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Texas Instruments SN74LVC244ARGYRG4
- Part No.:
- SN74LVC244ARGYRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74LVC244ARGYRG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,455
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Product details
Overview
SN74LVC244ARGYRG4 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), delivers ≤5.9ns propagation delay at 3.3V, supports 5.5V-tolerant inputs, and operates across –40°C to +125°C - enabling use in industrial I/O expansion and mixed-voltage signal translation.
For engineers reviewing the SN74LVC244ARGYRG4 datasheet, SN74LVC244ARGYRG4 pinout, SN74LVC244ARGYRG4 application, or SN74LVC244ARGYRG4 equivalent, this page delivers verified functional identity, VQFN-20 package mapping, confirmed 3-state drive capability, thermal metrics for RGY, and real-world design context for bus buffering, level translation, and high-impedance isolation in server backplanes and LED display controllers.
Technical Context
The SN74LVC244ARGYRG4 implements two independent 4-bit noninverting buffers with CMOS 3-state outputs per bank. Each bank's outputs are simultaneously enabled or disabled via dedicated OE pins (1OE, 2OE), supporting true bus contention avoidance and dynamic signal routing.
Its Ioff feature ensures zero current flow when VCC = 0V, enabling live insertion and partial-power-down operation. Input overvoltage tolerance up to 5.5V allows safe interfacing with 5V logic while powered from 3.3V or lower supplies - a key enabler for mixed-mode communication between legacy and low-voltage subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into modern low-voltage digital systems without level-shifting circuitry. |
| Input Voltage Tolerance | Up to 5.5V - permits connection to 5V buses or sensors without external clamping or translation. |
| Max Propagation Delay | 5.9ns at 3.3V - supports >100MHz data rates on short-to-medium PCB traces. |
| Output Drive Strength | ±24mA at 3.0V - sufficient to drive 50Ω transmission lines or multiple CMOS loads with clean edges. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive modules, industrial motor drives, and telecom base stations. |
| Ioff Leakage | ±20µA at 5.5V - prevents back-driving and signal corruption during power sequencing or hot-swap events. |
| ESD Rating (HBM) | ±2000V - meets JEDEC JS-001 Class 2, reducing need for external protection in board-level ESD zones. |
Pinout & Package
The SN74LVC244ARGYRG4 is packaged in a 4.50mm × 3.50mm VQFN-20 (RGY) with exposed thermal pad, optimized for thermal performance and space-constrained applications such as dense server DIMM slots and compact LED display drivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight buffered input channels, grouped into two 4-bit banks; tolerant to 5.5V regardless of VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state CMOS outputs; high-impedance state isolates downstream circuits during disable. |
| 1OE, 2OE | Input (active-low) | Independent enable controls per bank; low = outputs active, high = outputs high-Z. |
| VCC | Power | Single supply pin for core logic and I/O; must be bypassed with 0.1µF capacitor near pin. |
| GND | Ground | Reference return path for all signals and power; connects to thermal pad for improved heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Enables 5V inputs to interface directly with 3.3V or 1.8V systems - eliminates discrete level shifters in I/O expander designs. |
| Ioff partial-power-down support | Prevents current backflow and signal corruption when VCC is off - critical for hot-pluggable modules and modular power architectures. |
| Balanced CMOS 3-state outputs | Sinks and sources up to ±24mA symmetrically - ensures consistent rise/fall times and reduces timing skew in parallel bus interfaces. |
| Ultra-small VQFN package (RGY) | 4.5mm × 3.5mm footprint with thermal pad - saves >60% board area vs. SOIC-20, ideal for space-limited LED driver PCBs. |
| Low ground bounce (VOLP < 0.8V) | Minimizes noise coupling into shared ground planes - improves signal integrity in multi-channel LED column drivers. |
Applications
| Server Backplane Buffering | LED Display Column Driver |
|---|---|
Use Scenario: Isolating and driving address/data lines between CPU/memory controller and memory modules on high-density server motherboards. IC Role / Device Role / Timing Role: Octal buffer providing bidirectional signal conditioning and bus contention control via independent OE pins. Use Value: Enables reliable 100+ MHz DDR signaling across 10cm+ traces while maintaining timing margins through low tpd and matched drive strength. |
Use Scenario: Driving 8-column segments of high-brightness LED panels in outdoor signage with variable refresh rates. IC Role / Device Role / Timing Role: 3-state output driver translating microcontroller GPIO to higher-current column sink paths. Use Value: Delivers ±24mA per channel at 3.3V with <0.8V ground bounce - minimizing crosstalk and flicker in multiplexed displays. |
| Industrial I/O Expander Interface | Motor Control Signal Isolation |
Use Scenario: Interfacing FPGA-based PLC I/O cards with legacy 5V sensor/actuator buses in factory automation cabinets. IC Role / Device Role / Timing Role: Level-translating buffer allowing 5.5V-tolerant inputs to drive 3.3V logic safely. Use Value: Eliminates need for dual-supply translators; supports full industrial temp range (–40°C to +125°C) without derating. |
Use Scenario: Enabling/disabling gate-drive signals to H-bridge MOSFETs in brushless DC motor controllers. IC Role / Device Role / Timing Role: 3-state buffer acting as hardware-controlled signal gate with fast enable/disable timing (≤9.4ns). Use Value: Prevents shoot-through during startup/shutdown via synchronized OE control - critical for functional safety compliance. |
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; slightly higher ICC (max 40µA vs. 10µA); same RGY package and pinout. | Preferred where unused inputs may float (e.g., unpopulated I/O headers); adds ~0.5ns tpd penalty. | Select SN74LVCH244A only if bus-hold functionality is required to eliminate external pull-ups on unterminated inputs. |
| 74LVC244APW | TSSOP-20 package (6.5mm × 6.4mm); identical electrical specs but higher RθJA (120.3°C/W vs. 82.8°C/W for RGY). | Better suited for prototyping or low-volume assemblies where hand-soldering is preferred over QFN reflow. | Choose 74LVC244APW for manual assembly or thermal budgets permitting >20°C/W higher junction-to-ambient resistance. |
Compared with SN74LVC244ARGYRG4, SN74LVCH244A adds bus-hold but increases static current and delay, while 74LVC244APW trades thermal efficiency for solderability - making RGY the optimal choice for production-grade, thermally constrained, high-density designs.
Availability
SN74LVC244ARGYRG4 is available at Aetrix Electronics and suitable for industrial motor drives, LED display controllers, and server backplane interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for SN74LVC244ARGYRG4 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 and power management ICs.
The SN74LVC244ARGYRG4 belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interfacing in space- and power-constrained applications including computing infrastructure, industrial automation, and consumer displays.
FAQ
What is the maximum operating temperature for the SN74LVC244ARGYRG4?
The SN74LVC244ARGYRG4 is rated for continuous operation from –40°C to +125°C across all packages, including the RGY variant. This specification is validated per JEDEC JESD22-A108 and applies under recommended operating conditions with proper PCB thermal design - making SN74LVC244ARGYRG4 suitable for under-hood automotive modules and industrial motor control enclosures.
Does the SN74LVC244ARGYRG4 support 5V input signals when powered at 3.3V?
Yes, the SN74LVC244ARGYRG4 accepts input voltages up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic families while operating from a 3.3V supply. This capability is explicitly guaranteed in the Recommended Operating Conditions table and does not require external clamping diodes - a core feature of the LVC family used in SN74LVC244ARGYRG4.
What is the purpose of the thermal pad on the SN74LVC244ARGYRG4 RGY package?
The exposed thermal pad on the SN74LVC244ARGYRG4 RGY package must be soldered to a PCB copper pour to achieve specified thermal performance. Data sheet RθJC(bot) = 42.09°C/W assumes full thermal pad connection; omitting it degrades junction-to-board thermal resistance by >3×, risking thermal shutdown in sustained 24mA-per-output operation - a critical design requirement for SN74LVC244ARGYRG4 in LED driver applications.
Can both output-enable pins (1OE and 2OE) be tied together on the SN74LVC244ARGYRG4?
Yes, 1OE and 2OE can be connected to a single control line to enable/disable all eight outputs simultaneously. However, doing so forfeits independent bank control - a key capability of SN74LVC244ARGYRG4 used in applications like dual-bus arbitration or staggered enable sequencing. TI recommends separate routing unless system architecture requires synchronized operation.
Is the SN74LVC244ARGYRG4 pin-compatible with older SN74LVC244A variants in different packages?
Yes, the SN74LVC244ARGYRG4 shares identical pin numbering and function mapping with all standard SN74LVC244A variants (e.g., SOIC-20, TSSOP-20, VQFN-20), including 1A1–1A4, 1Y1–1Y4, 1OE, 2A1–2A4, 2Y1–2Y4, 2OE, VCC, and GND. This uniformity allows drop-in replacement across packages - a documented feature of the SN74LVC244A family referenced in TI's SCAS414AG datasheet.
SN74LVC244ARGYRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-VFQFN Exposed Pad
- 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:
- 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)
SN74LVC244ARGYRG4 FAQ
1.How can I place an order for SN74LVC244ARGYRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244ARGYRG4 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 SN74LVC244ARGYRG4 reliable?
The price and inventory of SN74LVC244ARGYRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244ARGYRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC244ARGYRG4?
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4.How is shipping managed for SN74LVC244ARGYRG4?
SN74LVC244ARGYRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244ARGYRG4 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 SN74LVC244ARGYRG4?
For technical support, including SN74LVC244ARGYRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244ARGYRG4 requirements.
6.How does Aetrix verify that SN74LVC244ARGYRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC244ARGYRG4 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 SN74LVC244ARGYRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC244ARGYRG4?
All SN74LVC244ARGYRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244ARGYRG4, 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 SN74LVC244ARGYRG4 part is unused and in its original packaging.
Return procedure for SN74LVC244ARGYRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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