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Nexperia USA Inc. 74LV244DB,112
- Part No.:
- 74LV244DB,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LV244DB,112.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
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Product details
Overview
74LV244DB,112 from Nexperia is an octal 3-state buffer/line driver with dual independent output-enable controls (1OE, 2OE), operating across 1.0 V to 5.5 V supply, delivering <14 ns propagation delay at 3.3 V and supporting -40 °C to +125 °C ambient operation. It functions as two 4-bit buffers or one 8-bit buffer and features input clamp diodes for overvoltage-tolerant interfacing in mixed-voltage bus systems.
For engineers reviewing the 74LV244DB,112 datasheet, 74LV244DB,112 pinout, 74LV244DB,112 application, or 74LV244DB,112 equivalent, this device is selected for low-voltage bidirectional bus buffering, level translation between 1.2 V/1.8 V/3.3 V domains, and high-noise-margin data latching in industrial control backplanes and legacy parallel interfaces.
Technical Context
The 74LV244DB,112 implements a CMOS-based dual-group 3-state buffer architecture: Group 1 (pins 1A0–1A3, 1Y0–1Y3, 1OE) and Group 2 (2A0–2A3, 2Y0–2Y3, 2OE) operate independently, enabling selective bus isolation. Each group's active-LOW enable allows synchronous or staggered output control without internal contention.
It supports TTL-compatible inputs at VCC ≥ 2.7 V and exhibits robust dynamic behavior: typical tpd = 8 ns (VCC = 3.3 V, CL = 15 pF), VOHV > 2 V, VOLP < 0.8 V - confirming stable switching under fast edge rates and ground-bounce-sensitive conditions in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.0 V to 5.5 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Propagation delay (tpd) | 8 ns typical at VCC = 3.3 V, CL = 15 pF - ensures sub-10 ns timing margin for 100 MHz bus clocking. |
| Output drive strength | ±8 mA at VCC = 3.0 V - sufficient to drive 15 pF loads across 10 cm FR-4 traces with controlled rise/fall times. |
| Input voltage thresholds | VIH = 2.0 V min (VCC = 2.7–3.6 V); VIL = 0.8 V max - provides >1.2 V noise margin in 3.3 V systems. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood industrial automation, motor drives, and base station power management. |
| ESD protection | HBM > 2000 V, CDM > 1000 V - reduces handling sensitivity and improves board-level reliability in manual assembly environments. |
| Power dissipation | 500 mW max (SO20 package) - supports continuous operation in thermally constrained enclosures without forced cooling. |
Pinout & Package
74LV244DB,112 is packaged in SOT339-1 (SSOP20), a 20-pin shrink small outline package with 0.65 mm lead pitch and 7.2 mm body width - optimized for high-density PCB layouts while maintaining hand-solderability and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-LOW enable inputs controlling four outputs each; tied LOW to activate respective buffer group, HIGH to place outputs in high-impedance state. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs; accept CMOS/TTL levels and tolerate overvoltage via integrated clamp diodes when used with current-limiting resistors. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 true (non-inverting) outputs; electrically isolated from Group 1 when 2OE is HIGH, enabling independent bus arbitration. |
| 10 | GND | Signal reference and return path for all I/O and supply currents; requires low-inductance connection to minimize ground bounce during simultaneous switching. |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 data inputs; identical electrical characteristics to 1A0–1A3, allowing symmetrical layout routing for differential pair avoidance. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 true outputs; share same output structure and timing as 2Y0–2Y3, permitting identical trace length matching for skew-critical applications. |
| 20 | VCC | Primary supply rail; decoupling capacitor (100 nF X7R) required within 5 mm to suppress supply transients induced by 3-state transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.0–5.5 V) | Eliminates need for external voltage translators in multi-rail systems - e.g., interfaces 1.2 V FPGA I/O to 3.3 V peripheral buses directly. |
| Dual independent 3-state enables | Enables time-multiplexed bus sharing: Group 1 drives while Group 2 is tri-stated, then vice versa - critical for half-duplex parallel communication. |
| Input clamp diodes | Permits safe interfacing to voltages up to VCC + 0.5 V using series resistors - protects against accidental 5 V signal injection into 3.3 V domains. |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal integrity during high-speed switching in shared-ground systems - prevents false triggering of adjacent CMOS receivers. |
| JEDEC-compliant voltage standards | Validated per JESD8-7 (1.65–1.95 V), JESD8C (2.7–3.6 V), and JESD36 (4.5–5.5 V) - ensures interoperability with certified memory, MCU, and ASIC suppliers. |
Applications
| Industrial PLC Backplane Buffering | Legacy Parallel Printer Interface |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO banks from noisy 24 V industrial I/O modules via optocoupler-isolated 5 V bus segments. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing direction-controlled data transfer between isolated 5 V domains while suppressing ground loop noise. Use Value: Dual OE pins allow synchronized enable/disable of both groups during bus arbitration cycles, eliminating bus contention during hot-plug events. |
Use Scenario: Interfacing modern ARM-based SoC parallel printer ports (3.3 V) to legacy Centronics-style printers requiring 5 V TTL signaling. IC Role / Device Role / Timing Role: Level-translating octal buffer driving 5 V printer data lines with controlled slew rate and noise immunity. Use Value: Input clamp diodes and 5.5 V absolute max rating permit safe 5 V input reception without external clamping components. |
| Automotive Body Control Module (Non-Safety) | Test Equipment Digital Pattern Generator |
|
Use Scenario: Driving multiple CAN transceiver enable lines and sensor multiplexer address lines in 12 V vehicle subsystems with local 3.3 V LDO rails. IC Role / Device Role / Timing Role: Low-power octal buffer distributing synchronized control signals across distributed ECUs with minimal propagation skew. Use Value: -40 °C to +125 °C qualification and latch-up immunity (>100 mA) ensure reliable operation near engine compartments and power electronics. |
Use Scenario: Generating precise 8-bit digital stimulus patterns for IC functional testing on ATE platforms with programmable voltage rails. IC Role / Device Role / Timing Role: High-speed, low-skew buffer stage ensuring clean, monotonic waveform edges into DUT input pins. Use Value: 8 ns typical tpd and <0.8 V ground bounce guarantee setup/hold timing compliance for sub-100 MHz test vectors. |
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 | Lower VCC min (1.65 V), higher IO drive (24 mA), no input clamp diodes | Requires external clamping for overvoltage tolerance; better suited for 1.8 V/3.3 V-only systems with tight drive requirements | Select when higher output current and lower static power are prioritized over mixed-voltage robustness. |
| 74AHC244PW,118 | Narrower VCC range (2.0–5.5 V), faster tpd (5.5 ns @ 5 V), higher ICC | Not suitable for 1.2 V/1.8 V domains; optimized for speed-critical 5 V legacy designs | Choose only for 5 V-only applications where sub-6 ns delay outweighs power and voltage flexibility trade-offs. |
Compared with SN74LVC244APWR and 74AHC244PW,118, the 74LV244DB,112 uniquely balances ultra-wide supply range (1.0–5.5 V), built-in overvoltage protection, and industrial temperature support - making it the sole option for mixed-voltage, thermally demanding, and field-repairable embedded systems.
Availability
74LV244DB,112 is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, legacy parallel printer interfacing, automotive body control modules, and ATE pattern generation requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74LV244DB,112 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 devices - serving automotive, industrial, and consumer markets with JEDEC-qualified, AEC-Q200-aligned components.
The 74LV244DB,112 belongs to Nexperia's LV (Low Voltage) logic family, engineered for energy-efficient, mixed-supply-system interfacing in space-constrained industrial and communications equipment.
FAQ
What is the maximum capacitive load the 74LV244DB,112 can drive while maintaining specified timing?
The device is characterized for CL = 15 pF and 50 pF loads per output. At 3.3 V, tpd remains ≤14 ns up to 50 pF; beyond that, propagation delay increases linearly (~0.1 ns/pF). For reliable 100 MHz operation, total net capacitance (trace + receiver + probe) must stay ≤30 pF to preserve setup/hold margins.
Can 74LV244DB,112 safely interface a 5 V microcontroller output to a 3.3 V FPGA input?
No - the 74LV244DB,112 is not a level translator. Its inputs tolerate up to VCC + 0.5 V, but its outputs swing only to VCC. To connect 5 V logic to 3.3 V inputs, use the 74LV244DB,112 with VCC = 3.3 V and add series current-limiting resistors on the 5 V inputs to leverage internal clamp diodes - verified per datasheet Section 1, Figure 1.
Does 74LV244DB,112 support hot-swap or live-insertion on powered buses?
Yes - its input clamp diodes, ±20 mA input clamping current rating, and 3-state outputs with fast disable time (≤26 ns) enable safe insertion into live 3.3 V or 5 V buses. However, VCC must be stable before applying input signals, and OE pins should be held inactive (HIGH) until power sequencing completes.
How does the dual OE architecture improve system-level noise immunity?
By enabling independent control of two 4-bit groups, the dual OE structure allows staggered activation - e.g., driving address bits first, then data bits - reducing simultaneous switching output (SSO) noise by up to 50% compared to single-OE octal buffers. This lowers ground bounce (VOLP < 0.8 V) and minimizes crosstalk in adjacent signal layers.
74LV244DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 1V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74LV244DB,112 FAQ
1.How can I place an order for 74LV244DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV244DB,112 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 74LV244DB,112 reliable?
The price and inventory of 74LV244DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV244DB,112 is usually 5 days.
3.What payment methods are accepted for 74LV244DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV244DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV244DB,112?
74LV244DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV244DB,112 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 74LV244DB,112?
For technical support, including 74LV244DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV244DB,112 requirements.
6.How does Aetrix verify that 74LV244DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LV244DB,112 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 74LV244DB,112 meets industry standards.
7.What is the process for return or replacement of 74LV244DB,112?
All 74LV244DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV244DB,112, 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 74LV244DB,112 part is unused and in its original packaging.
Return procedure for 74LV244DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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