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Texas Instruments SN74LVC2244ADBR
- Part No.:
- SN74LVC2244ADBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC2244ADBR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,758
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Product details
Overview
SN74LVC2244ADBR 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 resistance, 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 SN74LVC2244ADBR datasheet, SN74LVC2244ADBR pinout, SN74LVC2244ADBR application, or SN74LVC2244ADBR equivalent, key selection criteria include its Ioff support for live insertion and partial-power-down, ±12 mA output drive capability per channel, 3-state bus isolation behavior, and SSOP-20 package compatibility with space-constrained industrial control and server backplane designs.
Technical Context
The SN74LVC2244ADBR implements dual 4-bit noninverting buffers with independent 3-state control: each section (1 and 2) has four inputs (1A1–1A4, 2A1–2A4), four outputs (1Y1–1Y4, 2Y1–2Y4), and one dedicated output-enable input (1OE, 2OE). Outputs enter high-impedance state when OE is high; data passes through when OE is low.
Its CMOS design supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling level translation without external components. The Ioff feature disables all outputs and isolates inputs when VCC = 0 V, preventing back-drive current during hot-swap or power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct integration into modern low-voltage digital systems including battery-powered IoT nodes and 3.3-V FPGA I/O banks. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V microcontrollers or legacy peripherals without level-shifting circuitry. |
| tpd (Max) | 5.5 ns at VCC = 3.3 V - supports high-speed data buffering in timing-critical applications such as memory interface expansion or sensor data aggregation. |
| Output Drive | ±12 mA per output at VCC = 3.0 V - sufficient to directly drive LEDs, small relays, or multiple CMOS loads without external drivers. |
| Ioff Support | Active at VCC = 0 V - ensures robust isolation during hot-plug events or partial system power-down in modular industrial equipment. |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial-grade reliability requirements for deployment in factory automation and test instrumentation. |
Pinout & Package
SN74LVC2244ADBR is packaged in a 20-pin SSOP (Shrink Small Outline Package) with body dimensions of 7.20 mm × 5.30 mm and 0.65-mm lead pitch. This compact surface-mount package supports automated assembly and provides thermal performance suitable for continuous operation at ambient temperatures up to 85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for respective 4-bit sections - tying high disables outputs into high-impedance state for bus sharing. |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Buffer input terminals - accept 5.5-V-tolerant logic signals and pass through to corresponding Y outputs when OE is asserted. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | Noninverting buffered outputs - include built-in 26-Ω series resistance to dampen overshoot/undershoot on transmission lines. |
| 10 | GND | Ground reference for all internal circuitry and output current return path. |
| 20 | VCC | Primary power supply input - must be decoupled with ≥0.1 μF ceramic capacitor placed adjacent to pin for stable switching operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Output Series Resistance | Eliminates need for external termination resistors on PCB traces, reducing component count and layout complexity in high-speed digital interfaces. |
| Mixed-Mode Signal Operation | Enables direct interconnection between 3.3-V logic domains and 5-V peripherals without external voltage translators or level shifters. |
| Ioff Partial-Power-Down Protection | Prevents damaging current flow from powered sections into unpowered sections during board hot-swap or staggered power-up sequences. |
| High-Speed Switching Performance | 5.5 ns max tpd at 3.3 V allows use in sub-100-MHz clock domains for data routing, address latching, and bus buffering applications. |
Applications
| Industrial PLC I/O Expansion | Server Backplane Signal Buffering |
|---|---|
Use Scenario: Expanding discrete I/O capacity on programmable logic controller modules using 3.3-V FPGAs while interfacing with legacy 24-V DC sensors and actuators via level-translating digital inputs. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates FPGA I/O pins from field-side transients and provides robust 5.5-V-tolerant input handling. Use Value: Eliminates need for discrete level shifters and reduces BOM cost by integrating 8-channel buffering with built-in ESD protection and Ioff safety. | Use Scenario: Driving parallel control signals across long backplane traces in rack-mounted servers where impedance matching and signal integrity are critical. IC Role / Device Role / Timing Role: High-speed octal buffer with integrated 26-Ω series termination minimizes reflections and ringing on unterminated stubs. Use Value: Achieves clean edge transitions at >50 MHz without external resistors, simplifying layout and improving timing margin in multi-slot chassis designs. |
| Wearable Health Sensor Hub | Automated Test Equipment (ATE) Digital Pattern Generator |
Use Scenario: Aggregating digital outputs from multiple low-power biosensors (ECG, SpO₂, motion) into a shared SPI/I²C hub running at 3.3 V. IC Role / Device Role / Timing Role: Low-voltage octal buffer isolates sensor outputs from hub MCU during sleep mode using 3-state control and Ioff. Use Value: Enables zero-current leakage paths during standby, extending battery life in portable medical devices while maintaining fast wake-up response. | Use Scenario: Generating precise, synchronized digital stimulus patterns for IC functional testing where output drive strength and timing consistency are essential. IC Role / Device Role / Timing Role: Precision-buffered signal source with matched propagation delays across all eight channels and tight VOH/VOL specs. Use Value: Delivers deterministic timing alignment across parallel test vectors, reducing pattern setup time and improving test coverage accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244A | Same logic function and pinout but lacks Ioff support and has higher ICC (10 μA vs. 5 μA typical) - no partial-power-down capability. | Suitable only for fully powered systems; not recommended for hot-swap or modular chassis requiring live insertion. | Select SN74LVC244A only if Ioff is unnecessary and lower static current is not required. |
| 74LVC244APW | TSSOP-20 package (6.5 mm × 4.4 mm) instead of SSOP-20 (7.2 mm × 5.3 mm); identical electrical specs and pinout. | Better suited for ultra-dense layouts where footprint area is constrained more than height or thermal mass. | Choose 74LVC244APW when board real estate is prioritized over thermal dissipation or mechanical robustness. |
Compared with SN74LVC2244ADBR, SN74LVC244A omits Ioff and offers less robust ESD protection, while 74LVC244APW delivers identical functionality in a smaller footprint but with reduced thermal margin - making SN74LVC2244ADBR optimal for industrial environments requiring hot-swap resilience and stable thermal performance.
Availability
SN74LVC2244ADBR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, server backplane signal buffering, and wearable health sensor hub designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74LVC2244ADBR 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 company specializing in analog and embedded processing technologies, with leadership in logic, power management, and signal chain solutions.
The SN74LVC2244ADBR belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for high-speed, low-power operation in mixed-voltage digital systems - particularly targeting industrial automation, communications infrastructure, and portable electronics.
FAQ
What is the maximum operating temperature range for SN74LVC2244ADBR?
The SN74LVC2244ADBR is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade temperature range ensures reliable performance in factory automation controllers, network switches, and outdoor test equipment where environmental extremes are common. The device maintains specified electrical characteristics-including propagation delay, output drive, and Ioff behavior-across this full range, as validated in TI's SCAS572L datasheet revision July 2014.
Does SN74LVC2244ADBR support 5-V input signals when powered at 3.3 V?
Yes, SN74LVC2244ADBR supports input voltages up to 5.5 V regardless of VCC level (1.65 V to 3.6 V), enabling seamless interfacing between 5-V legacy peripherals and 3.3-V host logic. This overvoltage tolerance is implemented at the silicon level and does not require external clamping diodes or level translators. The SN74LVC2244ADBR datasheet explicitly confirms this capability in Section 7.3 (Recommended Operating Conditions) and Feature #2.
How does the Ioff feature function in SN74LVC2244ADBR during power-down?
The Ioff feature in SN74LVC2244ADBR disables all outputs and isolates inputs when VCC = 0 V, preventing current backflow from powered system sections into unpowered ones. This protects downstream circuitry during hot-swap events or partial power-down sequences. The SN74LVC2244ADBR maintains this behavior across its full –40°C to +85°C operating range and is verified per JESD78 latch-up testing standards.
What package type is used for SN74LVC2244ADBR, and what are its key mechanical dimensions?
SN74LVC2244ADBR uses the SSOP-20 (DB) package with nominal body dimensions of 7.20 mm × 5.30 mm and 0.65-mm lead pitch. Its lead finish is NiPdAu (NIPDAU), moisture sensitivity level is Level-1 (unlimited floor life at ≤30°C/60% RH), and it is RoHS compliant. These specifications are confirmed in TI's official Package Option Addendum dated 10-Nov-2025.
Can SN74LVC2244ADBR drive standard TTL loads directly?
Yes, SN74LVC2244ADBR can directly drive standard TTL loads due to its ±12 mA output drive capability at VCC = 3.0 V and VOL ≤ 0.55 V / VOH ≥ 2.4 V under those conditions. Its 26-Ω integrated series resistance also helps match typical PCB trace impedances, reducing overshoot when driving capacitive TTL inputs. This capability is documented in Sections 7.5 (Electrical Characteristics) and 9.1 (Detailed Description) of the SN74LVC2244ADBR datasheet.
SN74LVC2244ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 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-SSOP
SN74LVC2244ADBR FAQ
1.How can I place an order for SN74LVC2244ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244ADBR 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 SN74LVC2244ADBR reliable?
The price and inventory of SN74LVC2244ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244ADBR is usually 5 days.
3.What payment methods are accepted for SN74LVC2244ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244ADBR?
SN74LVC2244ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244ADBR 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 SN74LVC2244ADBR?
For technical support, including SN74LVC2244ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244ADBR requirements.
6.How does Aetrix verify that SN74LVC2244ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244ADBR 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 SN74LVC2244ADBR meets industry standards.
7.What is the process for return or replacement of SN74LVC2244ADBR?
All SN74LVC2244ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244ADBR, 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 SN74LVC2244ADBR part is unused and in its original packaging.
Return procedure for SN74LVC2244ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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