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NXP Semiconductors 74LVC244AD,112
- Part No.:
- 74LVC244AD,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC244AD,112.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:24,458
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Product details
Overview
74LVC244AD,112 from Nexperia is an octal 3-state buffer/line driver in SO20 (SOT163-1) package, designed for bidirectional bus interfacing and level translation between 1.2 V–3.6 V logic domains. It features dual independent output enables (1OE, 2OE), Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and overvoltage-tolerant inputs up to 5.5 V - enabling reliable operation in mixed-voltage systems such as industrial I/O expansion and FPGA peripheral buffering.
For engineers reviewing the 74LVC244AD,112 datasheet, 74LVC244AD,112 pinout, 74LVC244AD,112 application, or 74LVC244AD,112 equivalent, this device is selected for its guaranteed 3.6 V supply compatibility, sub-8 ns propagation delay at 3.3 V, -40 °C to +125 °C operating range, and validated use in high-noise digital backplanes where bus hold (on LVCH variant) and IOFF are critical - not for analog signal conditioning or power switching.
Technical Context
This device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE, 2OE). All eight inputs feature Schmitt-trigger action with hysteresis ≥0.3 V at 3.3 V, enabling robust handling of slow-rising signals from mechanical switches or legacy TTL sources.
The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current during hot insertion or partial system power-down. Inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to 5 V microcontrollers while driving 3.3 V buses - confirmed per JESD8-7A, JESD8-5A, and JESD8-C standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.2 V to 3.6 V - supports single-supply operation across low-voltage microcontrollers and FPGAs without level shifters. |
| Propagation delay (tpd) | 1.5 ns (min) to 5.9 ns (max) at VCC = 3.3 V - ensures timing-critical data path integrity in 100 MHz+ digital interfaces. |
| IOFF leakage | ±10 μA max at VCC = 0 V - prevents damaging current flow during hot-swap or partial power-down sequences. |
| Input voltage tolerance | Up to 5.5 V - enables direct interfacing with 5 V logic without external clamping diodes or resistors. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive control modules and industrial PLC I/O cards. |
| ESD rating (HBM) | >2000 V - meets JEDEC JS-001 Class 2, reducing susceptibility to handling damage in manufacturing environments. |
Pinout & Package
74LVC244AD,112 is supplied in plastic small outline package (SO20), SOT163-1, with 20 leads and 7.5 mm body width. Pin 1 is index-marked; package conforms to JEDEC MS-013 and RoHS-compliant reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (pins 18,16,14,12) or Group 2 (pins 3,5,7,9) outputs to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs - accept 1.2 V–3.6 V logic levels with Schmitt-trigger hysteresis for noise margin. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 outputs - drive 3.3 V buses with 24 mA sink/source capability and 0.55 V VOL at 24 mA. |
| 10 | GND | Ground reference - must be connected to system 0 V plane; decoupling capacitor required within 5 mm. |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 data inputs - electrically identical to 1A0–1A3; support independent input sourcing per group. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 outputs - provide matched timing and drive strength to 2Y0–2Y3 for symmetrical bus loading. |
| 20 | VCC | Supply voltage - requires local 100 nF ceramic decoupling; voltage must remain within 1.2–3.6 V during all operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | Two OE pins (1OE, 2OE) allow selective isolation of two 4-bit data groups - essential for multiplexed address/data buses in microcontroller peripherals. |
| IOFF partial power-down | Outputs automatically enter high-impedance state when VCC = 0 V - eliminates backfeed risk during hot-plug or firmware update sequences. |
| Schmitt-trigger inputs | Input hysteresis ≥0.3 V at 3.3 V - rejects noise on long PCB traces or switch debouncing paths without external RC networks. |
| Overvoltage-tolerant inputs | Accepts 0–5.5 V regardless of VCC setting - enables direct connection to 5 V sensors or legacy controllers without level-shifting components. |
| JEDEC-compliant voltage ranges | Validated for JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C (2.7–3.6 V) - ensures interoperability across multi-rail SoC designs. |
Applications
| Industrial I/O Expansion | FPGA Peripheral Buffering |
|---|---|
|
Use Scenario: Isolating and driving 8-bit parallel I/O lines from a microcontroller to external relays, encoders, or analog front-ends in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional buffer with independent group enables - provides electrical isolation, voltage translation, and bus contention prevention. Use Value: Eliminates need for discrete level shifters and pull-up networks; IOFF prevents latch-up during controller reset sequences. |
Use Scenario: Interfacing FPGA GPIO banks operating at 1.8 V or 3.3 V with legacy 5 V peripheral ICs (e.g., ADCs, DACs, display drivers) on the same PCB. IC Role / Device Role / Timing Role: Voltage-translating line driver - accepts 5 V inputs while driving 3.3 V FPGA inputs, with sub-6 ns tpd preserving setup/hold margins. Use Value: Reduces BOM count by replacing dual-supply translators; Schmitt inputs suppress noise from noisy motor-drive sections. |
| Automotive Body Control Module | Embedded Test Equipment Interface |
|
Use Scenario: Driving LED arrays, solenoid drivers, and sensor readback lines in under-dash ECUs exposed to wide ambient temperature swings (-40 °C to +125 °C). IC Role / Device Role / Timing Role: Robust 3-state buffer - provides ESD-hardened signal routing between MCU and high-side/low-side drivers. Use Value: HBM >2000 V withstands assembly ESD events; guaranteed operation at 125 °C avoids thermal derating in enclosed enclosures. |
Use Scenario: Implementing programmable signal routing in automated test fixtures that switch between DUTs with varying logic families (TTL, CMOS, LVTTL). IC Role / Device Role / Timing Role: Configurable bus isolator - uses OE pins to dynamically assign data paths, supporting multiple DUT protocols via firmware. Use Value: Dual OE architecture enables software-defined bus topology; 5.5 V input tolerance accommodates TTL-level test signals without attenuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVCH244AD,112 | Includes bus hold on all data inputs (IBHL/IBHH); otherwise identical pinout, timing, and voltage specs. | Eliminates need for external pull-ups on unused inputs in floating-bus scenarios (e.g., unpopulated daughterboards). | Select when input stability during configuration or standby is required without external resistors. |
| SN74LVC244APWR | TSSOP20 (SOT360-1) package; 4.4 mm body width; 10.0 mW/K thermal derating above 100 °C vs. SO20's 12.3 mW/K above 109 °C. | Better suited for space-constrained PCBs but requires tighter layout for thermal management at full load. | Select when board area is constrained and thermal profile allows TSSOP mounting with adequate copper pour. |
Compared with 74LVC244AD,112, the 74LVCH244AD,112 adds bus hold for passive input stabilization without external components, while SN74LVC244APWR trades SO20's thermal robustness for smaller footprint - both retain identical logic function, timing, and voltage translation capability.
Availability
74LVC244AD,112 is available at Aetrix Electronics and suitable for industrial I/O expansion, FPGA peripheral buffering, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC244AD,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, discrete, and MOSFET solutions - delivering energy-efficient, scalable components for automotive, industrial, and consumer markets.
The 74LVC244A family targets robust digital interface bridging in mixed-voltage systems, emphasizing IOFF safety, wide VCC range, and JEDEC-standard compliance for seamless integration into next-generation embedded platforms.
FAQ
Can 74LVC244AD,112 drive 5 V logic loads?
No - its outputs are specified only up to VCC (max 3.6 V). While inputs tolerate 5.5 V, outputs cannot source/sink into 5 V rails without external level-shifting circuitry. Driving 5 V TTL loads requires a pull-up to 5 V and verification of VOH/VOL thresholds against the target device's VIH/VIL.
Is bus hold functionality present on 74LVC244AD,112?
No - bus hold is exclusive to the 74LVCH244A variant. The 74LVC244AD,112 lacks internal bus hold circuitry; external pull-up or pull-down resistors are required to prevent floating inputs in unconnected states.
What is the maximum capacitive load this device can drive reliably?
Test data specifies 30 pF (for VCC ≤ 2.7 V) and 50 pF (for VCC ≥ 3.0 V) with defined rise/fall times and propagation delays. Exceeding these loads increases tpd and may cause timing violations; for >50 pF, verify waveform integrity using the test circuit in Figure 6 of the datasheet.
Does 74LVC244AD,112 support hot-swap insertion?
Yes - the IOFF circuit ensures outputs go high-impedance when VCC = 0 V, preventing back-current flow during live insertion. However, input pins must not be driven before VCC stabilizes; sequencing control or series resistors are recommended for full hot-swap robustness.
74LVC244AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVC244AD,112 FAQ
1.How can I place an order for 74LVC244AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC244AD,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 74LVC244AD,112 reliable?
The price and inventory of 74LVC244AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC244AD,112 is usually 5 days.
3.What payment methods are accepted for 74LVC244AD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC244AD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC244AD,112?
74LVC244AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC244AD,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 74LVC244AD,112?
For technical support, including 74LVC244AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC244AD,112 requirements.
6.How does Aetrix verify that 74LVC244AD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC244AD,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 74LVC244AD,112 meets industry standards.
7.What is the process for return or replacement of 74LVC244AD,112?
All 74LVC244AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC244AD,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 74LVC244AD,112 part is unused and in its original packaging.
Return procedure for 74LVC244AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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