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onsemi MC74LCX02DR2
- Part No.:
- MC74LCX02DR2
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC74LCX02DR2.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,457
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Product details
Overview
MC74LCX02DR2 from onsemi is a low-voltage CMOS quad 2-input NOR gate operating from 1.65 V to 5.5 V supply, featuring 5 V-tolerant inputs, 24 mA balanced output sink/source capability at 3.0 V, near-zero static supply current (10 µA), and SOIC-14 packaging. It enables level-shifting logic interfacing between 3.3 V/2.5 V systems and legacy 5 V TTL devices in industrial control and embedded I/O expansion.
For engineers reviewing the MC74LCX02DR2 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, truth table–aligned pin functions, thermal and ESD ratings, propagation delay (4.2 ns max at 5 V), and real-world interface guidance for mixed-voltage board design.
Technical Context
The MC74LCX02DR2 implements four independent 2-input NOR gates with TTL-compatible input thresholds and LVCMOS/LVTTL output drive. Its 5 V-tolerant inputs (VI up to 6.5 V) allow direct connection to 5 V logic without external level shifters, while its rail-to-rail output swing supports clean signal integrity across 1.65–5.5 V operation.
Propagation delay is specified from 4.2 ns (at 4.5–5.5 V) to 10.3 ns (at 1.65–1.95 V); output skew remains ≤1.0 ns across temperature. Input leakage is ±5.0 µA, and power-off leakage is ≤10 µA - critical for low-power standby modes in battery-backed systems.
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 Tolerance | −0.5 V to +6.5 V - enables safe interfacing with 5 V TTL outputs without clamping diodes or resistors |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to drive multiple LVTTL loads or small capacitive buses |
| Propagation Delay | 4.2 ns max at VCC = 4.5–5.5 V - ensures timing compliance in high-speed digital control paths |
| Static ICC | 10 µA max - minimizes quiescent power in always-on monitoring circuits and sleep-mode peripherals |
| ESD Rating | HBM >2000 V - meets industrial-grade robustness requirements for handling and board-level reliability |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive, factory automation, and outdoor equipment |
Pinout & Package
MC74LCX02DR2 is packaged in SOIC-14 (Case 751A), with 1.27 mm pitch, 8.75 mm × 3.9 mm body, and Pb-free finish. Pin 1 is marked by notch or beveled corner; pin 7 is GND, pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Outputs (O0, O1, O2, O3) | Active-low NOR outputs; each drives high/low with matched 24 mA sink/source at 3 V |
| 2, 3, 5, 6, 8, 9, 11, 12 | Inputs (A0/B0, A1/B1, A2/B2, A3/B3) | 5 V-tolerant CMOS inputs; require tie-high/tie-low if unused to prevent floating-induced current |
| 7 | GND | Ground reference for all logic and power domains; must be low-impedance for noise immunity |
| 14 | VCC | Single supply rail; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables direct interconnection with 5 V TTL without level translators or voltage dividers |
| Balanced ±24 mA output drive | Supports fan-out of ≥10 LVTTL loads at 3 V while maintaining VOL ≤0.4 V and VOH ≥2.2 V |
| Near-zero static ICC (10 µA) | Reduces system standby power by >95% vs. standard LS-TTL equivalents |
| Latchup immunity >100 mA | Guarantees robustness against transient overvoltage events in noisy industrial environments |
| Pb-free, RoHS-compliant package | SOIC-14 meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 for reflow compatibility |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Adding discrete logic-based input conditioning and OR/NOR combining for sensor fault detection in modular I/O racks. IC Role / Device Role / Timing Role: Quad NOR gate performing wired-OR fault aggregation and active-low enable gating for relay drivers. Use Value: 5 V-tolerant inputs accept direct connection to legacy 24 V optocoupler outputs via resistive divider; low ICC extends runtime in battery-buffered controllers. |
Use Scenario: Implementing door lock status arbitration and window motor inhibit logic in centralized body domain controllers. IC Role / Device Role / Timing Role: Signal combiner for redundant door ajar switches and safety interlock validation before actuation. Use Value: −40 °C to +125 °C rating ensures reliable operation in engine bay–adjacent modules; latchup immunity prevents failure during load dump transients. |
| Low-Power Sensor Hub Interface | Legacy System Voltage Translation |
|
Use Scenario: Glue logic for wake-up event consolidation from multiple ultra-low-power sensors (PIR, magnetic, ambient light) in smart building nodes. IC Role / Device Role / Timing Role: Active-low NOR gate enabling interrupt coalescing and power-gating control signals for MCU sleep/wake transitions. Use Value: 10 µA ICC allows continuous monitoring without compromising multi-year battery life; 1.65 V minimum VCC supports coin-cell–powered designs. |
Use Scenario: Bridging 3.3 V microcontroller GPIOs to 5 V peripheral address/data buses in retrofitted instrumentation panels. IC Role / Device Role / Timing Role: Level-shifting logic buffer for address decoding and chip select generation in mixed-voltage memory subsystems. Use Value: VI = 5.5 V rating eliminates need for external translation ICs; 4.2 ns tPLH at 5 V preserves timing margins in 25 MHz bus cycles. |
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 VCC min (1.65 V same), but only 5 V-tolerant up to 5.5 V (same); 32 mA drive at 3.3 V (higher than MC74LCX02DR2's 24 mA) | Optimized for 3.3 V-only systems; lacks extended 125 °C rating (max TA = 85 °C) | Prefer when higher drive strength is needed and extended temperature is not required |
| 74LCX02MTCX | Same LCX family, identical electrical specs, but in TSSOP-14 (smaller footprint, higher thermal resistance: 150 °C/W vs. 116 °C/W) | Space-constrained PCBs where SOIC-14 height or thermal mass is prohibitive | Choose for compact layouts; verify thermal derating in high-power-density assemblies |
Compared with SN74LVC02APWR and 74LCX02MTCX, the MC74LCX02DR2 uniquely combines full −40 °C to +125 °C operation, proven 100 mA latchup immunity, and SOIC-14 mechanical robustness - making it the preferred choice for industrial and automotive applications demanding long-term reliability under thermal stress.
Availability
MC74LCX02DR2 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and low-power sensor hub interfaces requiring stable component supply, long-lifecycle support, and AEC-Q100–aligned quality assurance.
Supply support for MC74LCX02DR2 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, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC74LCX02DR2 belongs to the LCX low-voltage CMOS logic family, designed specifically for mixed-voltage system interfacing with robust 5 V tolerance, low power, and extended temperature operation.
FAQ
What is the maximum supply voltage for MC74LCX02DR2?
The MC74LCX02DR2 supports a DC supply voltage (VCC) from −0.5 V to +6.5 V per absolute maximum ratings, with recommended operation from 1.65 V to 5.5 V. Operating above 5.5 V risks exceeding safe junction temperature and degrading long-term reliability - always limit VCC to 5.5 V in normal use. The MC74LCX02DR2 maintains full functionality and timing specifications across its entire 1.65–5.5 V range.
Does MC74LCX02DR2 support 5 V logic inputs while powered from 3.3 V?
Yes, the MC74LCX02DR2 features 5 V-tolerant inputs rated to VI = −0.5 V to +6.5 V, allowing direct connection to 5 V TTL outputs even when VCC = 3.3 V. This eliminates external level-shifting components. The MC74LCX02DR2 achieves this via internal input protection circuitry that clamps excess voltage without affecting logic thresholds or increasing ICC - confirmed in the datasheet's VI specification and DC characteristics tables.
What is the propagation delay of MC74LCX02DR2 at 3.3 V supply?
At VCC = 3.0–3.6 V and TA = −40 °C to +125 °C, the MC74LCX02DR2 has a maximum propagation delay (tPLH/tPHL) of 5.5 ns. This value is measured under standard AC test conditions with CL = 50 pF and accounts for worst-case process, voltage, and temperature corners. The MC74LCX02DR2 delivers consistent timing performance across its full operating range, supporting reliable synchronization in sub-10 ns digital control loops.
Can unused inputs on MC74LCX02DR2 be left floating?
No - unused inputs on the MC74LCX02DR2 must never be left floating. The datasheet explicitly states "For ICC reasons, DO NOT FLOAT Inputs" and recommends tying each unused input to either GND or VCC. Floating inputs cause increased supply current, potential oscillation, and unpredictable output states due to CMOS input stage instability. This requirement applies to all four NOR gates in the MC74LCX02DR2, regardless of whether their outputs are used.
Is MC74LCX02DR2 RoHS compliant and lead-free?
Yes, the MC74LCX02DR2 is Pb-free, halogen-free/BFR-free, and fully RoHS compliant, as confirmed in the "Features" section of the official onsemi datasheet. The "G" suffix in the part marking (e.g., MC74LCX02DR2G) denotes the Pb-free package. The SOIC-14 body uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1, ensuring compatibility with standard lead-free reflow profiles.
MC74LCX02DR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
MC74LCX02DR2 FAQ
1.How can I place an order for MC74LCX02DR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX02DR2 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 MC74LCX02DR2 reliable?
The price and inventory of MC74LCX02DR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX02DR2 is usually 5 days.
3.What payment methods are accepted for MC74LCX02DR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX02DR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX02DR2?
MC74LCX02DR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX02DR2 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 MC74LCX02DR2?
For technical support, including MC74LCX02DR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX02DR2 requirements.
6.How does Aetrix verify that MC74LCX02DR2 is sourced from the original manufacturer or authorized distributors?
All MC74LCX02DR2 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 MC74LCX02DR2 meets industry standards.
7.What is the process for return or replacement of MC74LCX02DR2?
All MC74LCX02DR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX02DR2, 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 MC74LCX02DR2 part is unused and in its original packaging.
Return procedure for MC74LCX02DR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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