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Texas Instruments SN74LV244ADWRG4
- Part No.:
- SN74LV244ADWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV244ADWRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,298
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Product details
Overview
SN74LV244ADWRG4 from Texas Instruments is an octal 3-state buffer/driver IC designed for bidirectional signal buffering in bus-oriented systems. It features two independent 4-bit groups, each with dedicated output-enable (OE) control, operates from 2 V to 5.5 V, delivers ≤6.5 ns propagation delay at 5 V, and supports mixed-mode voltage interfacing-enabling use in 3.3-V logic driving 5-V loads or vice versa. It is deployed in server backplanes and telecom line-card data routing.
For engineers reviewing the SN74LV244ADWRG4 datasheet, SN74LV244ADWRG4 pinout, SN74LV244ADWRG4 application, or SN74LV244ADWRG4 equivalent, key selection criteria include 3-state drive strength (±16 mA), Ioff partial-power-down capability, ground-bounce immunity (<0.8 V at 3.3 V), and SOIC-20 package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The SN74LV244ADWRG4 implements dual 4-bit noninverting buffers with separate active-low OE controls per group, enabling independent enable/disable of channels 1A–1Y and 2A–2Y. Its balanced CMOS 3-state outputs provide symmetrical sourcing and sinking (up to 16 mA), while standard CMOS inputs ensure high-impedance operation with <2.3 pF input capacitance.
It integrates Ioff circuitry that disables all outputs when VCC = 0 V, preventing backflow current during partial power-down. The device meets JESD17 latch-up immunity (>250 mA) and supports robust noise margins via controlled VOLP (<0.8 V) and VOHV (>2.3 V) at 3.3 V.
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 - ensures sub-7-ns timing margin for high-speed address/data bus buffering |
| IOL/IOH | ±16 mA at VCC = 4.5–5.5 V - drives LEDs directly or sustains signal integrity over 10-cm PCB traces |
| Ioff | ≤5 µA at VCC = 0 V - prevents current leakage during hot-swap or partial system shutdown |
| VOLP / VOHV | <0.8 V / >2.3 V at VCC = 3.3 V - suppresses ground bounce and undershoot in dense multi-driver layouts |
| Operating Temp | –40°C to 125°C - qualified for industrial and telecom infrastructure environments |
| Input Capacitance | 2.3 pF - minimizes capacitive loading on upstream drivers and preserves edge rate |
Pinout & Package
SN74LV244ADWRG4 is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm, with standard 1.27-mm pitch and gull-wing leads suitable for automated SMT assembly and rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight buffered data inputs grouped as two 4-bit lanes; accept TTL- or CMOS-level signals |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state push-pull outputs; each sinks/sourses ±16 mA and enters high-Z when OE is high |
| 1OE, 2OE | Active-Low Enable | Independent control pins; low enables corresponding 4-bit group, high forces outputs to high-impedance |
| VCC | Power Supply | Single 2–5.5-V supply; bypassing with 0.1-µF capacitor near pin required for stable switching |
| GND | Ground Reference | Common return path for all I/O and supply currents; must be low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Allows 3.3-V controller to safely drive 5-V bus lines without external level translation |
| Ioff partial-power-down support | Prevents back-current flow when VCC is off, critical for hot-plug and modular system designs |
| Balanced 3-state drive (±16 mA) | Enables direct LED driving and maintains signal fidelity on long, lightly loaded traces |
| Low ground bounce (VOLP < 0.8 V) | Reduces simultaneous switching noise in multi-buffer applications like memory address drivers |
| JESD17 latch-up immunity | Withstands >250 mA transient stress, meeting industrial reliability requirements |
Applications
| Server Backplane Buffering | LED Display Column Driver |
|---|---|
Use Scenario: Isolating and strengthening address/data signals between CPU module and memory riser card in 1U rack servers. IC Role / Device Role / Timing Role: Octal noninverting buffer with independent OE control per group; provides timing isolation and fanout expansion. Use Value: Enables clean signal transmission across 8+ cm backplane traces while maintaining <6.5 ns tpd and supporting 125°C ambient operation. | Use Scenario: Driving 8-column segments of a 16×128 LED matrix in industrial HMIs. IC Role / Device Role / Timing Role: Constant-current sink driver with 3-state capability for multiplexed column addressing. Use Value: Delivers 16 mA per output without external transistors, simplifying BOM and reducing board space vs discrete solutions. |
| Telecom Line Card Data Routing | Motor-Drive Control Interface |
Use Scenario: Level-shifting and buffering SPI/UART signals between FPGA management plane and PHY daughterboards in optical line terminals. IC Role / Device Role / Timing Role: Mixed-voltage interface buffer; translates 2.5-V FPGA I/O to 3.3-V PHY control lines. Use Value: Eliminates need for discrete level shifters while maintaining <10 ns propagation skew across all 8 channels. | Use Scenario: Isolating microcontroller GPIOs from noisy gate-drive signals in BLDC motor inverters. IC Role / Device Role / Timing Role: Noise-immune digital isolator substitute; buffers PWM and direction signals before optocouplers or gate drivers. Use Value: Suppresses ground bounce (VOLP < 0.8 V) and withstands ESD up to ±2 kV HBM, improving EMC robustness. |
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 |
|---|---|---|---|
| SN74LVC244APWRE4 | Lower VCC min (1.65 V), higher speed (tpd ≤ 5.2 ns @ 3.3 V), TSSOP-20 package (6.5 × 7.8 mm) | Better suited for battery-powered 1.8-V/3.3-V systems; not rated for 125°C operation | Select when operating below 2 V or requiring tighter timing margins; verify thermal derating for high-temp use. |
| 74LVX244M | Same VCC range (2–3.6 V), lower drive (±12 mA), SOIC-20, obsolete by ON Semiconductor | Limited to 3.6-V max; lacks Ioff and mixed-mode support; no 125°C rating | Only for legacy replacement where SN74LV244ADWRG4 is unavailable; requires redesign for full feature parity. |
Compared with SN74LV244ADWRG4, SN74LVC244APWRE4 offers faster performance at lower voltages but sacrifices high-temperature capability, while 74LVX244M provides footprint compatibility but omits Ioff, mixed-mode operation, and industrial temp rating-making SN74LV244ADWRG4 the only option fully supporting hot-swap, wide-VCC, and extended-temperature telecom/server use.
Availability
SN74LV244ADWRG4 is available at Aetrix Electronics and suitable for server backplanes, LED display controllers, and telecom line cards requiring stable component supply, long-lifecycle assurance, and industrial-grade thermal performance.
Supply support for SN74LV244ADWRG4 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions, with leadership in industrial, automotive, and communications markets.
The SN74LV244A product line delivers high-speed, low-voltage, 3-state buffer/driver ICs optimized for bus interface, memory addressing, clock distribution, and mixed-voltage signal conditioning in demanding infrastructure applications.
FAQ
What is the maximum propagation delay of SN74LV244ADWRG4 at 5 V?
The maximum propagation delay (tpd) of SN74LV244ADWRG4 is 6.5 ns under conditions of VCC = 5 V ± 0.5 V, CL = 50 pF, and TA = –40°C to 125°C. This value is specified in the Switching Characteristics table (Section 6.10) of the official TI datasheet SCLS383R and reflects worst-case timing across temperature and voltage extremes-critical for synchronous bus timing budgets.
Does SN74LV244ADWRG4 support partial power-down mode?
Yes, SN74LV244ADWRG4 supports partial power-down mode via its Ioff feature. When VCC = 0 V, all outputs enter high-impedance state and input/output leakage is limited to ≤5 µA, preventing back-current flow from live buses into unpowered sections-a key requirement for hot-swap and modular system architectures.
What package type is used for SN74LV244ADWRG4?
SN74LV244ADWRG4 uses the DW package: a 20-pin SOIC (Small Outline Integrated Circuit) with dimensions 12.80 mm × 10.3 mm, 1.27-mm lead pitch, and gull-wing leads. This package is RoHS-compliant, tape-and-reel packaged (RG4 suffix), and compatible with standard surface-mount assembly processes.
Can SN74LV244ADWRG4 drive LEDs directly?
Yes, SN74LV244ADWRG4 can drive LEDs directly: each output sources or sinks up to ±16 mA at VCC ≥ 4.5 V, sufficient for standard indicator LEDs (e.g., 2–20 mA typical). Designers must calculate series resistance using VOL/VOH specs and ensure total VCC/GND current stays within ±70 mA absolute maximum ratings.
What is the operating temperature range for SN74LV244ADWRG4?
SN74LV244ADWRG4 is rated for an operating free-air temperature range of –40°C to +125°C, as confirmed in Section 6.3 (Recommended Operating Conditions) of the TI datasheet. This industrial-grade rating supports deployment in telecom infrastructure, motor-drive controls, and server environments where ambient temperatures exceed commercial limits.
SN74LV244ADWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- 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:
- 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
SN74LV244ADWRG4 FAQ
1.How can I place an order for SN74LV244ADWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV244ADWRG4 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 SN74LV244ADWRG4 reliable?
The price and inventory of SN74LV244ADWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV244ADWRG4 is usually 5 days.
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SN74LV244ADWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV244ADWRG4 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 SN74LV244ADWRG4?
For technical support, including SN74LV244ADWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV244ADWRG4 requirements.
6.How does Aetrix verify that SN74LV244ADWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV244ADWRG4 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 SN74LV244ADWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LV244ADWRG4?
All SN74LV244ADWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV244ADWRG4, 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 SN74LV244ADWRG4 part is unused and in its original packaging.
Return procedure for SN74LV244ADWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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