CD74HC02ME4 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HC02ME4 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, making equivalent substitute parts necessary for ongoing design and production requirements. The 74HC02 series represents a standard logic function across multiple manufacturers, enabling direct functional substitution based on electrical and mechanical parameter alignment.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the CD74HC02ME4 is determined by strict alignment of the following parameters:

Logic function: 4-channel 2-input NOR gate
Electrical specifications: Supply voltage 2V–6V, output current 5.2mA, propagation delay characteristics
Package type: 14-SOIC surface mount form factor
Compliance: ROHS3, MSL Level 1

Substitute parts are grouped into two categories based on product status and operational temperature range:

Active Status Parts maintain full availability and current manufacturing support. These include CD74HC02M96 (Texas Instruments), MC74HC02ADR2G (onsemi), 74HC02D,653 (Nexperia), and MM74HC02MX (onsemi).

Temperature-Constrained Parts operate within narrower temperature ranges (-40°C to 85°C or -40°C to 125°C) compared to the original part's -55°C to 125°C specification. These include MM74HC02M (Fairchild Semiconductor) and MC74HC02ADG (onsemi).

Automotive-Qualified Parts include AEC-Q100 certification for automotive applications: 74HC02D-Q100,118 (Nexperia) and NLV74HC02ADR2G (onsemi, obsolete status).

Parameter Comparison

Part Number	Manufacturer	Status	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temp Range	Package	Packaging Type
CD74HC02ME4	Texas Instruments	Discontinued	2 µA	15ns	-55°C to 125°C	14-SOIC	Surface Mount
CD74HC02M96	Texas Instruments	Active	2 µA	15ns	-55°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
MC74HC02ADR2G	onsemi	Active	1 µA	13ns	-55°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
74HC02D,653	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
74HC02D-Q100,118	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SOIC	Tape & Reel
MC74HC02ADG	onsemi	Active	1 µA	13ns	-55°C to 125°C	14-SOIC	Tube
MM74HC02M	Fairchild Semiconductor	Active	2 µA	15ns	-40°C to 85°C	14-SOIC	Surface Mount
MM74HC02MX	onsemi	Active	2 µA	15ns	-40°C to 85°C	14-SOIC	Cut Tape & Digi-Reel
NLV74HC02ADR2G	onsemi	Obsolete	1 µA	19ns	-55°C to 125°C	14-SOIC	Surface Mount

Engineering Selection Recommendations

Primary Substitutes for Full Compatibility:

CD74HC02M96 (Texas Instruments) and MC74HC02ADR2G (onsemi) provide direct functional equivalence with identical or superior electrical performance. Both maintain the full -55°C to 125°C operating range and are actively manufactured. MC74HC02ADR2G offers improved quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns).

Manufacturer-Specific Alternatives:

74HC02D,653 (Nexperia) is manufacturer-recommended and maintains active production status with high inventory availability. Operating temperature range is constrained to -40°C to 125°C. For automotive applications requiring AEC-Q100 qualification, 74HC02D-Q100,118 (Nexperia) is the designated option.

Temperature-Limited Substitutes:

MM74HC02M (Fairchild Semiconductor) and MM74HC02MX (onsemi) are suitable only for applications with maximum operating temperature requirements of 85°C. These parts are not appropriate for designs requiring the full -55°C to 125°C range of the original CD74HC02ME4.

Obsolete Parts:

NLV74HC02ADR2G (onsemi) carries obsolete status and should not be selected for new designs despite AEC-Q100 automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can I substitute CD74HC02M96 for CD74HC02ME4 in my existing design?

A: Yes. CD74HC02M96 maintains identical electrical specifications, operating temperature range (-55°C to 125°C), and 14-SOIC package format. The primary difference is packaging type (Cut Tape & Digi-Reel vs. original surface mount specification).

Q: What is the difference between MC74HC02ADR2G and CD74HC02M96?

A: Both are functionally equivalent NOR gate ICs in 14-SOIC packaging. MC74HC02ADR2G (onsemi) offers lower quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns). Both support the full -55°C to 125°C operating range.

Q: Can I use MM74HC02MX in a design requiring -55°C operation?

A: No. MM74HC02MX operates only from -40°C to 85°C. For applications requiring -55°C minimum operating temperature, select CD74HC02M96, MC74HC02ADR2G, MC74HC02ADG, or 74HC02D,653.

Q: What does AEC-Q100 qualification mean for 74HC02D-Q100,118?

A: AEC-Q100 certification indicates the part meets automotive industry reliability and quality standards. This variant is appropriate for automotive applications; non-automotive designs do not require this qualification.

Q: Are all substitute parts in 14-SOIC packaging?

A: Yes. All listed substitutes use 14-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical compatibility with the original CD74HC02ME4 footprint.

Q: Why is NLV74HC02ADR2G listed if it is obsolete?

A: NLV74HC02ADR2G is included for reference in existing designs currently using this part. For new designs, select from active status alternatives.

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