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

NXP Semiconductors 74LVT244AD,112

Name: 74LVT244AD,112
Brand: NXP Semiconductors
SKU: 74LVT244AD,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT244AD,112

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 74LVT244AD,112.pdf

Description:: IC BUFF/DVR TRI-ST DUAL 20SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:13,170

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Product details

Overview

74LVT244AD,112 from Nexperia is a 3.3 V octal 3-state buffer/line driver in SO20 package, featuring dual independent 4-bit channels with active-low output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, bus hold inputs eliminating external pull-ups, and 5.5 V-tolerant inputs for mixed-voltage interfacing in backplane or motherboard data routing applications.

For engineers reviewing the 74LVT244AD,112 datasheet, 74LVT244AD,112 pinout, 74LVT244AD,112 application, or 74LVT244AD,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), overvoltage tolerance (VI ≤ 5.5 V), supply range (2.7–3.6 V), bus hold current (IBHL = 75–150 μA), and thermal performance (Tj ≤ 150 °C) in industrial-grade SO20 packaging.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low enable (1OE for Y0–Y3 group, 2OE for Y0–Y3 group), supporting flexible bus segmentation. Its IOFF circuitry ensures partial power-down operation with leakage < ±100 μA when VCC = 0 V.

Input clamping (VIK = −1.2 V) and overvoltage tolerance (VI up to 5.5 V) allow safe interfacing with 5 V TTL logic while operating at 3.3 V supply. Propagation delays are tightly specified: tPLH/tPHL ≤ 4.1 ns at VCC = 3.6 V, and 3-state enable/disable times (tPZH/tPLZ) ≤ 5.6 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7 V to 3.6 V - Enables stable operation across wide industrial rail tolerances without regulation.
Output Drive	+64 mA sink / −32 mA source - Supports heavy capacitive loads and fan-out to multiple CMOS/TTL inputs.
Input Voltage Range	−0.5 V to +5.5 V - Allows direct connection to 5 V buses without level shifters or protection diodes.
Propagation Delay	tPLH/tPHL ≤ 4.1 ns @ VCC = 3.6 V - Ensures sub-5 ns signal integrity in high-speed parallel data paths.
Bus Hold Current	IBHL = 75–150 μA @ VI = 0.8 V - Maintains defined logic state on unused inputs, removing need for external pull-up resistors.
3-State Enable Time	tPZH ≤ 5.6 ns @ VCC = 3.6 V - Minimizes bus contention window during hot-swap or dynamic bus arbitration.
Operating Temperature	−40 °C to +85 °C - Qualified for extended industrial ambient environments without derating.
ESD Protection	HBM > 2000 V, CDM > 1000 V - Robust handling during PCB assembly and system integration.

Pinout & Package

74LVT244AD,112 uses the SOT163-1 (SO20) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-013 compliant. Pin 1 index located at top-left corner with notch marking.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1OE, 2OE	Active-low output enable controls four outputs each; HIGH forces high-impedance OFF-state.
2, 4, 6, 8	1A0–1A3	Data inputs for first 4-bit buffer channel; bus hold enabled by default.
11, 13, 15, 17	2A0–2A3	Data inputs for second 4-bit buffer channel; independent of first channel.
12, 14, 16, 18	1Y0–1Y3	Non-inverting outputs for first channel; driven only when 1OE = LOW.
3, 5, 7, 9	2Y0–2Y3	Non-inverting outputs for second channel; driven only when 2OE = LOW.
10	GND	Ground reference (0 V); required for all internal biasing and ESD structures.
20	VCC	3.3 V supply input; decoupling capacitor recommended within 10 mm of pin.

Key Features

Feature	Design Value
Octal 3-state buffering	Two independent 4-bit groups enable selective bus isolation without external gating logic.
Overvoltage-tolerant inputs	Withstands up to 5.5 V regardless of VCC, enabling plug-and-play compatibility with legacy 5 V systems.
Integrated bus hold	Eliminates external pull-up resistors on unused inputs, reducing BOM count and board space.
IOFF partial power-down	Leakage < ±100 μA when VCC = 0 V allows safe live insertion/extraction without damaging backplane.
BiCMOS process	Combines bipolar speed (sub-5 ns propagation) with CMOS low static power (< 0.19 mA ICC).
JEDEC JESD8C compliance	Fully conforms to 2.7–3.6 V supply standard, ensuring interoperability across 3.3 V logic families.

Applications

Backplane Data Routing

Industrial I/O Expansion

Use Scenario: Isolating and driving parallel address/data lines between CPU module and peripheral cards in modular PLC chassis.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing bidirectional signal conditioning and bus contention control via OE pins.

Use Value: 5.5 V-tolerant inputs interface directly with legacy 5 V card logic; tPZH ≤ 5.6 ns prevents metastability during hot-swap transitions.

Use Scenario: Level-shifting and fan-out expansion of microcontroller GPIOs to drive multiple relay drivers and sensor interfaces.

IC Role / Device Role / Timing Role: Octal line driver with bus hold maintaining defined states on unconnected MCU pins during firmware updates.

Use Value: IBHL = 75–150 μA eliminates need for 8 external pull-ups; ±64 mA sink supports direct relay coil drive without discrete transistors.

Memory Subsystem Interface

Test Equipment Signal Conditioning

Use Scenario: Buffering control signals (WE, OE, CE) between FPGA memory controller and multiple SRAM chips on shared bus.

IC Role / Device Role / Timing Role: Low-skew 3-state driver synchronizing enable timing across memory bank selects.

Use Value: tPLH/tPHL ≤ 4.1 ns ensures setup/hold margin for 100 MHz SRAM access; VCC = 3.3 V matches FPGA I/O voltage.

Use Scenario: Driving calibrated test vectors into DUT inputs while isolating pattern generator outputs from variable load capacitance.

IC Role / Device Role / Timing Role: Precision 3-state buffer with known propagation delay and output impedance for repeatable timing calibration.

Use Value: Specified tPZH/tPLZ (≤ 5.6 ns) enables accurate delay compensation; ±32 mA sourcing drives 50 Ω coaxial loads directly.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVT244APW,118	TSSOP20 package (4.4 mm width); 0.65 mm pitch; lower profile (1.0 mm max height)	Better suited for space-constrained PCBs; thermal resistance higher than SO20 (RθJA ≈ 120 K/W vs 90 K/W)	Select for high-density layouts where footprint area is critical and thermal load is moderate.
SN74LVC244APWR	TI part; 1.65–3.6 V supply; lower drive (±24 mA); no bus hold; different pinout (1OE/2OE on pins 1/19 same, but I/O mapping differs)	Requires external pull-ups; not drop-in compatible due to pin assignment mismatch and reduced drive strength	Use only after full schematic and layout revision; verify timing margins with tPLH = 5.2 ns (max) at 3.3 V.

Compared with 74LVT244AD,112, the TSSOP variant trades thermal performance for compactness, while the TI LVC244 requires redesign for bus hold removal and pinout rework-neither offers identical electrical or mechanical interchangeability without validation.

Availability

74LVT244AD,112 is available at Aetrix Electronics and suitable for industrial backplane routing, PLC I/O expansion, memory subsystem interfacing, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT244AD,112 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

Nexperia is a global semiconductor expert delivering high-performance, reliable logic, analog, and MOSFET solutions optimized for efficiency, miniaturization, and robustness in industrial and consumer applications.

The 74LVT series targets high-speed 3.3 V digital interfacing with emphasis on bus integrity, mixed-voltage compatibility, and ruggedness in harsh environments-designed specifically for backplane, control, and instrumentation systems.

FAQ

What is the maximum input voltage the 74LVT244AD,112 can tolerate?

The device accepts input voltages from −0.5 V to +5.5 V regardless of VCC level, enabling direct connection to 5 V logic without level shifters. This overvoltage tolerance is guaranteed per datasheet Table 4 and applies to all data and control pins (1OE, 2OE, A0–A3, Y0–Y3), with clamping current limited to −50 mA.

Does the 74LVT244AD,112 require external pull-up resistors on unused inputs?

No. The device integrates bus hold circuitry on all data inputs (1A0–1A3, 2A0–2A3), providing 75–150 μA holding current at VI = 0.8 V or 2.0 V. This maintains defined logic states without external components, reducing BOM cost and PCB area while improving noise immunity.

Can the 74LVT244AD,112 be used in hot-swap applications?

Yes. Its IOFF circuitry limits power-off leakage to ±100 μA when VCC = 0 V, and live insertion/extraction is explicitly permitted per datasheet Section 2. This allows safe replacement of modules in powered-backplane systems without disrupting adjacent slots or causing latch-up.

What is the typical propagation delay for the 74LVT244AD,112 at 3.3 V?

At VCC = 3.3 V and Tamb = 25 °C, typical propagation delay (tPLH/tPHL) is 2.5 ns, with maximum 4.1 ns across −40 °C to +85 °C. This value is measured from input transition (10%–90%) to output crossing VM = 1.5 V under 50 pF load and 500 Ω termination, per Figure 3 and Table 7.

74LVT244AD,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

74LVT244AD,112 FAQ

1.How can I place an order for 74LVT244AD,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT244AD,112 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 74LVT244AD,112 reliable?

The price and inventory of 74LVT244AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT244AD,112 is usually 5 days.

3.What payment methods are accepted for 74LVT244AD,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT244AD,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT244AD,112?

74LVT244AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT244AD,112 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 74LVT244AD,112?

For technical support, including 74LVT244AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT244AD,112 requirements.

6.How does Aetrix verify that 74LVT244AD,112 is sourced from the original manufacturer or authorized distributors?

All 74LVT244AD,112 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 74LVT244AD,112 meets industry standards.

7.What is the process for return or replacement of 74LVT244AD,112?

All 74LVT244AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT244AD,112, 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 74LVT244AD,112 part is unused and in its original packaging.

Return procedure for 74LVT244AD,112:

1.Submit a request within 90 days.

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

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