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Texas Instruments SN74LVC244APWRG3
- Part No.:
- SN74LVC244APWRG3
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC244APWRG3.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,728
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Product details
Overview
SN74LVC244APWRG3 from Texas Instruments is an octal 3-state buffer/driver IC designed for asynchronous bus interfacing in 1.65V–3.6V systems. It features dual 4-bit banks, 5.9ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and Ioff support for live insertion-used in server backplanes and telecom infrastructure signal routing.
For engineers reviewing the SN74LVC244APWRG3 datasheet, SN74LVC244APWRG3 pinout, SN74LVC244APWRG3 application, or SN74LVC244APWRG3 equivalent, this page delivers verified electrical specs, TSSOP-20 package details, real-world timing behavior, and validated alternative options for mixed-voltage I/O expansion and bus isolation.
Technical Context
The SN74LVC244APWRG3 implements two independent 4-bit noninverting buffers, each controlled by a dedicated output-enable (OE) input. Its CMOS architecture supports bidirectional voltage translation: 5.5V inputs are safely clamped and level-shifted to VCC-referenced outputs without external components.
Each bank operates with balanced drive strength (±24mA at 3V), low ground bounce (<0.8V typical VOLP), and robust ESD protection (±2000V HBM). The device enters high-impedance state on OE high and fully disables outputs during power-down via Ioff circuitry, preventing back-drive and leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables direct interface with 1.8V/2.5V/3.3V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5V - Allows connection to legacy 5V buses while powered from 3.3V supply. |
| Max Propagation Delay | 5.9ns at 3.3V - Supports >100MHz data rates on short PCB traces with clean edge integrity. |
| Output Drive Strength | ±24mA at 3V - Sustains reliable signaling into 50Ω transmission lines or multiple CMOS loads. |
| Operating Temperature | –40°C to +125°C - Qualified for industrial and telecom infrastructure environments. |
| Ioff Current | ±10µA max at 5.5V - Ensures safe hot-plug operation and prevents power rail contention during partial power-down. |
| ESD Rating | ±2000V HBM - Meets JEDEC JS-001 for robust handling in automated assembly and field service. |
Pinout & Package
TSSOP-20 (PW) package: 6.50mm × 6.4mm body, 0.65mm pitch, exposed thermal pad (no internal connection), RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input (8 total) | Noninverting data inputs for two independent 4-bit banks; accept 0–5.5V regardless of VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Output (8 total) | 3-state buffered outputs; driven low/high when corresponding OE is low; high-Z when OE is high. |
| 1OE, 2OE | Input (2) | Active-low enable controls for Bank 1 and Bank 2; both must be low for output assertion. |
| VCC | Power | Primary supply (1.65–3.6V); powers all logic and output stages; requires local 0.1µF bypass. |
| GND | Ground | Reference return path for all signals and power; connects to system ground plane under thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Enables 5V inputs to drive 3.3V outputs directly-eliminates discrete level translators in I/O expander designs. |
| Ioff partial-power-down protection | Blocks current flow between powered and unpowered sections-critical for hot-swap server modules and modular PLCs. |
| Low ground bounce (VOLP) | <0.8V typical at 3.3V - Reduces noise coupling into adjacent analog or clock traces on dense PCBs. |
| Ultra-fast enable/disable timing | 7.6ns max tdis and 9.4ns max ten at 3.3V - Supports dynamic bus arbitration with minimal latency overhead. |
| Latch-up immunity | >250mA per JESD17 - Guarantees robustness against transient overvoltage events in noisy industrial environments. |
Applications
| Server Backplane Interface | LED Display Column Driver |
|---|---|
|
Use Scenario: Isolating control signals between CPU module and PCIe switch fabric on multi-slot server motherboards. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling 3.3V controller to drive 5V-tolerant switch configuration registers without voltage conflict. Use Value: Eliminates need for external level shifters while maintaining <6ns propagation delay for timing-critical link training sequences. |
Use Scenario: Driving 8 parallel LED column lines in a 16×64 dot-matrix display with multiplexed scanning. IC Role / Device Role / Timing Role: High-current 3-state driver providing ±24mA sink/source per column to achieve uniform brightness at 1kHz refresh. Use Value: Single-chip solution replaces eight discrete transistors; Ioff prevents ghosting during blanking intervals. |
| Network Switch ASIC Interface | Industrial I/O Expander |
|
Use Scenario: Buffering GPIO status signals from management MCU to 10GbE PHY registers across long PCB traces (>10cm). IC Role / Device Role / Timing Role: Signal integrity enhancer using controlled edge rate and source termination compatibility. Use Value: 5.9ns tpd ensures setup/hold margins are preserved; 3-state capability allows shared bus arbitration with other peripherals. |
Use Scenario: Extending microcontroller GPIO count to drive relays, sensors, and indicator LEDs in programmable logic controllers. IC Role / Device Role / Timing Role: General-purpose digital buffer with 5.5V input tolerance for interfacing with legacy 5V sensor outputs. Use Value: Simplifies BOM by consolidating eight discrete buffers; wide temperature range supports cabinet-mounted operation. |
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 |
|---|---|---|---|
| SN74LVCH244A | Includes bus-hold circuitry on all inputs; otherwise identical VCC range, drive, and pinout. | Better suited for floating-input scenarios (e.g., unconnected test points); adds ~1.5pF input capacitance. | Select when input stability without external pull-ups is required; same PCB layout. |
| 74LVC244ABQ | Same logic function and specs, but in 20-pin DHVQFN (3.5mm × 4.5mm) with wettable flanks. | Higher-density placement and improved thermal performance (RθJA = 82.8°C/W vs. 120.3°C/W for TSSOP). | Select for space-constrained or thermally demanding applications; requires rework of footprint and stencil. |
Compared with SN74LVC244APWRG3, SN74LVCH244A adds bus-hold for input robustness at no layout cost, while 74LVC244ABQ offers superior thermal dissipation in a smaller footprint-both require no functional redesign but differ in layout and reliability trade-offs.
Availability
SN74LVC244APWRG3 is available at Aetrix Electronics and suitable for server backplanes, LED display drivers, and network switch interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SN74LVC244APWRG3 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 ICs.
The SN74LVC244APWRG3 belongs to TI's LVC logic family-designed specifically for low-voltage, high-speed, mixed-signal interfacing in computing, communications, and industrial control systems.
FAQ
What is the maximum input voltage rating for SN74LVC244APWRG3?
The SN74LVC244APWRG3 accepts input voltages up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic while operating from 1.65V–3.6V supplies. This overvoltage tolerance is implemented via internal clamp diodes and is specified in the Absolute Maximum Ratings table. Exceeding 5.5V risks permanent damage even if current is limited.
Does SN74LVC244APWRG3 support hot-swap or live-insertion applications?
Yes, SN74LVC244APWRG3 supports live insertion through its Ioff feature: when VCC = 0V, all outputs enter high-impedance state and leakage remains below ±10µA, preventing back-drive into powered circuitry. This behavior is tested per JESD78 and documented in Section 5.5 Electrical Characteristics-making it suitable for modular telecom and server chassis designs.
What is the recommended bypass capacitor for SN74LVC244APWRG3?
A 0.1µF ceramic capacitor placed as close as possible to the VCC pin (Pin 20) and GND (Pin 10) is recommended for SN74LVC244APWRG3. TI's layout guidelines specify low-inductance placement with short, wide traces to minimize switching noise. For systems with broadband noise, paralleling with a 1µF capacitor improves suppression across frequency bands.
Can SN74LVC244APWRG3 drive transmission lines longer than 12 cm?
Yes, but with design mitigation: SN74LVC244APWRG3 can drive traces >12 cm when source-terminated with a series damping resistor (e.g., 22Ω–33Ω) near the output pin. TI's Layout Guidelines (Section 8.4.1) confirm this approach suppresses ringing caused by fast edges (sub-6ns tpd) into unterminated lines-verified in Figure 8-2 simulation curves.
Is SN74LVC244APWRG3 pin-compatible with older SN74LVC244A variants?
Yes, SN74LVC244APWRG3 shares identical pinout, functionality, and timing with all SN74LVC244A family members in TSSOP-20 (PW) packaging-including SN74LVC244APW and SN74LVC244APWR. The "G3" suffix denotes TI's green packaging standard (lead-free, RoHS-compliant), with no electrical or mechanical differences affecting drop-in replacement.
SN74LVC244APWRG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 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-TSSOP
SN74LVC244APWRG3 FAQ
1.How can I place an order for SN74LVC244APWRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244APWRG3 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 SN74LVC244APWRG3 reliable?
The price and inventory of SN74LVC244APWRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244APWRG3 is usually 5 days.
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Once your SN74LVC244APWRG3 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 SN74LVC244APWRG3?
For technical support, including SN74LVC244APWRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244APWRG3 requirements.
6.How does Aetrix verify that SN74LVC244APWRG3 is sourced from the original manufacturer or authorized distributors?
All SN74LVC244APWRG3 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 SN74LVC244APWRG3 meets industry standards.
7.What is the process for return or replacement of SN74LVC244APWRG3?
All SN74LVC244APWRG3 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244APWRG3, 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 SN74LVC244APWRG3 part is unused and in its original packaging.
Return procedure for SN74LVC244APWRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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