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

Texas Instruments SN74LVT244BPWRG4

Name: SN74LVT244BPWRG4
Brand: Texas Instruments
SKU: SN74LVT244BPWRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT244BPWRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVT244BPWRG4.pdf

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

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Product details

Overview

SN74LVT244BPWRG4 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 two independent 4-bit channels, I_off support for hot insertion, and operates down to 2.7 V. It is used in backplane interface logic, bus buffering, and level translation in telecom and industrial control systems.

For engineers reviewing the SN74LVT244BPWRG4 datasheet, SN74LVT244BPWRG4 pinout, SN74LVT244BPWRG4 application, or SN74LVT244BPWRG4 equivalent, key selection criteria include 3-state enable timing (t_PZH/t_PLZ ≤ 5.3 ns), output drive strength (I_OL = 64 mA), hot-insertion capability via I_off, and TSSOP-20 package compatibility with space-constrained PCB layouts.

Technical Context

The SN74LVT244BPWRG4 implements dual 4-bit noninverting buffers with separate 3-state output-enable (OE) controls per group. Each channel passes data from A inputs to Y outputs when its OE is low; outputs enter high-impedance state when OE is high. The device uses Advanced BiCMOS Technology (ABT) to achieve TTL-compatible input thresholds while operating at 3.3-V V_CC.

It supports unregulated battery operation down to 2.7 V and includes power-up 3-state circuitry to prevent bus contention during power sequencing. I_off protection disables outputs when V_CC = 0 V, blocking current backflow - critical for live insertion into powered backplanes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - enables direct use with Li-ion batteries and regulated 3.3-V rails without external LDO.
I_OL / I_OH	64 mA / −32 mA - drives standard TTL loads and multiple CMOS inputs without fanout limitation.
t_PLH/t_PHL	1.1–3.5 ns @ V_CC = 3.3 V - ensures sub-4 ns propagation delay for high-speed bus applications up to 100 MHz.
t_PZH/t_PLZ	1.1–5.3 ns @ V_CC = 3.3 V - guarantees fast 3-state disable/enable for dynamic bus sharing and multiplexing.
V_IL/V_IH	0.8 V / 2.0 V - accepts standard TTL logic levels while powered from 3.3 V, enabling seamless 5-V-to-3.3-V interfacing.
I_off	±100 μA @ V_CC = 0 - prevents damaging back-current during hot-swap events in modular systems.
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC standards for robustness in manufacturing and field environments.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Output-enable control inputs	Active-low enables for Group 1 (pins 2–5) and Group 2 (pins 18–15); tie to V_CC via pullup for power-up high-Z safety.
1A1–1A4, 2A1–2A4	Data inputs	Noninverting inputs for each buffer channel; accept 5-V tolerant signals with 3.3-V V_CC.
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive bidirectional buses; high-impedance state isolates downstream logic during disable.
V_CC (Pin 10)	Power supply	3.3-V nominal supply; supports down to 2.7 V for brownout tolerance in portable systems.
GND (Pin 11)	Ground reference	Common return path; decoupling capacitor required within 10 mm of pin for noise suppression.

Key Features

Feature	Design Value
Mixed-mode 5-V/3.3-V interface	Accepts 5-V TTL inputs while powered at 3.3 V - eliminates level-shifter ICs in legacy-to-modern system upgrades.
Hot-insertion support	I_off and power-up 3-state prevent bus conflicts and latch-up during live module replacement in telecom chassis.
Low ground bounce (V_OLP)	<0.8 V @ V_CC = 3.3 V - reduces switching noise coupling into analog sections and improves signal integrity on shared PCB planes.
Latch-up immunity	Exceeds 100 mA per JESD 78 Class II - ensures reliability in noisy industrial environments with EFT and surge transients.
Wide temperature range	−40°C to +85°C operation - qualified for deployment in outdoor base stations, factory automation, and transportation electronics.

Applications

Backplane Bus Buffering	Industrial PLC I/O Expansion
Use Scenario: Isolating and driving parallel address/data buses across multi-slot backplanes in telecom line cards. IC Role / Device Role / Timing Role: Noninverting octal buffer with dual OE control provides directionally agnostic bus extension and load isolation. Use Value: Enables 64-mA drive per output to meet setup/hold timing across 15-cm traces while maintaining 3.3-V core logic compatibility.	Use Scenario: Interfacing 5-V sensor modules and actuators to a 3.3-V microcontroller-based PLC mainboard. IC Role / Device Role / Timing Role: Level-translating buffer with TTL-compatible inputs and 3.3-V outputs handles mixed-voltage I/O expansion. Use Value: Eliminates discrete resistor-divider networks and saves board space versus dual-supply translators.
Hot-Swappable Module Interface	Test Equipment Signal Conditioning
Use Scenario: Enabling safe insertion/removal of daughterboards in powered rack-mounted test systems. IC Role / Device Role / Timing Role: 3-state driver with I_off protection prevents backfeeding and bus contention during hot-swap transitions. Use Value: Meets IEC 61000-4-2/4-4 compliance requirements without external protection circuitry.	Use Scenario: Driving high-capacitance relay matrices and DUT interface fixtures in automated test equipment. IC Role / Device Role / Timing Role: Low-propagation-delay buffer amplifies MCU GPIO signals to switch multiple relays simultaneously. Use Value: Sub-4 ns t_PLH/t_PHL ensures precise timing alignment across 8-channel relay banks.

Backplane Bus Buffering

Industrial PLC I/O Expansion

Use Scenario: Isolating and driving parallel address/data buses across multi-slot backplanes in telecom line cards.

IC Role / Device Role / Timing Role: Noninverting octal buffer with dual OE control provides directionally agnostic bus extension and load isolation.

Use Value: Enables 64-mA drive per output to meet setup/hold timing across 15-cm traces while maintaining 3.3-V core logic compatibility.

Use Scenario: Interfacing 5-V sensor modules and actuators to a 3.3-V microcontroller-based PLC mainboard.

IC Role / Device Role / Timing Role: Level-translating buffer with TTL-compatible inputs and 3.3-V outputs handles mixed-voltage I/O expansion.

Use Value: Eliminates discrete resistor-divider networks and saves board space versus dual-supply translators.

Hot-Swappable Module Interface

Test Equipment Signal Conditioning

Use Scenario: Enabling safe insertion/removal of daughterboards in powered rack-mounted test systems.

IC Role / Device Role / Timing Role: 3-state driver with I_off protection prevents backfeeding and bus contention during hot-swap transitions.

Use Value: Meets IEC 61000-4-2/4-4 compliance requirements without external protection circuitry.

Use Scenario: Driving high-capacitance relay matrices and DUT interface fixtures in automated test equipment.

IC Role / Device Role / Timing Role: Low-propagation-delay buffer amplifies MCU GPIO signals to switch multiple relays simultaneously.

Use Value: Sub-4 ns t_PLH/t_PHL ensures precise timing alignment across 8-channel relay banks.

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 (24 mA I_OL), no I_off, 1.65–3.6 V V_CC	Suitable only for low-noise, low-power systems without hot-swap requirement	Select when cost and static power are prioritized over bus robustness and live insertion.
SN74ALVC244PWR	Higher speed (t_PLH = 2.1 ns typ), same I_off, 1.65–3.6 V V_CC	Better for high-frequency clock distribution but lacks 5-V input tolerance	Choose when interfacing exclusively with 3.3-V sources and maximum timing margin is needed.

Compared with SN74LVT244BPWRG4, SN74LVC244APWR trades off hot-swap safety and 5-V input compatibility for lower cost and power, while SN74ALVC244PWR improves speed but removes mixed-voltage interface capability - making SN74LVT244BPWRG4 uniquely suited for legacy-system integration where both robustness and voltage translation are mandatory.

Availability

SN74LVT244BPWRG4 is available at Aetrix Electronics and suitable for industrial PLCs, telecom backplane interfaces, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for SN74LVT244BPWRG4 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 interface solutions.

The SN74LVT244BPWRG4 belongs to TI's ABT logic family, engineered for high-speed, mixed-voltage bus interfacing in mission-critical infrastructure where signal integrity, hot-swap resilience, and industrial temperature operation are essential.

FAQ

What is the recommended power-up sequence for SN74LVT244BPWRG4 to avoid bus contention?

TI specifies tying 1OE and 2OE to V_CC through ≥10-kΩ pullup resistors to ensure outputs remain in high-impedance state until system firmware asserts valid enable signals. This prevents conflict during power ramp-up, especially when interfacing with other drivers on shared buses. The SN74LVT244BPWRG4's built-in power-up 3-state circuitry enforces this behavior even if OE is floating.

Does SN74LVT244BPWRG4 support 5-V tolerant inputs when V_CC = 3.3 V?

Yes. The SN74LVT244BPWRG4 explicitly supports 5-V input voltages with 3.3-V V_CC, verified by absolute maximum rating VI = 7 V and functional VIH = 2.0 V. This allows direct connection to legacy 5-V logic without external level shifters - a core feature of the ABT architecture.

What is the thermal resistance (θ_JA) of SN74LVT244BPWRG4 in its TSSOP-20 package?

The SN74LVT244BPWRG4 in TSSOP-20 (PW) package has θ_JA = 83°C/W under JEDEC-standard conditions (1-layer 2-oz copper, 1-in² pad). This value assumes no thermal vias; adding 4–6 thermal vias under the exposed pad can reduce θ_JA by ~25%, critical for sustained 64-mA output loading.

Can SN74LVT244BPWRG4 be used in automotive applications?

No. The SN74LVT244BPWRG4 is rated for −40°C to +85°C industrial temperature range and lacks AEC-Q100 qualification, automotive-grade screening, or extended temperature support. For automotive use, TI recommends pin-compatible alternatives like SN74LVC244AQDRQ1 (AEC-Q100 Grade 2).

How does I_off protection work in SN74LVT244BPWRG4 during hot insertion?

I_off circuitry in the SN74LVT244BPWRG4 disables all outputs when V_CC = 0 V, limiting current flow to ±100 μA even if 5-V signals are present on Y pins. This prevents back-current from powered backplanes into unpowered modules - a requirement for NEBS GR-63-CORE compliant telecom hardware.

SN74LVT244BPWRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

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

Packaging:: Tape & Reel (TR)

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

SN74LVT244BPWRG4 FAQ

1.How can I place an order for SN74LVT244BPWRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT244BPWRG4 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 SN74LVT244BPWRG4 reliable?

The price and inventory of SN74LVT244BPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244BPWRG4 is usually 5 days.

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4.How is shipping managed for SN74LVT244BPWRG4?

SN74LVT244BPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT244BPWRG4 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 SN74LVT244BPWRG4?

For technical support, including SN74LVT244BPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244BPWRG4 requirements.

6.How does Aetrix verify that SN74LVT244BPWRG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVT244BPWRG4 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 SN74LVT244BPWRG4 meets industry standards.

7.What is the process for return or replacement of SN74LVT244BPWRG4?

All SN74LVT244BPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244BPWRG4, 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 SN74LVT244BPWRG4 part is unused and in its original packaging.

Return procedure for SN74LVT244BPWRG4:

1.Submit a request within 90 days.

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

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