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

Texas Instruments SN74LVT244BPWRE4

Name: SN74LVT244BPWRE4
Brand: Texas Instruments
SKU: SN74LVT244BPWRE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT244BPWRE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVT244BPWRE4.pdf

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

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Product details

Overview

SN74LVT244BPWRE4 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 and power-up 3-state for hot insertion, ±100 µA I_off at V_CC = 0 V, and supports unregulated battery operation down to 2.7 V. It is used in backplane interface logic and voltage-level translation in industrial control systems.

For engineers reviewing the SN74LVT244BPWRE4 datasheet, SN74LVT244BPWRE4 pinout, SN74LVT244BPWRE4 application, or SN74LVT244BPWRE4 equivalent, key selection criteria include 3-state enable timing (t_PZH/t_PZL ≤ 5.3 ns), output drive capability (I_OL = 64 mA), hot-insertion support via I_off, and TSSOP-20 package compatibility with space-constrained PCB layouts.

Technical Context

The SN74LVT244BPWRE4 implements Advanced BiCMOS Technology (ABT) logic with TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2 V) and 3.3-V supply operation. Its dual 4-bit architecture uses separate 1OE and 2OE controls, enabling independent channel gating without bus contention.

It integrates power-up 3-state circuitry that forces outputs into high-impedance during V_CC ramp-up/down, and I_off protection that disables outputs when V_CC = 0 V-preventing backflow current up to ±100 µA. 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 - enables direct use with unregulated Li-ion or 3.3-V SMPS rails
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	1.1–3.5 ns @ V_CC = 3.3 V - supports >200-MHz data rates in point-to-point routing
I_off	±100 µA @ V_CC = 0 V - prevents damaging backfeed during live board insertion
V_OLP	<0.8 V @ V_CC = 3.3 V - ensures noise margin against ground bounce in dense digital systems
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM - meets industrial IEC 61000-4-2 system-level robustness requirements
θ_JA	83°C/W (PW package) - defines thermal derating for continuous 64-mA output loading at 85°C ambient

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, 0.65 mm pitch, exposed thermal pad optional per design; RoHS-compliant NiPdAu lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Independent gating of Channel A (pins 1A1–1A4 → 1Y1–1Y4) and Channel B (2A1–2A4 → 2Y1–2Y4)
1A1–1A4, 2A1–2A4	Data inputs	TTL-compatible inputs accept 0–5.5 V; no level-shifting required for 5-V source interfaces
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Drive 3.3-V buses; high-impedance state eliminates contention during multiplexed access
V_CC (Pin 10)	Power supply	3.3-V core rail only; must be decoupled locally with 0.1-µF ceramic capacitor
GND (Pin 11)	Ground reference	Common return for all I/O and supply; requires low-inductance connection to PCB ground plane

Key Features

Feature	Design Value
Mixed-mode 5-V/3.3-V interface	Accepts 5-V TTL inputs while operating at 3.3-V V_CC, eliminating external level shifters in legacy-to-modern system interconnects
Hot-insertion support	I_off and power-up 3-state prevent current backflow and bus conflicts during live card replacement in telecom and server backplanes
Low ground bounce (V_OLP)	<0.8 V at 3.3 V ensures reliable low-level signaling even under simultaneous 8-output switching
High ESD immunity	2000-V HBM rating allows handling without special ESD precautions in standard assembly environments
Latch-up immunity	Exceeds 100 mA per JESD 78 Class II - guarantees robust operation in noisy industrial power environments

Applications

Backplane Data Routing	Industrial PLC I/O Expansion
Use Scenario: Isolating and buffering address/data lines between CPU module and peripheral slots in modular automation chassis. IC Role / Device Role / Timing Role: Octal 3-state buffer providing direction-controlled, contention-free bus access across hot-swappable slots. Use Value: Enables deterministic timing (t_PHL ≤ 3.3 ns) and eliminates need for discrete bus switches or FPGA glue logic.	Use Scenario: Translating 5-V sensor/actuator signals to 3.3-V microcontroller inputs in programmable logic controller rack modules. IC Role / Device Role / Timing Role: Level-translating buffer with TTL-compatible inputs and 3.3-V CMOS outputs, supporting mixed-voltage I/O expansion. Use Value: Eliminates external voltage translators while maintaining noise margin (V_IL = 0.8 V, V_IH = 2 V) across temperature range.
Test Equipment Signal Conditioning	Communications Baseband Interface
Use Scenario: Driving multiple parallel test points from a single FPGA GPIO bank in automated test equipment (ATE) fixtures. IC Role / Device Role / Timing Role: Output driver with high sink current (64 mA) and fast enable/disable (t_PZL ≤ 4.9 ns) for precise stimulus timing. Use Value: Reduces fixture wiring complexity and improves signal integrity by minimizing stub lengths on driven nets.	Use Scenario: Interfacing baseband processor GPIOs to RF transceiver control lines requiring 3.3-V logic levels and hot-plug resilience. IC Role / Device Role / Timing Role: Hot-insertion-capable buffer isolating control bus during module replacement in cellular infrastructure radios. Use Value: Prevents system reset or corruption during field-replaceable unit (FRU) swaps via I_off and power-up 3-state behavior.

Backplane Data Routing

Industrial PLC I/O Expansion

Use Scenario: Isolating and buffering address/data lines between CPU module and peripheral slots in modular automation chassis.

IC Role / Device Role / Timing Role: Octal 3-state buffer providing direction-controlled, contention-free bus access across hot-swappable slots.

Use Value: Enables deterministic timing (t_PHL ≤ 3.3 ns) and eliminates need for discrete bus switches or FPGA glue logic.

Use Scenario: Translating 5-V sensor/actuator signals to 3.3-V microcontroller inputs in programmable logic controller rack modules.

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

Use Value: Eliminates external voltage translators while maintaining noise margin (V_IL = 0.8 V, V_IH = 2 V) across temperature range.

Test Equipment Signal Conditioning

Communications Baseband Interface

Use Scenario: Driving multiple parallel test points from a single FPGA GPIO bank in automated test equipment (ATE) fixtures.

IC Role / Device Role / Timing Role: Output driver with high sink current (64 mA) and fast enable/disable (t_PZL ≤ 4.9 ns) for precise stimulus timing.

Use Value: Reduces fixture wiring complexity and improves signal integrity by minimizing stub lengths on driven nets.

Use Scenario: Interfacing baseband processor GPIOs to RF transceiver control lines requiring 3.3-V logic levels and hot-plug resilience.

IC Role / Device Role / Timing Role: Hot-insertion-capable buffer isolating control bus during module replacement in cellular infrastructure radios.

Use Value: Prevents system reset or corruption during field-replaceable unit (FRU) swaps via I_off and power-up 3-state behavior.

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 range	Suitable for low-power, non-hot-swap designs; lacks bus isolation during power-off	Select when cost and static power are prioritized over hot-insertion and high-drive capability
74ALVC244MTCX	Higher speed (t_PD = 2.5 ns typ), same I_OL = 24 mA, no I_off, -40°C to 125°C	Better for extended temperature automotive or aerospace use, but no hot-swap support	Select for high-reliability extended-temp applications where I_off is not required

Compared with SN74LVC244APWR and 74ALVC244MTCX, the SN74LVT244BPWRE4 uniquely combines 64-mA drive, I_off-enabled hot insertion, and 5-V-tolerant inputs-making it irreplaceable in industrial backplane and live-replaceable module designs.

Availability

SN74LVT244BPWRE4 is available at Aetrix Electronics and suitable for industrial control systems, telecommunications backplanes, and test equipment requiring stable component supply with long-term lifecycle support.

Supply support for SN74LVT244BPWRE4 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 industrial-grade logic and interface solutions.

The SN74LVT244BPWRE4 belongs to TI's ABT logic family, engineered for high-speed, mixed-voltage system interfacing in mission-critical infrastructure where reliability, hot-swap capability, and noise immunity are mandatory.

FAQ

What is the maximum recommended operating temperature for the SN74LVT244BPWRE4?

The SN74LVT244BPWRE4 is rated for operation from −40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 latch-up testing and thermal characterization (θ_JA = 83°C/W for PW package). Operation beyond 85°C requires derating based on actual power dissipation and board-level thermal design.

Does the SN74LVT244BPWRE4 support true 5-V tolerant inputs?

Yes, the SN74LVT244BPWRE4 accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct connection to 5-V TTL sources without external clamping or level-shifting. Input clamp current is specified at −50 mA, and absolute maximum VI is 7 V.

How does the I_off feature protect the SN74LVT244BPWRE4 during hot insertion?

The I_off circuitry in the SN74LVT244BPWRE4 disables all outputs when V_CC = 0 V, limiting current flow to ±100 µA even if 5-V signals are present on A or Y pins. This prevents damaging backfeed current into a powered-down system, satisfying hot-insertion safety requirements in telecom and server applications.

Can the SN74LVT244BPWRE4 be used with a 2.5-V supply?

No. The SN74LVT244BPWRE4 has a minimum V_CC of 2.7 V per recommended operating conditions. At 2.5 V, parameters including VOL, VOH, and t_PD are not guaranteed, and functionality may be unreliable. For 2.5-V systems, consider the SN74LVC244A instead.

What is the purpose of tying OE to V_CC through a pullup resistor?

Tying 1OE or 2OE to V_CC via a pullup resistor ensures the outputs remain in high-impedance during power-up or power-down transients. The minimum resistor value is determined by the driver's current-sinking capability-TI recommends ≥10 kΩ for typical applications to guarantee clean 3-state entry before V_CC stabilizes.

SN74LVT244BPWRE4 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

SN74LVT244BPWRE4 FAQ

1.How can I place an order for SN74LVT244BPWRE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT244BPWRE4 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 SN74LVT244BPWRE4 reliable?

The price and inventory of SN74LVT244BPWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244BPWRE4 is usually 5 days.

3.What payment methods are accepted for SN74LVT244BPWRE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT244BPWRE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVT244BPWRE4?

SN74LVT244BPWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT244BPWRE4 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 SN74LVT244BPWRE4?

For technical support, including SN74LVT244BPWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244BPWRE4 requirements.

6.How does Aetrix verify that SN74LVT244BPWRE4 is sourced from the original manufacturer or authorized distributors?

All SN74LVT244BPWRE4 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 SN74LVT244BPWRE4 meets industry standards.

7.What is the process for return or replacement of SN74LVT244BPWRE4?

All SN74LVT244BPWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244BPWRE4, 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 SN74LVT244BPWRE4 part is unused and in its original packaging.

Return procedure for SN74LVT244BPWRE4:

1.Submit a request within 90 days.

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

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