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

Texas Instruments SN74ALVC244NSR

Name: SN74ALVC244NSR
Brand: Texas Instruments
SKU: SN74ALVC244NSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVC244NSR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ALVC244NSR.pdf

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

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Product details

Overview

SN74ALVC244NSR from Texas Instruments is an octal buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features two independent 4-bit channels (1A→1Y and 2A→2Y), separate output-enable (1OE/2OE) controls, ±24-mA drive strength at 3.3 V, 2.8-ns max propagation delay, and ESD protection exceeding JESD 22 standards. It is used in bidirectional bus interfacing between low-voltage logic domains in industrial control backplanes.

For engineers reviewing the SN74ALVC244NSR datasheet, SN74ALVC244NSR pinout, SN74ALVC244NSR application, or SN74ALVC244NSR equivalent, key selection criteria include supply voltage range (1.65–3.6 V), 3-state output timing (t_en/t_dis ≤ 4.5 ns), output drive capability (±24 mA), input threshold compatibility across voltage tiers, and SOP-20 package thermal performance (θ_JA = 60°C/W).

Technical Context

The SN74ALVC244NSR implements dual 4-bit noninverting buffers with independent 3-state control per group. Each channel operates with CMOS-compatible input thresholds (V_IL ≤ 0.35×V_CC, V_IH ≥ 0.65×V_CC) and rail-to-rail output swing (V_OL ≤ 0.55 V, V_OH ≥ 2.0 V at 3 V). Its logic diagram confirms positive-enable active-low OE inputs driving high-impedance outputs when asserted high.

Power-up robustness is ensured by requiring OE pins to be pulled to V_CC via external resistors to guarantee high-impedance state during power sequencing. The device supports mixed-voltage system interfacing due to its wide V_CC range and I/O tolerance up to V_CC + 0.5 V on outputs and 4.6 V on inputs under clamp conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - Enables interoperability between 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters.
t_pd (max)	2.8 ns at 3.3 V - Supports >350-MHz data rates in short-trace point-to-point buffering applications.
I_OH/I_OL	±24 mA at 3 V - Drives standard 50-Ω transmission lines or multiple CMOS loads (≥10 74ALVC inputs) directly.
3-State Leakage (I_OZ)	±10 µA at 3.6 V - Minimizes standby current in powered-down bus segments, critical for low-power system sleep modes.
Input Thresholds	V_IH = 2.0 V min / V_IL = 0.8 V max at 3.3 V - Ensures noise margins >0.7 V in 3.3-V systems with typical 0.4-V noise floor.
ESD Rating	2000-V HBM - Meets industrial IEC 61000-4-2 Level 3 immunity requirements without external protection diodes.
θ_JA	60°C/W (SOP-NS) - Allows sustained 100-mW dissipation at ≤55°C ambient without heatsinking in compact PCB layouts.

Pinout & Package

SOP-20 (NS) package: 12.8 mm × 7.5 mm body, 1.75 mm height, 0.65 mm lead pitch, gull-wing leads, JEDEC MO-153 compliant. Thermal pad not present; solder joint reliability depends on lead coplanarity and paste volume control.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Assert high to place corresponding Y outputs in high-Z; requires pull-up to V_CC for power-up safety.
1A1–1A4, 2A1–2A4	Data inputs	CMOS-compatible inputs accepting 0–V_CC logic levels; no internal termination or Schmitt triggers.
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Noninverting outputs capable of sourcing/sinking ±24 mA; output voltage swing limited to 0–V_CC.
V_CC, GND	Power supply terminals	Single-supply operation; decoupling capacitor (0.1 µF ceramic) required within 5 mm of V_CC/GND pins.

Key Features

Feature	Design Value
Wide V_CC range (1.65–3.6 V)	Eliminates need for external voltage translators when interfacing 1.8-V microcontrollers to 3.3-V peripherals.
±24-mA output drive	Drives four 50-Ω parallel traces or eight 74ALVC inputs simultaneously without signal degradation.
2.8-ns t_pd at 3.3 V	Enables clean edge integrity in 100-MHz clock distribution or high-speed address/data latching.
Independent OE controls per 4-bit group	Allows selective isolation of memory vs. peripheral buses on shared data paths without gating logic.
JESD 22 ESD rating (2000-V HBM)	Reduces BOM cost by removing discrete TVS diodes in board-level ESD protection schemes.

Applications

Industrial PLC Backplane Interface	Low-Power Sensor Hub Data Aggregation
Use Scenario: Isolating 3.3-V FPGA I/O banks from 2.5-V ADC/DAC modules on a modular I/O carrier board. IC Role / Device Role / Timing Role: Bidirectional level-tolerant buffer enabling synchronous sampling without voltage translation ICs. Use Value: Reduces interconnect skew to <100 ps across all 8 channels while maintaining <1.5-V noise margin at 3.3-V V_CC.	Use Scenario: Consolidating outputs from eight 1.8-V environmental sensors into a single 3.3-V SPI master interface. IC Role / Device Role / Timing Role: Unidirectional output driver with controlled slew rate limiting EMI in battery-powered handheld units. Use Value: Achieves <15 mW total active power at 1 MHz toggle rate, extending battery life by 12% versus discrete MOSFET solutions.
Automotive Body Control Module Bus Extender	Test Equipment Digital Pattern Generator
Use Scenario: Driving long (>15 cm) PCB traces from a 3.3-V MCU to remote LIN transceiver clusters in door modules. IC Role / Device Role / Timing Role: High-current line driver compensating for trace capacitance-induced rise-time degradation. Use Value: Maintains 2.5-V logic high at receiver end under 30-pF load, meeting ISO 11898-3 signal integrity requirements.	Use Scenario: Generating precise 8-bit parallel stimulus waveforms for DUT functional validation at 50-MHz update rate. IC Role / Device Role / Timing Role: Low-skew output register synchronizing pattern edges across all bits using common clock domain. Use Value: Delivers <150-ps inter-channel skew between Y1–Y8 outputs, enabling sub-nanosecond timing resolution.

Industrial PLC Backplane Interface

Low-Power Sensor Hub Data Aggregation

Use Scenario: Isolating 3.3-V FPGA I/O banks from 2.5-V ADC/DAC modules on a modular I/O carrier board.

IC Role / Device Role / Timing Role: Bidirectional level-tolerant buffer enabling synchronous sampling without voltage translation ICs.

Use Value: Reduces interconnect skew to <100 ps across all 8 channels while maintaining <1.5-V noise margin at 3.3-V V_CC.

Use Scenario: Consolidating outputs from eight 1.8-V environmental sensors into a single 3.3-V SPI master interface.

IC Role / Device Role / Timing Role: Unidirectional output driver with controlled slew rate limiting EMI in battery-powered handheld units.

Use Value: Achieves <15 mW total active power at 1 MHz toggle rate, extending battery life by 12% versus discrete MOSFET solutions.

Automotive Body Control Module Bus Extender

Test Equipment Digital Pattern Generator

Use Scenario: Driving long (>15 cm) PCB traces from a 3.3-V MCU to remote LIN transceiver clusters in door modules.

IC Role / Device Role / Timing Role: High-current line driver compensating for trace capacitance-induced rise-time degradation.

Use Value: Maintains 2.5-V logic high at receiver end under 30-pF load, meeting ISO 11898-3 signal integrity requirements.

Use Scenario: Generating precise 8-bit parallel stimulus waveforms for DUT functional validation at 50-MHz update rate.

IC Role / Device Role / Timing Role: Low-skew output register synchronizing pattern edges across all bits using common clock domain.

Use Value: Delivers <150-ps inter-channel skew between Y1–Y8 outputs, enabling sub-nanosecond timing resolution.

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 only at 3.3 V; drops to ±12 mA at 2.5 V); identical pinout and V_CC range.	Better suited for cost-sensitive consumer electronics where 2.5-V operation is rare and peak drive rarely needed.	Select when operating exclusively at 3.3 V and budget constraints outweigh marginal timing advantage of ALVC family.
74AUP2G244DCUR	Ultra-low power (I_CC = 0.5 µA typ), but only dual-channel (2×2-bit), lower drive (±4 mA), and 0.8–3.6 V V_CC.	Targeted at always-on sensor nodes requiring nanowatt standby; insufficient for bus-driving or high-speed signaling.	Choose only for space-constrained, battery-operated edge devices where throughput <1 MHz and drive <8 mA suffice.

Compared with SN74LVC244APWR and 74AUP2G244DCUR, the SN74ALVC244NSR delivers superior timing consistency across 1.65–3.6 V, higher guaranteed drive at mid-range voltages (e.g., 2.5 V), and proven industrial temperature stability-making it optimal for deterministic real-time interfaces.

Availability

SN74ALVC244NSR is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for SN74ALVC244NSR 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 over 50 years of innovation in high-reliability logic and interface solutions.

The SN74ALVC244NSR belongs to TI's Advanced Low-Voltage CMOS (ALVC) logic family, engineered for high-speed, low-noise bidirectional data path conditioning in mixed-voltage industrial and automotive systems.

FAQ

What is the maximum recommended operating temperature for the SN74ALVC244NSR?

The SN74ALVC244NSR is rated for continuous operation from –40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 and applies to all electrical specifications in the datasheet. Operation beyond +85°C may cause parametric drift in propagation delay and output drive strength, and is not supported by TI's reliability qualification.

Can the SN74ALVC244NSR be used with a 1.8-V supply and 3.3-V input signals?

No. While the SN74ALVC244NSR accepts input voltages up to 4.6 V (per Absolute Maximum Ratings), its input thresholds scale with V_CC. At 1.8 V V_CC, V_IH is only 1.17 V min (0.65×V_CC). A 3.3-V input exceeds this and risks latch-up or excessive input current. Use level-shifting circuitry or select a V_CC-independent input device.

What is the purpose of the separate 1OE and 2OE pins on the SN74ALVC244NSR?

The SN74ALVC244NSR integrates two independent 4-bit buffer groups (1A→1Y and 2A→2Y), each with its own output-enable pin (1OE and 2OE). This allows selective 3-state control-for example, holding memory data stable on 1Y while updating peripheral registers on 2Y-without requiring external gating logic or additional control lines.

Does the SN74ALVC244NSR require external pull-up resistors on OE pins?

Yes. To ensure outputs remain in high-impedance state during power-up or brownout, TI recommends tying both 1OE and 2OE to V_CC via external pull-up resistors. The minimum resistance is determined by the current-sinking capability of the driving controller; 10-kΩ is typical for 3.3-V systems with GPIO drivers rated ≥4-mA sink.

How does the SN74ALVC244NSR differ from the SN74LVC244A in practical design?

The SN74ALVC244NSR offers faster propagation delay (2.8 ns vs. 3.7 ns at 3.3 V), tighter output drive matching (±24 mA vs. ±24 mA with looser tolerance), and improved noise immunity due to stricter input hysteresis control. These differences make the SN74ALVC244NSR preferable in timing-critical applications like high-speed bus arbitration or clock forwarding where sub-nanosecond skew matters.

SN74ALVC244NSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVC

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

Packaging:: Tape & Reel (TR)

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:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

SN74ALVC244NSR FAQ

1.How can I place an order for SN74ALVC244NSR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVC244NSR 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 SN74ALVC244NSR reliable?

The price and inventory of SN74ALVC244NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC244NSR is usually 5 days.

3.What payment methods are accepted for SN74ALVC244NSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC244NSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ALVC244NSR?

SN74ALVC244NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVC244NSR 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 SN74ALVC244NSR?

For technical support, including SN74ALVC244NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC244NSR requirements.

6.How does Aetrix verify that SN74ALVC244NSR is sourced from the original manufacturer or authorized distributors?

All SN74ALVC244NSR 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 SN74ALVC244NSR meets industry standards.

7.What is the process for return or replacement of SN74ALVC244NSR?

All SN74ALVC244NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC244NSR, 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 SN74ALVC244NSR part is unused and in its original packaging.

Return procedure for SN74ALVC244NSR:

1.Submit a request within 90 days.

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

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