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Texas Instruments SN74LVC244AZQNR
- Part No.:
- SN74LVC244AZQNR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFBGA
- Datasheet:
-
SN74LVC244AZQNR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,611
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Product details
Overview
SN74LVC244AZQNR from Texas Instruments is an octal noninverting 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-enabling use in server backplanes and LED display column drivers.
For engineers reviewing the SN74LVC244AZQNR datasheet, SN74LVC244AZQNR pinout, SN74LVC244AZQNR application, or SN74LVC244AZQNR equivalent, this page delivers verified package mapping (ZQN 20-pin BGA), confirmed 3-state timing parameters, mixed-voltage translation capability (5.5V→3.3V), thermal derating data, and two validated alternative parts with documented functional differences.
Technical Context
The SN74LVC244AZQNR implements two independent 4-bit noninverting buffer banks, each controlled by a dedicated output-enable input (1OE, 2OE). Its CMOS architecture supports balanced sourcing/sinking (±24mA at 3V) and operates across –40°C to +85°C ambient temperature with VCC from 1.65V to 3.6V.
Each bank's outputs enter high-impedance state when its OE is high; Ioff protection ensures <±10µA leakage when VCC = 0V, enabling partial power-down operation. Input tolerance up to 5.5V allows direct interfacing with 5V logic while powered from 3.3V or lower supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables compatibility with modern low-voltage microcontrollers and FPGAs without level shifters. |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to legacy 5V buses or sensors without external clamping. |
| tpd (max) | 5.9ns at 3.3V - Supports >100MHz bus clocking in short-trace applications like LED display row/column drivers. |
| IOL/IOH | ±24mA at VCC = 3V - Drives 50Ω transmission lines or multiple CMOS loads without external buffers. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade server, telecom, and motor control environments. |
| Ioff Leakage | ±10µA max at VCC = 0V - Prevents back-driving and enables hot-plug capability in modular backplane designs. |
| ESD Rating (HBM) | ±2000V - Meets JEDEC JS-001 for robust handling during board assembly and field service. |
Pinout & Package
ZQN package is a 20-pin ball grid array (BGA) with 4.00mm × 3.00mm body size and 0.5mm pitch. Thermal pad on underside improves heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Input | Eight independent logic inputs grouped into two 4-bit banks; accept 0–5.5V signals regardless of VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Output | Eight 3-state CMOS outputs; each bank disabled independently via OE pins to prevent bus contention. |
| 1OE, 2OE | Input | Active-low enable controls for Bank 1 and Bank 2; tie high via pull-up to ensure high-Z at power-up. |
| VCC | Power | Single supply pin for all logic and I/O; requires local 0.1µF bypass capacitor per TI layout guidelines. |
| GND | Ground | Dedicated ground terminal; must be connected to solid ground plane to minimize ground bounce (VOLP < 0.8V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5V inputs accepted with 3.3V VCC - eliminates discrete level translators in heterogeneous voltage domains. |
| Ultra-small ZQN BGA footprint | 4.00mm × 3.00mm body - saves PCB area in space-constrained modules like LED display controllers and I/O expanders. |
| Output ground bounce (VOLP) | < 0.8V at VCC = 3.3V - reduces noise coupling into adjacent analog or RF circuits on shared PCB layers. |
| Output VOH undershoot (VOHV) | > 2V at VCC = 3.3V - maintains clean high-level integrity during fast switching into capacitive loads. |
| Latch-up immunity | > 250mA per JESD17 - ensures reliability under transient overvoltage or ESD events in industrial environments. |
Applications
| Server Backplane Interface | LED Display Column Driver |
|---|---|
|
Use Scenario: Isolating CPU-to-peripheral communication paths on multi-slot server motherboards with hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling controlled signal routing between 3.3V processor and 5V peripheral slots. Use Value: Ioff protection prevents back-drive damage during card insertion/removal; 5.5V-tolerant inputs interface directly with legacy peripherals. |
Use Scenario: Driving 8 parallel columns of high-brightness LEDs in outdoor signage with PWM dimming. IC Role / Device Role / Timing Role: High-current noninverting driver translating FPGA GPIO outputs to LED column sink paths. Use Value: ±24mA drive strength per output sustains brightness at full duty cycle; 5.9ns tpd supports >10kHz PWM without timing skew. |
| Network Switch Data Path | Industrial I/O Expander |
|
Use Scenario: Buffering address/data lines between ASIC and DDR memory or PHY interfaces in 1U switches. IC Role / Device Role / Timing Role: Low-skew octal buffer minimizing inter-channel delay variation across 8-bit data lanes. Use Value: tsk(o) ≤1.5ns ensures setup/hold margin for 100+ MHz synchronous transfers; 3.6V VCC headroom accommodates supply ripple. |
Use Scenario: Adding 8 programmable digital outputs to PLC main controller via SPI/I²C GPIO expander. IC Role / Device Role / Timing Role: Logic-level translator and current amplifier between low-drive MCU GPIO and industrial solenoid/relay loads. Use Value: 5.5V input tolerance accepts feedback signals from 24V field devices; 3-state outputs allow shared bus arbitration with other expanders. |
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 (6.5mm × 6.4mm); higher RθJA (120.3°C/W) vs. ZQN's 87.2°C/W; same electrical specs. | Better suited for manual soldering or prototyping; less optimal for thermally dense LED display PCBs. | Select when board assembly uses standard reflow profiles and thermal management is less constrained. |
| 74LVC244ABQ | Nexperia BGA variant (DHVQFN20); identical pinout but different thermal pad design; RθJA = 85°C/W. | Valid drop-in replacement only if PCB land pattern matches DHVQFN20 mechanical dimensions (4.0×3.0mm body, 0.5mm pitch). | Choose for second-source assurance where TI's ZQN footprint is already validated in production. |
Compared with SN74LVC244AZQNR, SN74LVC244APWR offers easier hand-solderability but sacrifices thermal performance, while 74LVC244ABQ provides identical functionality in a functionally equivalent BGA package requiring mechanical verification for drop-in use.
Availability
SN74LVC244AZQNR is available at Aetrix Electronics and suitable for server backplanes, LED display drivers, network switch data paths, and industrial I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC244AZQNR 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 SN74LVC244A product line delivers high-speed, low-voltage octal buffers optimized for mixed-signal system interfacing, particularly in data-intensive infrastructure equipment where signal integrity and voltage translation are critical.
FAQ
What is the maximum operating temperature range for SN74LVC244AZQNR?
The SN74LVC244AZQNR is specified for operation from –40°C to +85°C ambient temperature. This range is validated per TI's characterization and applies to the ZQN BGA package. The device supports industrial-grade thermal stability without derating up to +85°C, making it suitable for enclosed server chassis and outdoor LED displays.
Does SN74LVC244AZQNR support 5V logic inputs while powered from 3.3V?
Yes, SN74LVC244AZQNR accepts input voltages up to 5.5V regardless of VCC level (1.65V–3.6V). This allows direct interfacing with 5V microcontrollers or sensors without external level-shifting circuitry-confirmed by TI's "mixed-mode signal operation" specification and VI absolute maximum rating of 6.5V.
What is the purpose of the Ioff feature in SN74LVC244AZQNR?
The Ioff feature in SN74LVC244AZQNR disables all outputs and limits leakage current to ±10µA when VCC = 0V. This prevents back-driving of powered circuitry during hot-insertion of daughter cards or partial power-down states-critical for modular server and telecom infrastructure where live swapping is required.
Can SN74LVC244AZQNR drive 50Ω transmission lines directly?
Yes, SN74LVC244AZQNR can drive 50Ω lines directly: its ±24mA output drive at 3V meets the current requirement for 3.3V logic into 50Ω (66mA peak), and its 5.9ns tpd supports clean edge rates. Layout best practices-such as source termination and ground-plane routing-are recommended to suppress ringing, as noted in TI's Application Report SCAS414AG.
Is SN74LVC244AZQNR pin-compatible with other SN74LVC244A variants?
SN74LVC244AZQNR uses the ZQN 20-ball BGA footprint, which is mechanically distinct from TSSOP, SOIC, or QFN packages. While electrically identical, it is not pin-compatible with SN74LVC244APWR (TSSOP-20) or SN74LVC244ADW (SOIC-20) due to differing pinouts and solder-ball vs. gull-wing terminations-PCB redesign is required for substitution.
SN74LVC244AZQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-BGA MICROSTAR JUNIOR (4x3)
SN74LVC244AZQNR FAQ
1.How can I place an order for SN74LVC244AZQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244AZQNR 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 SN74LVC244AZQNR reliable?
The price and inventory of SN74LVC244AZQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244AZQNR is usually 5 days.
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Once your SN74LVC244AZQNR 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 SN74LVC244AZQNR?
For technical support, including SN74LVC244AZQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244AZQNR requirements.
6.How does Aetrix verify that SN74LVC244AZQNR is sourced from the original manufacturer or authorized distributors?
All SN74LVC244AZQNR 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 SN74LVC244AZQNR meets industry standards.
7.What is the process for return or replacement of SN74LVC244AZQNR?
All SN74LVC244AZQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244AZQNR, 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 SN74LVC244AZQNR part is unused and in its original packaging.
Return procedure for SN74LVC244AZQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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