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Nexperia USA Inc. 74LVT244ABQ,115
- Part No.:
- 74LVT244ABQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74LVT244ABQ,115.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,622
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Product details
Overview
74LVT244ABQ,115 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for high-speed bus interface applications in industrial and telecom systems. It features two independent output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, overvoltage-tolerant inputs up to 5.5 V, and bus hold circuitry eliminating external pull-ups. Operates across -40 °C to +85 °C at 2.7–3.6 V supply.
For engineers reviewing the 74LVT244ABQ,115 datasheet, 74LVT244ABQ,115 pinout, 74LVT244ABQ,115 application, or 74LVT244ABQ,115 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), IOFF power-down support, DHVQFN20 thermal performance, and TTL-level compatibility in mixed-voltage 3.3 V systems.
Technical Context
This BiCMOS octal buffer implements two independent 4-bit groups, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3). The device supports live insertion/extraction and includes IOFF circuitry that disables outputs during power-down to prevent back-driving.
Bus hold inputs maintain valid logic states on unused pins without external resistors, while overvoltage-tolerant inputs allow safe interfacing with 5 V buses. Propagation delays are tightly specified: tPLH/tPHL ≤ 4.1 ns at VCC = 3.6 V, and 3-state enable/disable times (tPZH/tPLZ) ≤ 5.6 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures stable operation in modern 3.3 V logic domains with ±0.3 V margin. |
| Output Drive | +64 mA / –32 mA - Supports heavy capacitive loads and fan-out to multiple CMOS/TTL inputs. |
| Input Voltage Range | 0 V to 5.5 V - Enables direct connection to 5 V buses without level shifters. |
| Propagation Delay | tPLH/tPHL ≤ 4.1 ns @ VCC = 3.6 V - Meets timing requirements for >100 MHz bus operation. |
| 3-State Enable Time | tPZH ≤ 5.6 ns @ VCC = 3.6 V - Minimizes bus contention during hot-swap or multiplexer switching. |
| Operating Temperature | –40 °C to +85 °C - Qualified for industrial ambient environments without derating. |
| Bus Hold Current | IBHL = 75–150 μA @ VI = 0.8 V - Actively holds floating inputs at valid LOW without external components. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, no leads, thermally enhanced exposed pad (GND-connected per design guidance), 20 terminals, pin 1 index marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1Y3 | Group 1 output (bit 3); driven when 1OE = LOW. |
| 2 | 1A3 | Group 1 input (bit 3); latched and bus-held when unused. |
| 3 | 2Y0 | Group 2 output (bit 0); driven when 2OE = LOW. |
| 4 | 2A1 | Group 2 input (bit 1); compatible with 5 V TTL logic levels. |
| 5 | 2Y1 | Group 2 output (bit 1); supports ±64 mA sink/source. |
| 6 | 1Y2 | Group 1 output (bit 2); shares 1OE control with pins 1,12,14,16. |
| 7 | 1A2 | Group 1 input (bit 2); internally pulled via bus hold to last valid state. |
| 8 | 2A2 | Group 2 input (bit 2); tolerant to 5.5 V input transients. |
| 9 | 2Y2 | Group 2 output (bit 2); IOFF active when VCC = 0 V. |
| 10 | 1Y1 | Group 1 output (bit 1); low-capacitance (8 pF) for fast edge rates. |
| 11 | 1A1 | Group 1 input (bit 1); clamped to –1.2 V for ESD robustness. |
| 12 | 2A3 | Group 2 input (bit 3); supports live insertion with power-up 3-state. |
| 13 | 2Y3 | Group 2 output (bit 3); matched delay to other group 2 outputs. |
| 14 | 1Y0 | Group 1 output (bit 0); VOL ≤ 0.55 V @ IOL = 64 mA ensures noise margin. |
| 15 | 1A0 | Group 1 input (bit 0); VIH = 2.0 V minimum for reliable TTL recognition. |
| 16 | 2OE | Active-low enable for group 2 outputs (pins 3,5,7,13); asynchronous control. |
| 17 | GND | Ground reference (pin 10); thermal pad must be floated or connected to GND. |
| 18 | 2A0 | Group 2 input (bit 0); supports 100 μA leakage max at VI = 0 V. |
| 19 | 1OE | Active-low enable for group 1 outputs (pins 1,6,10,14); independent of 2OE. |
| 20 | VCC | 3.3 V supply input; total power dissipation limited to 500 mW at +85 °C. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process | Enables 4.1 ns propagation delay with 64 mA drive-critical for high-speed backplane buffers. |
| IOFF partial power-down | Prevents current backflow when VCC = 0 V, enabling safe hot-plug in modular systems. |
| Bus hold inputs | Eliminates need for 10 kΩ pull-up/down resistors on unused data lines-reducing BOM count and board area. |
| Overvoltage-tolerant inputs | Withstands 5.5 V inputs while powered from 3.3 V-enabling direct legacy 5 V signal interfacing. |
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes-preventing bus contention during power sequencing. |
Applications
| Industrial PLC Backplane Interface | Telecom Line Card Data Buffering |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from noisy 24 V fieldbus signals via optocoupler-isolated 3.3 V logic rails. IC Role / Device Role / Timing Role: Octal buffer provides direction-controlled signal conditioning between isolated domains; dual OE allows staggered enable for glitch-free handshaking. Use Value: Bus hold prevents floating inputs during isolation gaps; 5.5 V tolerance accommodates transient coupling on shared PCB traces. |
Use Scenario: Driving eight parallel SERDES lanes from a single FPGA I/O bank in a 10G line card. IC Role / Device Role / Timing Role: Line driver delivers clean, low-skew signals to transmission lines; 4.1 ns tPHL ensures setup/hold compliance at 125 MHz clock rates. Use Value: ±64 mA drive sustains signal integrity into 50 Ω traces; DHVQFN20 thermal pad reduces junction rise under sustained load. |
| Automated Test Equipment (ATE) Signal Routing | Medical Imaging Data Acquisition Module |
|
Use Scenario: Multiplexing test signals between DUT sockets and measurement instruments in a rack-mounted ATE system. IC Role / Device Role / Timing Role: 3-state buffer acts as bidirectional bus switch; independent OE pins enable precise timing of signal path activation/deactivation. Use Value: tPZH ≤ 5.6 ns minimizes dead time between channel switches; IOFF blocks leakage during power cycling of instrument modules. |
Use Scenario: Interfacing a 16-bit ADC output bus to an ARM Cortex-M7 processor in a portable ultrasound unit. IC Role / Device Role / Timing Role: Level-shifting buffer translates ADC's 3.3 V LVCMOS outputs to processor's 3.3 V I/O domain while adding drive strength. Use Value: Low 8 pF CO ensures minimal added capacitance on high-speed ADC data lines; –40 °C to +85 °C rating covers clinical operating range. |
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/–24 mA), 1.65–3.6 V supply, no bus hold, no IOFF. | Suitable for low-power, non-hot-swap designs where 5 V tolerance is not required. | Select when cost and static power are prioritized over drive strength and robustness. |
| 74LVCH244APWJ | Same 3.3 V family, adds Schmitt-trigger inputs (hysteresis), identical drive and timing. | Better noise immunity in electrically noisy medical or motor-control environments. | Choose when input signal edges are slow or noisy and require hysteresis-based noise rejection. |
Compared with SN74LVC244APWR, the 74LVT244ABQ,115 offers 2.7× higher sink current and built-in bus hold, reducing external components; versus 74LVCH244APWJ, it lacks Schmitt inputs but delivers identical speed and drive in standard CMOS environments.
Availability
74LVT244ABQ,115 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, ATE signal routing, and medical imaging data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVT244ABQ,115 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74LVT series targets high-speed 3.3 V bus interface applications, emphasizing robustness, mixed-voltage interoperability, and thermal efficiency in space-constrained industrial and telecom equipment.
FAQ
What is the function of the exposed thermal pad on the DHVQFN20 package?
The exposed pad (terminal 10) is a non-electrical thermal relief feature. Per Nexperia SOT764-1 specification, it has no electrical requirement and may be left floating or connected to GND for improved heat dissipation-no solder mask opening is mandatory, and thermal vias are recommended if GND-connected.
Can 74LVT244ABQ,115 safely drive a 5 V bus while powered from 3.3 V?
Yes-the inputs tolerate up to 5.5 V regardless of VCC, and the outputs are 3-state with high-impedance OFF-state. However, outputs cannot source/sink into a 5 V rail while enabled; they operate only within the 0–VCC range. For true 5 V bus driving, a level translator or open-drain configuration is required.
How does bus hold functionality affect input leakage current?
Bus hold actively maintains the last valid logic state using internal feedback, increasing typical input leakage to ±150 μA (IBHH/IBHL) at VCC = 3 V. This is intentional and replaces the need for external pull resistors; total system leakage remains lower than using discrete 10 kΩ resistors (which draw ~500 μA at 5 V).
Is the 74LVT244ABQ,115 qualified for automotive applications?
No-this device is specified for industrial temperature range (–40 °C to +85 °C) and carries no AEC-Q100 qualification. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical automotive use, and no automotive testing or qualification data is provided for this part number.
74LVT244ABQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-VFQFN Exposed Pad
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74LVT244ABQ,115 FAQ
1.How can I place an order for 74LVT244ABQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT244ABQ,115 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 74LVT244ABQ,115 reliable?
The price and inventory of 74LVT244ABQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT244ABQ,115 is usually 5 days.
3.What payment methods are accepted for 74LVT244ABQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT244ABQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT244ABQ,115?
74LVT244ABQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT244ABQ,115 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 74LVT244ABQ,115?
For technical support, including 74LVT244ABQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT244ABQ,115 requirements.
6.How does Aetrix verify that 74LVT244ABQ,115 is sourced from the original manufacturer or authorized distributors?
All 74LVT244ABQ,115 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 74LVT244ABQ,115 meets industry standards.
7.What is the process for return or replacement of 74LVT244ABQ,115?
All 74LVT244ABQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT244ABQ,115, 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 74LVT244ABQ,115 part is unused and in its original packaging.
Return procedure for 74LVT244ABQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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