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Texas Instruments SN74LVC2244ADWRE4
- Part No.:
- SN74LVC2244ADWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC2244ADWRE4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,629
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Product details
Overview
SN74LVC2244ADWRE4 from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features two independent 4-bit sections (1A–1Y and 2A–2Y), dual output-enable inputs (1OE, 2OE), 5.5 ns max propagation delay at 3.3 V, 26-Ω integrated output series resistors, and 5.5-V-tolerant inputs - enabling use in mixed-voltage I/O interfacing between 3.3-V logic and legacy 5-V systems.
For engineers reviewing the SN74LVC2244ADWRE4 datasheet, SN74LVC2244ADWRE4 pinout, SN74LVC2244ADWRE4 application, or SN74LVC2244ADWRE4 equivalent, key selection criteria include its Ioff support for live insertion and partial-power-down, ±12 mA output drive capability per channel, high-impedance state control via dedicated OE pins, and compatibility with SOIC-20 footprint for industrial board-level integration.
Technical Context
The SN74LVC2244ADWRE4 implements dual 4-bit noninverting buffers with independent 3-state control: each section (1 and 2) accepts four parallel inputs (1A1–1A4 / 2A1–2A4), drives corresponding outputs (1Y1–1Y4 / 2Y1–2Y4), and is enabled by its own OE signal (1OE / 2OE). When OE is low, data passes transparently; when high, outputs enter high-impedance state.
Its CMOS design supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling voltage translation without external level shifters. The integrated 26-Ω series output resistance suppresses overshoot/undershoot, eliminating need for external termination resistors in point-to-point routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct interface with 1.8-V, 2.5-V, and 3.3-V logic domains |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V sources without clamping diodes or external protection |
| tpd (Max) | 5.5 ns at VCC = 3.3 V - supports >100 MHz data rates in short trace applications |
| IOL/IOH | ±12 mA per output at VCC = 3.0 V - drives moderate capacitive loads (e.g., 2–3 LVC inputs or PCB traces ≤10 cm) |
| Ioff | ±10 μA max at VCC = 0 V - prevents back-drive current during hot-swap or partial power-down sequences |
| VOHP/VOHP | <0.8 V / >2.0 V at VCC = 3.3 V - ensures clean signal integrity with minimal ground bounce or VOH undershoot |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial handling requirements without special ESD precautions |
Pinout & Package
SN74LVC2244ADWRE4 is packaged in a 20-pin SOIC (DW) with 12.80 mm × 7.50 mm body size, standard 0.300-inch wide DIP-compatible outline, and gull-wing leads suitable for wave or reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for Group 1 and Group 2 buffers respectively |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Eight buffered input terminals - tolerant to 5.5 V regardless of VCC |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | Eight 3-state noninverting outputs with built-in 26-Ω series resistance |
| 10 | GND | Ground reference for all logic and output stages |
| 20 | VCC | Primary power supply (1.65–3.6 V); requires local 0.1-μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Output Resistors | Eliminates need for external series termination, reducing BOM count and PCB area in point-to-point bus drivers |
| Ioff Partial-Power-Down Support | Prevents damaging current flow when VCC = 0 V, enabling safe insertion into powered-backplane systems |
| 5.5-V Input Tolerance | Enables direct connection to 5-V microcontrollers or legacy peripherals without level-shifting circuitry |
| Low Ground Bounce (VOLP < 0.8 V) | Maintains stable reference for adjacent logic in dense digital layouts, reducing noise coupling risk |
| High-Drive 3-State Outputs | ±12 mA drive strength supports fanout to multiple LVC/LVT inputs or moderate capacitive loads (≤30 pF) |
Applications
| Industrial PLC I/O Expansion | Embedded Microcontroller Bus Buffering |
|---|---|
|
Use Scenario: Isolating and driving 8-bit parallel I/O lines from a 3.3-V ARM Cortex-M MCU to 24-V discrete I/O modules via optocouplers or level translators. IC Role / Device Role / Timing Role: Noninverting buffer with independent 3-state control per group, translating 3.3-V logic levels to 5-V-tolerant signaling while providing current gain and noise margin. Use Value: Enables deterministic timing (5.5 ns tpd) and eliminates external termination components, reducing layout complexity in DIN-rail-mounted controllers. |
Use Scenario: Expanding GPIO count on a resource-constrained IoT edge node by buffering signals between a 3.3-V SoC and external sensors, displays, or communication peripherals operating at 5-V logic. IC Role / Device Role / Timing Role: Voltage-tolerant octal driver acting as bidirectional signal conditioner, supporting mixed-voltage system integration without additional level shifters. Use Value: Leverages 5.5-V input tolerance and Ioff to safely interface with legacy 5-V peripherals while maintaining low-power operation at 3.3-V VCC. |
| Test Equipment Digital Pattern Generator | Network Switch Control Plane Interface |
|
Use Scenario: Driving parallel address/data buses in automated test equipment where precise timing, low skew, and configurable output enable are required across multiple channels. IC Role / Device Role / Timing Role: High-speed octal buffer with dual OE control enabling synchronized gating of two 4-bit data paths during pattern generation cycles. Use Value: Achieves sub-6 ns propagation delay consistency across all eight channels, critical for setup/hold timing compliance in high-speed digital stimulus systems. |
Use Scenario: Interfacing a 3.3-V network processor's management interface to multiple 5-V PHY status LEDs, reset controls, and configuration jumpers in enterprise switch hardware. IC Role / Device Role / Timing Role: Level-translating buffer with robust ESD protection (2000-V HBM) and latch-up immunity (>250 mA), ensuring reliability in noisy telecom environments. Use Value: Provides fault-tolerant I/O expansion without external protection devices, simplifying BOM and improving long-term field reliability under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244A | Same functional architecture but lacks Ioff specification; no guaranteed operation at VCC = 0 V | Suitable for fixed-power systems only; not recommended for hot-swap or partial-power-down designs | Select SN74LVC2244ADWRE4 when Ioff protection is required for system-level power sequencing. |
| 74LVC244APW | TSSOP-20 package (6.5 mm × 4.4 mm); identical electrical specs but smaller footprint and higher thermal resistance (RθJA = 102.5°C/W vs. 74.7°C/W for SOIC) | Better suited for space-constrained PCBs; requires tighter thermal management in high-density layouts | Choose SN74LVC2244ADWRE4 for through-hole prototyping, wave-solder compatibility, or improved thermal performance in industrial enclosures. |
Compared with SN74LVC244A and 74LVC244APW, SN74LVC2244ADWRE4 uniquely combines Ioff-enabled hot-swap safety with SOIC-20 mechanical robustness and lower thermal resistance - making it optimal for industrial control and infrastructure applications requiring both reliability and serviceability.
Availability
SN74LVC2244ADWRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller bus buffering, and network switch control plane interface requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74LVC2244ADWRE4 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 connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74LVC2244ADWRE4 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in industrial automation, test equipment, and infrastructure systems where voltage translation and power sequencing resilience are critical.
FAQ
What is the maximum operating temperature range for the SN74LVC2244ADWRE4?
The SN74LVC2244ADWRE4 is rated for operation from –40°C to +125°C ambient temperature, meeting extended industrial temperature requirements. This rating applies across all specified VCC values (1.65 V to 3.6 V) and is validated per JEDEC JESD78 and JESD89 standards. Thermal derating is not required within this range when used with appropriate PCB copper pour and airflow.
Does the SN74LVC2244ADWRE4 support true 5-V to 3.3-V level translation?
Yes - the SN74LVC2244ADWRE4 supports 5-V-tolerant inputs (up to 5.5 V) while operating at VCC = 3.3 V, enabling reliable 5-V → 3.3-V unidirectional level translation. Its outputs swing rail-to-rail (0 V to 3.3 V), so 3.3-V → 5-V translation requires an external pull-up or dedicated translator. The device does not perform bidirectional voltage conversion.
Can unused inputs on the SN74LVC2244ADWRE4 be left floating?
No - all unused inputs on the SN74LVC2244ADWRE4 must be tied to either VCC or GND to prevent undefined logic states, increased ICC, or potential oscillation. TI recommends connecting unused A-inputs to GND (for low state) or VCC (for high state) using short traces; OE inputs should be pulled low (active) or high (disabled) depending on system default behavior.
What is the purpose of the 26-Ω series resistor integrated into each output of the SN74LVC2244ADWRE4?
The 26-Ω series resistor integrated into each output of the SN74LVC2244ADWRE4 serves to dampen signal reflections and reduce overshoot/undershoot on transmission lines, particularly in point-to-point routing with moderate trace lengths (<15 cm) and typical PCB impedances (~50 Ω). It eliminates the need for discrete series termination resistors, simplifying layout and reducing component count.
Is the SN74LVC2244ADWRE4 pin-compatible with older SN74LVC244 variants?
Yes - the SN74LVC2244ADWRE4 is functionally and pin-compatible with SN74LVC244A in SOIC-20 (DW) package, sharing identical pinout, electrical specifications, and logic behavior. However, SN74LVC2244ADWRE4 adds enhanced Ioff performance and updated ESD ratings per JESD22-C101, making it a drop-in replacement with improved robustness for new designs.
SN74LVC2244ADWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- 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:
- 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
SN74LVC2244ADWRE4 FAQ
1.How can I place an order for SN74LVC2244ADWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244ADWRE4 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 SN74LVC2244ADWRE4 reliable?
The price and inventory of SN74LVC2244ADWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244ADWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC2244ADWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244ADWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244ADWRE4?
SN74LVC2244ADWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244ADWRE4 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 SN74LVC2244ADWRE4?
For technical support, including SN74LVC2244ADWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244ADWRE4 requirements.
6.How does Aetrix verify that SN74LVC2244ADWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244ADWRE4 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 SN74LVC2244ADWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC2244ADWRE4?
All SN74LVC2244ADWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244ADWRE4, 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 SN74LVC2244ADWRE4 part is unused and in its original packaging.
Return procedure for SN74LVC2244ADWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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