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Nexperia USA Inc. 74HCT02DB,118
- Part No.:
- 74HCT02DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT02DB,118.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
74HCT02DB,118 from Nexperia is a quad 2-input NOR gate logic IC with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V), 4.5–5.5 V supply range, and SO14 (SOT108-1) package. It delivers 11 ns typical propagation delay at 4.5 V, supports -40 °C to +125 °C operation, and integrates input clamp diodes for overvoltage-tolerant interfacing in industrial control bus termination circuits.
For engineers reviewing the 74HCT02DB,118 datasheet, 74HCT02DB,118 pinout, 74HCT02DB,118 application, or 74HCT02DB,118 equivalent, key selection criteria include TTL-level input compatibility, SO14 thermal derating (10.1 mW/K above 100 °C), guaranteed VOL ≤ 0.4 V at 5.2 mA sink, and compliance with JEDEC JESD7A and JESD8C standards.
Technical Context
The 74HCT02DB,118 implements four independent 2-input NOR gates using CMOS silicon technology with buffered TTL-compatible input stages. Its input structure includes clamp diodes enabling safe interface to signals exceeding VCC when used with current-limiting resistors.
It operates strictly within 4.5–5.5 V supply range per JEDEC JESD8C, delivers rail-to-rail output swing (VOH ≥ 3.7 V, VOL ≤ 0.4 V at full load), and meets latch-up immunity >100 mA per JESD78 Class II Level B - confirming robustness in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - provides four independent Boolean OR-NOT operations in one package |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems and avoids undervoltage lockout |
| Propagation Delay | 11 ns typical (VCC = 4.5 V, CL = 50 pF) - enables reliable timing in sub-100 MHz digital control paths |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees interoperability with legacy 5 V TTL outputs without level-shifting |
| Output Drive | ±4.0 mA (VOH), ±5.2 mA (VOL) - sufficient to drive 10 LS-TTL loads or terminate parallel bus stubs |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial PLC I/O stages |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces risk of handling damage during PCB assembly |
Pinout & Package
74HCT02DB,118 uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, and 1.75 mm maximum height. Pin 1 is index-marked; leads are gull-wing with 0.25 mm minimum thickness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1Y, 2Y, 3Y, 4Y | Active-high NOR outputs - each sinks or sources up to 5.2 mA/4.0 mA with rail-aligned swing |
| 2, 5, 8, 11 | 1A, 2A, 3A, 4A | First input per gate - accepts TTL-level signals; clamp diodes allow safe overvoltage biasing |
| 3, 6, 9, 12 | 1B, 2B, 3B, 4B | Second input per gate - identical electrical behavior to A inputs; enables dual-input logic combination |
| 7 | GND | Ground reference - must be low-impedance connection to minimize switching noise coupling |
| 14 | VCC | Positive supply - requires local 100 nF ceramic decoupling within 5 mm of pin for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH/VIL thresholds match legacy 5 V TTL families - eliminates need for external level shifters in mixed-logic systems |
| Input clamp diodes | Enable direct interface to signals up to VCC + 0.5 V using series current-limiting resistors - simplifies bus arbitration circuitry |
| High noise immunity | Typical noise margin >1.2 V at 5 V supply - suppresses false triggering in electrically noisy factory-floor environments |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive parasitic thyristor activation during ESD or surge events |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in engine control units and outdoor telecom base stations |
Applications
| Industrial PLC Input Conditioning | Legacy System Bus Termination |
|---|---|
Use Scenario: Isolating and conditioning discrete sensor inputs (e.g., limit switches, photoelectric sensors) before feeding into microcontroller GPIOs. IC Role / Device Role / Timing Role: NOR gate configured as active-low input buffer with pull-up - inverts and cleans mechanical contact bounce. Use Value: Eliminates need for external Schmitt triggers or RC filters; VIH/VIL margins ensure reliable detection across voltage drift and cable drop. | Use Scenario: Terminating unterminated RS-485 or CAN bus stubs in distributed control networks where impedance matching is critical. IC Role / Device Role / Timing Role: Logic gate used as active terminator enable controller - asserts termination only during active communication windows. Use Value: Reduces signal reflections by dynamically enabling 120 Ω termination via gate output, minimizing standby power vs. fixed resistors. |
| Power Sequencing Control | Reset Signal Generation |
Use Scenario: Coordinating startup order of multiple DC-DC converters in FPGA-based embedded systems. IC Role / Device Role / Timing Role: NOR gate implementing AND-NOT logic between individual converter OK signals - generates global "all-rails-ready" flag. Use Value: Provides deterministic power-up sequence without microcontroller intervention; propagation delay <12 ns ensures tight timing alignment. | Use Scenario: Generating synchronized system reset pulses from independent watchdog and power-on reset signals. IC Role / Device Role / Timing Role: NOR gate acting as reset combiner - asserts reset when either input is LOW (active-low logic). Use Value: Guarantees clean reset assertion even if one source fails high; VOL ≤ 0.4 V ensures solid LOW to downstream reset controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT02DR | TI SO14 variant; identical VIH/VIL, but tpd = 13 ns typical at 5 V (vs. 11 ns) | Same industrial temperature range (-40 °C to +125 °C); lower drive strength (±4 mA) | Select when TI supply chain alignment is required; verify timing margin with 2 ns slower propagation |
| MC74HCT02ADR2G | ON Semiconductor SO14; VIH = 2.0 V min, but ICC = 40 μA max (vs. 20 μA for Nexperia) | Same pinout and function; higher quiescent current impacts battery-powered sleep modes | Prefer for designs already using ON Semi logic families; confirm static power budget impact |
Compared with SN74HCT02DR and MC74HCT02ADR2G, the 74HCT02DB,118 offers the fastest propagation (11 ns), lowest ICC (20 μA max), and highest noise immunity - making it optimal for timing-critical industrial control nodes where deterministic response and low standby power are essential.
Availability
74HCT02DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus termination circuits, power sequencing subsystems, and reset signal combiners requiring stable component supply across extended temperature ranges.
Supply support for 74HCT02DB,118 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 leading Dutch semiconductor manufacturer specializing in high-volume logic, analog, and discrete components, with core expertise in automotive-qualified and industrial-grade standard products.
The 74HCT02DB,118 belongs to Nexperia's HCT logic family - engineered specifically for seamless integration with legacy TTL systems while delivering CMOS power efficiency and robust ESD performance in harsh environments.
FAQ
What is the maximum allowable supply voltage for 74HCT02DB,118?
The absolute maximum supply voltage is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V per JEDEC JESD8C. Operation above 5.5 V voids parametric guarantees and risks accelerated oxide degradation - sustained use beyond 5.5 V is not advised even if below the 7.0 V absolute limit.
Can 74HCT02DB,118 interface directly with 3.3 V microcontrollers?
No - its TTL-compatible inputs require VIH ≥ 2.0 V, but 3.3 V logic HIGH may fall below guaranteed recognition threshold under voltage droop or capacitive loading. A level shifter or resistor divider is required for reliable interfacing; the device itself is not 3.3 V tolerant on inputs.
Does the SO14 package support reflow soldering per JEDEC J-STD-020?
Yes - the SOT108-1 package is qualified for standard Pb-free reflow profiles with peak temperature up to 260 °C (per JEDEC J-STD-020D). The 1.75 mm max height and gull-wing leads ensure coplanarity and wetting reliability on standard FR-4 PCBs.
How does input clamping affect external resistor selection for overvoltage protection?
Clamp diodes conduct when input exceeds VCC + 0.5 V or falls below GND − 0.5 V. To limit IIK to ±20 mA maximum, series resistors must be ≥ |Vin − VCC| / 20 mA (e.g., 1 kΩ for 25 V transients). Resistor value directly sets fault current - undersized resistors risk diode thermal failure.
74HCT02DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 19ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
74HCT02DB,118 FAQ
1.How can I place an order for 74HCT02DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT02DB,118 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 74HCT02DB,118 reliable?
The price and inventory of 74HCT02DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT02DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT02DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT02DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT02DB,118?
74HCT02DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT02DB,118 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 74HCT02DB,118?
For technical support, including 74HCT02DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT02DB,118 requirements.
6.How does Aetrix verify that 74HCT02DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT02DB,118 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 74HCT02DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT02DB,118?
All 74HCT02DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT02DB,118, 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 74HCT02DB,118 part is unused and in its original packaging.
Return procedure for 74HCT02DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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