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Texas Instruments SN74LVC2244ADBRG4
- Part No.:
- SN74LVC2244ADBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC2244ADBRG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,321
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Product details
Overview
SN74LVC2244ADBRG4 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), each with dedicated output-enable (1OE/2OE), supports 5.5-V tolerant inputs, delivers ≤5.5 ns propagation delay at 3.3 V, and integrates 26-Ω series output resistors-enabling direct interface with high-speed digital buses in mixed-voltage systems.
For engineers reviewing the SN74LVC2244ADBRG4 datasheet, SN74LVC2244ADBRG4 pinout, SN74LVC2244ADBRG4 application, or SN74LVC2244ADBRG4 equivalent, key selection criteria include its Ioff support for live insertion, ±12 mA output drive capability per channel, 3-state timing parameters (ten/tdis ≤7.1 ns at 3.3 V), and compatibility with 1.8-V/2.5-V/3.3-V logic families in industrial control and data acquisition subsystems.
Technical Context
The SN74LVC2244ADBRG4 implements dual 4-bit noninverting buffers with independent 3-state control: 1OE governs outputs Y1–Y4, while 2OE controls Y1–Y4 of the second section. Each output stage includes integrated 26-Ω series termination to suppress overshoot/undershoot without external components.
It supports mixed-mode signal operation-inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling seamless level translation between 5-V legacy peripherals and 3.3-V or lower core logic. The Ioff feature isolates inputs and outputs when VCC = 0 V, preventing back-drive current during partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across 1.8-V, 2.5-V, and 3.3-V supply domains |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V logic without external level shifters |
| tpd (max) | 5.5 ns at VCC = 3.3 V - Supports >100 MHz bus timing in high-speed digital interfaces |
| IOL/IOH | ±12 mA per output at VCC = 3.3 V - Drives moderate capacitive loads (e.g., 10–15 pF traces + IC inputs) |
| Output Series Resistance | 26 Ω (typical) - Reduces signal ringing and EMI without requiring discrete series resistors |
| Ioff | ±10 μA max at VCC = 0 V - Enables hot-plug capability and safe partial-power-down operation |
| ESD Rating | 2000-V HBM, 1000-V CDM - Meets industrial-grade robustness requirements per JESD22 |
Pinout & Package
SN74LVC2244ADBRG4 uses a 20-pin SSOP (DB) package with 7.20 mm × 5.30 mm body size and 0.65-mm lead pitch. Pin 1 is located at the top-left corner (Q1 quadrant), with standard SSOP pin numbering and orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable inputs controlling first and second 4-bit sections independently |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Noninverting input terminals for eight buffer channels |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | 3-state noninverting output terminals with integrated 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 |
|---|---|
| Wide VCC range (1.65–3.6 V) | Supports interoperability across 1.8-V microcontrollers, 2.5-V FPGAs, and 3.3-V ASICs without voltage translation ICs |
| 5.5-V tolerant inputs | Eliminates need for external clamping diodes or level translators when interfacing with 5-V sensors or legacy peripherals |
| Integrated 26-Ω output series resistors | Reduces PCB component count and layout complexity by suppressing transmission-line reflections on short traces |
| Ioff protection | Prevents damaging current flow during board hot-swap or system power sequencing where VCC ramps independently |
| Low ground bounce (VOLP < 0.8 V) | Maintains stable reference for adjacent logic in dense digital layouts with shared ground planes |
Applications
| Industrial PLC I/O Modules | Test Equipment Digital Pattern Generators |
|---|---|
Use Scenario: Driving multiple isolated relay drivers or analog multiplexer control lines from a 3.3-V FPGA I/O bank. IC Role / Device Role / Timing Role: Level-translating buffer providing 5.5-V tolerant inputs and 3.3-V compatible outputs with precise 3-state timing control. Use Value: Enables direct FPGA-to-relay interface without external level shifters or series resistors, reducing BOM cost and layout area by ~30% per channel. |
Use Scenario: Generating synchronized 8-bit parallel stimulus patterns for DUT testing under 100-MHz clock domains. IC Role / Device Role / Timing Role: High-speed octal buffer delivering matched tpd (≤5.5 ns) and low skew across all eight outputs. Use Value: Ensures deterministic setup/hold margins for DUT inputs, eliminating pattern corruption caused by inter-channel skew exceeding 1 ns. |
| Medical Patient Monitor Data Acquisition | Automotive Body Control Module Interfaces |
Use Scenario: Isolating ADC control signals and status lines between a 1.8-V microcontroller and multi-channel analog front-end ICs. IC Role / Device Role / Timing Role: Low-voltage buffer with Ioff enabling safe power sequencing during sleep/wake transitions. Use Value: Prevents back-current injection into powered-down ADC sections, avoiding latch-up risk and ensuring FDA-compliant fault tolerance. |
Use Scenario: Interfacing a 3.3-V automotive MCU with 5-V CAN transceiver control pins and sensor biasing circuits. IC Role / Device Role / Timing Role: Mixed-voltage translator supporting ISO 11898-2 compliant 5-V logic levels while operating from 3.3-V supply. Use Value: Eliminates need for discrete voltage translators in BCM subassemblies, improving ASIL-B functional safety compliance via reduced component failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244A | No integrated 26-Ω output resistors; requires external series termination for EMI control | Suitable for lower-speed (<50 MHz) or low-capacitance (<5 pF) routing where ringing is not critical | Select when cost sensitivity outweighs layout simplicity and EMI performance requirements |
| SN74LVCH244A | Includes bus-hold circuitry on inputs; higher ICC (10 μA vs. 5 μA typical) and slightly slower tpd (6.5 ns) | Better suited for systems with floating or unterminated control lines where input state retention is required | Choose when driving long, unterminated traces or unconnected switches where bus-hold prevents metastability |
Compared with SN74LVC2244ADBRG4, SN74LVC244A lacks integrated output termination-increasing layout effort and EMI risk-while SN74LVCH244A adds bus-hold but trades off speed and quiescent current, making SN74LVC2244ADBRG4 optimal for high-fidelity, low-component-count 3.3-V/5-V interface designs.
Availability
SN74LVC2244ADBRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical data acquisition subsystems, and automotive body control interfaces requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SN74LVC2244ADBRG4 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 over 50 years of innovation in high-reliability interface and power management ICs.
The SN74LVC2244ADBRG4 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage interfacing in industrial automation, test equipment, and medical electronics where signal integrity and power efficiency are critical.
FAQ
What is the maximum operating temperature range for the SN74LVC2244ADBRG4?
The SN74LVC2244ADBRG4 is rated for operation from –40°C to +85°C ambient temperature, as confirmed in the Recommended Operating Conditions table of the official datasheet (SCAS572L, Rev. L). This range applies to all electrical specifications including tpd, VOH/VOL, and Ioff, and is validated across the SSOP (DB) package variant used in SN74LVC2244ADBRG4.
Does the SN74LVC2244ADBRG4 support 5-V input signals while powered from a 3.3-V supply?
Yes, the SN74LVC2244ADBRG4 supports input voltages up to 5.5 V regardless of VCC level, including when VCC = 3.3 V. This is explicitly stated in the Features list and verified in Section 7.3 (Recommended Operating Conditions) of the datasheet, enabling direct connection to 5-V sensors or legacy peripherals without external level-shifting circuitry.
What is the purpose of the 26-Ω series resistance integrated into each output of the SN74LVC2244ADBRG4?
The 26-Ω series resistance integrated into each output of the SN74LVC2244ADBRG4 reduces signal overshoot and undershoot by damping transmission-line reflections on PCB traces. As documented in the Features section and Detailed Description (Section 9.1), this eliminates the need for external series resistors in typical point-to-point or lightly loaded bus configurations, simplifying layout and reducing component count.
How does the Ioff feature function in the SN74LVC2244ADBRG4 during power-down sequences?
The Ioff feature in the SN74LVC2244ADBRG4 disables current paths between inputs and outputs when VCC = 0 V, limiting leakage to ±10 μA maximum. As described in Section 9.3 and Application Information (Section 10.1), this prevents damaging back-drive current from live 5-V buses into a powered-down system, enabling safe hot-insertion and partial-power-down operation in modular industrial hardware.
What is the pin 1 marking and physical orientation for the SN74LVC2244ADBRG4 SSOP package?
The SN74LVC2244ADBRG4 uses an SSOP (DB) package with pin 1 located in Quadrant Q1 of the tape-and-reel carrier, identified by a small beveled corner or dot on the package top surface. The device has standard SSOP pin numbering: pin 1 is top-left, pin 10 is bottom-left (GND), pin 11 is bottom-middle (2A1), and pin 20 is top-right (VCC), matching the DB package drawing in TI's Mechanical Data (SLMA001).
SN74LVC2244ADBRG4 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:
- 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-SSOP
SN74LVC2244ADBRG4 FAQ
1.How can I place an order for SN74LVC2244ADBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244ADBRG4 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 SN74LVC2244ADBRG4 reliable?
The price and inventory of SN74LVC2244ADBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244ADBRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC2244ADBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244ADBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244ADBRG4?
SN74LVC2244ADBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244ADBRG4 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 SN74LVC2244ADBRG4?
For technical support, including SN74LVC2244ADBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244ADBRG4 requirements.
6.How does Aetrix verify that SN74LVC2244ADBRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244ADBRG4 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 SN74LVC2244ADBRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC2244ADBRG4?
All SN74LVC2244ADBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244ADBRG4, 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 SN74LVC2244ADBRG4 part is unused and in its original packaging.
Return procedure for SN74LVC2244ADBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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