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Texas Instruments SN74LV244ADWG4
- Part No.:
- SN74LV244ADWG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV244ADWG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
SN74LV244ADWG4 from Texas Instruments is an octal 3-state buffer/driver IC designed for bidirectional signal buffering in 2-V to 5.5-V systems. It features two independent 4-bit groups, each with dedicated output-enable (OE) control, 6.5 ns maximum propagation delay at 5 V, ±16 mA output drive capability, and Ioff support for partial-power-down operation. It is used in server backplanes and telecom interface boards to isolate and strengthen address/data bus signals between microcontrollers and peripheral ICs.
For engineers reviewing the SN74LV244ADWG4 datasheet, SN74LV244ADWG4 pinout, SN74LV244ADWG4 application, or SN74LV244ADWG4 equivalent, key selection considerations include its dual-OE architecture, mixed-voltage port compatibility, ground-bounce/undershoot performance (VOLP < 0.8 V, VOHV > 2.3 V at 3.3 V), thermal resistance (RθJA = 102.3°C/W in SOIC), and compliance with JESD17 latch-up standards.
Technical Context
The SN74LV244ADWG4 implements a dual-group CMOS buffer architecture with separate 1OE and 2OE inputs controlling four outputs each. Its balanced push-pull outputs deliver symmetrical sourcing/sinking capability up to ±16 mA at VCC = 4.5–5.5 V, enabling robust driving of capacitive loads ≤50 pF while maintaining sub-6.5 ns tpd at 5 V.
It supports true mixed-mode voltage operation: inputs tolerate 0–5.5 V regardless of VCC, and outputs reflect the applied VCC level. The Ioff feature ensures <5 µA power-off leakage when VCC = 0 V, and the internal clamp diodes meet ±2000-V HBM ESD rating per JESD22-A114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - Enables interoperability across 2.5-V, 3.3-V, and 5-V logic domains without level shifters. |
| tpd (max) | 6.5 ns at VCC = 5 V, CL = 50 pF - Guarantees timing margin for high-speed bus interfaces up to ~150 MHz effective data rate. |
| IOH/IOL | ±16 mA at VCC = 4.5–5.5 V - Sustains full drive strength into typical PCB trace + receiver input capacitance without voltage droop. |
| Ioff Leakage | <5 µA at VCC = 0 V - Prevents back-powering and signal contention during hot-swap or partial system shutdown. |
| VOLP / VOHV | <0.8 V / >2.3 V at VCC = 3.3 V - Limits ground bounce and supply undershoot to preserve noise margins in dense digital layouts. |
| ESD Rating | ±2000 V HBM - Meets industrial-grade robustness requirements for board-level handling and field operation. |
| Operating Temp | –40°C to +125°C - Qualified for extended temperature use in telecom infrastructure and motor-drive control environments. |
Pinout & Package
SN74LV244ADWG4 is packaged in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm, with standard 0.65-mm lead pitch and gull-wing leads. Thermal resistance is RθJA = 102.3°C/W, supporting continuous operation at full drive under natural convection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight buffered data inputs, grouped as two independent 4-bit channels (Group 1: pins 2,4,6,8; Group 2: pins 11,13,15,17). |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state outputs, each driven by corresponding A input when OE is active low (Group 1: pins 18,16,14,12; Group 2: pins 9,7,5,3). |
| 1OE, 2OE | Enable Input | Active-low enables for each group - drives all four Y outputs to high-impedance when high; allows independent bus arbitration. |
| VCC (pin 20) | Power Supply | Single positive supply rail (2–5.5 V); powers all logic and output stages; requires local 0.1-µF bypass capacitor. |
| GND (pin 10) | Ground Reference | Common return path for all inputs, outputs, and internal circuitry; must be low-impedance to minimize VOLP. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit enable control | Enables selective isolation of two signal groups on shared buses - e.g., address vs. data lines - without external gating logic. |
| Mixed-mode voltage operation | Accepts input voltages up to 5.5 V independent of VCC, allowing direct interfacing between 3.3-V controllers and 5-V peripherals. |
| Low ground bounce (VOLP < 0.8 V) | Reduces simultaneous switching noise on shared ground planes - critical for signal integrity in LED display column drivers and memory buffers. |
| Ioff partial-power-down support | Prevents current flow through inputs/outputs when VCC = 0 V, eliminating backfeeding and enabling safe insertion/removal in live backplanes. |
| JESD17 latch-up immunity >250 mA | Ensures robustness against transient overvoltage events in industrial motor-control and telecom line-card applications. |
Applications
| Server Backplane Buffering | LED Display Column Driver |
|---|---|
|
Use Scenario: Driving multiplexed address/data lines across 150-mm backplane traces between CPU module and I/O expansion cards. IC Role / Device Role / Timing Role: Octal buffer isolating and strengthening TTL/CMOS signals while minimizing skew between parallel lines. Use Value: 6.5 ns max tpd and matched group delay ensure setup/hold timing closure across 8-bit wide buses operating at 66 MHz. |
Use Scenario: Sourcing current to 8 columns of 7-segment LED displays in industrial HMIs, with dynamic refresh rates up to 1 kHz. IC Role / Device Role / Timing Role: High-current 3-state driver enabling column blanking via OE control during digit scanning. Use Value: ±16 mA per output sustains full brightness at 20 mA/segment with 25% duty cycle, while Ioff prevents ghosting during power-down. |
| Telecom Line Card Interface | Motor-Drive Control Logic Isolation |
|
Use Scenario: Level-shifting and buffering control signals (e.g., RESET, CLKEN) between 3.3-V FPGA and 5-V analog front-end ASICs in base station radios. IC Role / Device Role / Timing Role: Mixed-voltage translator and noise-filtering buffer with controlled edge rates. Use Value: Input tolerance to 5.5 V eliminates external clamping diodes; VOLP < 0.8 V maintains >1.2 V noise margin in RF-dense enclosures. |
Use Scenario: Isolating PWM and direction signals from MCU GPIOs to gate drivers in BLDC motor inverters, where EMI and ground shifts are prevalent. IC Role / Device Role / Timing Role: Robust signal conditioner providing galvanic separation and current gain for noisy 24-V control environments. Use Value: –40°C to +125°C rating and ±2000-V HBM withstand harsh under-hood conditions; dual OE allows synchronized gate driver enable/disable. |
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 | Lower VCC range (1.65–3.6 V); 5.6 ns tpd at 3.3 V; 24-mA drive; TSSOP-20 package (RθJA = 128.2°C/W). | Better suited for low-voltage portable systems; not compatible with 5-V buses or mixed-voltage interfaces. | Select when operating exclusively at 3.3 V and requiring higher drive or smaller footprint than SOIC. |
| 74AC244SCX | Wider VCC range (2–6 V); 5.5 ns tpd at 5 V; no Ioff; SOIC-20; higher ICC (40 µA vs. 20 µA). | Lacks partial-power-down support; less suitable for hot-swap or modular systems requiring safe power sequencing. | Choose for legacy 5-V-only designs where Ioff is unnecessary and AC-family speed/power trade-off is acceptable. |
Compared with SN74LVC244APWR and 74AC244SCX, the SN74LV244ADWG4 uniquely combines 2–5.5-V operation, Ioff, and SOIC thermal performance - making it optimal for industrial backplanes and telecom modules requiring mixed-voltage resilience and safe power-down behavior.
Availability
SN74LV244ADWG4 is available at Aetrix Electronics and suitable for server backplanes, LED display controllers, telecom line cards, and motor-drive control boards requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for SN74LV244ADWG4 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 experience in high-reliability industrial and communications ICs.
The SN74LV244ADWG4 belongs to TI's LV (Low-Voltage) logic family, engineered for interoperability across voltage domains and robust operation in electrically noisy environments such as network infrastructure and factory automation systems.
FAQ
What is the maximum propagation delay of the SN74LV244ADWG4 at 5 V?
The SN74LV244ADWG4 has a maximum propagation delay (tpd) of 6.5 ns at VCC = 5 V, CL = 50 pF, and TA = 25°C. This value is guaranteed across the full operating temperature range (–40°C to +125°C) and applies to both A→Y and OE→Y transitions, ensuring predictable timing in high-speed bus applications.
Does the SN74LV244ADWG4 support partial-power-down mode?
Yes, the SN74LV244ADWG4 supports partial-power-down mode via its Ioff feature. When VCC = 0 V, input and output leakage remains below 5 µA, preventing current backflow and signal contention. This behavior is explicitly characterized in the Electrical Characteristics table and verified per JEDEC JESD78.
What package type is used for the SN74LV244ADWG4?
The SN74LV244ADWG4 uses a 20-pin SOIC (DW) package with dimensions 12.80 mm × 10.3 mm and standard gull-wing leads. Its thermal resistance is RθJA = 102.3°C/W, and it is RoHS-compliant and lead-free, as confirmed in TI's official packaging documentation.
Can the SN74LV244ADWG4 interface between 3.3-V and 5-V logic systems?
Yes, the SN74LV244ADWG4 supports mixed-mode voltage operation: inputs accept 0–5.5 V regardless of VCC, and outputs swing rail-to-rail from GND to the applied VCC. This allows direct connection of 3.3-V controllers to 5-V peripherals without external level shifters, provided VCC is set to the target output voltage.
What is the output drive strength of the SN74LV244ADWG4?
The SN74LV244ADWG4 delivers ±16 mA output drive at VCC = 4.5–5.5 V, as specified in the Electrical Characteristics table under IOH and IOL conditions. This enables reliable driving of multiple CMOS inputs, LED segments, or moderate PCB trace capacitance without external amplification.
SN74LV244ADWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LV244ADWG4 FAQ
1.How can I place an order for SN74LV244ADWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV244ADWG4 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 SN74LV244ADWG4 reliable?
The price and inventory of SN74LV244ADWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV244ADWG4 is usually 5 days.
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4.How is shipping managed for SN74LV244ADWG4?
SN74LV244ADWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV244ADWG4 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 SN74LV244ADWG4?
For technical support, including SN74LV244ADWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV244ADWG4 requirements.
6.How does Aetrix verify that SN74LV244ADWG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV244ADWG4 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 SN74LV244ADWG4 meets industry standards.
7.What is the process for return or replacement of SN74LV244ADWG4?
All SN74LV244ADWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV244ADWG4, 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 SN74LV244ADWG4 part is unused and in its original packaging.
Return procedure for SN74LV244ADWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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