Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74LVT244BRGYR

Name: SN74LVT244BRGYR
Brand: Texas Instruments
SKU: SN74LVT244BRGYR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LVT244BRGYR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-VFQFN Exposed Pad

Datasheet:: SN74LVT244BRGYR.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,073

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74LVT244BRGYR 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), supporting unregulated battery operation down to 2.7 V and featuring I_off and power-up 3-state for hot insertion. It delivers t_PLH/t_PHL ≤ 3.5 ns at V_CC = 3.3 V and drives up to 64 mA low-level output current in industrial temperature range (−40°C to 85°C).

For engineers reviewing the SN74LVT244BRGYR datasheet, SN74LVT244BRGYR pinout, SN74LVT244BRGYR application, or SN74LVT244BRGYR equivalent, this page provides verified functional specifications, thermal performance data (θ_JA = 37°C/W), hot-insertion design guidance, and validated alternative part comparisons for bus interface and level-shifting use cases.

Technical Context

The SN74LVT244BRGYR implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control. Its Advanced BiCMOS Technology (ABT) enables TTL-compatible input thresholds while operating from a 3.3-V supply, allowing direct interfacing between 5-V legacy logic and 3.3-V systems without external level shifters.

It integrates I_off circuitry that disables outputs during power-down to prevent backflow current, and power-up 3-state logic that holds outputs high-impedance during V_CC ramp-up-critical for live insertion into backplane or modular systems. Latch-up immunity exceeds 100 mA per JESD 78 Class II.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated Li-ion or buck-converter supplies without external regulation
I_OL (Max)	64 mA - drives standard TTL loads and short PCB traces without buffering
t_PLH/t_PHL	≤3.5 ns at V_CC = 3.3 V - meets timing budgets for 100-MHz bus interfaces
θ_JA	37°C/W - superior thermal dissipation vs. SOIC/TSSOP packages, enabling higher density layouts
I_off	±100 μA at V_CC = 0 - prevents damaging backfeed current during hot-swap events
ESD Rating	2000-V HBM - robust enough for manual handling and board-level assembly without special ESD controls
Operating Temp	−40°C to 85°C - qualified for industrial and automotive under-hood auxiliary modules

Pinout & Package

VQFN-20 (RGY) package: 3.5 mm × 4.5 mm, 0.5-mm pitch, exposed thermal pad (Pin 21), 1-mm max height. Requires soldering of thermal pad for mechanical stability and thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Independent control of each 4-bit buffer group; tie high via pullup for safe power-up state
1A1–1A4, 2A1–2A4	Data inputs	TTL-compatible inputs accept 0–5.5 V; no level-shifter needed for 5-V source signals
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive bidirectional buses; high-impedance when OE = high prevents contention
V_CC (Pin 11)	Supply voltage	3.3-V nominal; operates down to 2.7 V-enables brownout tolerance in battery-powered systems
GND (Pin 10)	Ground reference	Low-inductance return path required; adjacent to thermal pad for noise reduction

Key Features

Feature	Design Value
Mixed-mode signal operation	Accepts 5-V inputs and drives 5-V loads while powered from 3.3-V rail-eliminates discrete level translators
Hot-insertion support	I_off + power-up 3-state ensures zero backfeed and glitch-free insertion into live backplanes
Output ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V - maintains signal integrity on shared ground planes
Latch-up immunity	>100 mA per JESD 78 Class II - survives transient overcurrent events in noisy industrial environments
Thermal performance	θ_JA = 37°C/W - enables higher channel density vs. SOIC (58°C/W) or TSSOP (83°C/W) variants

Applications

PCI Bus Interface	Industrial PLC Backplane
Use Scenario: Interfacing 3.3-V microcontroller peripherals to legacy 5-V PCI slots in embedded test equipment. IC Role / Device Role / Timing Role: Level-translating octal buffer isolating CPU address/data bus from 5-V PCI signaling domain. Use Value: Eliminates need for eight discrete level shifters; t_PLH/t_PHL ≤ 3.5 ns meets PCI 2.2 setup/hold timing margins.	Use Scenario: Hot-swappable I/O module in programmable logic controller rack with live backplane power. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling safe insertion/removal of field I/O cards without system shutdown. Use Value: I_off and power-up 3-state prevent bus contention and backfeed damage during card exchange.
Memory Expansion Subsystem	Automotive Diagnostic Gateway
Use Scenario: Expanding SRAM capacity in automotive infotainment head unit using 5-V memory chips with 3.3-V SoC. IC Role / Device Role / Timing Role: Noninverting buffer driving address and data lines between SoC and external memory array. Use Value: 64-mA I_OL sustains signal integrity across 8-cm PCB traces; −40°C to 85°C rating matches vehicle cabin environment.	Use Scenario: Isolating CAN transceiver logic-level signals from 3.3-V MCU in OBD-II diagnostic tool. IC Role / Device Role / Timing Role: Signal conditioning buffer between MCU GPIO and CAN controller interface pins. Use Value: 5.5-V input tolerance accommodates CAN transceiver V_IH overshoot; 2000-V HBM ESD withstands workshop ESD events.

PCI Bus Interface

Industrial PLC Backplane

Use Scenario: Interfacing 3.3-V microcontroller peripherals to legacy 5-V PCI slots in embedded test equipment.

IC Role / Device Role / Timing Role: Level-translating octal buffer isolating CPU address/data bus from 5-V PCI signaling domain.

Use Value: Eliminates need for eight discrete level shifters; t_PLH/t_PHL ≤ 3.5 ns meets PCI 2.2 setup/hold timing margins.

Use Scenario: Hot-swappable I/O module in programmable logic controller rack with live backplane power.

IC Role / Device Role / Timing Role: Bidirectional bus driver enabling safe insertion/removal of field I/O cards without system shutdown.

Use Value: I_off and power-up 3-state prevent bus contention and backfeed damage during card exchange.

Memory Expansion Subsystem

Automotive Diagnostic Gateway

Use Scenario: Expanding SRAM capacity in automotive infotainment head unit using 5-V memory chips with 3.3-V SoC.

IC Role / Device Role / Timing Role: Noninverting buffer driving address and data lines between SoC and external memory array.

Use Value: 64-mA I_OL sustains signal integrity across 8-cm PCB traces; −40°C to 85°C rating matches vehicle cabin environment.

Use Scenario: Isolating CAN transceiver logic-level signals from 3.3-V MCU in OBD-II diagnostic tool.

IC Role / Device Role / Timing Role: Signal conditioning buffer between MCU GPIO and CAN controller interface pins.

Use Value: 5.5-V input tolerance accommodates CAN transceiver V_IH overshoot; 2000-V HBM ESD withstands workshop ESD events.

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), 1.65–3.6 V V_CC, no I_off or hot-insertion support	Suitable only for static 3.3-V-only systems; not rated for 5-V mixed-mode or hot-swap	Select when cost is primary and hot-swap/mixed-voltage operation is unnecessary
SN74ALVC244PW	Higher speed (t_PLH/t_PHL ≤ 2.8 ns), same V_CC range, but lacks I_off and has lower ESD rating (1500-V HBM)	Preferred for high-speed 3.3-V-only buses where thermal performance is less critical than propagation delay	Choose when sub-3-ns timing is mandatory and hot-insertion is not required

Compared with SN74LVC244APWR and SN74ALVC244PW, the SN74LVT244BRGYR uniquely combines 5-V-tolerant inputs, hot-insertion capability, and industry-leading thermal resistance-making it the only option among the three qualified for mixed-voltage backplane and live-module replacement applications.

Availability

SN74LVT244BRGYR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive diagnostic gateways, memory expansion subsystems, and PCI bus interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVT244BRGYR 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, embedded processing, and connectivity solutions with focus on reliability, longevity, and industrial-grade qualification.

The SN74LVT244BRGYR belongs to TI's ABT logic family, engineered specifically for robust mixed-voltage bus interfacing in industrial automation, telecom infrastructure, and automotive electronics where signal integrity and hot-swap resilience are critical.

FAQ

What is the maximum input voltage the SN74LVT244BRGYR can tolerate?

The SN74LVT244BRGYR accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct connection to 5-V logic sources without external clamping or level translation. This 5-V tolerance is explicitly specified in the absolute maximum ratings and electrical characteristics tables of the official TI datasheet SCAS354J.

Does the SN74LVT244BRGYR support hot insertion, and how is it implemented?

Yes, the SN74LVT244BRGYR supports hot insertion via integrated I_off circuitry and power-up 3-state logic. When V_CC = 0, I_off limits current flow to ±100 μA, preventing backfeed. During power-up, outputs remain in high-impedance until V_CC stabilizes-both features are confirmed in the device description and functional table of the SN74LVT244B datasheet.

What is the thermal resistance (θ_JA) of the SN74LVT244BRGYR package?

The SN74LVT244BRGYR in the RGY (VQFN-20) package has a junction-to-ambient thermal resistance of 37°C/W, measured per JESD 51-5. This value is documented in the "Absolute Maximum Ratings" table of the SCAS354J datasheet and is significantly lower than SOIC (58°C/W) or TSSOP (83°C/W) variants, enabling higher power density layouts.

Can the SN74LVT244BRGYR be used with a 2.7-V supply, and what performance trade-offs occur?

Yes, the SN74LVT244BRGYR is fully specified down to 2.7 V V_CC. At this minimum voltage, VOL increases to 0.5 V (I_OL = 24 mA) and propagation delay rises to 3.8 ns (t_PLH/t_PHL), per the "Recommended Operating Conditions" and "Switching Characteristics" tables in SCAS354J-still sufficient for ≤25-MHz bus operation.

How are the output-enable (OE) pins configured on the SN74LVT244BRGYR, and what is the recommended power-up bias?

The SN74LVT244BRGYR has two active-low OE pins (1OE and 2OE), one per 4-bit buffer group. To ensure high-impedance state during power-up, TI recommends tying each OE to V_CC through a pullup resistor; minimum value depends on driver sink capability and is detailed in the "Description" section of the SN74LVT244B datasheet.

SN74LVT244BRGYR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

Package/Case:: 20-VFQFN Exposed Pad

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-VQFN (3.5x4.5)

SN74LVT244BRGYR FAQ

1.How can I place an order for SN74LVT244BRGYR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT244BRGYR 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 SN74LVT244BRGYR reliable?

The price and inventory of SN74LVT244BRGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244BRGYR is usually 5 days.

3.What payment methods are accepted for SN74LVT244BRGYR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT244BRGYR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVT244BRGYR?

SN74LVT244BRGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT244BRGYR 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 SN74LVT244BRGYR?

For technical support, including SN74LVT244BRGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244BRGYR requirements.

6.How does Aetrix verify that SN74LVT244BRGYR is sourced from the original manufacturer or authorized distributors?

All SN74LVT244BRGYR 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 SN74LVT244BRGYR meets industry standards.

7.What is the process for return or replacement of SN74LVT244BRGYR?

All SN74LVT244BRGYR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244BRGYR, 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 SN74LVT244BRGYR part is unused and in its original packaging.

Return procedure for SN74LVT244BRGYR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…