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Texas Instruments SN74LVC244ADBRE4
- Part No.:
- SN74LVC244ADBRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC244ADBRE4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,587
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Product details
Overview
SN74LVC244ADBRE4 from Texas Instruments is an octal 3-state buffer/driver IC designed for asynchronous bus interfacing in 1.65V–3.6V systems. It provides two independent 4-bit banks (1A/1Y and 2A/2Y), each controlled by its own output-enable pin (1OE, 2OE), delivers ≤5.9ns propagation delay at 3.3V, supports 5.5V-tolerant inputs, and operates across –40°C to +125°C - enabling use in LED displays, network switches, and industrial I/O expanders.
For engineers reviewing the SN74LVC244ADBRE4 datasheet, SN74LVC244ADBRE4 pinout, SN74LVC244ADBRE4 application, or SN74LVC244ADBRE4 equivalent, key selection criteria include VCC range compatibility (1.65–3.6V), 5.5V input tolerance, dual independent 3-state control, tpd ≤5.9ns @3.3V, and thermal performance in the SSOP-20 (DB) package.
Technical Context
The SN74LVC244ADBRE4 implements two independent 4-bit noninverting buffer banks with CMOS 3-state outputs. Each bank features dedicated output-enable logic (active-low), enabling simultaneous or selective control of four outputs per group without contention.
Its Ioff circuitry ensures live insertion capability and partial-power-down protection by disabling all outputs when VCC = 0V, while the balanced drive strength (±24mA @3V) and 5.5V-tolerant inputs support mixed-voltage signal translation between 3.3V domains and legacy 5V peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into modern low-voltage digital systems without level-shifting. |
| Input Voltage Tolerance | Up to 5.5V - allows safe connection to 5V logic signals while powered from 3.3V or lower supplies. |
| Max Propagation Delay | 5.9ns at 3.3V - supports high-speed data transfer on buses up to ~170MHz clock-equivalent rates. |
| Output Drive Strength | ±24mA @3V - sufficient to drive moderate capacitive loads (e.g., >10cm PCB traces or multiple CMOS inputs). |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure environments. |
| Ioff Current | ±20µA max - prevents back-driving and leakage during power sequencing or hot-swap events. |
| ESD Rating | ±2000V HBM - meets standard industrial handling requirements without additional protection circuitry. |
Pinout & Package
The SN74LVC244ADBRE4 is packaged in a 20-pin SSOP (DB) with 0.65mm pitch, body size 7.2mm × 5.30mm, and total footprint 7.2mm × 7.8mm. This surface-mount package supports automated assembly and offers improved thermal resistance (RθJA = 121.7°C/W) versus PDIP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight independent logic inputs grouped as two 4-bit channels; accept 0–5.5V regardless of VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state CMOS outputs; each bank (1Y/2Y) enters high-Z when respective OE is high. |
| 1OE, 2OE | Input | Active-low enable controls for Bank 1 and Bank 2; both must be low for output assertion. |
| VCC | Power | Primary supply for logic core and output drivers; range 1.65–3.6V. |
| GND | Ground | Reference return path for all signals and power; requires low-impedance PCB plane connection. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Enables direct interface between 3.3V system logic and 5V peripherals without external translators. |
| Ioff partial-power-down protection | Prevents current backflow and bus contention when VCC is off, supporting hot-plug I/O expansion cards. |
| Balanced CMOS 3-state outputs | Provides matched sourcing/sinking capability (±24mA) for clean signal edges and reduced ground bounce. |
| Ultra-low dynamic power | Typical ICC = 1µA at 3.6V - minimizes quiescent power in always-on industrial monitoring nodes. |
| Latch-up immunity | Exceeds 250mA per JESD17 - ensures robustness against transient overcurrent events in noisy environments. |
Applications
| LED Display Driver | Network Switch Interface |
|---|---|
Use Scenario: Driving column/row lines in multiplexed LED signage with long trace runs and variable load capacitance. IC Role / Device Role / Timing Role: Octal buffer providing high-current, low-delay signal amplification and isolation between FPGA controller and LED matrix. Use Value: 5.9ns tpd and ±24mA drive ensure sharp edge integrity across 10+ cm PCB traces, reducing flicker and ghosting. |
Use Scenario: Isolating and buffering control signals between switch fabric ASIC and management microcontroller. IC Role / Device Role / Timing Role: Dual-bank 3-state buffer enabling bidirectional configuration register access without bus contention. Use Value: Independent 1OE/2OE pins allow time-multiplexed read/write cycles on shared address/data lines. |
| Industrial I/O Expander | Motor Driver Control Interface |
Use Scenario: Extending GPIO count on PLC modules to manage discrete sensors and actuators across DIN-rail enclosures. IC Role / Device Role / Timing Role: Level-translating buffer interfacing 3.3V MCU with 5V-rated optocouplers and relay drivers. Use Value: 5.5V input tolerance eliminates need for discrete level shifters, reducing BOM cost and board area. |
Use Scenario: Conditioning PWM and direction signals sent from MCU to H-bridge gate drivers in servo drives. IC Role / Device Role / Timing Role: Signal conditioner adding drive strength and noise margin to timing-critical motor control paths. Use Value: Low ground bounce (<0.8V VOLP) prevents false triggering of sensitive gate drivers during fast switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWRE4 | TSSOP-20 package (6.5mm × 6.4mm); RθJA = 120.3°C/W; identical electrical specs. | Better suited for space-constrained layouts where SSOP height clearance is limited. | Select when board real estate or component stacking height is critical; same pinout and function. |
| 74LVC244ABQ,118 | DSO-20 package (7.5mm × 8.8mm); rated –40°C to +125°C; identical logic and timing. | Preferred for high-reliability industrial applications requiring JEDEC-standard DSO qualification. | Choose for extended temperature validation or when DSO mechanical robustness is required over SSOP. |
Compared with SN74LVC244ADBRE4, the PWRE4 variant offers identical functionality in a slightly smaller footprint but higher thermal resistance, while the NXP 74LVC244ABQ provides equivalent performance in a JEDEC-standard DSO package with broader long-term availability assurance in harsh environments.
Availability
SN74LVC244ADBRE4 is available at Aetrix Electronics and suitable for LED displays, network switches, and industrial I/O expanders requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for SN74LVC244ADBRE4 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 high-reliability interface ICs.
The SN74LVC244A family was developed to deliver robust, low-voltage 3-state buffering for industrial, telecom, and computing infrastructure - emphasizing voltage translation, hot-swap readiness, and signal integrity across wide temperature ranges.
FAQ
What is the maximum operating voltage for SN74LVC244ADBRE4 inputs?
The SN74LVC244ADBRE4 inputs tolerate up to 5.5V regardless of VCC level, enabling direct connection to 5V logic signals while operating from 1.65V–3.6V supplies. This feature eliminates external level shifters in mixed-voltage systems and is validated across the full –40°C to +125°C temperature range per TI's datasheet Section 5.3.
Does SN74LVC244ADBRE4 support hot-swap or live insertion?
Yes, SN74LVC244ADBRE4 supports live insertion via its Ioff circuitry, which disables all outputs and limits leakage to ±20µA when VCC = 0V. This prevents back-driving and bus contention during card replacement in modular systems like telecom line cards or industrial PLC I/O modules, as confirmed in Section 7.3.2 of the official datasheet.
What is the propagation delay of SN74LVC244ADBRE4 at 3.3V?
The maximum propagation delay (tpd) of SN74LVC244ADBRE4 is 5.9ns at VCC = 3.3V ±0.3V and TA = 25°C, with typical values as low as 3.9ns. This specification applies to both rising and falling transitions and is guaranteed across –40°C to +125°C per Section 5.6 of the TI datasheet.
Can SN74LVC244ADBRE4 drive multiple CMOS loads simultaneously?
Yes, SN74LVC244ADBRE4 can drive multiple CMOS loads: each output sources/sinks up to ±24mA at 3V, and the device's low output impedance and balanced drive minimize signal degradation. Its 5.5pF typical output capacitance (Co) and 44pF power dissipation capacitance (Cpd) support reliable fan-out to ≥10 standard CMOS inputs at 3.3V, as specified in Sections 5.5 and 5.7.
What package type is used for SN74LVC244ADBRE4?
SN74LVC244ADBRE4 uses a 20-pin SSOP (Shrink Small Outline Package) designated DB, with dimensions 7.2mm × 7.8mm (body: 7.2mm × 5.30mm) and 0.65mm lead pitch. This RoHS-compliant, surface-mount package is optimized for automated assembly and offers validated thermal performance (RθJA = 121.7°C/W) per TI's Mechanical, Packaging, and Orderable Information.
SN74LVC244ADBRE4 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74LVC244ADBRE4 FAQ
1.How can I place an order for SN74LVC244ADBRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244ADBRE4 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 SN74LVC244ADBRE4 reliable?
The price and inventory of SN74LVC244ADBRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244ADBRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC244ADBRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC244ADBRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC244ADBRE4?
SN74LVC244ADBRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244ADBRE4 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 SN74LVC244ADBRE4?
For technical support, including SN74LVC244ADBRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244ADBRE4 requirements.
6.How does Aetrix verify that SN74LVC244ADBRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC244ADBRE4 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 SN74LVC244ADBRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC244ADBRE4?
All SN74LVC244ADBRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244ADBRE4, 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 SN74LVC244ADBRE4 part is unused and in its original packaging.
Return procedure for SN74LVC244ADBRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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