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onsemi MC74LCX02D
- Part No.:
- MC74LCX02D
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC74LCX02D.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
MC74LCX02D from onsemi is a low-voltage CMOS quad 2-input NOR gate operating from 1.65 V to 5.5 V, featuring 5 V-tolerant inputs, 24 mA balanced output drive at 3.0 V, near-zero static supply current (10 µA), and SOIC-14 or TSSOP-14 packaging. It serves as a level-shifting logic interface in mixed-voltage digital systems such as industrial controllers and automotive body electronics.
For engineers reviewing the MC74LCX02D datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package mapping, truth table behavior, propagation delay (4.2 ns max at 5 V), and AEC-Q100 qualified automotive-grade sourcing context for reliable system integration.
Technical Context
The MC74LCX02D implements four independent 2-input NOR gates with TTL-compatible input thresholds and LVCMOS/LVTTL interoperability. Its 5 V-tolerant inputs enable direct interfacing with legacy 5 V logic while powered from 1.65–3.3 V rails, eliminating external level shifters.
Each gate exhibits matched tPLH/tPHL propagation delay (4.2 ns max at VCC = 4.5–5.5 V), low dynamic switching noise (VOLP ≤ 0.8 V at 3.3 V), and rail-to-rail output swing - critical for noise-immune signal routing in high-density PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation across 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| Input Voltage Max | −0.5 V to +6.5 V - enables safe 5 V input driving without clamping diodes or external protection |
| tPLH / tPHL | 4.2 ns max at VCC = 4.5–5.5 V - ensures timing predictability in high-speed control paths |
| IOL / IOH | ±24 mA at VCC = 3.0 V - drives multiple standard logic loads without buffering |
| ICC Quiescent | 10 µA max - minimizes standby power in battery-backed or energy-sensitive applications |
| VIH / VIL | 0.70 × VCC min / 0.30 × VCC max at 5 V - guarantees robust noise margin against ground bounce and crosstalk |
| CIN / COUT | 7 pF / 8 pF typical - reduces capacitive loading on upstream drivers and improves signal integrity |
Pinout & Package
MC74LCX02D is available in SOIC-14 (Case 751A) and TSSOP-14 (Case 948G) packages. Both are 14-pin surface-mount devices with identical pin assignment and thermal characteristics (θJA = 116 °C/W for SOIC-14).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | O0, O1, O2, O3 | NOR gate outputs - actively driven HIGH/LOW or high-impedance when unused (per datasheet guidance) |
| 2, 3, 5, 6, 8, 9, 11, 12 | A0/B0, A1/B1, A2/B2, A3/B3 | Independent input pairs per gate - must be tied to VCC or GND if unused to prevent floating-induced ICC increase |
| 7 | GND | Digital ground reference - requires low-inductance connection to minimize switching noise coupling |
| 14 | VCC | Power supply - decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables direct interface with 5 V TTL without level-shifter ICs or resistive dividers |
| 24 mA balanced drive | Supports fan-out of ≥10 LVTTL loads at 3.3 V, reducing need for buffer stages |
| 10 µA quiescent ICC | Lowers system-level standby power by >95% vs. standard 74HC-series equivalents |
| Latchup immunity >100 mA | Guarantees robustness against transient overvoltage events in noisy industrial environments |
| AEC-Q100 qualified (-Q variant) | Validated for automotive body electronics requiring extended temperature (−40 °C to +125 °C) and reliability compliance |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Signal conditioning and logic-level translation between 5 V sensor interfaces and 3.3 V microcontroller GPIOs in programmable logic controllers. IC Role / Device Role / Timing Role: Quad NOR gate performing active-low enable decoding and voltage-domain bridging with sub-5 ns propagation delay. Use Value: Eliminates discrete resistor networks or dedicated level translators, reducing BOM count and layout area by 30% per interface channel. | Use Scenario: Door lock actuator control sequencing where 5 V CAN transceiver status signals must trigger 3.3 V MCU interrupt inputs. IC Role / Device Role / Timing Role: Input-synchronized NOR logic gate providing glitch-free enable/disable assertion with 5 V-tolerant input staging. Use Value: Ensures deterministic timing under ESD stress (HBM >2000 V) and meets AEC-Q100 transient immunity requirements without added protection circuitry. |
| Medical Diagnostic Equipment | Smart Energy Metering Systems |
Use Scenario: Isolated communication interface handshaking between isolated 5 V UART peripherals and 1.8 V/3.3 V SoC subsystems. IC Role / Device Role / Timing Role: Level-translating NOR gate implementing handshake acknowledgment with precise 4.2 ns delay matching across all four channels. Use Value: Maintains timing coherence across dual-voltage domains, preventing data loss during high-throughput serial transfers. | Use Scenario: Tamper-detection logic combining mechanical switch inputs (5 V pulled) with secure MCU reset generation in utility meters. IC Role / Device Role / Timing Role: Quad NOR gate performing OR-NOT logic on multiple tamper inputs to assert a synchronized hardware reset signal. Use Value: Achieves <10 µA total system standby current contribution while meeting IEC 62056-21 anti-tampering response time requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC02APWR | Lower VIH threshold (0.7 × VCC only at VCC ≥ 4.5 V); 32 mA drive at 3.3 V; no AEC-Q100 qualification | Optimized for commercial-grade 3.3 V systems; lacks 5 V tolerance at 1.65–2.7 V VCC | Select when cost sensitivity outweighs automotive qualification and mixed-voltage interface needs |
| 74AUP1G02GW,125 | Single-gate variant; 0.8–3.6 V VCC range; 4 mA drive; ultra-low ICC (0.9 µA) | Requires four separate packages for quad functionality; unsuitable for 5 V input interfacing | Choose for space-constrained, ultra-low-power applications where gate count is distributed across PCB |
Compared with SN74LVC02APWR and 74AUP1G02GW,125, the MC74LCX02D uniquely combines 5 V-tolerant inputs across its full 1.65–5.5 V supply range, AEC-Q100 qualification, and quad-gate integration - making it the only option for automotive or industrial designs requiring both voltage-domain bridging and production-grade reliability in a single SOIC/TSSOP package.
Availability
MC74LCX02D is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and smart energy metering systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant variants.
Supply support for MC74LCX02D 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC74LCX02D belongs to the LCX family of low-voltage, 5 V-tolerant CMOS logic devices engineered for seamless interoperability between legacy 5 V systems and modern sub-3.3 V digital architectures.
FAQ
What is the maximum supply voltage rating for MC74LCX02D?
The MC74LCX02D has an absolute maximum DC supply voltage (VCC) rating of +6.5 V, but its recommended operating range is 1.65 V to 5.5 V. Operation beyond 5.5 V voids guaranteed performance and may compromise latchup immunity or ESD robustness. The MC74LCX02D must not be operated continuously above 5.5 V in production systems.
Does MC74LCX02D support true 5 V input tolerance across its entire supply range?
Yes, the MC74LCX02D supports 5 V-tolerant inputs across its full 1.65 V to 5.5 V VCC range, with VI ratings up to +6.5 V. This allows safe interfacing with 5 V TTL outputs even when powered from 1.8 V or 2.5 V rails - a key differentiator from non-LCX LVC-family devices that lose 5 V tolerance below 3.0 V VCC.
What is the recommended handling for unused inputs on MC74LCX02D?
Unused inputs on the MC74LCX02D must never be left floating, as this increases ICC and risks metastability. Per the datasheet, each unused input (A0–A3, B0–B3) must be tied directly to either VCC or GND using a low-impedance connection. Pull-up/pull-down resistors are acceptable only if their value ensures VI remains within specified VIH/VIL thresholds across temperature and voltage extremes.
Is MC74LCX02D pin-compatible with standard 74HC02 or 74LS02 devices?
No, the MC74LCX02D is not pin-compatible with 74HC02 or 74LS02. While all three are quad 2-input NOR gates in 14-pin packages, the MC74LCX02D uses a distinct pinout: outputs occupy pins 1, 4, 10, 13 and inputs are interleaved (e.g., A0/B0 on pins 2/3), whereas 74HC02 places all inputs on one side and outputs on the other. PCB layout must be redesigned for MC74LCX02D replacement.
What thermal derating applies to MC74LCX02D in SOIC-14 packaging?
In SOIC-14 (Case 751A), the MC74LCX02D has a junction-to-ambient thermal resistance (θJA) of 116 °C/W. At 125 °C ambient and 5.5 V VCC, maximum allowable power dissipation is 1077 mW - but actual dissipation rarely exceeds 10 mW due to 10 µA quiescent current. Derating is only necessary under sustained 24 mA output loading at elevated ambient temperatures (>85 °C).
MC74LCX02D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Max):
- 10 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.7V ~ 0.8V
- Input Logic Level - High:
- 1.7V ~ 2V
- Max Propagation Delay @ V, Max CL:
- 5.5ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MC74LCX02D FAQ
1.How can I place an order for MC74LCX02D through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX02D 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 MC74LCX02D reliable?
The price and inventory of MC74LCX02D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX02D is usually 5 days.
3.What payment methods are accepted for MC74LCX02D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX02D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX02D?
MC74LCX02D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX02D 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 MC74LCX02D?
For technical support, including MC74LCX02D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX02D requirements.
6.How does Aetrix verify that MC74LCX02D is sourced from the original manufacturer or authorized distributors?
All MC74LCX02D 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 MC74LCX02D meets industry standards.
7.What is the process for return or replacement of MC74LCX02D?
All MC74LCX02D units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX02D, 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 MC74LCX02D part is unused and in its original packaging.
Return procedure for MC74LCX02D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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