SN74HC02NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC02NG4 is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-PDIP package. Manufactured by Texas Instruments, this logic component operates across a 2V to 6V supply voltage range and is designed for Through Hole mounting applications. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs.

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	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
Base Product Number	74HC02
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74HC02NG4 are qualified based on the following critical parameters:

Logic Type: NOR Gate with identical 4-channel, 2-input configuration
Voltage Supply Range: 2V ~ 6V compatibility
Output Current Capability: 5.2mA minimum for both high and low states
Input Logic Levels: Matching threshold specifications (Low: 0.5V ~ 1.8V, High: 1.5V ~ 4.2V)
Operating Temperature Range: -40°C ~ 85°C
Package Type: 14-DIP Through Hole mounting
Base Product Series: 74HC logic family

All identified substitutes maintain functional and electrical equivalence within these defined parameters. Variations in quiescent current and propagation delay do not affect substitutability when the specified maximums are not exceeded.

Parameter Comparison

Parameter	SN74HC02NG4 (Main)	SN74HC02N (Substitute)	TC74HC02APF (Substitute)
Manufacturer	Texas Instruments	Texas Instruments	Toshiba Semiconductor and Storage
Logic Type	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4
Number of Inputs	2	2	2
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	1 µA
Current - Output High, Low	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	15ns	15ns	13ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Base Product Number	74HC02	74HC02	74HC02
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active

Engineering Selection Recommendations

SN74HC02N is the primary substitute from Texas Instruments. This part maintains identical electrical specifications to the SN74HC02NG4 and carries Active product status, ensuring continued availability and supply chain stability. Both parts are ROHS3 compliant and share the same base product number within the 74HC logic family.

TC74HC02APF from Toshiba Semiconductor and Storage is a qualified alternative with Active product status. This substitute demonstrates superior performance characteristics, including reduced quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns at 6V, 50pF). All critical electrical parameters remain within specification for direct substitution. ROHS3 compliance and identical package configuration ensure mechanical and functional compatibility.

Both substitutes are suitable for applications requiring the SN74HC02NG4 functionality. Selection between them may be based on supplier availability, lead time, or performance optimization requirements within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can SN74HC02N be used as a direct replacement for SN74HC02NG4?

A: Yes. Both parts share identical logic configuration (4-channel NOR gate with 2 inputs), electrical specifications (2V ~ 6V supply, 5.2mA output current, matching input logic levels), operating temperature range (-40°C ~ 85°C), and 14-DIP package dimensions. The primary difference is product status: SN74HC02N is Active while SN74HC02NG4 is discontinued.

Q: What is the difference between SN74HC02N and TC74HC02APF?

A: Both are functionally equivalent NOR gate ICs with identical logic configuration and package type. TC74HC02APF offers improved performance with lower quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns). All critical electrical parameters remain compatible for substitution purposes.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use 14-DIP (0.300", 7.62mm) Through Hole packages, ensuring identical PCB footprint and mounting compatibility.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. SN74HC02N and TC74HC02APF are both ROHS3 compliant, matching the compliance status of the original SN74HC02NG4.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, within the specified electrical and mechanical parameters. All three parts operate across the same supply voltage range (2V ~ 6V), support identical input/output logic levels, and maintain the same operating temperature range (-40°C ~ 85°C). Pin configuration and package type are identical.

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