MM74HC02SJ Equivalent & Substitute Parts

Part Overview

The MM74HC02SJ is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by onsemi in a 14-SOP surface mount package. This logic gate operates across a 2V to 6V supply voltage range and is designed for general-purpose digital logic applications. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

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	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC
Base Product Number	74HC02
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MM74HC02SJ is determined by strict equivalence across the following parameters:

Logic Type: NOR Gate (4 channels, 2 inputs)
Voltage Supply Range: 2V ~ 6V minimum
Current Specifications: Quiescent current ≤ 2 µA; Output current 5.2mA
Input Logic Levels: Low 0.5V ~ 1.8V; High 1.5V ~ 4.2V
Propagation Delay: 15ns @ 6V, 50pF
Mounting Type: Surface Mount
Package Type: 14-SOIC or 14-SO variants
Base Product Number: 74HC02 series

All substitute parts listed maintain these core electrical and functional specifications. Variations in operating temperature range, package dimensions, and product status are noted but do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Operating Temp	Package	Quiescent Current	Output Current	Propagation Delay
MM74HC02SJ	onsemi	Obsolete	2V ~ 6V	-40°C ~ 85°C	14-SOP	2 µA	5.2mA	15ns @ 6V
SN74HC02NSR	Texas Instruments	Active	2V ~ 6V	-40°C ~ 85°C	14-SO	2 µA	5.2mA	15ns @ 6V
74HC02D,653	Nexperia USA Inc.	Active	2V ~ 6V	-40°C ~ 125°C	14-SO	2 µA	5.2mA	15ns @ 6V
CD74HC02M96	Texas Instruments	Active	2V ~ 6V	-55°C ~ 125°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
CD74HC02MT	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	-55°C ~ 125°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
SN74HC02D	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	-40°C ~ 85°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
SN74HC02DR	Texas Instruments	Active	2V ~ 6V	-40°C ~ 85°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
SN74HC02DRG4	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	-40°C ~ 85°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
SN74HC02DT	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	-40°C ~ 85°C	14-SOIC	2 µA	5.2mA	15ns @ 6V
SN74HC02QDRQ1	Texas Instruments	Active	2V ~ 6V	-40°C ~ 125°C	14-SOIC	2 µA	5.2mA	15ns @ 6V

Engineering Selection Recommendations

For new designs and ongoing procurement, select from parts with Active product status to ensure long-term availability and manufacturer support. SN74HC02NSR (Texas Instruments, Active) and SN74HC02DR (Texas Instruments, Active) are primary recommendations due to their active status and full compliance with RoHS3 and REACH requirements.

For applications requiring extended temperature range operation, CD74HC02M96 (-55°C ~ 125°C) and SN74HC02QDRQ1 (-40°C ~ 125°C) provide enhanced thermal performance. The SN74HC02QDRQ1 includes AEC-Q100 automotive qualification and is suitable for automotive-grade applications.

The 74HC02D,653 (Nexperia USA Inc., Active) offers the widest operating temperature range (-40°C ~ 125°C) among standard commercial variants and maintains full active status with high inventory availability.

All listed substitutes maintain electrical equivalence within the specified parameter envelope and are suitable for direct replacement in applications designed for the MM74HC02SJ.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC02NSR as a direct replacement for MM74HC02SJ?

A: Yes. Both parts share identical electrical specifications: 4-channel NOR gate, 2V ~ 6V supply, 2 µA quiescent current, 5.2mA output current, and 15ns propagation delay. The primary difference is packaging format (14-SO vs. 14-SOP) and product status (Active vs. Obsolete). Verify PCB footprint compatibility before substitution.

Q: What is the difference between 14-SOP, 14-SO, and 14-SOIC packages?

A: These are surface mount package variants with identical pin counts and electrical performance. 14-SOP and 14-SO refer to Small Outline Package formats, while 14-SOIC is Small Outline Integrated Circuit. Physical dimensions vary slightly between manufacturers. Confirm PCB footprint compatibility with your design documentation before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part has the best long-term availability?

A: SN74HC02NSR (Texas Instruments, Active status) and SN74HC02DR (Texas Instruments, Active status) are recommended for long-term availability. The 74HC02D,653 (Nexperia USA Inc.) also maintains Active status with significantly higher inventory levels (990,300 pcs).

Q: Can I use parts with different operating temperature ranges interchangeably?

A: Yes, within your application's temperature requirements. If your design operates within -40°C ~ 85°C, any substitute part listed is suitable. For applications requiring extended temperature operation, select parts rated to -55°C ~ 125°C such as CD74HC02M96 or SN74HC02QDRQ1.

Q: What does "Discontinued at DiGi Electronics" mean for product status?

A: This indicates the part is no longer actively distributed through DiGi Electronics but may remain available through other channels or directly from manufacturers. For new designs, prioritize parts with Active status to ensure consistent long-term supply.

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