verified across the full −40°C to 85°C temperature range.

Does SN74LVTH244APWG4 support hot-plug operation?

Yes, SN74LVTH244APWG4 supports hot-plug operation via dual mechanisms: I_off circuitry disables outputs when V_CC = 0 to prevent backflow current, and power-up 3-state holds outputs in high-impedance until V_CC stabilizes - both confirmed in TI's SCAS586J datasheet Section 2.

Can SN74LVTH244APWG4 accept 5-V input signals while powered from 3.3 V?

Yes, SN74LVTH244APWG4 accepts input voltages up to 7 V (including 5-V TTL levels) while operating at V_CC = 3.3 V, with no external components required. This 5-V tolerance is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.

What package type and dimensions does SN74LVTH244APWG4 use?

SN74LVTH244APWG4 uses the TSSOP-20 (PW) package: 6.5 mm × 4.4 mm footprint, 1.2 mm maximum height, 0.65 mm lead pitch, and RoHS-compliant NiPdAu lead finish. The package drawing PW0020A and thermal data (θ_JA = 83°C/W) are published by Texas Instruments.

Is bus-hold functionality enabled by default on SN74LVTH244APWG4 data inputs?

Yes, bus-hold circuitry is internal and always active on all eight data inputs of SN74LVTH244APWG4 - no configuration or external components needed. It provides ±750 µA dynamic hold current at V_CC = 3.6 V to maintain valid logic states on floating inputs, as documented in the Electrical Characteristics table (II(hold)).

SN74LVTH244APWG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

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

Packaging:: Bulk

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

SN74LVTH244APWG4 FAQ

1.How can I place an order for SN74LVTH244APWG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH244APWG4 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 SN74LVTH244APWG4 reliable?

The price and inventory of SN74LVTH244APWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH244APWG4 is usually 5 days.

3.What payment methods are accepted for SN74LVTH244APWG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH244APWG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH244APWG4?

SN74LVTH244APWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH244APWG4 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 SN74LVTH244APWG4?

For technical support, including SN74LVTH244APWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH244APWG4 requirements.

6.How does Aetrix verify that SN74LVTH244APWG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVTH244APWG4 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 SN74LVTH244APWG4 meets industry standards.

7.What is the process for return or replacement of SN74LVTH244APWG4?

All SN74LVTH244APWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH244APWG4, 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 SN74LVTH244APWG4 part is unused and in its original packaging.

Return procedure for SN74LVTH244APWG4:

1.Submit a request within 90 days.

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

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