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Texas Instruments SN74LVC2244ADW
- Part No.:
- SN74LVC2244ADW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC2244ADW.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:219
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Product details
Overview
SN74LVC2244ADW from Texas Instruments is an octal buffer/line driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features two independent 4-bit channels (1A–1Y and 2A–2Y), dual output-enable inputs (1OE, 2OE), 5.5 ns max propagation delay at 3.3 V, and 26-Ω integrated output series resistors-enabling direct interface with high-speed digital logic in industrial control backplanes.
For engineers reviewing the SN74LVC2244ADW datasheet, SN74LVC2244ADW pinout, SN74LVC2244ADW application, or SN74LVC2244ADW equivalent, key selection criteria include its 3.6 V max VCC rating, 5.5 V-tolerant inputs, Ioff support for live insertion, ±12 mA output drive per channel, and SOIC-20 package compatibility with legacy PCB layouts.
Technical Context
The SN74LVC2244ADW implements dual 4-bit noninverting buffers with independent 3-state control: each OE input enables/disables its associated four Y outputs while preserving input integrity. Its CMOS design supports mixed-voltage signaling-inputs accept up to 5.5 V regardless of VCC (1.65–3.6 V), enabling level translation between 3.3-V system logic and 5-V peripherals.
Output drivers integrate 26-Ω on-die series termination to suppress overshoot/undershoot without external components; Ioff circuitry ensures high-impedance isolation when VCC = 0 V, preventing back-drive current during partial power-down sequences in hot-swap systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-power IoT nodes and standard 3.3-V industrial controllers. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V microcontrollers or sensors without external level shifters. |
| tpd (Max) | 5.5 ns at VCC = 3.3 V - Supports >100 MHz data rates in address/data bus buffering applications. |
| Output Drive | ±12 mA per Y output - Sufficient to drive 50-Ω transmission lines or multiple CMOS inputs with margin. |
| Ioff Current | ±10 μA at VI/VO = 5.5 V - Ensures safe live insertion and prevents damage during board hot-plug events. |
| ESD Rating | 2000-V HBM - Meets industrial equipment robustness requirements per IEC 61000-4-2 Level 3. |
Pinout & Package
SN74LVC2244ADW uses a 20-pin SOIC (DW) package with 12.80 mm × 7.50 mm body size, 1.27 mm pitch, and gull-wing leads compatible with standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enable controls for Group 1 (pins 2,4,6,8 → 18,16,14,12) and Group 2 (pins 11,13,15,17 → 9,7,5,3) outputs. |
| 2,4,6,8,11,13,15,17 | 1A1–1A4, 2A1–2A4 | Eight buffered input terminals-accept 5.5 V logic regardless of VCC; no clamping diodes required. |
| 3,5,7,9,12,14,16,18 | 2Y4–2Y1, 1Y4–1Y1 | Eight 3-state outputs with integrated 26-Ω series resistance-eliminates need for external termination resistors. |
| 10 | GND | Ground reference for all I/O and internal logic; must be low-inductance connection for signal integrity. |
| 20 | VCC | Primary power supply (1.65–3.6 V); requires local 0.1 μF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Output Resistors | Reduces signal reflections and EMI in high-speed traces-no external termination components needed. |
| Ioff Partial-Power-Down Support | Prevents damaging back-current flow when VCC is off, enabling safe hot-swap capability in modular systems. |
| 5.5-V-Tolerant Inputs | Eliminates level-shifter ICs in mixed-voltage designs-simplifies BOM and reduces board space. |
| Low Ground/VCC Bounce | VOLP < 0.8 V and VOHV > 2 V at 3.3 V - Maintains noise margins during simultaneous switching of multiple outputs. |
Applications
| Industrial PLC Backplane Interface | Automated Test Equipment (ATE) Signal Conditioning |
|---|---|
Use Scenario: Buffering and isolating I/O signals between FPGA-based controller modules and field-device terminals in programmable logic controllers. IC Role / Device Role / Timing Role: Octal noninverting buffer with independent 3-state control per group-provides galvanic isolation and drive strength for 24-V sensor/actuator interfaces via level-shifted logic. Use Value: 5.5-V input tolerance allows direct connection to legacy 5-V optocoupler outputs; Ioff protects against backfeed during module replacement. | Use Scenario: Driving multiple DUT (device-under-test) pins simultaneously from a pattern generator in semiconductor test fixtures. IC Role / Device Role / Timing Role: High-speed 3-state line driver-delivers clean, low-skew signals with controlled edge rates to minimize timing uncertainty. Use Value: 5.5 ns tpd at 3.3 V enables sub-10 ns setup/hold windows; integrated 26-Ω resistors suppress ringing on 50-Ω coaxial cabling. |
| Wearable Health Sensor Hub | Network Switch Management Interface |
Use Scenario: Interfacing ultra-low-power MCU GPIOs to higher-drive peripheral sensors (e.g., optical HRM, IMU) in compact wearable form factors. IC Role / Device Role / Timing Role: Voltage-level translating buffer-connects 1.8-V MCU outputs to 3.3-V sensor supply domains while maintaining signal integrity. Use Value: 1.65-V min VCC supports battery voltage down to 2.0 V; 26-Ω series termination prevents overshoot on short PCB traces. | Use Scenario: Isolating and driving status LEDs, fan control signals, and reset lines from baseboard management controllers (BMC) in 1U rack-mounted switches. IC Role / Device Role / Timing Role: Robust 3-state driver-handles mixed 3.3-V BMC logic and 5-V LED/analog monitoring circuits. Use Value: 2000-V HBM ESD rating withstands handling in manufacturing environments; SOIC-20 footprint fits dense server PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244ADW | Same pinout and electrical specs, but lacks Ioff feature and 5.5-V input tolerance-max VI = VCC + 0.3 V. | Not suitable for hot-swap or mixed-voltage systems requiring back-drive protection. | Select SN74LVC2244ADW where live insertion or 5-V interfacing is required. |
| 74LVC2244PW | TSSOP-20 package (6.5 mm × 4.4 mm); identical logic and timing, but smaller footprint and higher thermal resistance (RθJA = 102.5°C/W). | Better suited for space-constrained portable designs; requires tighter layout control for thermal management. | Choose SN74LVC2244ADW for through-hole prototyping or legacy SOIC-compatible assemblies. |
Compared with SN74LVC244ADW and 74LVC2244PW, the SN74LVC2244ADW uniquely combines Ioff-enabled hot-swap safety, 5.5-V input tolerance, and SOIC-20 manufacturability-making it optimal for industrial backplanes and test equipment where reliability and layout compatibility are critical.
Availability
SN74LVC2244ADW is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal conditioning, and network switch management interfaces requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for SN74LVC2244ADW 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 and embedded processing technologies, with over 90 years of innovation in precision analog, power management, and logic solutions.
The SN74LVC2244ADW belongs to TI's LVC (Low-Voltage CMOS) logic family-designed specifically for low-voltage, high-speed digital interfacing in industrial, communications, and computing systems where mixed-voltage operation and robustness are essential.
FAQ
What is the maximum operating temperature range for the SN74LVC2244ADW?
The SN74LVC2244ADW is rated for operation from –40°C to +85°C ambient temperature, as confirmed in TI's official packaging and orderable information. This range applies to all SOIC-20 variants including SN74LVC2244ADW and its tape-and-reel counterpart SN74LVC2244ADWR. Thermal derating is not required within this envelope when mounted per JEDEC standards.
Does the SN74LVC2244ADW support 5-V input signals when powered at 3.3 V?
Yes, the SN74LVC2244ADW supports input voltages up to 5.5 V regardless of VCC level (1.65 V to 3.6 V), as explicitly stated in the "Features" and "Recommended Operating Conditions" sections of the SCAS572L datasheet. This allows direct interfacing with 5-V microcontrollers or sensors without external level-shifting circuitry.
What is the purpose of the 26-Ω series resistance in the SN74LVC2244ADW outputs?
The SN74LVC2244ADW integrates 26-Ω series resistors on all eight Y outputs to dampen signal reflections and reduce overshoot/undershoot in high-speed digital traces. This eliminates the need for discrete termination resistors on PCBs, simplifying layout and improving signal integrity-especially in point-to-point connections with 50-Ω characteristic impedance.
Can the SN74LVC2244ADW be used in hot-swap applications?
Yes, the SN74LVC2244ADW supports hot-swap operation via its Ioff feature, which disables output leakage paths when VCC = 0 V. As documented in the "Features" and "Detailed Description" sections, this prevents damaging back-current flow during live insertion or partial power-down-making it suitable for modular industrial and telecom systems.
What is the pin 1 marking convention for the SN74LVC2244ADW SOIC package?
The SN74LVC2244ADW SOIC (DW) package uses standard JEDEC pin 1 identification: a beveled corner or notch on the top surface of the package aligns with pin 1 (1OE), located at the top-left when viewing the device with markings upright and leads pointing downward. This matches TI's mechanical drawings and tape-and-reel quadrant assignments (Q1 orientation).
SN74LVC2244ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC2244ADW FAQ
1.How can I place an order for SN74LVC2244ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244ADW 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 SN74LVC2244ADW reliable?
The price and inventory of SN74LVC2244ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244ADW is usually 5 days.
3.What payment methods are accepted for SN74LVC2244ADW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244ADW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244ADW?
SN74LVC2244ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244ADW 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 SN74LVC2244ADW?
For technical support, including SN74LVC2244ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244ADW requirements.
6.How does Aetrix verify that SN74LVC2244ADW is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244ADW 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 SN74LVC2244ADW meets industry standards.
7.What is the process for return or replacement of SN74LVC2244ADW?
All SN74LVC2244ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244ADW, 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 SN74LVC2244ADW part is unused and in its original packaging.
Return procedure for SN74LVC2244ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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