CD74HC02M NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HC02M is a 4-channel 2-input NOR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics but remains available through inventory channels. The CD74HC02M operates across a 2V to 6V supply voltage range and is suitable for general-purpose digital logic applications requiring NOR gate functionality. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	15ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Series	74HC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC02M is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be 4-channel, 2-input NOR gate logic ICs within the 74HC series.

Electrical Compatibility: Supply voltage range (2V ~ 6V), quiescent current, output current, input logic levels, and propagation delay must fall within or match the original specification.

Package Compatibility: Surface mount 14-SOIC packaging is required for direct PCB substitution without layout modifications.

Operating Temperature Range: The original part specifies -55°C ~ 125°C. Substitutes with narrower ranges (-40°C ~ 85°C) are acceptable for applications not requiring full military-grade temperature coverage.

Compliance & Status: Active product status is preferred for long-term availability. RoHS3 compliance and MSL rating must be maintained.

Substitute parts are grouped into two categories:

Direct Electrical & Package Equivalents: Parts with identical or superior electrical performance and 14-SOIC packaging (CD74HC02M96, MC74HC02ADR2G, MC74HC02ADG, MM74HC02MX).

Functional Equivalents with Package Variants: Parts with identical logic function but different surface mount package designations (74HC02D,653, 74HC02D-Q100,118 in 14-SO packaging).

Obsolete Parts: NLV74HC02ADR2G is marked obsolete and should not be selected for new designs despite technical compatibility.

Parameter Comparison

Part Number	Manufacturer	Status	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temp	Package	Packaging Type
CD74HC02M	Texas Instruments	Discontinued	2V ~ 6V	2 µA	15ns	-55°C ~ 125°C	14-SOIC	Tube
CD74HC02M96	Texas Instruments	Active	2V ~ 6V	2 µA	15ns	-55°C ~ 125°C	14-SOIC	Cut Tape & Digi-Reel
MC74HC02ADR2G	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	Cut Tape & Digi-Reel
MC74HC02ADG	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	Tube
MM74HC02M	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	14-SOIC	Tube
MM74HC02MX	onsemi	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	14-SOIC	Cut Tape & Digi-Reel
74HC02D,653	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SO	Cut Tape & Digi-Reel
74HC02D-Q100,118	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SO	Tape & Reel
NLV74HC02ADR2G	onsemi	Obsolete	2V ~ 6V	1 µA	19ns	-55°C ~ 125°C	14-SOIC	Not Specified

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification Required):

CD74HC02M96 is the primary substitute. It is manufactured by Texas Instruments, maintains identical electrical specifications, operates across the full -55°C ~ 125°C temperature range, and is available in active status with Cut Tape & Digi-Reel packaging for production volumes.

MC74HC02ADR2G and MC74HC02ADG (onsemi) are functionally equivalent with superior performance characteristics: lower quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns). Both maintain the full -55°C ~ 125°C operating range and 14-SOIC packaging. MC74HC02ADG is available in Tube packaging; MC74HC02ADR2G is available in Cut Tape & Digi-Reel.

For Applications with Reduced Temperature Requirements (-40°C ~ 85°C):

MM74HC02M (Fairchild Semiconductor) and MM74HC02MX (onsemi) are suitable alternatives when the full military temperature range is not required. Both maintain identical electrical performance to the original part.

For High-Volume Production with Automotive Qualification:

74HC02D-Q100,118 (Nexperia USA Inc.) includes AEC-Q100 automotive qualification and is available in Tape & Reel packaging. Operating temperature range extends to -40°C ~ 125°C. Package designation is 14-SO (functionally equivalent to 14-SOIC for this logic family).

Parts to Avoid:

NLV74HC02ADR2G is marked obsolete and should not be selected for new designs despite technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC02D,653 or 74HC02D-Q100,118 as direct replacements for CD74HC02M?

A: Yes, with package consideration. Both parts are functionally equivalent NOR gate ICs with identical logic specifications. The package designation is 14-SO rather than 14-SOIC, but both are 0.154" (3.90mm) width surface mount packages compatible with standard 14-pin SOIC footprints. Verify PCB footprint compatibility before assembly.

Q: What is the difference between MC74HC02ADR2G and MC74HC02ADG?

A: Both are manufactured by onsemi with identical electrical specifications. The primary difference is packaging: MC74HC02ADR2G is supplied in Cut Tape & Digi-Reel format for automated assembly, while MC74HC02ADG is supplied in Tube packaging for manual handling or lower-volume applications.

Q: Why does NLV74HC02ADR2G show lower propagation delay specifications than other parts?

A: NLV74HC02ADR2G is marked obsolete and exhibits a propagation delay of 19ns at 6V with 50pF load, which is slower than the original CD74HC02M specification of 15ns. This part should not be selected for new designs.

Q: Can I substitute a part with a narrower operating temperature range (-40°C ~ 85°C) for the original -55°C ~ 125°C specification?

A: Temperature range substitution depends on application requirements. If your circuit operates only within -40°C ~ 85°C, parts such as MM74HC02M and MM74HC02MX are acceptable. For applications requiring the full military temperature range, select CD74HC02M96, MC74HC02ADR2G, MC74HC02ADG, or 74HC02D,653.

Q: Are all substitute parts RoHS3 compliant?

A: CD74HC02M96, MC74HC02ADR2G, MC74HC02ADG, MM74HC02MX, 74HC02D,653, and 74HC02D-Q100,118 are all RoHS3 compliant. MM74HC02M and NLV74HC02ADR2G do not specify RoHS status in the provided data.

Q: What is the difference between Cut Tape & Digi-Reel and Tube packaging?

A: Cut Tape & Digi-Reel packaging is optimized for high-speed automated assembly lines with pick-and-place equipment. Tube packaging is used for manual assembly, lower-volume production, or component storage. Both contain identical components; packaging format affects handling and assembly methodology only.

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