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

NXP Semiconductors 74LVT244ADB,112

Name: 74LVT244ADB,112
Brand: NXP Semiconductors
SKU: 74LVT244ADB,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT244ADB,112

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: 74LVT244ADB,112.pdf

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

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Product details

Overview

74LVT244ADB,112 from Nexperia is a 3.3 V octal buffer/line driver with 3-state outputs, designed for high-speed bus interface applications in industrial and embedded systems. It features dual 4-bit buffers controlled by independent active-low output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, overvoltage-tolerant inputs up to 5.5 V, and bus hold circuitry eliminating external pull-ups.

For engineers reviewing the 74LVT244ADB,112 datasheet, 74LVT244ADB,112 pinout, 74LVT244ADB,112 application, or 74LVT244ADB,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), wide 2.7–3.6 V supply range, IOFF power-down support, and compatibility with TTL-level signaling in mixed-voltage backplanes.

Technical Context

This BiCMOS device implements two independent 4-bit non-inverting 3-state buffers, each gated by its own enable input (1OE controls Y0–Y3; 2OE controls Y0–Y3 of second group). The bus hold circuitry actively maintains logic states on unused inputs without external resistors, reducing BOM count and board space.

It supports live insertion/extraction and power-up 3-state behavior, ensuring outputs remain high-impedance during power ramp-up. Input clamping and IOFF circuitry enable partial power-down operation while maintaining signal integrity on shared buses tied to 5 V domains.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	2.7 V to 3.6 V - Enables direct use with 3.3 V logic rails and tolerance to common supply variations.
Input voltage range	0 V to 5.5 V - Allows safe interfacing with 5 V TTL signals without level shifters.
Output drive (LOW)	64 mA - Sinks sufficient current to drive multiple CMOS/TTL loads or terminate stubs on high-speed buses.
Output drive (HIGH)	−32 mA - Sources current adequate for driving light capacitive loads or pull-up-referenced receivers.
Propagation delay	1.0–4.1 ns (VCC = 3.0–3.6 V) - Supports >200 MHz bus operation with tight timing margins.
Bus hold current	±75 μA to ±150 μA - Actively retains input state at VI = 0.8 V or 2.0 V, preventing floating-induced glitches.
IOFF leakage	±100 μA (VCC = 0 V) - Limits backfeed current when powered down, protecting upstream drivers.
Operating temperature	−40 °C to +85 °C - Qualified for industrial ambient environments without derating.

Pinout & Package

74LVT244ADB,112 is packaged in SOT339-1 (SSOP20), a 20-lead shrink small outline package with 0.65 mm pitch and 7.2 mm body width. Pin numbering follows standard SSOP convention with pin 1 marked by index notch.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1OE, 2OE	Active-low output enable inputs - Independently disable first or second group of four outputs into high-impedance state.
2, 4, 6, 8	1A0–1A3	Data inputs for first buffer group - Drive corresponding 1Y0–1Y3 outputs when 1OE = LOW.
11, 13, 15, 17	2A0–2A3	Data inputs for second buffer group - Drive corresponding 2Y0–2Y3 outputs when 2OE = LOW.
18, 16, 14, 12	1Y0–1Y3	3-state outputs for first group - Non-inverting buffered copies of 1A0–1A3, disabled when 1OE = HIGH.
9, 7, 5, 3	2Y0–2Y3	3-state outputs for second group - Non-inverting buffered copies of 2A0–2A3, disabled when 2OE = HIGH.
10	GND	Ground reference - All internal circuitry and I/O referenced to this 0 V node.
20	VCC	Positive supply - Powers internal BiCMOS logic and output stages; must be decoupled locally.

Key Features

Feature	Design Value
Octal 3-state buffering	Two independent 4-bit groups with separate OE control enable flexible bus segmentation and direction management.
Overvoltage-tolerant inputs	Withstands 5.5 V inputs while powered from 3.3 V - eliminates need for external level translators in mixed-voltage systems.
Bus hold circuitry	Retains last valid logic state on un-driven inputs - removes requirement for external pull-up/pull-down resistors and reduces layout complexity.
IOFF partial power-down	Blocks current flow between powered and unpowered sections of a bus - prevents back-powering and ensures safe hot-swap operation.
Live insertion/extraction support	Outputs enter 3-state during power transitions - avoids bus contention when inserting/removing cards in live backplanes.
Latch-up immunity	Exceeds 500 mA per JESD78 Class II Level B - ensures robustness against transient faults in noisy industrial environments.

Applications

Industrial Backplane Interface

Memory Address Buffering

Use Scenario: Isolating and driving address/data lines between CPU and peripheral modules across a 200 mm PCB backplane with 15 pF trace capacitance.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing low-skew, high-drive signal translation between 3.3 V controller and legacy 5 V peripherals.

Use Value: 4.1 ns max propagation delay and 64 mA sink capability maintain signal integrity at 100 MHz bus clock rates without added termination.

Use Scenario: Latching and distributing microcontroller address bits to multiple SRAM and FPGA configuration memory devices sharing a common data bus.

IC Role / Device Role / Timing Role: Octal buffer enabling time-multiplexed access to parallel memory banks via independent OE control of each 4-bit group.

Use Value: Dual OE pins allow interleaved addressing cycles, reducing bus turnaround time by 30% versus single-buffer solutions.

Hot-Swappable Module Control

TTL-Compatible Logic Translation

Use Scenario: Enabling/disabling communication paths in modular PLC I/O carriers that plug into live 24 V DC-powered racks.

IC Role / Device Role / Timing Role: Bus interface IC managing signal isolation during card insertion using IOFF and power-up 3-state behavior.

Use Value: IOFF leakage < ±100 μA prevents backfeeding into unpowered modules, meeting IEC 61000-4-2 system-level ESD survivability requirements.

Use Scenario: Interfacing 3.3 V FPGA I/O banks with legacy 5 V TTL peripherals such as UART transceivers and opto-isolator drivers.

IC Role / Device Role / Timing Role: Level-shifting buffer accepting 5 V inputs while operating from 3.3 V supply and delivering TTL-compatible output swing.

Use Value: Guaranteed VOH ≥ 2.2 V and VOL ≤ 0.55 V at 32 mA load meet TTL VIH/VIL thresholds without external biasing.

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
SN74LVC244APWR	Lower drive (±24 mA), narrower VCC range (1.65–3.6 V), no bus hold or IOFF.	Suitable for low-power, single-supply 3.3 V systems without mixed-voltage or hot-swap requirements.	Select when cost sensitivity outweighs need for overvoltage tolerance and power-down isolation.
74ALVC244MTCX	Faster propagation (≤3.2 ns), same VCC range, but lacks bus hold and IOFF; higher ICC (0.4 mA typical).	Better for ultra-low-latency timing-critical paths where static power and bus integrity are secondary.	Choose only if sub-3.5 ns delay is mandatory and external pull-ups can be accommodated.

Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVT244ADB,112 uniquely combines 5.5 V input tolerance, bus hold, and IOFF in a single octal buffer - making it the only option for robust industrial backplane interfaces requiring zero external biasing and safe live insertion.

Availability

74LVT244ADB,112 is available at Aetrix Electronics and suitable for industrial automation controllers, programmable logic module interconnects, and embedded memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT244ADB,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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVT series targets high-speed, mixed-voltage digital interfacing applications where robustness, low latency, and bus integrity are critical - especially in industrial backplanes and modular control systems.

FAQ

What is the maximum input voltage the 74LVT244ADB,112 can tolerate?

The 74LVT244ADB,112 accepts input voltages up to +5.5 V regardless of VCC level, as confirmed in Table 4 (Limiting Values) and Section 2 (Features). This overvoltage tolerance applies to all data and enable inputs and allows direct connection to 5 V TTL buses without external protection or level shifting.

Does the 74LVT244ADB,112 require external pull-up resistors on unused inputs?

No. The device integrates bus hold circuitry on all data inputs (1A0–1A3, 2A0–2A3), which actively maintains the last valid logic state with ±75 μA to ±150 μA holding current. This eliminates the need for external pull-up or pull-down resistors, reducing component count and PCB area.

Can the 74LVT244ADB,112 be used in hot-swap applications?

Yes. Its IOFF circuitry blocks current flow when VCC = 0 V, and power-up 3-state behavior ensures outputs remain high-impedance during power ramp-up. These features, combined with live insertion/extraction support cited in Section 2, make it suitable for hot-pluggable module designs in industrial backplanes.

What is the guaranteed propagation delay at 3.3 V supply?

At VCC = 3.3 V and Tamb = 25 °C, the typical propagation delay is 2.5 ns (tPLH) and 2.6 ns (tPHL), with maximum values of 4.1 ns for both transitions (Table 7). These values are guaranteed across the full −40 °C to +85 °C operating range per the recommended conditions in Table 5.

74LVT244ADB,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74LVT

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Bulk

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-SSOP

74LVT244ADB,112 FAQ

1.How can I place an order for 74LVT244ADB,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT244ADB,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 74LVT244ADB,112 reliable?

The price and inventory of 74LVT244ADB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT244ADB,112 is usually 5 days.

3.What payment methods are accepted for 74LVT244ADB,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT244ADB,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT244ADB,112?

74LVT244ADB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT244ADB,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 74LVT244ADB,112?

For technical support, including 74LVT244ADB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT244ADB,112 requirements.

6.How does Aetrix verify that 74LVT244ADB,112 is sourced from the original manufacturer or authorized distributors?

All 74LVT244ADB,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 74LVT244ADB,112 meets industry standards.

7.What is the process for return or replacement of 74LVT244ADB,112?

All 74LVT244ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT244ADB,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 74LVT244ADB,112 part is unused and in its original packaging.

Return procedure for 74LVT244ADB,112:

1.Submit a request within 90 days.

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

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