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

Texas Instruments SN74LVT244BZQNR

Name: SN74LVT244BZQNR
Brand: Texas Instruments
SKU: SN74LVT244BZQNR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT244BZQNR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-VFBGA

Datasheet:: SN74LVT244BZQNR.pdf

Description:: IC BUFFER NON-INVERT 3.6V 20BGA

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Product details

Overview

SN74LVT244BZQNR 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, operates down to 2.7 V, and delivers t_PLH/t_PHL ≤ 3.5 ns at V_CC = 3.3 V - used in backplane interface and voltage-level translation in telecom line cards.

For engineers reviewing the SN74LVT244BZQNR datasheet, SN74LVT244BZQNR pinout, SN74LVT244BZQNR application, or SN74LVT244BZQNR equivalent, key selection criteria include 3.3-V supply compatibility with 5-V tolerant inputs, hot-swap support, low ground bounce (<0.8 V), and VFBGA ZQN package thermal performance (θ_JA = 78°C/W).

Technical Context

The SN74LVT244BZQNR implements Advanced BiCMOS Technology (ABT) logic with TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2 V) and 5-V tolerant inputs up to 5.5 V while powered from 2.7–3.6 V. Its dual 4-bit architecture allows independent control of two groups (1A→1Y and 2A→2Y) via separate OE pins (1OE and 2OE).

It integrates I_off circuitry to disable outputs during power-down, preventing backflow current, and power-up 3-state logic that forces high-impedance on outputs during V_CC ramp-up. Absolute maximum ratings include −0.5 V to 4.6 V on V_CC, and −0.5 V to 7 V on inputs/outputs in high-Z state.

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 rail conditions.
I_OL / I_OH	64 mA / −32 mA - drives heavy capacitive loads (e.g., 50-pF bus traces) without signal degradation.
t_PLH/t_PHL	≤3.5 ns at V_CC = 3.3 V - supports >200-MHz data rates in point-to-point or stub-bus topologies.
V_IK	−1.2 V - ensures robust negative transient immunity on inputs during system noise events.
θ_JA	78°C/W (ZQN package) - defines thermal derating limit for continuous 64-mA output switching in compact PCB layouts.
V_OHP / V_OLP	<0.8 V typical ground bounce - minimizes simultaneous switching noise in dense memory or FPGA I/O banks.
I_off	±100 μA at V_CC = 0 - prevents damaging backfeed current during live board insertion into powered backplanes.

Pinout & Package

VFBGA package (ZQN), 20-pin, 3.5 mm × 4.5 mm, 0.5 mm pitch, exposed thermal pad (Pin 21), 1.0 mm max height. RoHS-compliant, NiPdAu lead finish, MSL Level-3 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Independent control of Group 1 (1A1–1A4 → 1Y1–1Y4) and Group 2 (2A1–2A4 → 2Y1–2Y4); tie to V_CC via pullup for safe power-up state.
1A1–1A4, 2A1–2A4	Data inputs	TTL-compatible inputs accepting 0–5.5 V; no level-shifting required when interfacing 5-V microcontrollers to 3.3-V FPGAs.
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive bidirectional buses; high-Z state active when OE = high, eliminating contention in shared-data-path systems.
V_CC	Supply	3.3-V core logic supply; supports down to 2.7 V for brownout resilience in portable equipment.
GND	Ground reference	Common return for all I/O and internal logic; requires low-inductance connection to minimize ground bounce.
NC (Pin 21)	Thermal pad	Exposed copper pad for solder attachment - mandatory for thermal dissipation and mechanical stability in ZQN package.

Key Features

Feature	Design Value
Mixed-mode 5-V input / 3.3-V V_CC operation	Eliminates external level shifters when connecting legacy 5-V peripherals to modern 3.3-V SoCs or FPGAs.
I_off and power-up 3-state	Enables hot-plug capability in modular telecom or industrial backplanes without risk of bus contention or latch-up.
Output ground bounce <0.8 V	Reduces timing jitter and bit errors in high-speed parallel interfaces (e.g., address/data buses driving multiple loads).
Latch-up immunity >100 mA (JESD 78 Class II)	Ensures robustness against ESD-induced latch-up in harsh industrial environments with frequent cable hot-swapping.
ESD protection: 2000-V HBM, 200-V MM, 1000-V CDM	Meets IEC 61000-4-2 Level 4 requirements for system-level ESD immunity without added TVS diodes.

Applications

Backplane Interface	FPGA I/O Expansion
Use Scenario: Driving parallel control/address lines across a 12-slot telecom shelf with varying slot power sequencing. IC Role / Device Role / Timing Role: Octal buffer isolating FPGA-side 3.3-V logic from backplane's 5-V signaling domain while maintaining timing integrity. Use Value: Dual OE control allows staggered enable per slot, reducing inrush current and avoiding simultaneous switching noise across the entire backplane.	Use Scenario: Expanding I/O count of a Xilinx Artix-7 FPGA by interfacing external ADCs, DACs, and memory with mismatched voltage domains. IC Role / Device Role / Timing Role: Voltage-translating buffer providing 5-V tolerant inputs and 3.3-V compatible outputs synchronized to FPGA clock domain. Use Value: Sub-4 ns propagation delay preserves setup/hold margins for 100-MHz parallel ADC interfaces without requiring additional timing closure effort.
Industrial PLC Module	Test Equipment Signal Routing
Use Scenario: Isolating field I/O signals (24-V digital inputs) conditioned through optocouplers before feeding into a 3.3-V microcontroller. IC Role / Device Role / Timing Role: Input buffer stage converting opto-output logic levels to clean 3.3-V CMOS-compatible signals with noise margin. Use Value: High noise immunity (V_IL = 0.8 V, V_IH = 2 V) rejects common-mode transients induced by motor drives or solenoid switching.	Use Scenario: Multiplexing stimulus signals from multiple AWG channels to DUT pins in automated test equipment with strict channel isolation. IC Role / Device Role / Timing Role: 3-state driver enabling dynamic reconfiguration of signal paths without physical relay switching. Use Value: I_off protection prevents backfeed from powered DUTs into unpowered AWG channels during reconfiguration sequences.

Backplane Interface

FPGA I/O Expansion

Use Scenario: Driving parallel control/address lines across a 12-slot telecom shelf with varying slot power sequencing.

IC Role / Device Role / Timing Role: Octal buffer isolating FPGA-side 3.3-V logic from backplane's 5-V signaling domain while maintaining timing integrity.

Use Value: Dual OE control allows staggered enable per slot, reducing inrush current and avoiding simultaneous switching noise across the entire backplane.

Use Scenario: Expanding I/O count of a Xilinx Artix-7 FPGA by interfacing external ADCs, DACs, and memory with mismatched voltage domains.

IC Role / Device Role / Timing Role: Voltage-translating buffer providing 5-V tolerant inputs and 3.3-V compatible outputs synchronized to FPGA clock domain.

Use Value: Sub-4 ns propagation delay preserves setup/hold margins for 100-MHz parallel ADC interfaces without requiring additional timing closure effort.

Industrial PLC Module

Test Equipment Signal Routing

Use Scenario: Isolating field I/O signals (24-V digital inputs) conditioned through optocouplers before feeding into a 3.3-V microcontroller.

IC Role / Device Role / Timing Role: Input buffer stage converting opto-output logic levels to clean 3.3-V CMOS-compatible signals with noise margin.

Use Value: High noise immunity (V_IL = 0.8 V, V_IH = 2 V) rejects common-mode transients induced by motor drives or solenoid switching.

Use Scenario: Multiplexing stimulus signals from multiple AWG channels to DUT pins in automated test equipment with strict channel isolation.

IC Role / Device Role / Timing Role: 3-state driver enabling dynamic reconfiguration of signal paths without physical relay switching.

Use Value: I_off protection prevents backfeed from powered DUTs into unpowered AWG channels during reconfiguration sequences.

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 5-V tolerant inputs (max VI = 3.6 V), LVC logic family.	Suitable only for pure 3.3-V systems; cannot replace SN74LVT244BZQNR in mixed-voltage backplane designs.	Select when cost and power efficiency outweigh mixed-voltage interface needs.
74ALVC244PW	Same 24-mA drive, 3.6-V max input, but faster t_PD (2.3 ns typ), ALVC family with lower ICC.	Lacks I_off and hot-swap support; unsuitable for live-insertion applications like modular test systems.	Prefer for high-speed, low-power 3.3-V-only routing where thermal headroom is constrained.

Compared with SN74LVC244APWR and 74ALVC244PW, the SN74LVT244BZQNR uniquely combines 5-V input tolerance, hot-swap readiness, and 64-mA drive - making it irreplaceable in telecom backplanes and industrial hot-plug modules where voltage interoperability and system availability are critical.

Availability

SN74LVT244BZQNR is available at Aetrix Electronics and suitable for backplane interface, FPGA I/O expansion, and industrial PLC module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74LVT244BZQNR 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 SN74LVT244BZQNR belongs to TI's ABT logic family, engineered for high-speed, mixed-voltage interface applications in telecom infrastructure, test equipment, and industrial control systems where reliability under hot-swap and wide supply range is essential.

FAQ

What is the maximum input voltage rating for SN74LVT244BZQNR?

The SN74LVT244BZQNR supports input voltages up to 5.5 V regardless of V_CC level, enabling direct interfacing with 5-V TTL or CMOS sources while operating from a 3.3-V supply. This 5-V tolerance is guaranteed across the full operating temperature range (−40°C to 85°C) and does not require external clamping circuitry.

Does SN74LVT244BZQNR support hot insertion, and how is it implemented?

Yes, SN74LVT244BZQNR supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0, blocking backflow current, and power-up 3-state forces outputs into high-impedance during V_CC ramp-up. These functions are inherent to the ABT process and require no external components to ensure safe live-board insertion into powered systems.

What is the thermal resistance (θ_JA) of the ZQN package used in SN74LVT244BZQNR?

The SN74LVT244BZQNR in VFBGA ZQN package has a specified junction-to-ambient thermal resistance (θ_JA) of 78°C/W under JEDEC JESD51-7 conditions. This value assumes standard 2-layer PCB layout with 1-in² copper pour connected to the exposed thermal pad; actual performance improves with enhanced thermal vias and multilayer heatsinking.

Can SN74LVT244BZQNR operate below 3.3 V, and what is the minimum functional supply voltage?

Yes, SN74LVT244BZQNR is fully specified down to 2.7 V V_CC, supporting unregulated battery operation and brownout resilience. At 2.7 V, it maintains guaranteed VOL ≤ 0.5 V at I_OL = 24 mA and t_PLH/t_PHL ≤ 3.8 ns, ensuring reliable timing in portable or energy-harvesting systems.

How are the output-enable (OE) pins configured on SN74LVT244BZQNR, and what is their logic polarity?

The SN74LVT244BZQNR has two active-low output-enable pins: Pin 1 (1OE) controls outputs 1Y1–1Y4, and Pin 19 (2OE) controls outputs 2Y1–2Y4. When OE is low, data passes from A inputs to Y outputs; when OE is high, outputs enter high-impedance state. Pull-up resistors to V_CC are recommended to ensure defined state during power-up.

SN74LVT244BZQNR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

Package/Case:: 20-VFBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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-BGA MICROSTAR JUNIOR (4x3)

SN74LVT244BZQNR FAQ

1.How can I place an order for SN74LVT244BZQNR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT244BZQNR 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 SN74LVT244BZQNR reliable?

The price and inventory of SN74LVT244BZQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244BZQNR is usually 5 days.

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Once your SN74LVT244BZQNR 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 SN74LVT244BZQNR?

For technical support, including SN74LVT244BZQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244BZQNR requirements.

6.How does Aetrix verify that SN74LVT244BZQNR is sourced from the original manufacturer or authorized distributors?

All SN74LVT244BZQNR 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 SN74LVT244BZQNR meets industry standards.

7.What is the process for return or replacement of SN74LVT244BZQNR?

All SN74LVT244BZQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244BZQNR, 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 SN74LVT244BZQNR part is unused and in its original packaging.

Return procedure for SN74LVT244BZQNR:

1.Submit a request within 90 days.

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

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