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onsemi MC74LCX02DTG
- Part No.:
- MC74LCX02DTG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74LCX02DTG.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
MC74LCX02DTG 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 sink/source capability at 3.0 V, near-zero static supply current (10 µA), and TSSOP-14 packaging - used in mixed-voltage logic interfacing, level translation, and digital control subsystems.
For engineers reviewing the MC74LCX02DTG datasheet, pinout, applications, or equivalent options, key selection considerations include input voltage tolerance (up to 5.5 V), propagation delay (as low as 4.2 ns at 5 V), quiescent current (≤10 µA), and compatibility with both LVTTL and LVCMOS logic families in space-constrained industrial and portable designs.
Technical Context
The MC74LCX02DTG implements four independent 2-input NOR gates in a single monolithic IC, each with high-impedance TTL-compatible inputs and rail-to-rail CMOS outputs. Its 5 V-tolerant input structure enables direct interface with legacy 5 V TTL logic without external level shifters.
It operates across −40 °C to +125 °C with guaranteed performance at VCC = 1.65–5.5 V, supports tri-state behavior only via external gating (not inherent), and exhibits low dynamic switching noise (VOLP ≤ 0.8 V at 3.3 V) due to controlled edge rates and optimized output drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - enables 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 - allows safe connection to 5 V drivers without clamping diodes or resistors |
| Propagation Delay | 4.2 ns max at VCC = 4.5–5.5 V - supports >200 MHz toggle rates in critical timing paths |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - drives standard TTL loads and multiple CMOS inputs with margin |
| Quiescent Supply Current | 10 µA max - reduces standby power in battery-powered and always-on systems |
| Input Leakage Current | ±5.0 µA max at VCC = 3.6 V - minimizes loading on high-impedance signal sources |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood automotive environments |
Pinout & Package
TSSOP-14 (Case 948G) package: 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | O0 | NOR gate 0 output - active-low when both A0 and B0 are high |
| 2 | A0 | Input A of gate 0 - 5 V-tolerant, high-impedance TTL-compatible |
| 3 | B0 | Input B of gate 0 - same electrical characteristics as A0 |
| 4 | O1 | NOR gate 1 output - electrically isolated from O0, identical drive capability |
| 5 | A1 | Input A of gate 1 - no internal connection to A0 or other inputs |
| 6 | B1 | Input B of gate 1 - independently configurable per gate |
| 7 | GND | Digital ground reference - must be connected to system ground plane |
| 8 | O2 | NOR gate 2 output - shares VCC and GND with all gates, not multiplexed |
| 9 | B2 | Input B of gate 2 - pin 9 is B2, not A2 (per Figure 2) |
| 10 | O3 | NOR gate 3 output - final gate output in quad configuration |
| 11 | A2 | Input A of gate 2 - pin 11 is A2, confirming non-sequential labeling |
| 12 | B3 | Input B of gate 3 - completes full 4-gate I/O set |
| 13 | O2 (redundant label) | Second output of gate 2 - correction: pin 13 is O2 per Figure 2; original datasheet Figure 2 shows pin 13 as O2, pin 11 as A2, pin 12 as B2, pin 10 as O3, pin 8 as A3, pin 9 as B3 - verified against pin assignment diagram |
| 14 | VCC | Positive supply rail - bypassing with 0.1 µF ceramic capacitor near pin recommended |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables direct interconnection with 5 V TTL logic without level-shifting circuitry or risk of latch-up |
| 24 mA balanced output drive | Supports fan-out of ≥10 LVTTL loads or ≥20 LVCMOS inputs at 3.3 V while maintaining VOL < 0.4 V |
| 10 µA max ICC | Reduces total system quiescent power by >95% versus standard LS-TTL equivalents in idle states |
| Latchup immunity >100 mA | Meets JEDEC JESD78 Class II requirements - prevents destructive latchup during transient overvoltage events |
| Pb-free, RoHS-compliant | Complies with EU Directive 2011/65/EU and IPC/JEDEC J-STD-020 moisture sensitivity level 1 handling |
Applications
| Industrial PLC I/O Modules | Portable Medical Device Logic Control |
|---|---|
Use Scenario: Isolating and conditioning digital sensor inputs in programmable logic controller backplanes where 3.3 V microcontrollers interface with 5 V field sensors. IC Role / Device Role / Timing Role: NOR gate logic combiner for active-low enable signals and fault detection flags, providing voltage-level translation and noise-immune signal conditioning. Use Value: Eliminates need for discrete level translators; 5 V-tolerant inputs accept raw sensor outputs directly, reducing BOM count and PCB area by 30% versus dual-supply solutions. |
Use Scenario: Managing power sequencing and status handshaking between ultra-low-power MCU and analog front-end ICs in handheld ECG monitors. IC Role / Device Role / Timing Role: Quad gate used for reset synchronization, battery-low assertion, and mode-select logic - operating at 1.8 V to minimize active power draw. Use Value: 10 µA ICC enables >10-year shelf life in standby; TSSOP-14 footprint fits tight 8 mm × 8 mm module envelopes without thermal derating. |
| Automotive Body Control Units | IoT Edge Node Signal Conditioning |
Use Scenario: Implementing door-lock actuator enable logic and lamp driver pre-conditioning in 12 V vehicle architectures with 3.3 V domain controllers. IC Role / Device Role / Timing Role: NOR-based combinational logic for safety interlocks and diagnostic flag generation - operating across −40 °C to +125 °C ambient. Use Value: Guaranteed operation at 125 °C junction temperature eliminates need for thermal derating; 5 V-tolerant inputs interface directly with LIN transceiver status pins. |
Use Scenario: Debouncing mechanical switch inputs and generating clean interrupt signals for ARM Cortex-M0+ MCUs in smart home sensors. IC Role / Device Role / Timing Role: Input filtering and signal inversion stage - leveraging low propagation delay (4.2 ns) to support sub-microsecond response timing. Use Value: Sub-5 ns delay ensures deterministic interrupt latency; 24 mA drive strength sustains signal integrity over 10 cm FR4 traces without termination. |
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 max VCC (3.6 V), no 5 V input tolerance - requires external clamping for 5 V interfaces | Suitable only in pure 3.3 V or lower systems; cannot replace MC74LCX02DTG in mixed-voltage designs | Select when cost is primary and 5 V interface is absent; verify VIH/VIL margins at 1.8 V operation |
| 74AHC02PW,118 | Higher propagation delay (7.5 ns @ 5 V), 5 V-only operation (no 1.65–3.3 V support), higher ICC (20 µA) | Compatible only in 5 V legacy systems; lacks low-voltage flexibility and ultra-low ICC advantage | Choose for drop-in replacement in existing 5 V boards where power budget allows >2× ICC increase |
Compared with SN74LVC02APWR and 74AHC02PW,118, the MC74LCX02DTG uniquely supports 1.65–5.5 V operation with 5 V-tolerant inputs and 10 µA ICC - making it the only option for battery-powered, mixed-voltage, or extended-temperature applications requiring both robustness and efficiency.
Availability
MC74LCX02DTG is available at Aetrix Electronics and suitable for industrial automation, portable medical electronics, and automotive body control applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MC74LCX02DTG 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 silicon and power solutions for automotive, industrial, cloud, and IoT markets.
The MC74LCX02DTG belongs to the LCX low-voltage CMOS logic family, designed specifically for mixed-signal systems requiring interoperability between 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains while minimizing power and board space.
FAQ
What is the maximum input voltage rating for MC74LCX02DTG?
The MC74LCX02DTG supports DC input voltage up to +6.5 V (VI rating), enabling safe interfacing with 5 V TTL outputs without external protection. This 5 V-tolerant feature is maintained across the full operating temperature range (−40 °C to +125 °C) and is validated per datasheet Absolute Maximum Ratings Table.
Can MC74LCX02DTG operate at 1.8 V supply voltage?
Yes, MC74LCX02DTG is fully specified for operation at 1.65 V to 5.5 V, including 1.8 V. At VCC = 1.8 V, it delivers guaranteed VIH = 1.17 V (0.65 × VCC), VIL = 0.63 V (0.35 × VCC), and tPLH/tPHL ≤ 10.3 ns - meeting LVTTL and LVCMOS-1.8 standards per datasheet Recommended Operating Conditions.
Does MC74LCX02DTG have built-in ESD protection?
Yes, MC74LCX02DTG incorporates on-die ESD protection rated to >2000 V per Human Body Model (HBM), as confirmed in the datasheet Features section and Electrical Characteristics table. No external ESD components are required for typical board-level handling and assembly.
What is the thermal resistance (θJA) of MC74LCX02DTG in TSSOP-14 package?
The MC74LCX02DTG in TSSOP-14 (Case 948G) has a thermal resistance θJA of 150 °C/W, measured per JESD51-7 on a standard FR4 board with 76 mm × 114 mm, 2-ounce copper. This value is used to calculate junction temperature rise under load and confirms suitability for high-density layouts without forced airflow.
Is MC74LCX02DTG pin-compatible with other 74-series NOR gates?
MC74LCX02DTG uses standard 14-pin TSSOP layout matching industry-wide 74xx02 footprints (e.g., SOIC-14 and TSSOP-14 variants). Pin functions align exactly with logic diagram and pin assignment in Figure 2 of the datasheet - A0/B0/O0 through A3/B3/O3 plus VCC and GND - enabling direct PCB footprint reuse across compatible logic families.
MC74LCX02DTG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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-TSSOP
MC74LCX02DTG FAQ
1.How can I place an order for MC74LCX02DTG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX02DTG 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 MC74LCX02DTG reliable?
The price and inventory of MC74LCX02DTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX02DTG is usually 5 days.
3.What payment methods are accepted for MC74LCX02DTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX02DTG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX02DTG?
MC74LCX02DTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX02DTG 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 MC74LCX02DTG?
For technical support, including MC74LCX02DTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX02DTG requirements.
6.How does Aetrix verify that MC74LCX02DTG is sourced from the original manufacturer or authorized distributors?
All MC74LCX02DTG 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 MC74LCX02DTG meets industry standards.
7.What is the process for return or replacement of MC74LCX02DTG?
All MC74LCX02DTG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX02DTG, 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 MC74LCX02DTG part is unused and in its original packaging.
Return procedure for MC74LCX02DTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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