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Texas Instruments SN74LVC244ARGYR
- Part No.:
- SN74LVC244ARGYR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74LVC244ARGYR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:37,142
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Product details
Overview
SN74LVC244ARGYR from Texas Instruments is an octal 3-state buffer/driver IC designed for asynchronous bus interfacing in 1.65V–3.6V systems. It provides two independent 4-bit banks (1A/1Y and 2A/2Y), each controlled by its own output-enable pin (1OE, 2OE), with 5.9ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and Ioff support for live insertion-used in server backplanes and LED display column drivers.
For engineers reviewing the SN74LVC244ARGYR datasheet, SN74LVC244ARGYR pinout, SN74LVC244ARGYR application, or SN74LVC244ARGYR equivalent, this page delivers verified package mapping (RGY VQFN-20), confirmed 3-state timing specs, mixed-voltage interface capability (5.5V input → 3.3V VCC), thermal metrics (RθJA = 82.84°C/W), and validated alternatives for bus buffering in industrial control and telecom infrastructure.
Technical Context
The SN74LVC244ARGYR implements two independent 4-bit noninverting buffers with CMOS 3-state outputs, where each bank's outputs are enabled only when its respective OE pin is low. Its balanced drive strength supports ±24mA per output at 3.0V VCC while maintaining fast edge rates and low ground bounce (VOLP < 0.8V).
It features Ioff circuitry that disables all outputs when VCC = 0V, enabling safe live insertion and partial-power-down operation. Input tolerance up to 5.5V allows direct interfacing with legacy 5V logic without level shifters, and the device operates across –40°C to +125°C ambient temperature in the RGY package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables compatibility with modern low-voltage microcontrollers and FPGAs while supporting mixed-voltage system interfaces. |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to 5V logic signals without external level translation, reducing BOM count and layout complexity. |
| Max Propagation Delay | 5.9ns at 3.3V - Supports high-speed data transfer on PCB traces up to 12cm without signal integrity degradation. |
| Output Drive Strength | ±24mA at 3.0V - Sufficient to drive multiple CMOS loads or moderate capacitive bus lines without external buffers. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive modules, industrial motor drives, and telecom base station control boards. |
| Ioff Support | Active at VCC = 0V - Prevents back-driving and current leakage during hot-swap or partial power-down sequences in modular systems. |
| ESD Rating | ±2000V HBM - Meets industrial-grade ESD robustness requirements for assembly and field operation without additional protection. |
Pinout & Package
The SN74LVC244ARGYR is housed in a 4.50mm × 3.50mm RGY (VQFN-20) package with exposed thermal pad, optimized for compact board space and thermal performance (RθJA = 82.84°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight independent logic inputs grouped into two 4-bit banks; accept 0–5.5V signals regardless of VCC level. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-State Output | Noninverting buffered outputs; enter high-impedance state when corresponding OE is high, enabling bus sharing. |
| 1OE, 2OE | Active-Low Enable | Each controls four outputs in its bank; low enables, high disables - supports independent bus arbitration per channel group. |
| VCC | Power Supply | 1.65V–3.6V supply for internal logic and output drivers; bypassing with 0.1µF capacitor near pin is mandatory for noise immunity. |
| GND | Ground Reference | Common return path for all signals and power; must be connected to low-impedance ground plane to minimize VOLP and VOHV. |
| Thermal Pad | Thermal Conductor | Exposed copper pad on bottom surface - requires solder connection to internal ground plane for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5V-tolerant inputs enable direct interfacing between 5V peripherals and 3.3V system controllers without external translators. |
| Live-insertion support | Ioff functionality prevents current backflow and latch-up when VCC is unpowered, allowing safe hot-plug operation in modular chassis. |
| Low ground bounce | Typical VOLP < 0.8V at 3.3V ensures stable reference for adjacent sensitive analog or clock circuits on shared PCB layers. |
| Ultra-small footprint | RGY VQFN-20 (4.50mm × 3.50mm) reduces board area by >70% vs. SOIC-20, critical for space-constrained LED display driver modules. |
| High-impedance isolation | Outputs achieve < ±1µA leakage in 3-state mode, preventing unintended loading of shared buses during idle or fault conditions. |
Applications
| Server Backplane Interface | LED Display Column Driver |
|---|---|
|
Use Scenario: Isolating and driving address/data lines between CPU module and expansion slot in 1U rack servers. IC Role / Device Role / Timing Role: Octal buffer providing bidirectional signal conditioning and bus contention prevention via independent 3-state control per bank. Use Value: Enables reliable 100MHz+ parallel bus operation over 8cm PCB traces while suppressing crosstalk-induced glitches through matched drive strength. |
Use Scenario: Driving 16-column segments of high-brightness outdoor LED signage using multiplexed scanning. IC Role / Device Role / Timing Role: High-current buffer translating MCU GPIO outputs to sink 20mA per column line with precise timing alignment. Use Value: Delivers consistent brightness across columns by maintaining <1ns skew between outputs, eliminating visible scan-line artifacts. |
| Industrial Motor Control I/O Expander | Telecom Line Card Signal Conditioning |
|
Use Scenario: Interfacing PLC digital outputs to isolated gate drivers in servo amplifier modules operating at 125°C ambient. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer for PWM enable signals, with Ioff protecting during firmware updates. Use Value: Guarantees clean signal edges despite 100pF trace capacitance and eliminates false triggering during brown-out recovery. |
Use Scenario: Buffering control signals between FPGA-based packet processor and PHY transceivers in 10Gbps line cards. IC Role / Device Role / Timing Role: Low-skew, low-capacitance repeater isolating FPGA I/O from noisy analog power domains. Use Value: Reduces inter-symbol interference by limiting output Cpd to 2pF in disabled state, preserving signal integrity at 1.25Gbaud. |
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 |
|---|---|---|---|
| SN74LVCH244A | Includes bus-hold circuitry on all inputs; otherwise identical voltage range, speed, and pinout. | Better suited for systems with floating inputs or long unconnected traces; adds ~1.5µA per input static current. | Select when input signal integrity cannot be guaranteed during system initialization or standby modes. |
| 74LVC244APW | TSSOP-20 package (6.50mm × 6.4mm); same electrical specs but higher RθJA (120.3°C/W) and no thermal pad. | Preferred for prototyping or low-volume production where reworkability outweighs thermal density requirements. | Choose for manual assembly or test fixtures where VQFN rework is impractical, accepting 40% higher junction temperature rise at full load. |
Compared with SN74LVC244ARGYR, SN74LVCH244A adds bus-hold for robustness against floating inputs but increases quiescent current, while 74LVC244APW trades thermal performance and miniaturization for ease of hand-soldering and test access - both require no PCB redesign but differ in thermal management and input bias strategy.
Availability
SN74LVC244ARGYR is available at Aetrix Electronics and suitable for server backplanes, LED display drivers, industrial motor controllers, telecom line cards, and embedded I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC244ARGYR 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 logic solutions with over 50 years of innovation in high-reliability interface ICs.
The SN74LVC244ARGYR belongs to TI's LVC logic family, engineered for low-voltage, high-speed bus interfacing in space-constrained, thermally demanding applications such as networking equipment and industrial automation systems.
FAQ
What is the maximum input voltage rating for SN74LVC244ARGYR?
The SN74LVC244ARGYR accepts input voltages up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic families without level shifters. This specification is guaranteed across the full operating temperature range and is documented in Section 5.3 (Recommended Operating Conditions) of the official TI datasheet SCAS414AG.
Does SN74LVC244ARGYR support hot-swap or live-insertion?
Yes, SN74LVC244ARGYR supports live insertion via its Ioff feature: when VCC = 0V, all outputs are disabled and leakage current is limited to ±10µA (per Electrical Characteristics table), preventing back-driving and damage during hot-plug events in modular systems like server blades or telecom line cards.
What is the thermal resistance (RθJA) of SN74LVC244ARGYR in its RGY package?
The SN74LVC244ARGYR in RGY (VQFN-20) package has a junction-to-ambient thermal resistance of 82.84°C/W, measured under JEDEC JESD51-7 standard conditions. This value assumes proper PCB layout with thermal pad soldered to a solid ground plane - omitting the thermal pad increases RθJA by >25%.
Can SN74LVC244ARGYR drive a 50pF load at 10MHz without signal degradation?
Yes, SN74LVC244ARGYR maintains <7.2ns propagation delay and <1.5ns output skew at 3.3V with 50pF load (per Figure 5-1 and Table 5.6), and its typical output capacitance (Co = 5.5pF) minimizes loading effects. For optimal integrity, use series damping resistors and avoid trace lengths >12cm.
How are the output-enable pins configured on SN74LVC244ARGYR?
SN74LVC244ARGYR has two active-low output-enable pins: 1OE controls outputs 1Y1–1Y4, and 2OE controls 2Y1–2Y4. When either OE is high, its associated four outputs enter high-impedance state; when low, they actively drive - enabling independent bus arbitration for dual-channel applications.
SN74LVC244ARGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-VFQFN Exposed Pad
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (3.5x4.5)
SN74LVC244ARGYR FAQ
1.How can I place an order for SN74LVC244ARGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244ARGYR 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 SN74LVC244ARGYR reliable?
The price and inventory of SN74LVC244ARGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244ARGYR is usually 5 days.
3.What payment methods are accepted for SN74LVC244ARGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC244ARGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC244ARGYR?
SN74LVC244ARGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244ARGYR 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 SN74LVC244ARGYR?
For technical support, including SN74LVC244ARGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244ARGYR requirements.
6.How does Aetrix verify that SN74LVC244ARGYR is sourced from the original manufacturer or authorized distributors?
All SN74LVC244ARGYR 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 SN74LVC244ARGYR meets industry standards.
7.What is the process for return or replacement of SN74LVC244ARGYR?
All SN74LVC244ARGYR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244ARGYR, 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 SN74LVC244ARGYR part is unused and in its original packaging.
Return procedure for SN74LVC244ARGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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