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Texas Instruments SN74LVC244ADGVR
- Part No.:
- SN74LVC244ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC244ADGVR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,648
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Product details
Overview
SN74LVC244ADGVR from Texas Instruments is an octal noninverting 3-state buffer/driver IC designed for asynchronous bus interfacing in 1.65V–3.6V systems. It features dual 4-bit banks, 5.9ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and Ioff support for live insertion-enabling use in server backplanes and LED display column drivers.
For engineers reviewing the SN74LVC244ADGVR datasheet, SN74LVC244ADGVR pinout, SN74LVC244ADGVR application, or SN74LVC244ADGVR equivalent, key selection criteria include VCC operating range (1.65–3.6V), 3-state output enable timing (ten/tdis ≤ 9.4ns), mixed-mode voltage translation capability, and thermal performance in the 5.00mm × 6.4mm TVSOP-20 package.
Technical Context
The SN74LVC244ADGVR implements two independent 4-bit buffer banks, each controlled by a dedicated active-low output enable (1OE/2OE). Each bank performs xYn = xAn, with balanced CMOS 3-state outputs capable of sourcing/sinking ±24mA at 3.0V VCC. Its Ioff circuitry ensures <±10µA leakage when VCC = 0V, enabling partial power-down operation.
It supports mixed-mode signal operation: 5.5V-tolerant inputs allow interfacing with legacy 5V logic while operating from 3.3V or lower supplies, and its output VOH/VOL specifications are guaranteed across –40°C to +125°C ambient temperature for industrial-grade reliability.
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. |
| Input Voltage Tolerance | Up to 5.5V - Allows safe connection to 5V buses without external clamping or translators. |
| tpd (max) | 5.9ns at 3.3V - Supports high-speed data transfer on PCB traces up to ~12cm before requiring impedance control. |
| Ioff Leakage | <±10µA at VCC = 0V - Permits hot-plug operation and prevents back-drive damage during partial power-down. |
| Output Drive | ±24mA at VCC = 3.0V - Sufficient to drive multiple CMOS loads or moderate-capacitance traces directly. |
| Operating Temp | –40°C to +125°C - Qualified for under-hood automotive, industrial motor drives, and telecom infrastructure. |
| ESD Rating | ±2000V HBM - Meets standard handling requirements for automated assembly and field service. |
Pinout & Package
SN74LVC244ADGVR is packaged in a 20-pin TVSOP (DGV) with 0.65mm pitch, body size 5.00mm × 4.40mm, and maximum height 1.2mm. The package includes exposed thermal pad for enhanced heat dissipation in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input (8 total) | Noninverting data inputs for two independent 4-bit banks; 5.5V tolerant regardless of VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Output (8 total) | 3-state buffered outputs; high-impedance when corresponding OE is high. |
| 1OE, 2OE | Active-Low Enable (2) | Independent control per bank; enables/disables all four outputs in that bank simultaneously. |
| VCC | Power Supply | 1.65–3.6V supply; bypass capacitor required at pin for noise suppression. |
| GND | Ground Reference | Return path for all signals and power; must be low-impedance and adjacent to VCC bypass cap. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Accepts 5.5V inputs while powered from 1.65–3.6V - eliminates need for discrete level shifters in mixed-supply systems. |
| Live-insertion support | Ioff limits current to <±10µA when VCC = 0V - enables safe hot-swap in modular backplane and I/O expander applications. |
| Low ground bounce | Typical VOLP < 0.8V at VCC = 3.3V - reduces noise coupling into shared ground planes during simultaneous switching. |
| Ultra-fast enable/disable | ten/tdis ≤ 9.4ns at 3.3V - allows precise timing control for burst-mode data transfers and dynamic bus arbitration. |
| High-impedance state stability | IOZ leakage <±20µA - ensures predictable bus behavior when outputs are disabled, critical for multi-driver contention management. |
Applications
| Server Backplane Interface | LED Display Column Driver |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between CPU module and expansion slot in 1U rack servers. IC Role / Device Role / Timing Role: Octal buffer providing bidirectional signal integrity and isolation between hot-swappable modules. Use Value: Ioff protection prevents back-drive damage during card insertion; 5.5V input tolerance accommodates legacy control signals. |
Use Scenario: Driving 8 parallel columns of high-brightness LEDs in indoor signage with PWM dimming. IC Role / Device Role / Timing Role: Noninverting driver with 3-state outputs enabling time-multiplexed column scanning. Use Value: ±24mA drive capability directly sources LED current; fast tpd supports >1kHz refresh rates without ghosting. |
| Industrial I/O Expander | Network Switch Control Bus |
|
Use Scenario: Extending GPIO count on PLC controller via SPI-to-parallel interface with local buffering. IC Role / Device Role / Timing Role: Signal repeater translating microcontroller-level logic to longer PCB traces driving relay banks. Use Value: 125°C rating ensures reliability in enclosed enclosures; 3-state outputs allow shared bus topology with multiple expanders. |
Use Scenario: Buffering configuration signals (reset, clock enable, port select) between switch ASIC and management MCU. IC Role / Device Role / Timing Role: Low-skew buffer ensuring synchronous assertion of control signals across multi-chip switch fabric. Use Value: 5.9ns tpd and tight tsk(o) ≤1.5ns minimize skew between critical control lines, improving system timing margin. |
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; same VCC range and pinout. | Eliminates need for external pull-up/down resistors on unused or floating inputs. | Preferred where input signal integrity is compromised by long traces or intermittent connections. |
| 74LVC244APW | TSSOP-20 package (6.5mm × 4.4mm); identical electrical specs but larger footprint and higher RθJA (120.3°C/W). | Suitable for prototyping or lower-density boards where thermal headroom exceeds 500mW. | Select when board layout constraints favor TSSOP over TVSOP or when reflow compatibility with legacy processes is required. |
Compared with SN74LVC244ADGVR, SN74LVCH244A adds bus-hold functionality at no speed penalty, while 74LVC244APW trades compactness and thermal efficiency for broader soldering process tolerance-making SN74LVC244ADGVR optimal for space-constrained, thermally demanding industrial designs.
Availability
SN74LVC244ADGVR is available at Aetrix Electronics and suitable for server backplane interfaces, LED display column drivers, industrial I/O expanders, network switch control buses, and motor driver gate signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for SN74LVC244ADGVR 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 digital interface ICs.
The SN74LVC244ADGVR belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust 1.65–3.6V operation with 5V-tolerant inputs-targeting industrial, computing, and communications systems needing low-power, high-speed bus buffering.
FAQ
What is the maximum input voltage the SN74LVC244ADGVR can tolerate?
The SN74LVC244ADGVR accepts input voltages up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic families while operating from 1.65V–3.6V supplies. This overvoltage tolerance is guaranteed across the full operating temperature range and does not require external clamping diodes. The SN74LVC244ADGVR maintains this specification even during power-up/power-down transitions due to its internal clamp diode structure.
Does the SN74LVC244ADGVR support hot-swap or live-insertion applications?
Yes, the SN74LVC244ADGVR supports live insertion via its Ioff feature, which limits input/output leakage to <±10µA when VCC = 0V. This prevents back-drive current from downstream circuits into the unpowered device, protecting both the SN74LVC244ADGVR and connected components during hot-plug events in modular backplanes or I/O expanders.
What is the recommended bypass capacitor for the SN74LVC244ADGVR?
A 0.1µF ceramic capacitor is recommended for bypassing VCC on the SN74LVC244ADGVR, placed as close as possible to the VCC pin with a short, low-inductance ground return path. For improved high-frequency noise rejection, TI recommends paralleling with a 1µF capacitor. The SN74LVC244ADGVR's fast edge rates make proper decoupling essential to prevent ground bounce and ensure stable 3-state transitions.
Can the SN74LVC244ADGVR be used for level translation between 5V and 3.3V systems?
Yes, the SN74LVC244ADGVR functions as a down-translator: its 5.5V-tolerant inputs accept 5V signals while operating from a 3.3V (or lower) VCC, and its outputs swing rail-to-rail within the VCC range. This allows it to translate 5V control signals to 3.3V logic levels without external components-verified in TI's application notes for mixed-mode bus interfacing.
What is the thermal resistance (RθJA) of the SN74LVC244ADGVR in its DGV package?
The SN74LVC244ADGVR in the TVSOP-20 (DGV) package has a junction-to-ambient thermal resistance (RθJA) of 128.7°C/W, as specified in TI's official thermal metrics table. This value assumes standard JEDEC 2-layer board conditions; actual performance improves with PCB copper area, thermal vias, and proximity to other heat-dissipating components. The SN74LVC244ADGVR's 500mW maximum power dissipation requires careful thermal design above 60°C ambient.
SN74LVC244ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TFSOP (0.173", 4.40mm 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74LVC244ADGVR FAQ
1.How can I place an order for SN74LVC244ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244ADGVR 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 SN74LVC244ADGVR reliable?
The price and inventory of SN74LVC244ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244ADGVR is usually 5 days.
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SN74LVC244ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244ADGVR 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 SN74LVC244ADGVR?
For technical support, including SN74LVC244ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244ADGVR requirements.
6.How does Aetrix verify that SN74LVC244ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVC244ADGVR 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 SN74LVC244ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LVC244ADGVR?
All SN74LVC244ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244ADGVR, 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 SN74LVC244ADGVR part is unused and in its original packaging.
Return procedure for SN74LVC244ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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