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Texas Instruments SN74ALVC244DWG4
- Part No.:
- SN74ALVC244DWG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVC244DWG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
SN74ALVC244DWG4 from Texas Instruments is an octal buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features two independent 4-bit channels, each with separate output-enable (OE) inputs, ±24-mA drive strength at 3.3 V, 2.8-ns max propagation delay, and JESD 22-compliant ESD protection. It is used in bidirectional bus interfacing between mixed-voltage logic domains in industrial control backplanes.
For engineers reviewing the SN74ALVC244DWG4 datasheet, SN74ALVC244DWG4 pinout, SN74ALVC244DWG4 application, or SN74ALVC244DWG4 equivalent, key selection criteria include 3-state output timing symmetry, rail-to-rail input compatibility across 1.65–3.6 V, thermal performance in SOIC-20 (DW) package, and compatibility with legacy ALVC-family board layouts requiring no PCB changes.
Technical Context
The SN74ALVC244DWG4 implements dual 4-bit noninverting buffers with active-low 3-state control per channel. Each OE input independently enables or disables its associated four Y outputs, allowing precise bus segment isolation without affecting the other channel.
Its CMOS design ensures low ICC (10 µA max) and low dynamic power dissipation (26 pF typical Cpd per buffer at 3.3 V), while maintaining full logic-level translation capability - inputs recognize valid HIGH/LOW thresholds across the entire 1.65–3.6 V supply range, and outputs swing rail-to-rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports interoperability between 1.8-V, 2.5-V, and 3.3-V logic systems without level shifters |
| tpd Max | 2.8 ns at 3.3 V - enables high-speed data transfer in memory address latching and peripheral I/O expansion |
| IOH/IOL | ±24 mA at 3 V - drives heavy capacitive loads (e.g., >30-pF buses) with minimal signal degradation |
| 3-State Leakage | ±10 µA at 3.6 V - ensures robust high-impedance state integrity during system sleep or hot-swap events |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for factory automation interfaces |
| Operating Temp | −40°C to +85°C - qualified for extended-temperature deployment in embedded controllers and motor drives |
Pinout & Package
SN74ALVC244DWG4 uses a 20-pin SOIC (DW) package with 1.27-mm pitch, 7.6-mm body width, and 2.65-mm max height. Pin 1 is located at the top-left corner adjacent to the index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of Channel 1 (pins 2–5, 19–16) and Channel 2 (pins 11–14, 8–1); pull-up required for power-up high-Z safety |
| 1A1–1A4, 2A1–2A4 | Data inputs | Noninverting inputs for respective 4-bit channels; accept 1.65–3.6 V logic levels regardless of VCC |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | Buffered, rail-to-rail outputs; enter high-impedance when OE = HIGH; drive ±24 mA at 3 V |
| VCC, GND | Power supply | Single-supply operation; decoupling capacitor (0.1 µF) required near pin 10 (VCC) and pin 20 (GND) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input voltage recognition | VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65 V), enabling reliable operation across mixed-supply systems |
| Matched enable/disable timing | ten = 4.5 ns, tdis = 4.2 ns at 3.3 V - minimizes bus contention windows during direction switching in half-duplex interfaces |
| Low dynamic power | Cpd = 26 pF per buffer at 3.3 V - reduces switching noise and heat generation in dense I/O expansion modules |
| Robust 3-state isolation | IOZ = ±10 µA max at 3.6 V - prevents leakage-induced false logic states on shared buses during standby |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between a 3.3-V ARM Cortex-M7 MCU and legacy 2.5-V FPGA-based I/O module in a programmable logic controller. IC Role / Device Role / Timing Role: Octal noninverting buffer with independent 3-state control per channel, providing voltage-domain bridging and bus contention prevention during firmware updates. Use Value: Eliminates need for discrete level translators; ±24-mA drive sustains signal integrity over 15-cm backplane traces with 25-pF loading. |
Use Scenario: Expanding GPIO count for sensor monitoring in a battery-powered edge node using an ultra-low-power 1.8-V microcontroller. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling time-multiplexed access to multiple analog front-end ICs via shared serial control lines. Use Value: 1.65-V minimum VCC allows direct operation from buck-converted 1.8-V rail; 2.8-ns tpd supports 10-MHz SPI clocking without timing margin loss. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
|
Use Scenario: Driving multiple 3.3-V CAN transceiver enable lines and LED status indicators from a single 3.3-V domain microcontroller in a body control unit. IC Role / Device Role / Timing Role: High-current buffer with independent OE control, delivering synchronized activation of parallel subsystems while minimizing EMI through controlled slew rate. Use Value: ±24-mA output current directly drives transceiver EN pins without external FETs; 2000-V HBM withstands assembly handling and under-hood ESD events. |
Use Scenario: Generating precise, glitch-free digital stimulus waveforms for functional testing of ASICs in automated test equipment (ATE). IC Role / Device Role / Timing Role: Low-skew, 3-state-capable buffer ensuring clean signal launch onto high-impedance DUT inputs with sub-nanosecond timing repeatability. Use Value: Matched ten/tdis (4.5 ns / 4.2 ns) guarantees deterministic bus release timing; 2.8-ns tpd enables ≤350-MHz pattern update rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | Lower drive (±24 mA only at 3.3 V; drops to ±12 mA at 2.5 V); identical pinout and logic function | Suitable for 3.3-V-only systems; not recommended for mixed-voltage 1.8/2.5-V domains due to reduced noise margin at lower VCC | Select when operating exclusively at 3.3 V and cost sensitivity outweighs voltage flexibility needs. |
| 74AVC244BQX | Higher speed (tpd = 2.1 ns at 3.3 V); requires VCC ≥ 2.3 V; different pinout (TSSOP-20 only) | Better suited for high-frequency clock distribution; incompatible with SOIC-20 footprint; lacks 1.65-V operation | Choose for timing-critical applications above 100 MHz where layout redesign is acceptable and supply is ≥2.3 V. |
Compared with SN74LVC244APWR and 74AVC244BQX, SN74ALVC244DWG4 uniquely supports full 1.65–3.6 V operation in SOIC-20, offering the broadest voltage interoperability and drop-in compatibility with legacy ALVC designs - critical for long-lifecycle industrial upgrades.
Availability
SN74ALVC244DWG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller I/O expansion, automotive body control modules, and ATE digital pattern generators requiring stable component supply across extended product lifecycles.
Supply support for SN74ALVC244DWG4 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 50 years of innovation in logic and interface solutions.
The SN74ALVC244DWG4 belongs to TI's Advanced Low-Voltage CMOS (ALVC) logic family, engineered for low-voltage mixed-signal system interfacing with emphasis on voltage translation, bus isolation, and industrial reliability.
FAQ
What is the maximum operating voltage for SN74ALVC244DWG4?
The SN74ALVC244DWG4 supports a supply voltage range of 1.65 V to 3.6 V. Absolute maximum VCC is 4.6 V, but operation beyond 3.6 V violates recommended conditions and risks parametric failure or reduced reliability. All electrical specifications - including tpd, drive strength, and logic thresholds - are guaranteed only within the 1.65–3.6 V range specified in the SCES188G datasheet.
Does SN74ALVC244DWG4 support 1.8-V logic interfacing?
Yes, SN74ALVC244DWG4 fully supports 1.8-V operation: it accepts 1.8-V inputs (VIH = 1.2 V min, VIL = 0.6 V max at VCC = 1.8 V) and delivers rail-to-rail 1.8-V outputs. Its 1.65-V minimum VCC rating makes it compatible with 1.8-V systems, and its ±24-mA drive at 1.8 V (per TI characterization data) ensures robust signal integrity on moderate-capacitance buses.
How should the OE pins be handled during power-up to ensure safe 3-state behavior?
To guarantee high-impedance outputs during power-up or power-down, both 1OE and 2OE must be held HIGH until VCC stabilizes. TI recommends tying each OE to VCC via a pull-up resistor; the minimum value depends on the driver's sink capability - for SN74ALVC244DWG4, a 10-kΩ resistor is sufficient given its 100-µA max OE input current. Avoid floating OE pins, as indeterminate states may cause bus contention.
Is SN74ALVC244DWG4 pin-compatible with older SN74ALS244 or SN74AS244 devices?
No, SN74ALVC244DWG4 is not pin-compatible with SN74ALS244 or SN74AS244. While all are octal buffers with 20-pin SOIC packages, their pinouts differ significantly: ALS/AS variants place VCC at pin 20 and GND at pin 10, whereas SN74ALVC244DWG4 places VCC at pin 10 and GND at pin 20. Substituting without board revision will cause power shorts and device damage.
What thermal considerations apply to SN74ALVC244DWG4 in continuous operation?
SN74ALVC244DWG4 in SOIC-20 (DW) package has a θJA of 58°C/W. At maximum rated 24-mA output current per pin and worst-case 3.6-V supply, total power dissipation remains below 100 mW - resulting in <6°C junction rise above ambient in still air. No heatsink is required, but proper PCB copper pour under pin 10 (VCC) and pin 20 (GND) improves thermal stability and noise immunity.
SN74ALVC244DWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74ALVC244DWG4 FAQ
1.How can I place an order for SN74ALVC244DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC244DWG4 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 SN74ALVC244DWG4 reliable?
The price and inventory of SN74ALVC244DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC244DWG4 is usually 5 days.
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SN74ALVC244DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVC244DWG4 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 SN74ALVC244DWG4?
For technical support, including SN74ALVC244DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC244DWG4 requirements.
6.How does Aetrix verify that SN74ALVC244DWG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALVC244DWG4 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 SN74ALVC244DWG4 meets industry standards.
7.What is the process for return or replacement of SN74ALVC244DWG4?
All SN74ALVC244DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC244DWG4, 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 SN74ALVC244DWG4 part is unused and in its original packaging.
Return procedure for SN74ALVC244DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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