74LVC02ADR2G Equivalent & Substitute Parts

Part Overview

The 74LVC02ADR2G is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-SOIC surface mount package, manufactured by onsemi. This logic gate is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity. The 74LVC series operates across a supply voltage range of 1.2V to 3.6V, making it suitable for low-voltage digital applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC02ADR2G
Manufacturer	onsemi
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Package / Case	14-SOIC (0.154", 3.90mm Width)
Voltage - Supply	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74LVC02ADR2G is determined by the following critical parameters:

Logic Function: Both parts must implement identical 4-channel NOR gate functionality with 2 inputs per channel
Package Type: Physical compatibility requires identical 14-SOIC surface mount packaging with matching pin configuration
Supply Voltage Range: The substitute must operate within the application's specified voltage window
Output Drive Capability: Current output specifications (High/Low) must meet or exceed application requirements
Propagation Delay: Maximum delay specifications must satisfy timing constraints
Operating Temperature Range: The substitute must cover the required temperature envelope
Compliance Standards: RoHS3 and REACH compliance must be maintained

The MC74LCX02DR2G qualifies as a direct substitute based on matching logic function, identical package, compatible electrical characteristics, and equivalent compliance certifications.

Parameter Comparison

Parameter	74LVC02ADR2G	MC74LCX02DR2G	Compatibility Notes
Manufacturer	onsemi	onsemi	Same manufacturer
Logic Type	NOR Gate	NOR Gate	Identical function
Number of Circuits	4	4	Identical
Number of Inputs	2	2	Identical
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	Pin-compatible
Voltage - Supply	1.2V ~ 3.6V	2V ~ 3.6V	Substitute range is subset; compatible at 2V ~ 3.6V
Current - Quiescent (Max)	40 µA	10 µA	Substitute has lower quiescent current
Current - Output High, Low	24mA, 24mA	24mA, 24mA	Identical drive capability
Input Logic Level - Low	0.12V ~ 0.8V	0.7V ~ 0.8V	Substitute range is subset; compatible at 0.7V ~ 0.8V
Input Logic Level - High	1.08V ~ 2V	1.7V ~ 2V	Substitute range is subset; compatible at 1.7V ~ 2V
Max Propagation Delay @ V, Max CL	5.5ns @ 3.3V, 50pF	5.5ns @ 3.3V, 50pF	Identical timing specification
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	Substitute range is subset; compatible at -40°C ~ 85°C
Product Status	Obsolete	Active	Substitute is actively manufactured
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent compliance
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent compliance

Engineering Selection Recommendations

The MC74LCX02DR2G is the qualified substitute for the obsolete 74LVC02ADR2G based on the following engineering criteria:

Functional Equivalence: Both parts implement identical 4-channel NOR gate logic with 2 inputs per channel and matching pin configurations in the 14-SOIC package.

Electrical Compatibility: The MC74LCX02DR2G operates within the 2V to 3.6V supply range, which encompasses the typical 3.3V operating point of the original part. Output drive capability (24mA/24mA) is identical. Propagation delay specifications match at 5.5ns @ 3.3V, 50pF.

Compliance Status: The MC74LCX02DR2G maintains ROHS3 and REACH compliance equivalent to the original part, ensuring regulatory continuity.

Active Production: The substitute is actively manufactured with 2700 units in stock, providing procurement reliability compared to the obsolete original.

Design Considerations: Applications operating below 2V supply voltage or above 85°C ambient temperature require verification that the MC74LCX02DR2G meets specific design constraints, as its operating ranges are subsets of the original part's specifications.

Frequently Asked Questions (FAQ)

Q: Can the MC74LCX02DR2G directly replace the 74LVC02ADR2G in existing designs?

A: Yes, for applications operating within the MC74LCX02DR2G's specified ranges (2V ~ 3.6V supply, -40°C ~ 85°C ambient). The identical logic function, pin configuration, package type, and electrical drive characteristics ensure functional compatibility. Designs requiring operation below 2V or above 85°C must be evaluated separately.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete vs. active), supply voltage range (1.2V ~ 3.6V vs. 2V ~ 3.6V), quiescent current (40 µA vs. 10 µA), and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). The MC74LCX02DR2G offers lower power consumption but narrower operating ranges.

Q: Are the packages physically identical?

A: Yes. Both parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package with identical pin assignments, enabling direct PCB footprint compatibility.

Q: What is the significance of the 74LVC vs. 74LCX series designation?

A: The series designation indicates the logic family. The 74LVC02ADR2G belongs to the 74LVC family, while the MC74LCX02DR2G belongs to the 74LCX family. Both are low-voltage CMOS logic families from onsemi with compatible electrical characteristics for this application.

Q: Does the lower quiescent current of the substitute affect circuit performance?

A: No. The 10 µA quiescent current of the MC74LCX02DR2G is lower than the original 40 µA, which reduces power consumption without affecting logic function or output drive capability. This represents an improvement for battery-powered or low-power applications.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical ROHS3 and REACH compliance status, ensuring regulatory equivalence for applications subject to these standards.

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