74HC02DR2G NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC02DR2G is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74HC02 series represents a standard logic function across multiple manufacturers, with several active alternatives available that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Specification
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Quiescent Current (Max)	2 µA
Output Current (High/Low)	5.2 mA / 5.2 mA
Input Logic Level Low	0.5V to 1.8V
Input Logic Level High	1.5V to 4.2V
Max Propagation Delay	13ns @ 6V, 50pF
Operating Temperature	-55°C to 125°C
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74HC02DR2G is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Logic type: 4-channel 2-input NOR gate
Supply voltage range: 2V to 6V minimum
Package: 14-SOIC surface mount
Input/output logic levels and current specifications
Operating temperature range compatibility

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts with identical or superior electrical specifications, including quiescent current, propagation delay, and temperature range. MC74HC02ADR2G qualifies as a parametric equivalent with 1 µA quiescent current (lower than the 2 µA maximum) and matching -55°C to 125°C operating range.

Similar Substitutes: Parts meeting all critical electrical parameters but with minor variations in propagation delay (15ns vs. 13ns) or operating temperature range (-40°C to 85°C or -40°C to 125°C). These include MM74HC02M, MM74HC02MX, 74HC02D,653, 74HC02D-Q100,118, 74HC02D/AUJ, CD74HC02M96, CD74HC02MT, SN74HC02D, and SN74HC02DR.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Package	Inventory
74HC02DR2G	onsemi	Obsolete	2 µA	13ns	-55°C to 125°C	14-SOIC	5785 Pcs
MC74HC02ADR2G	onsemi	Active	1 µA	13ns	-55°C to 125°C	14-SOIC	7779 Pcs
MM74HC02M	Fairchild Semiconductor	Active	2 µA	15ns	-40°C to 85°C	14-SOIC	3072 Pcs
MM74HC02MX	onsemi	Active	2 µA	15ns	-40°C to 85°C	14-SOIC	16095 Pcs
74HC02D,653	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SO	990300 Pcs
74HC02D-Q100,118	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SO	3241 Pcs
74HC02D/AUJ	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SO	736 Pcs
CD74HC02M96	Texas Instruments	Active	2 µA	15ns	-55°C to 125°C	14-SOIC	7259 Pcs
CD74HC02MT	Texas Instruments	Discontinued at DiGi Electronics	2 µA	15ns	-55°C to 125°C	14-SOIC	1175 Pcs
SN74HC02D	Texas Instruments	Discontinued at DiGi Electronics	2 µA	15ns	-40°C to 85°C	14-SOIC	1125 Pcs
SN74HC02DR	Texas Instruments	Active	2 µA	15ns	-40°C to 85°C	14-SOIC	2125 Pcs

Engineering Selection Recommendations

Primary Recommendation: MC74HC02ADR2G (onsemi) is the optimal substitute. It is manufactured by the same supplier as the original part, maintains active product status, offers superior quiescent current performance (1 µA vs. 2 µA), and covers the full -55°C to 125°C operating temperature range with 13ns propagation delay. This part provides direct functional replacement with enhanced specifications.

Secondary Recommendations for Extended Temperature Range: CD74HC02M96 (Texas Instruments) and CD74HC02MT (Texas Instruments) both support -55°C to 125°C operation in 14-SOIC packaging. CD74HC02M96 is currently active with higher inventory availability. Both parts carry RoHS3 compliance and REACH unaffected status.

High-Volume Availability Option: 74HC02D,653 (Nexperia USA Inc.) offers the highest inventory level (990,300 pcs) with active status and -40°C to 125°C operating range. This part is available in 14-SO packaging, which is mechanically compatible with 14-SOIC footprints. RoHS3 compliant.

Automotive-Grade Alternative: 74HC02D-Q100,118 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards with active status, suitable for applications requiring automotive-grade components.

Restricted Temperature Range Alternatives: MM74HC02MX (onsemi) and SN74HC02DR (Texas Instruments) are suitable only for applications with -40°C to 85°C operating requirements. Both are active with adequate inventory.

Frequently Asked Questions (FAQ)

Q: Can MC74HC02ADR2G directly replace 74HC02DR2G without circuit modifications?

A: Yes. MC74HC02ADR2G is a parametric equivalent with identical logic function, pin configuration, package type (14-SOIC), and electrical specifications. The 1 µA quiescent current is lower than the 2 µA maximum of the original part, representing improved performance. No circuit modifications are required.

Q: What is the difference between 14-SOIC and 14-SO packaging?

A: Both are surface mount packages with identical pin pitch and footprint compatibility. 14-SOIC and 14-SO refer to the same physical package type with 0.154" (3.90mm) width. Parts specified as 14-SO are mechanically interchangeable with 14-SOIC in PCB layouts.

Q: Why do some substitutes have 15ns propagation delay instead of 13ns?

A: Propagation delay variation within the 74HC02 family is a result of different manufacturing processes and test conditions across suppliers. A 15ns delay remains within acceptable logic timing for most applications. Verify timing requirements in your specific circuit design before selection.

Q: Are all listed substitutes RoHS3 compliant?

A: All active substitute parts listed carry RoHS3 compliance certification. The original 74HC02DR2G does not specify RoHS status in the provided data. Verify RoHS compliance requirements for your application.

Q: Which substitute offers the best availability?

A: 74HC02D,653 (Nexperia USA Inc.) has the highest inventory at 990,300 pcs with active product status. MM74HC02MX (onsemi) offers 16,095 pcs. Both are suitable for high-volume production requirements.

Q: Can I use SN74HC02D or CD74HC02MT if my application requires -55°C operation?

A: SN74HC02D is limited to -40°C to 85°C and is not suitable for -55°C operation. CD74HC02MT supports -55°C to 125°C but is discontinued at DiGi Electronics. For -55°C applications, use MC74HC02ADR2G, CD74HC02M96, or 74HC02D,653 (which supports -40°C to 125°C).

Q: What is the significance of the AEC-Q100 qualification on 74HC02D-Q100,118?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This variant is suitable for automotive applications requiring certified components. Non-automotive applications do not require this qualification.

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