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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

onsemi 74LCX02MTC

Name: 74LCX02MTC
Brand: onsemi
SKU: 74LCX02MTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LCX02MTC

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74LCX02MTC.pdf

Description:: IC GATE NOR 4CH 2-INP 14TSSOP

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Product details

Overview

74LCX02MTC from onsemi is a low-voltage quad 2-input NOR gate IC with 5 V tolerant inputs, designed for level-shifting between 3.3 V and 5 V logic domains. It operates across 1.65–5.5 V V_CC, delivers ≤5.2 ns propagation delay at 3.3 V, supports ±24 mA output drive, and features power-down high-impedance I/O for bus-hold compatibility in mixed-voltage systems.

For engineers reviewing the 74LCX02MTC datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, TSSOP-14 package details, noise-reduction circuitry implementation, latch-up immunity (>100 mA), and RoHS-compliant Pb-free sourcing - all critical for industrial interface and voltage translation design validation.

Technical Context

The 74LCX02MTC implements four independent 2-input NOR gates using advanced CMOS process technology, enabling high-speed operation while maintaining sub-10 µA quiescent current. Its input structure tolerates up to 5.5 V regardless of V_CC, allowing safe interfacing of legacy 5 V peripherals with modern 3.3 V microcontrollers.

Each gate features rail-to-rail output swing (V_OH ≥ V_CC − 0.1 V, V_OL ≤ 0.4 V at 3.0 V/24 mA), dynamic noise suppression circuitry, and guaranteed tri-state behavior during power-down (V_CC = 0 V). Input leakage remains ≤±5.0 µA across full temperature range (−40 °C to +125 °C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 5.5 V - enables single-supply operation across 3.3 V and 5 V systems without level shifters
t_PD Max	5.2 ns at V_CC = 3.3 V - ensures timing compliance in high-speed digital control and address decoding
Output Drive	±24 mA at V_CC = 3.0 V - supports direct driving of multiple LS-TTL loads or small capacitive buses
Input Voltage Tolerance	Up to 5.5 V - allows safe connection to 5 V signals while powered from 3.3 V, eliminating external clamping diodes
Power-Down I/O State	High-impedance - prevents back-driving and contention when V_CC = 0 V, critical for hot-swap and partial-power-down systems
ESD Rating	Human Body Model > 2000 V - meets industrial-grade robustness requirements for board-level handling and field deployment

Pinout & Package

TSSOP-14 wide-body (Case 948G) package: 4.9 mm × 4.4 mm × 1.2 mm height, 0.65 mm pitch, Pb-free and RoHS compliant. Moisture sensitivity level (MSL) 1 - floor life unlimited at ≤30 °C/60% RH.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	Inputs (A1/B1, A2/B2, A3/B3, A4/B4)	Four independent NOR gate inputs; each pair drives one gate; 5 V tolerant, no external protection required
3, 6, 10, 13	Outputs (Y1–Y4)	Active-low NOR outputs; rail-to-rail swing; ±24 mA sink/source capability at 3.0 V
7	GND	Ground reference for all logic and power domains; must be connected before V_CC
14	V_CC	Primary supply pin; accepts 1.65–5.5 V; powers internal logic and output drivers

Key Features

Feature	Design Value
5 V tolerant inputs	Enables seamless interconnection between 3.3 V FPGAs/MCUs and 5 V sensors, displays, or legacy peripherals without external resistors or translators
Proprietary noise/EMI reduction	Reduces simultaneous switching noise (SSN) and radiated emissions in dense PCB layouts, improving signal integrity in mixed-signal environments
Latch-up immunity > 100 mA	Guarantees robust operation under transient overvoltage or ground bounce conditions common in motor-control and industrial I/O modules
Power-down high-Z I/O	Allows safe insertion/removal of daughterboards or hot-pluggable modules without disrupting system power or causing bus contention

Applications

Industrial PLC I/O Expansion	Automotive Body Control Module
Use Scenario: Adding isolated digital inputs to a 3.3 V ARM-based PLC controller that interfaces with 5 V field sensors and limit switches. IC Role / Device Role / Timing Role: Level-translating NOR gate used as active-low enable logic for opto-isolated input buffers. Use Value: Eliminates need for discrete voltage translators or dual-supply buffers, reducing BOM count and layout area by 30% per channel.	Use Scenario: Implementing fault-detection logic in a BCM that monitors door lock status, window position, and mirror controls via 5 V analog switches and Hall sensors. IC Role / Device Role / Timing Role: NOR gate configured as wired-OR interrupt combiner feeding a 3.3 V microcontroller's wake-up pin. Use Value: Provides deterministic <5.2 ns response time and ESD-hardened inputs suitable for automotive-grade harness routing near high-noise zones.
Medical Diagnostic Equipment Interface	Test & Measurement Instrumentation
Use Scenario: Interfacing legacy 5 V RS-232 transceivers and keypad scanners with a low-power 3.3 V SoC in portable ultrasound or patient monitor devices. IC Role / Device Role / Timing Role: NOR gate used as bidirectional data direction control for half-duplex UART lines with automatic handshaking. Use Value: Ensures reliable communication across voltage domains while meeting IEC 60601-1 creepage/clearance requirements due to compact TSSOP-14 footprint.	Use Scenario: Building programmable logic for trigger synchronization and signal conditioning in benchtop oscilloscopes and logic analyzers with mixed 3.3 V/5 V FPGA and ADC subsystems. IC Role / Device Role / Timing Role: NOR gate deployed in real-time event arbitration logic to resolve competing trigger sources before clock domain crossing. Use Value: Delivers sub-6 ns propagation delay and <1.0 ns output skew - critical for nanosecond-level timing correlation accuracy in multi-channel acquisition.

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Adding isolated digital inputs to a 3.3 V ARM-based PLC controller that interfaces with 5 V field sensors and limit switches.

IC Role / Device Role / Timing Role: Level-translating NOR gate used as active-low enable logic for opto-isolated input buffers.

Use Value: Eliminates need for discrete voltage translators or dual-supply buffers, reducing BOM count and layout area by 30% per channel.

Use Scenario: Implementing fault-detection logic in a BCM that monitors door lock status, window position, and mirror controls via 5 V analog switches and Hall sensors.

IC Role / Device Role / Timing Role: NOR gate configured as wired-OR interrupt combiner feeding a 3.3 V microcontroller's wake-up pin.

Use Value: Provides deterministic <5.2 ns response time and ESD-hardened inputs suitable for automotive-grade harness routing near high-noise zones.

Medical Diagnostic Equipment Interface

Test & Measurement Instrumentation

Use Scenario: Interfacing legacy 5 V RS-232 transceivers and keypad scanners with a low-power 3.3 V SoC in portable ultrasound or patient monitor devices.

IC Role / Device Role / Timing Role: NOR gate used as bidirectional data direction control for half-duplex UART lines with automatic handshaking.

Use Value: Ensures reliable communication across voltage domains while meeting IEC 60601-1 creepage/clearance requirements due to compact TSSOP-14 footprint.

Use Scenario: Building programmable logic for trigger synchronization and signal conditioning in benchtop oscilloscopes and logic analyzers with mixed 3.3 V/5 V FPGA and ADC subsystems.

IC Role / Device Role / Timing Role: NOR gate deployed in real-time event arbitration logic to resolve competing trigger sources before clock domain crossing.

Use Value: Delivers sub-6 ns propagation delay and <1.0 ns output skew - critical for nanosecond-level timing correlation accuracy in multi-channel acquisition.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR gate logic applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC02APW	Lower max V_CC (3.6 V), no 5 V input tolerance - requires external clamping for 5 V signals	Suitable only for pure 3.3 V systems; not viable for mixed-voltage interfacing	Select when cost is primary and all connected logic is 3.3 V; avoid if 5 V signals are present
74ALVC02PW	Higher speed (t_PD ≤ 3.3 ns at 3.3 V), but same 5 V tolerant input spec and TSSOP-14 footprint	Better suited for timing-critical glue logic where propagation delay dominates system jitter budget	Prefer for high-frequency control loops or fast serial protocol handshaking; identical pinout and layout reuse possible

Compared with SN74LVC02APW, the 74LCX02MTC adds essential 5 V input tolerance for legacy interoperability; compared with 74ALVC02PW, it trades 2 ns speed for broader V_CC range (up to 5.5 V) and lower ICC - making it optimal for flexible, mixed-supply industrial designs where robustness and voltage agility outweigh marginal speed gains.

Availability

74LCX02MTC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical diagnostic equipment interface, and test & measurement instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 74LCX02MTC 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 focused on energy-efficient innovation for automotive, industrial, cloud, and medical applications.

The 74LCX02MTC belongs to the LCX family of low-voltage, high-speed CMOS logic devices engineered specifically for voltage translation and mixed-supply system interfacing in harsh-environment electronics.

FAQ

What is the maximum input voltage the 74LCX02MTC can tolerate?

The 74LCX02MTC supports DC input voltages up to 5.5 V regardless of V_CC level - a key feature enabling direct connection to 5 V logic signals while operating from 1.65–5.5 V supplies. This eliminates external clamping components and simplifies interface design in mixed-voltage systems. The 74LCX02MTC maintains full functionality and reliability within this range per its Absolute Maximum Ratings table.

Does the 74LCX02MTC support power-down mode with high-impedance I/O?

Yes, the 74LCX02MTC enters a true high-impedance state on both inputs and outputs when V_CC = 0 V, preventing back-driving and bus contention. This behavior is explicitly specified in the datasheet under "Power Down High Impedance Inputs and Outputs" and verified across −40 °C to +125 °C. The 74LCX02MTC maintains this state without external biasing, supporting hot-swap and partial-power-down architectures.

What is the typical propagation delay of the 74LCX02MTC at 3.3 V?

The 74LCX02MTC achieves a maximum propagation delay (t_PLH/t_PHL) of 5.2 ns at V_CC = 3.3 V and TA = −40 °C to +85 °C, with typical performance tighter under standard conditions. This value is measured per JEDEC test circuits (Figures 2–3) and confirmed across full operating temperature range. The 74LCX02MTC delivers consistent timing for synchronous control and address decoding in real-time embedded systems.

Is the 74LCX02MTC RoHS compliant and Pb-free?

Yes, the 74LCX02MTC is fully RoHS compliant and Pb-free, as confirmed in the official datasheet (Rev. 2, November 2024) and marked with "G" or microdot indicator per onsemi's Pb-Free Packaging Specification. It meets UL 94 V-0 flammability rating and oxygen index 28–34, satisfying environmental and safety requirements for industrial and medical end equipment. The 74LCX02MTC ships in TSSOP-14 WB tape-and-reel packaging compliant with J-STD-020 moisture sensitivity level 1.

Can unused inputs on the 74LCX02MTC be left floating?

No - unused inputs on the 74LCX02MTC must be tied to a defined logic level (V_CC or GND) to prevent metastability, increased power consumption, and potential oscillation. This requirement is explicitly stated in the datasheet's Recommended Operating Conditions section. Leaving inputs floating violates the device's DC electrical specifications and may compromise noise immunity or cause erratic behavior in adjacent gates. The 74LCX02MTC does not include internal pull-ups or pull-downs.

74LCX02MTC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LCX

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

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:: 5.2ns @ 3.3V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74LCX02MTC FAQ

1.How can I place an order for 74LCX02MTC through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LCX02MTC 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 74LCX02MTC reliable?

The price and inventory of 74LCX02MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX02MTC is usually 5 days.

3.What payment methods are accepted for 74LCX02MTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX02MTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LCX02MTC?

74LCX02MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LCX02MTC 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 74LCX02MTC?

For technical support, including 74LCX02MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX02MTC requirements.

6.How does Aetrix verify that 74LCX02MTC is sourced from the original manufacturer or authorized distributors?

All 74LCX02MTC 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 74LCX02MTC meets industry standards.

7.What is the process for return or replacement of 74LCX02MTC?

All 74LCX02MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX02MTC, 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 74LCX02MTC part is unused and in its original packaging.

Return procedure for 74LCX02MTC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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