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

Texas Instruments SN74LVTH244APWR

Name: SN74LVTH244APWR
Brand: Texas Instruments
SKU: SN74LVTH244APWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH244APWR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVTH244APWR.pdf

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

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Product details

Overview

SN74LVTH244APWR 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 features bus-hold on all data inputs, I_off support for hot insertion, and operates from 2.7 V to 3.6 V. Used in level-shifting interfaces between 3.3-V logic and legacy 5-V systems.

For engineers reviewing the SN74LVTH244APWR datasheet, SN74LVTH244APWR pinout, SN74LVTH244APWR application, or SN74LVTH244APWR equivalent, key selection criteria include its 20-pin TSSOP package, 3-state enable control per 4-bit group, bus-hold elimination of external pull resistors, and guaranteed 32-mA low-level output drive at 3 V.

Technical Context

The SN74LVTH244APWR implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control (1OE for Y1–Y4, 2OE for Y5–Y8). Its ABT (Advanced BiCMOS Technology) architecture enables TTL-compatible input thresholds while operating at 3.3-V supply, supporting bidirectional voltage translation without external components.

Power-up 3-state and I_off circuitry ensure high-impedance outputs during power sequencing, preventing bus contention. Bus-hold inputs maintain valid logic states on floating A-inputs with ±750 µA dynamic hold current at 3.6 V, eliminating need for external biasing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V without functional degradation
I_OL (max)	64 mA at V_CC = 3 V - drives heavy capacitive loads or multiple TTL inputs directly
t_PZH/t_PZL	4.5 ns typical (V_CC = 3.3 V) - fast enable/disable transitions minimize bus turnaround latency
Bus-Hold Current	±750 µA at V_CC = 3.6 V - actively holds unused inputs without external resistors
I_off	±100 µA at V_CC = 0 V - blocks backflow current during hot insertion or partial power-down
V_OH/V_OL	2.0 V min / 0.55 V max at I_OL = 64 mA - ensures robust noise margins in 3.3-V systems
Input Voltage Range	−0.5 V to 7 V - accepts 5-V TTL signals safely with 3.3-V V_CC

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, 1.2 mm max height, exposed thermal pad optional for enhanced thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Controls 4-bit groups independently; must be pulled high via resistor for safe power-up state
1A1–1A4, 2A1–2A4	Data inputs	Bus-hold enabled; tolerate floating states without external pullup/pulldown
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive 5-V TTL loads from 3.3-V supply; high-Z when OE = high
V_CC, GND	Power supply terminals	Single 3.3-V rail; decoupling required within 10 mm of pins 10 and 11

Key Features

Feature	Design Value
Mixed-mode interface	Accepts 5-V TTL inputs and drives 5-V TTL loads while powered from 3.3-V rail
Hot-insertion support	I_off and power-up 3-state prevent damaging current flow during live board insertion
Bus-hold circuitry	Eliminates need for 10-kΩ external pull resistors on all eight data inputs
Output ground bounce	V_OLP < 0.8 V at V_CC = 3.3 V - reduces switching noise in dense PCB layouts
Latch-up immunity	Exceeds 500 mA per JESD 17 - robust against transient overvoltage events

Applications

Industrial Control Backplane Interface	Automotive Body Control Module
Use Scenario: Interfacing 3.3-V microcontroller GPIOs to legacy 5-V sensor buses in PLC racks. IC Role / Device Role / Timing Role: Level-shifting octal buffer enabling bidirectional communication across voltage domains. Use Value: Eliminates discrete level translators and pull resistors, reducing BOM count by ≥9 components per interface.	Use Scenario: Driving 5-V solenoid control lines from a 3.3-V automotive MCU in door module assemblies. IC Role / Device Role / Timing Role: High-current 3-state driver with fast disable timing to prevent actuator chatter during reset. Use Value: 64-mA sink capability directly drives solenoids without external transistor stages.
Test Equipment Signal Conditioning	Medical Diagnostic Data Acquisition
Use Scenario: Isolating DUT digital control signals from 5-V test instrumentation using 3.3-V FPGA I/O. IC Role / Device Role / Timing Role: Bidirectional buffer with independent OE control for precise timing of stimulus/response cycles. Use Value: 4.5-ns typical enable delay ensures sub-5-ns bus turnaround for high-speed pattern generation.	Use Scenario: Buffering ADC serial interface lines (SDO, SCLK) between 3.3-V precision ADC and 5-V host controller. IC Role / Device Role / Timing Role: Noise-immune signal repeater with bus-hold maintaining valid logic during SPI idle periods. Use Value: ±750-µA bus-hold current prevents false clock edges caused by floating lines in low-power sleep modes.

Industrial Control Backplane Interface

Automotive Body Control Module

Use Scenario: Interfacing 3.3-V microcontroller GPIOs to legacy 5-V sensor buses in PLC racks.

IC Role / Device Role / Timing Role: Level-shifting octal buffer enabling bidirectional communication across voltage domains.

Use Value: Eliminates discrete level translators and pull resistors, reducing BOM count by ≥9 components per interface.

Use Scenario: Driving 5-V solenoid control lines from a 3.3-V automotive MCU in door module assemblies.

IC Role / Device Role / Timing Role: High-current 3-state driver with fast disable timing to prevent actuator chatter during reset.

Use Value: 64-mA sink capability directly drives solenoids without external transistor stages.

Test Equipment Signal Conditioning

Medical Diagnostic Data Acquisition

Use Scenario: Isolating DUT digital control signals from 5-V test instrumentation using 3.3-V FPGA I/O.

IC Role / Device Role / Timing Role: Bidirectional buffer with independent OE control for precise timing of stimulus/response cycles.

Use Value: 4.5-ns typical enable delay ensures sub-5-ns bus turnaround for high-speed pattern generation.

Use Scenario: Buffering ADC serial interface lines (SDO, SCLK) between 3.3-V precision ADC and 5-V host controller.

IC Role / Device Role / Timing Role: Noise-immune signal repeater with bus-hold maintaining valid logic during SPI idle periods.

Use Value: ±750-µA bus-hold current prevents false clock edges caused by floating lines in low-power sleep modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC244APWR	No bus-hold; lower drive (24 mA), 1.65–3.6 V V_CC; no 5-V tolerant inputs	Suitable only for pure 3.3-V systems; requires external pull resistors if inputs float	Select when cost sensitivity outweighs mixed-voltage needs and board space allows pull resistors
SN74AHCT244PW	5-V only supply (4.5–5.5 V); TTL-compatible inputs/outputs; no I_off or bus-hold	Requires level-shifter for 3.3-V MCU interfacing; not hot-insertion capable	Choose only in legacy 5-V-only designs where ABT advantages are unnecessary

Compared with SN74LVC244APWR and SN74AHCT244PW, the SN74LVTH244APWR uniquely combines 5-V input tolerance, bus-hold, I_off, and 3.3-V operation-enabling single-chip mixed-voltage interfacing without design compromises.

Availability

SN74LVTH244APWR is available at Aetrix Electronics and suitable for industrial control backplanes, automotive body electronics, and medical data acquisition systems requiring stable component supply across extended product lifecycles.

Supply support for SN74LVTH244APWR 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 SN74LVTH244A product line delivers advanced bus-interface solutions for mixed-voltage system integration, targeting applications where 3.3-V logic must interoperate reliably with legacy 5-V infrastructure.

FAQ

What is the maximum input voltage rating for SN74LVTH244APWR?

The SN74LVTH244APWR supports input voltages up to 7 V, enabling direct connection to 5-V TTL signals while powered from a 3.3-V supply. This 5-V tolerance is guaranteed across the full operating temperature range (−40°C to 85°C) and eliminates need for external clamping diodes or level-shifters in mixed-voltage designs.

Does SN74LVTH244APWR require external pull-up resistors on its inputs?

No, SN74LVTH244APWR does not require external pull-up or pull-down resistors due to integrated bus-hold circuitry on all eight data inputs. The bus-hold maintains valid logic states on floating inputs with ±750 µA dynamic hold current at 3.6 V, simplifying PCB layout and reducing component count.

Can SN74LVTH244APWR be used in hot-swap applications?

Yes, SN74LVTH244APWR is explicitly designed for hot-insertion applications. Its I_off circuitry disables outputs when V_CC = 0 V, preventing damaging current backflow, and power-up 3-state ensures outputs remain high-impedance during power sequencing-both critical for live backplane insertion.

What is the recommended power-supply decoupling for SN74LVTH244APWR?

Place a 0.1-µF ceramic capacitor between V_CC (pin 10) and GND (pin 11) within 10 mm of the SN74LVTH244APWR package. For systems with high switching activity, add a 4.7-µF bulk capacitor nearby. This minimizes supply noise and ensures stable operation under 64-mA output load transients.

How does the output-enable logic work on SN74LVTH244APWR?

SN74LVTH244APWR has two active-low output-enable inputs: 1OE (pin 1) controls Y1–Y4, and 2OE (pin 19) controls Y5–Y8. When an OE pin is low, corresponding outputs pass A-inputs to Y-outputs; when high, outputs enter high-impedance state. Tie OE pins to V_CC via pull-up resistors for safe power-up behavior.

SN74LVTH244APWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

SN74LVTH244APWR FAQ

1.How can I place an order for SN74LVTH244APWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH244APWR 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 SN74LVTH244APWR reliable?

The price and inventory of SN74LVTH244APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH244APWR is usually 5 days.

3.What payment methods are accepted for SN74LVTH244APWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH244APWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH244APWR?

SN74LVTH244APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH244APWR 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 SN74LVTH244APWR?

For technical support, including SN74LVTH244APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH244APWR requirements.

6.How does Aetrix verify that SN74LVTH244APWR is sourced from the original manufacturer or authorized distributors?

All SN74LVTH244APWR 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 SN74LVTH244APWR meets industry standards.

7.What is the process for return or replacement of SN74LVTH244APWR?

All SN74LVTH244APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH244APWR, 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 SN74LVTH244APWR part is unused and in its original packaging.

Return procedure for SN74LVTH244APWR:

1.Submit a request within 90 days.

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

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