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NXP Semiconductors 74LVC38AD,112
- Part No.:
- 74LVC38AD,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVC38AD,112.pdf
- Description:
- IC GATE NAND 4CH 2-INP 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
74LVC38AD,112 from NXP Semiconductors is a quad 2-input NAND gate IC with open-drain outputs, designed for level translation between 3.3 V and 5 V logic domains. It operates across 1.2 V to 5.5 V supply, supports −40 °C to +125 °C ambient range, and delivers sub-4 ns propagation delay at 3.3 V in wired-OR bus interface applications.
For engineers reviewing the 74LVC38AD,112 datasheet, 74LVC38AD,112 pinout, 74LVC38AD,112 application, or 74LVC38AD,112 equivalent, this device is selected for mixed-voltage I²C pull-up, SMBus arbitration, active-LOW wired-OR bus termination, and TTL-to-CMOS interfacing where open-drain drive and 5 V-tolerant inputs are required.
Technical Context
The 74LVC38AD,112 implements four independent NAND gates, each with open-drain output enabling wired-OR logic without external components. Its input structure accepts 0–5.5 V signals regardless of VCC, allowing direct connection to 5 V drivers while powered from 1.8 V or 3.3 V rails.
Each gate exhibits rail-to-rail input voltage thresholds defined per JEDEC standards (JESD8-7A/5A/C), with VOL ≤ 0.3 V at 100 µA load and tPZL/tPLZ ≤ 4.0 ns over full temperature range at VCC = 3.0–3.6 V. ESD robustness exceeds 2000 V HBM per JESD22-A114F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NAND with open-drain outputs enabling wired-OR/AND bus structures |
| Supply Voltage Range | 1.2 V to 5.5 V - supports single-supply operation across LVC-family voltage grades |
| Input Voltage Tolerance | 0 V to 6.5 V - allows direct interfacing with 5 V TTL/CMOS without level shifters |
| Propagation Delay | ≤ 4.0 ns (tPZL/tPLZ) at VCC = 3.0–3.6 V, −40 °C to +125 °C - ensures timing compliance in high-speed bus arbitration |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded control |
| ESD Rating | HBM > 2000 V - meets IEC 61000-4-2 system-level robustness requirements |
| Output Drive | Open-drain, 32 mA sink capability at VCC = 4.5 V - supports standard I²C/SMBus pull-up configurations |
Pinout & Package
74LVC38AD,112 is housed in SO14 (SOT108-1) package: plastic small outline, 14-lead, 3.9 mm body width, 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Data input A for gates 1–4 | 5 V-tolerant CMOS inputs accepting 0–5.5 V; no level-shifter needed for legacy logic |
| 1B, 2B, 3B, 4B | Data input B for gates 1–4 | Independent dual-input per gate; enables discrete NAND logic or bus enable control |
| 1Y, 2Y, 3Y, 4Y | Open-drain output for gates 1–4 | Sinks current only; requires external pull-up for HIGH state - essential for wired-OR bus sharing |
| GND (Pin 7) | Ground reference | 0 V return path for all internal circuitry and output current sinking |
| VCC (Pin 14) | Supply voltage | Single power rail for entire IC; powers input buffers, logic core, and output FETs |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables direct connection to 5 V microcontrollers or peripherals while operating from 1.8 V or 3.3 V supply - eliminates discrete level translators |
| Wide VCC range (1.2–5.5 V) | Supports battery-powered, low-voltage systems (1.2 V/1.8 V) and legacy 5 V designs on same BOM - reduces variant count |
| Open-drain outputs | Allows multiple 74LVC38AD,112 outputs to share one pull-up resistor - simplifies I²C/SMBus arbitration and interrupt-line OR-ing |
| JESD8-compliant thresholds | Guarantees correct logic interpretation across 1.65–3.6 V supply ranges per JEDEC standards - ensures interoperability in mixed-voltage systems |
| High ESD immunity | HBM > 2000 V, CDM > 1000 V - reduces field failure risk during handling and system integration without added protection circuitry |
Applications
| I²C Bus Arbitration | SMBus Host Alert Interface |
|---|---|
Use Scenario: Multiple I²C masters contend for bus ownership using START/STOP condition detection. IC Role / Device Role / Timing Role: 74LVC38AD,112 NAND gates detect simultaneous START pulses and assert wired-OR arbitration signal. Use Value: Open-drain outputs directly wire together to form shared arbitration line; 5 V-tolerant inputs accept master-side 5 V START pulses while VCC = 3.3 V. |
Use Scenario: SMBus host monitors ALERT# lines from multiple slave devices to detect fault conditions. IC Role / Device Role / Timing Role: 74LVC38AD,112 acts as active-LOW wired-OR combiner for up to four independent ALERT# signals. Use Value: Eliminates need for external diode-OR network; sink capability supports standard 10 kΩ pull-up and 3.3 V host interface. |
| Legacy TTL-to-CMOS Translation | Industrial Control Input Conditioning |
Use Scenario: Integrating 5 V TTL sensors into a 3.3 V microcontroller system with clean logic-level conversion. IC Role / Device Role / Timing Role: 74LVC38AD,112 provides NAND logic and voltage translation in single package; configured as buffer/inverter via tied inputs. Use Value: Input thresholds track JEDEC JESD8-5A (2.3–2.7 V) and JESD8-C (2.7–3.6 V), ensuring reliable recognition of TTL HIGH/LOW at VCC = 2.5 V or 3.3 V. |
Use Scenario: PLC input modules condition noisy 24 V DC sensor signals before feeding to low-voltage logic. IC Role / Device Role / Timing Role: 74LVC38AD,112 interfaces with external voltage divider and Schmitt-trigger input stage to generate clean, debounced logic edges. Use Value: Wide VCC range allows direct use of 5 V regulated rail; −40 °C to +125 °C rating ensures reliability in uncontrolled cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NAND gate with open-drain applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC38AQPWRQ1 | Automotive AEC-Q100 Grade 1 qualified (−40 °C to +125 °C); identical logic and pinout | Required for automotive ECUs; includes enhanced process controls and traceability | Select when automotive qualification and PPAP documentation are mandatory |
| 74LVC38APW,118 | TSSOP14 package (SOT402-1); 4.4 mm body width vs. SO14's 3.9 mm; identical electrical specs | Better thermal performance and higher board density; requires rework of footprint | Select for space-constrained PCBs where thermal dissipation above 60 °C matters |
Compared with SN74LVC38AQPWRQ1, the 74LVC38AD,112 lacks automotive qualification but offers lower cost and broader commercial availability; compared with 74LVC38APW,118, it uses the more manufacturable SO14 package with established reflow profiles and test socket compatibility.
Availability
74LVC38AD,112 is available at Aetrix Electronics and suitable for industrial control systems, embedded communication interfaces, and mixed-voltage logic translation requiring stable component supply across long production lifecycles.
Supply support for 74LVC38AD,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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LVC38AD,112 belongs to NXP's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in resource-constrained embedded systems where power efficiency and voltage flexibility are critical.
FAQ
What logic function does the 74LVC38AD,112 implement?
The 74LVC38AD,112 implements four independent 2-input NAND gates, each with an open-drain output. It does not provide push-pull or tri-state outputs. Each gate performs standard NAND logic (output LOW only when both inputs are HIGH), and the open-drain configuration requires an external pull-up resistor to achieve a HIGH output state. This architecture enables wired-OR bus structures essential for I²C and SMBus protocols.
Can the 74LVC38AD,112 operate from a 1.8 V supply?
Yes, the 74LVC38AD,112 is fully specified to operate from 1.2 V to 5.5 V, including 1.8 V. At VCC = 1.8 V, input thresholds comply with JESD8-7A (1.65–1.95 V), VIH is 0.65 × VCC (≈1.17 V), and VOL remains ≤0.3 V at 100 µA load. Propagation delay increases to ≤6.9 ns, but functionality and noise margins remain within specification across −40 °C to +125 °C.
Is the 74LVC38AD,112 pin-compatible with standard 74HC38 or 74LS38?
No, the 74LVC38AD,112 is not pin-compatible with 74HC38 or 74LS38. While all three are quad 2-input NANDs in 14-pin SO packages, the 74LVC38AD,112 has open-drain outputs (requiring pull-ups), whereas 74HC38 and 74LS38 feature push-pull outputs. Pin functions differ: 74LVC38AD,112 assigns GND to Pin 7 and VCC to Pin 14, matching standard 14-pin logic layout, but output behavior and input voltage tolerance (5 V tolerant vs. HC/LS rail-referenced) prevent direct substitution without circuit redesign.
What is the maximum sink current per output of the 74LVC38AD,112?
The 74LVC38AD,112 guarantees 32 mA sink current per output at VCC = 4.5 V and Tamb = 25 °C, with VOL ≤ 0.8 V. At VCC = 3.3 V, it delivers 24 mA with VOL ≤ 0.8 V. These values are specified under steady-state DC conditions; transient peak currents may exceed these limits briefly but must remain within absolute maximum ratings (IO ≤ 50 mA per output, Ptot ≤ 500 mW).
Does the 74LVC38AD,112 require external pull-up resistors?
Yes, the 74LVC38AD,112 requires external pull-up resistors on all four open-drain outputs (Pins 3, 6, 8, 11) to achieve HIGH logic states. The value depends on bus capacitance and speed: for I²C Fast-mode (400 kHz), 2.2 kΩ is typical with 200 pF load; for SMBus, 10 kΩ is common. No pull-up is needed for LOW-only operation (e.g., interrupt assertion), but HIGH functionality mandates external termination to VCC or another logic rail.
74LVC38AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NAND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- Open Drain
- Voltage - Supply:
- 1.2V ~ 5.5V
- Current - Quiescent (Max):
- 40 µA
- Current - Output High, Low:
- -, 32mA
- Input Logic Level - Low:
- 0.7V ~ 0.8V
- Input Logic Level - High:
- 1.7V ~ 2V
- Max Propagation Delay @ V, Max CL:
- 2.3ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74LVC38AD,112 FAQ
1.How can I place an order for 74LVC38AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC38AD,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 74LVC38AD,112 reliable?
The price and inventory of 74LVC38AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC38AD,112 is usually 5 days.
3.What payment methods are accepted for 74LVC38AD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC38AD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC38AD,112?
74LVC38AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC38AD,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 74LVC38AD,112?
For technical support, including 74LVC38AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC38AD,112 requirements.
6.How does Aetrix verify that 74LVC38AD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC38AD,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 74LVC38AD,112 meets industry standards.
7.What is the process for return or replacement of 74LVC38AD,112?
All 74LVC38AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC38AD,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 74LVC38AD,112 part is unused and in its original packaging.
Return procedure for 74LVC38AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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