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Nexperia USA Inc. 74ALVC244BQ,115
- Part No.:
- 74ALVC244BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74ALVC244BQ,115.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:415
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Product details
Overview
74ALVC244BQ,115 from Nexperia is an octal 3-state buffer/line driver with dual independent output enables (1OE, 2OE), supporting two 4-bit or one 8-bit data path configuration. It operates from 1.65 V to 3.6 V, features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and is rated for -40 °C to +125 °C. It serves in bus isolation, level translation, and memory address/data buffering in industrial control and embedded computing systems.
For engineers reviewing the 74ALVC244BQ,115 datasheet, 74ALVC244BQ,115 pinout, 74ALVC244BQ,115 application, or 74ALVC244BQ,115 equivalent, key selection criteria include its dual OE control architecture, IOFF-enabled hot-swap capability, guaranteed propagation delay ≤3.2 ns at 3.3 V, ±24 mA drive strength, and DHVQFN20 thermal-enhanced package for high-density PCB layouts.
Technical Context
The device implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3). Its Schmitt-trigger inputs accept slow-rising signals and tolerate TTL-level inputs across the full 1.65–3.6 V supply range.
IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ±80 μA, enabling safe live insertion in multi-rail systems. The DHVQFN20 package (SOT764-1) provides low thermal resistance (12.9 mW/K derating above 111 °C) and 20-terminal land-grid layout optimized for signal integrity and reflow reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - Enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Propagation Delay (tpd) | ≤3.2 ns at VCC = 3.3 V - Supports >300 MHz bus operation with deterministic timing margins. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - Sustains robust signal integrity driving 15 pF loads over 10 cm traces. |
| IOFF Leakage Current | ±80 μA at VCC = 0 V - Prevents damaging backfeed during partial system power-down or hot-plug events. |
| Input Threshold Hysteresis | Typical 0.3 V - Rejects noise on slow edges (e.g., mechanical switch debouncing or long cable runs). |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLCs, and base station power management. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Reduces field failure risk in manual handling and automated assembly environments. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, exposed thermal pad (non-soldered by default), 20 terminals in quad arrangement with terminal 1 index area marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - Independently disable Group 1 (Y0–Y3) or Group 2 (Y0–Y3) to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 input data lines - Accept CMOS/TTL-compatible signals; Schmitt-triggered for noise margin. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 output data lines - Drive bidirectional buses or downstream logic with ±24 mA sink/source. |
| 10 | GND | Ground reference - Must be connected to system 0 V plane; thermal pad may float or tie to GND per layout requirements. |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 input data lines - Electrically isolated from Group 1; supports dual-bus or mirrored data paths. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 output data lines - Matched routing length to 2Y outputs ensures inter-group skew <0.5 ns. |
| 20 | VCC | Supply voltage - Requires local 100 nF ceramic decoupling within 3 mm of pin for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit buffers | Enables selective bus gating: e.g., isolate CPU address bus (Group 1) from peripheral data bus (Group 2) using separate OE controls. |
| IOFF partial power-down | Prevents destructive current flow when VCC is off but I/O pins remain biased - critical for PCIe add-in cards and modular backplanes. |
| Schmitt-trigger inputs | Accepts slow-edge signals down to 10 ns/V slew rate - eliminates need for external RC filtering in sensor interface or rotary encoder applications. |
| Overvoltage-tolerant inputs | Withstand up to 3.6 V regardless of VCC setting - allows safe interfacing with 3.3 V peripherals while operating at 1.8 V core voltage. |
| JEDEC-compliant voltage standards | Fully compliant with JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8C/JESD36 (2.7–3.6 V) - ensures interoperability across mixed-voltage SoC designs. |
Applications
| Industrial PLC Backplane Interface | Embedded Memory Expansion Module |
|---|---|
Use Scenario: Isolating CPU address/data buses from multiple I/O expansion slots in a modular programmable logic controller. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control per slot - enables dynamic slot arbitration and hot-swap detection via IOFF state monitoring. Use Value: Eliminates bus contention during module insertion/removal; IOFF prevents backfeed into powered-down slots, meeting IEC 61000-4-2 ESD immunity requirements. | Use Scenario: Extending SRAM or NOR flash capacity on a compact ARM-based edge node board with space-constrained layout. IC Role / Device Role / Timing Role: Address/data line driver with sub-3.2 ns tpd - maintains setup/hold timing margins for 100 MHz parallel memory interfaces. Use Value: DHVQFN20 footprint reduces PCB area by 45% vs. TSSOP20; thermal performance sustains continuous 8-bit burst reads without derating. |
| Automotive Body Control Unit (BCU) | Test Equipment Signal Conditioning |
Use Scenario: Level-shifting and buffering LIN bus diagnostic signals between 5 V microcontroller peripherals and 3.3 V CAN transceiver subsystems. IC Role / Device Role / Timing Role: Voltage-tolerant buffer with Schmitt inputs - cleans noisy analog sensor outputs before digitization and enables fail-safe shutdown via OE assertion. Use Value: Operates reliably across -40 °C to +125 °C ambient; IOFF protects transceiver ICs during BCU power sequencing faults. | Use Scenario: Driving multiple DUT inputs simultaneously from a single pattern generator channel in automated test equipment. IC Role / Device Role / Timing Role: Fan-out buffer with matched group delays - ensures simultaneous stimulus delivery to 8 DUT pins with <0.5 ns inter-output skew. Use Value: ±24 mA drive sustains 5 V logic levels into 50 Ω coaxial loads; low propagation delay variation (<0.4 ns) guarantees precise timing alignment. |
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 |
|---|---|---|---|
| SN74LVC244APWR | Same logic function, TSSOP20 package (SOT360-1), 1.65–3.6 V, but lacks IOFF circuitry and has higher tpd (max 5.2 ns at 3.3 V). | Not suitable for partial-power-down systems; requires external isolation for hot-swap use cases. | Select only if thermal constraints allow TSSOP20 and IOFF is unnecessary. |
| 74LVC244ABQ,115 | Pin-compatible DHVQFN20 variant with identical pinout and electrical specs, but rated only to +85 °C (not +125 °C). | Restricted to commercial-temperature applications; fails qualification for under-hood or industrial enclosure deployments. | Choose only for cost-sensitive consumer electronics where extended temperature range is not required. |
Compared with SN74LVC244APWR and 74LVC244ABQ,115, the 74ALVC244BQ,115 uniquely delivers IOFF protection and full -40 °C to +125 °C operation in the same compact DHVQFN20 package - making it the sole option for thermally demanding, hot-pluggable, or safety-critical bus isolation tasks.
Availability
74ALVC244BQ,115 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory expansion modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ALVC244BQ,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, discrete, and MOSFET solutions, with manufacturing rooted in process innovation and automotive-grade quality systems.
The 74ALVC series targets high-speed, low-voltage digital interfacing in space- and power-constrained applications - designed specifically for robust operation in industrial automation, communications infrastructure, and automotive subsystems.
FAQ
Can 74ALVC244BQ,115 operate with VCC = 1.65 V while interfacing with 3.3 V inputs?
Yes. Its inputs are overvoltage tolerant up to 3.6 V regardless of VCC level, and VIH min is 0.65 × VCC (1.07 V at 1.65 V), ensuring reliable recognition of 3.3 V HIGH signals. This enables seamless level translation from legacy 3.3 V peripherals to modern 1.8 V logic domains without external components.
What is the purpose of the exposed thermal pad on the DHVQFN20 package?
The exposed pad (terminal 1 index area) improves thermal dissipation and mechanical stability. Per Nexperia's recommendation, it may remain electrically floating or be connected to GND - but must never be soldered to a voltage plane other than GND. No electrical connection is required for functional operation, though grounding enhances thermal performance by ~15%.
How does IOFF protect the device during partial power-down?
When VCC = 0 V, the IOFF circuitry forces all outputs into high-impedance state and limits leakage current to ±80 μA, even if input or output pins are driven to 3.6 V. This prevents reverse current flow that could damage upstream drivers or destabilize powered-down power rails - a requirement for PCIe hot-plug and modular server architectures.
Is the 74ALVC244BQ,115 pin-compatible with older 74ALVC244 variants in SO20 or TSSOP20 packages?
No. While logic function and signal names match, the DHVQFN20 (SOT764-1) pinout differs significantly from SO20 (SOT163-1) and TSSOP20 (SOT360-1) packages. Pin positions for 1A0, 1Y0, 2A0, 2Y0, and OE signals are rearranged in quadrants. PCB redesign is required; migration requires layout verification using Nexperia's SOT764-1 footprint drawing.
74ALVC244BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVC
- 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:
- 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-DHVQFN (4.5x2.5)
74ALVC244BQ,115 FAQ
1.How can I place an order for 74ALVC244BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVC244BQ,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 74ALVC244BQ,115 reliable?
The price and inventory of 74ALVC244BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVC244BQ,115 is usually 5 days.
3.What payment methods are accepted for 74ALVC244BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVC244BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVC244BQ,115?
74ALVC244BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVC244BQ,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 74ALVC244BQ,115?
For technical support, including 74ALVC244BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVC244BQ,115 requirements.
6.How does Aetrix verify that 74ALVC244BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74ALVC244BQ,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 74ALVC244BQ,115 meets industry standards.
7.What is the process for return or replacement of 74ALVC244BQ,115?
All 74ALVC244BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVC244BQ,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 74ALVC244BQ,115 part is unused and in its original packaging.
Return procedure for 74ALVC244BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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