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Texas Instruments SN74LVC2244ANSR
- Part No.:
- SN74LVC2244ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC2244ANSR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,648
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Product details
Overview
SN74LVC2244ANSR 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), 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 industrial control backplanes.
For engineers reviewing the SN74LVC2244ANSR datasheet, SN74LVC2244ANSR pinout, SN74LVC2244ANSR application, or SN74LVC2244ANSR equivalent, key selection criteria include its Ioff-enabled live insertion capability, mixed-voltage translation (5 V input → 3.3 V output), guaranteed 125°C operation, and SOP-20 package compatibility with legacy PCB layouts requiring minimal thermal derating.
Technical Context
This device implements dual 4-bit noninverting buffers with independent 3-state control per group. Each channel operates with rail-to-rail input tolerance up to 5.5 V while powered from 1.65–3.6 V VCC, enabling seamless level translation without external components. The Ioff feature actively disables all outputs when VCC = 0 V, preventing back-drive current during partial power-down sequences.
Output drivers incorporate on-die 26-Ω series termination to suppress overshoot/undershoot-eliminating need for external resistors in point-to-point routing. Propagation delay (tpd) remains ≤5.5 ns at 3.3 V across –40°C to 125°C, with enable/disable times (ten/tdis) tightly matched to support synchronized bus gating in real-time 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 (1.8 V) and standard 3.3 V logic rails without voltage translation ICs. |
| Input Voltage Tolerance | 0 V to 5.5 V - Allows direct connection to 5 V microcontrollers or legacy peripherals without clamping diodes or level shifters. |
| tpd (3.3 V) | ≤5.5 ns - Supports >100 MHz data rates in buffered address/data paths with deterministic timing margins. |
| Output Drive | ±12 mA per output - Sinks sufficient current to drive 50 Ω transmission lines or multiple CMOS inputs without fanout limitation. |
| Ioff Current | ±10 μA max at 5.5 V - Ensures safe hot-plug operation and prevents destructive back-current flow during system power sequencing. |
| ESD Rating | 2000 V HBM - Meets industrial equipment immunity requirements without additional protection circuitry. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive modules and uncooled industrial PLC I/O cards. |
Pinout & Package
SOP-20 package (NS), body size 12.80 mm × 7.50 mm, 1.27 mm pitch, plastic body with matte finish. Pin 1 located at top-left corner with notch marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - Independently gate Group 1 (pins 2,4,6,8 → 18,16,14,12) and Group 2 (pins 11,13,15,17 → 9,7,5,3). |
| 2,4,6,8 | 1A1–1A4 | Group 1 inputs - Accept 0–5.5 V signals regardless of VCC; no level-shifting required for mixed-voltage systems. |
| 11,13,15,17 | 2A1–2A4 | Group 2 inputs - Electrically isolated from Group 1; supports dual-bus isolation in redundant controller designs. |
| 18,16,14,12 | 1Y1–1Y4 | Group 1 outputs - Internally series-terminated to 26 Ω; reduces signal integrity issues on unterminated traces. |
| 9,7,5,3 | 2Y1–2Y4 | Group 2 outputs - Matched drive strength and timing to Group 1; enables symmetrical bus loading in multi-drop configurations. |
| 10 | GND | Ground reference - Dedicated ground pin minimizes switching noise coupling between groups. |
| 20 | VCC | Power supply - Single 1.65–3.6 V rail powers both groups; bypass capacitor required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage interface | 5.5 V-tolerant inputs operate reliably with 1.65–3.6 V VCC - eliminates discrete level translators in 3.3 V/5 V hybrid systems. |
| Integrated output termination | 26-Ω series resistors per output - removes need for 8 external resistors, saving PCB area and reducing BOM count. |
| Live-insertion support | Ioff limits leakage to ±10 μA when VCC = 0 V - enables safe field-replacement of hot-swap I/O modules without system shutdown. |
| High-speed timing | 5.5 ns tpd at 3.3 V with <1 ns skew between outputs - maintains setup/hold margins in synchronous parallel bus applications. |
| Ruggedness | 250 mA latch-up immunity per JESD17 and 2000 V HBM ESD rating - withstands industrial electrostatic environments without protection diodes. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Buffering sensor data and actuator commands between MCU and distributed I/O cards over 20 cm backplane traces. IC Role / Device Role / Timing Role: Octal noninverting buffer with independent 3-state control isolates fault domains and enables dynamic bus arbitration. Use Value: 26-Ω integrated termination suppresses reflections on unterminated FR-4 traces, eliminating signal integrity debugging time. |
Use Scenario: Translating 5 V CAN transceiver status signals to 3.3 V microcontroller GPIO pins in door module ECUs. IC Role / Device Role / Timing Role: Level translator with Ioff protection ensures no backfeed occurs during battery disconnect events. Use Value: 5.5 V input tolerance allows direct connection to CAN TX/RX lines without external clamping, reducing component count by 4 diodes. |
| Test Equipment Digital Pattern Generator | Network Switch Management Interface |
Use Scenario: Driving 8-bit parallel test vectors into DUTs with variable load capacitance (10–50 pF) at 50 MHz. IC Role / Device Role / Timing Role: High-drive buffer with matched tpd guarantees simultaneous edge delivery across all 8 bits. Use Value: ±12 mA output current sustains clean logic levels into heavy capacitive loads, avoiding waveform degradation. |
Use Scenario: Isolating management CPU GPIOs from hot-pluggable SFP+ module presence detection lines. IC Role / Device Role / Timing Role: 3-state buffer with Ioff enables safe insertion/removal of optical modules while switch remains powered. Use Value: Ioff leakage <10 μA prevents false detection during hot-swap, eliminating firmware workarounds for transient glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | TSSOP-20 package (6.5 mm × 4.4 mm); 10% smaller footprint but higher thermal resistance (RθJA = 102.5°C/W vs 74.7°C/W). | Better suited for space-constrained consumer electronics; less optimal for thermally demanding industrial enclosures. | Choose SN74LVC2244ANSR for legacy SOP-20 board compatibility and superior thermal performance in convection-cooled systems. |
| 74LVC244BQ | NXP variant with identical electrical specs but different MSL rating (Level-1 vs Level-1) and RoHS-compliant matte tin finish only. | No functional difference; qualified for same automotive AEC-Q100 Grade 2 applications but lacks TI's extended temperature validation. | Prefer SN74LVC2244ANSR when full –40°C to +125°C characterization and TI's long-term supply commitment are required. |
Compared with SN74LVC244APWR and 74LVC244BQ, SN74LVC2244ANSR offers the lowest junction-to-ambient thermal resistance in SOP-20, verified 125°C operation across all parameters, and TI's 10-year product longevity guarantee-making it optimal for industrial and automotive applications where thermal margin and supply chain stability are critical.
Availability
SN74LVC2244ANSR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, automated test equipment, and network switch management interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC2244ANSR 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 decades of expertise in industrial-grade interface ICs and automotive-qualified components.
The SN74LVC2244ANSR belongs to TI's LVC logic family, engineered specifically for robust mixed-voltage interfacing in harsh environments-prioritizing Ioff protection, wide VCC range, and guaranteed timing across automotive and industrial temperature grades.
FAQ
What is the maximum operating temperature for SN74LVC2244ANSR?
The SN74LVC2244ANSR is fully specified from –40°C to +125°C ambient temperature. All electrical characteristics-including propagation delay, output drive, and Ioff leakage-are guaranteed across this full range, making SN74LVC2244ANSR suitable for under-hood automotive applications and uncooled industrial controllers without thermal derating.
Does SN74LVC2244ANSR support 5 V inputs while powered from 3.3 V?
Yes, SN74LVC2244ANSR accepts input voltages up to 5.5 V regardless of VCC setting (1.65–3.6 V). This allows direct connection to 5 V microcontrollers or legacy peripherals without external level-shifting circuitry-verified in the Recommended Operating Conditions table where VI = 0 to 5.5 V is explicitly permitted.
What is the purpose of the 26-Ω series resistor integrated in SN74LVC2244ANSR outputs?
The 26-Ω series resistor in each SN74LVC2244ANSR output is designed to dampen signal reflections on PCB traces, reducing overshoot and undershoot without requiring external termination. This feature simplifies layout for point-to-point connections and eliminates eight discrete resistors, directly lowering BOM cost and assembly complexity.
Can SN74LVC2244ANSR be used in hot-swap applications?
Yes, SN74LVC2244ANSR includes Ioff circuitry that limits input/output leakage to ±10 μA when VCC = 0 V. This prevents damaging back-current flow during live insertion or removal of modules, enabling safe use in hot-swap I/O carriers and modular test equipment where SN74LVC2244ANSR remains electrically isolated during power transitions.
What package type does SN74LVC2244ANSR use, and is it compatible with standard SOP-20 footprints?
SN74LVC2244ANSR uses the SOP-20 (NS) package with 12.80 mm × 7.50 mm body size and 1.27 mm lead pitch. It is fully compatible with industry-standard SOP-20 footprints, including IPC-7351B SOIC-20 land patterns, and supports reflow soldering per JEDEC Level-1 moisture sensitivity classification.
SN74LVC2244ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (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-SO
SN74LVC2244ANSR FAQ
1.How can I place an order for SN74LVC2244ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244ANSR 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 SN74LVC2244ANSR reliable?
The price and inventory of SN74LVC2244ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244ANSR is usually 5 days.
3.What payment methods are accepted for SN74LVC2244ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244ANSR?
SN74LVC2244ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244ANSR 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 SN74LVC2244ANSR?
For technical support, including SN74LVC2244ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244ANSR requirements.
6.How does Aetrix verify that SN74LVC2244ANSR is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244ANSR 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 SN74LVC2244ANSR meets industry standards.
7.What is the process for return or replacement of SN74LVC2244ANSR?
All SN74LVC2244ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244ANSR, 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 SN74LVC2244ANSR part is unused and in its original packaging.
Return procedure for SN74LVC2244ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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