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Texas Instruments SN74LVC244AGQNR
- Part No.:
- SN74LVC244AGQNR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFBGA
- Datasheet:
-
SN74LVC244AGQNR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
SN74LVC244AGQNR 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 server backplanes and industrial I/O expanders.
For engineers reviewing the SN74LVC244AGQNR datasheet, SN74LVC244AGQNR pinout, SN74LVC244AGQNR application, or SN74LVC244AGQNR equivalent, key selection criteria include VCC range compatibility, 3-state timing (ten/tdis), Ioff-enabled live insertion, mixed-voltage signal translation capability, and QFN-20 package thermal performance (RθJA = 87.2°C/W).
Technical Context
The SN74LVC244AGQNR implements two independent 4-bit noninverting buffer banks with separate 3-state control (1OE/2OE), each performing xYn = xAn logic. Its CMOS input structure accepts up to 5.5V regardless of VCC, enabling down-translation from 5V logic domains to 3.3V buses without level shifters.
It features Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current and supporting partial-power-down operation. Output drive strength is balanced (±24mA at 3V), with ground bounce (VOLP < 0.8V) and undershoot (VOHV > 2V) characterized at 3.3V/25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into 1.8V/2.5V/3.3V digital subsystems without voltage translation |
| Input Voltage Tolerance | Up to 5.5V - allows safe connection to legacy 5V logic without external clamping or level shifters |
| 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 VCC = 3V - sufficient to drive moderate capacitive loads (e.g., 50pF) and multiple CMOS inputs |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and telecom infrastructure applications |
| Ioff Current | ±10µA max at VCC = 0V - ensures zero back-drive during hot-swap or partial power-down sequences |
| ESD Rating (HBM) | ±2000V - meets JEDEC JS-001 requirements for robust handling in automated assembly environments |
Pinout & Package
SN74LVC244AGQNR is packaged in a 20-pin VQFN (RKS) with 4.50mm × 2.50mm body size, 0.5mm maximum height, and exposed thermal pad for enhanced heat dissipation. Pin pitch is 0.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight buffered data inputs, grouped as two 4-bit banks; tolerant to 5.5V regardless of VCC |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state CMOS outputs; high-impedance state activated when corresponding OE is high |
| 1OE, 2OE | Input | Active-low enable controls for Bank 1 and Bank 2 respectively; Ioff active when VCC = 0V |
| VCC | Power | Primary supply (1.65V–3.6V); powers internal logic and output drivers |
| GND | Ground | Reference return path for all signals and power; must be low-impedance for noise control |
| Thermal Pad | Thermal / GND | Exposed copper pad beneath package - must be soldered to PCB ground plane for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V-tolerant inputs with 3.3V VCC enable direct interface between legacy 5V peripherals and modern low-voltage controllers |
| Ioff partial-power-down support | Prevents current backflow when VCC is off, allowing safe live insertion into powered backplanes or hot-swap modules |
| Ultra-small QFN footprint | 4.5mm × 2.5mm RKS package reduces board area by >70% vs. SOIC-20, critical for space-constrained LED displays and network switches |
| Low ground bounce (VOLP) | <0.8V at 3.3V/25°C - minimizes switching noise coupling into shared ground planes in dense digital systems |
| Latch-up immunity | Exceeds 250mA per JESD17 - ensures robustness against transient overcurrent events in motor driver gate-drive interfaces |
Applications
| Server Backplane Interface | Industrial I/O Expander |
|---|---|
Use Scenario: Isolating and buffering address/data lines between CPU module and PCIe expansion slots in 1U rack servers. IC Role / Device Role / Timing Role: Octal 3-state buffer providing bidirectional signal isolation with bank-selectable enable control for hot-plug slot management. Use Value: Enables clean signal routing across long backplane traces (≤12cm) while maintaining timing margin via 5.9ns tpd and low VOLP. |
Use Scenario: Driving discrete I/O pins on PLC base units where microcontroller GPIO count is insufficient. IC Role / Device Role / Timing Role: Level-translating buffer translating 5V sensor/actuator signals to 3.3V MCU logic, with Ioff protecting during firmware updates. Use Value: Eliminates need for discrete level shifters; 5.5V input tolerance and ±24mA drive directly interface relays, optocouplers, and LED indicators. |
| LED Display Column Driver | Telecom Line Card Signal Conditioning |
Use Scenario: Driving column segments of high-density indoor LED video walls requiring fast turn-on/turn-off timing. IC Role / Device Role / Timing Role: High-speed 3-state buffer enabling multiplexed column addressing with precise output disable timing (tdis ≤8ns at 3.3V). Use Value: Supports >1kHz refresh rates with minimal ghosting due to tight propagation skew (<1.5ns) and fast enable/disable transitions. |
Use Scenario: Buffering control signals between FPGA-based packet processors and PHY transceivers on telecom line cards. IC Role / Device Role / Timing Role: Asynchronous bus interface isolating FPGA I/O from noisy analog PHY sections using 3-state isolation and ground-noise suppression. Use Value: Reduces crosstalk-induced bit errors via low VOLP/VOHV and dedicated ground-return paths enabled by thermal-pad grounding. |
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 | TSSOP-20 package (6.5mm × 6.4mm); higher RθJA (120.3°C/W); no thermal pad | Less suitable for thermally constrained LED display modules or high-density telecom cards | Preferred for legacy PCBs with TSSOP footprints and lower power density requirements |
| 74LVC244ABQ | Nexperia variant in DHVQFN-20 (4.5mm × 2.5mm); identical electrical specs but different thermal metrics (RθJA = 84.5°C/W) | Valid drop-in replacement only if layout accommodates alternate land pattern and reflow profile | Consider for dual-sourcing where TI supply continuity is a concern; verify thermal pad solder mask opening |
Compared with SN74LVC244APWR, SN74LVC244AGQNR offers superior thermal performance and smaller footprint; compared with 74LVC244ABQ, it provides identical functionality with TI-specific qualification and documentation traceability - making it optimal for new designs prioritizing miniaturization and thermal headroom.
Availability
SN74LVC244AGQNR is available at Aetrix Electronics and suitable for server backplanes, industrial I/O expanders, and LED display column drivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC244AGQNR 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 decades of expertise in high-reliability interface ICs.
The SN74LVC244AGQNR belongs to TI's LVC logic family, engineered for low-voltage, high-speed bus interfacing in space- and power-constrained applications including computing, industrial automation, and communications infrastructure.
FAQ
What is the maximum input voltage rating for SN74LVC244AGQNR?
The SN74LVC244AGQNR supports input voltages up to 5.5V across its entire operating VCC range (1.65V–3.6V). This overvoltage tolerance allows direct interfacing with 5V logic families without external level-shifting components, and is explicitly specified in the Recommended Operating Conditions table of the official datasheet.
Does SN74LVC244AGQNR support hot-swap or live-insertion capability?
Yes, SN74LVC244AGQNR supports live insertion via its Ioff feature: when VCC = 0V, all outputs enter a high-impedance state with leakage current limited to ±10µA, preventing back-drive current into powered backplanes. This behavior is verified in the Electrical Characteristics table and enables safe insertion into live systems such as modular telecom line cards.
What is the thermal resistance (RθJA) of SN74LVC244AGQNR in its RKS package?
The SN74LVC244AGQNR in the RKS (VQFN-20) package has a junction-to-ambient thermal resistance (RθJA) of 87.2°C/W, as measured under standard JEDEC test conditions. This value assumes proper PCB layout with the thermal pad soldered to a minimum 1-inch² copper pour, and is critical for thermal design in high-density applications like network switch fabric modules.
Can SN74LVC244AGQNR be used for level translation between 5V and 3.3V domains?
Yes, SN74LVC244AGQNR functions as a down-translator: its 5.5V-tolerant inputs accept 5V logic signals while operating from a 3.3V (or lower) VCC, and its outputs swing rail-to-rail within the VCC range. This capability is confirmed in the Features section and validated in the VI and VO specifications under Recommended Operating Conditions.
What is the propagation delay (tpd) of SN74LVC244AGQNR at 3.3V?
The maximum propagation delay (tpd) of SN74LVC244AGQNR is 5.9ns at VCC = 3.3V ±0.3V and TA = 25°C, as specified in the Switching Characteristics table. This value applies to both rising and falling edges and ensures timing compliance in high-speed bus applications such as DDR memory address latching and FPGA I/O expansion.
SN74LVC244AGQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-BGA MICROSTAR JUNIOR (4x3)
SN74LVC244AGQNR FAQ
1.How can I place an order for SN74LVC244AGQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244AGQNR 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 SN74LVC244AGQNR reliable?
The price and inventory of SN74LVC244AGQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244AGQNR is usually 5 days.
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SN74LVC244AGQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244AGQNR 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 SN74LVC244AGQNR?
For technical support, including SN74LVC244AGQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244AGQNR requirements.
6.How does Aetrix verify that SN74LVC244AGQNR is sourced from the original manufacturer or authorized distributors?
All SN74LVC244AGQNR 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 SN74LVC244AGQNR meets industry standards.
7.What is the process for return or replacement of SN74LVC244AGQNR?
All SN74LVC244AGQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244AGQNR, 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 SN74LVC244AGQNR part is unused and in its original packaging.
Return procedure for SN74LVC244AGQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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