MM74HC02N NOR Gate IC Equivalent & Substitute Parts

Part Overview

The MM74HC02N is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-MDIP packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MM74HC02N operates across a 2V to 6V supply voltage range and is suitable for digital logic applications requiring NOR gate functionality in through-hole mounting configurations.

Substiute Parts

MM74HC02N

onsemiIn Stock: 2327MM74HC02N Datasheet

Current PartRFQ

CD74HC02E

Harris CorporationIn Stock: 2900CD74HC02E Datasheet

DirectRFQ

SN74HC02N

Texas InstrumentsIn Stock: 1337SN74HC02N Datasheet

DirectRFQ

TC74HC02APF

Toshiba Semiconductor and StorageIn Stock: 7956TC74HC02APF Datasheet

SimilarRFQ

SN74HC02NE4

Texas InstrumentsIn Stock: 1099SN74HC02NE4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM74HC02N are qualified based on the following criteria:

Core Functional Parameters (Must Match):

• Logic Type: NOR Gate
• Number of Circuits: 4
• Number of Inputs: 2
• Voltage - Supply: 2V ~ 6V
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Series: 74HC

Electrical Parameters (Must Match or Exceed):

• 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 Conditions (Must Support):

• Operating Temperature: -40°C ~ 85°C minimum

Substitute parts are categorized as Direct, Similar, or Parametric Equivalent based on the degree of parameter alignment with the MM74HC02N.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Substitutes:

SN74HC02N (Texas Instruments) and CD74HC02E (Harris Corporation) are direct functional equivalents with identical electrical parameters to the MM74HC02N. SN74HC02N is preferred for new designs due to its Active product status and ROHS3 compliance, providing long-term availability and regulatory alignment. CD74HC02E remains available but carries Obsolete status and RoHS non-compliance, limiting suitability for new applications.

Similar Substitute:

TC74HC02APF (Toshiba Semiconductor and Storage) meets all functional requirements with superior performance characteristics: quiescent current of 1 µA (versus 2 µA) and propagation delay of 13ns (versus 15ns). This part is Active and ROHS3 compliant. The extended operating temperature range of -55°C ~ 125°C provides additional thermal margin beyond the MM74HC02N specification.

Parametric Equivalent:

SN74HC02NE4 (Texas Instruments) is a parametric equivalent with identical electrical specifications to the MM74HC02N. This variant is Active and ROHS3 compliant, suitable for direct replacement in existing designs.

For procurement of new equipment, SN74HC02N or TC74HC02APF are recommended due to Active product status and full regulatory compliance. For legacy system maintenance, CD74HC02E or SN74HC02NE4 provide functional continuity with the original MM74HC02N design.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC02N as a direct replacement for MM74HC02N?

A: Yes. SN74HC02N is a direct functional equivalent with matching electrical parameters, supply voltage range, logic configuration, and package type. Both operate across -40°C to 85°C and support identical input/output specifications.

Q: What is the difference between TC74HC02APF and the other substitutes?

A: TC74HC02APF offers improved performance with lower quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns). It also provides an extended operating temperature range of -55°C to 125°C. All other electrical and functional parameters remain equivalent.

Q: Why is CD74HC02E listed as a substitute if it is RoHS non-compliant?

A: CD74HC02E meets all functional and electrical requirements for direct substitution. However, its RoHS non-compliance and Obsolete status make it unsuitable for new designs. It remains available for legacy system support where regulatory requirements do not apply.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use 14-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical and electrical compatibility with MM74HC02N footprints and socket configurations.

Q: Which substitute should I choose for a new design?

A: SN74HC02N is recommended for new designs. It is Active, ROHS3 compliant, and provides long-term availability. TC74HC02APF is an alternative if improved performance characteristics (lower power consumption and faster propagation delay) are beneficial to the application.

Q: Do all substitutes support the same supply voltage range?

A: Yes. All substitute parts operate across the 2V to 6V supply voltage range specified for the MM74HC02N, ensuring compatibility with existing power supply designs.

Q: What is the significance of the 74HC series designation?

A: The 74HC series indicates high-speed CMOS logic technology. All listed parts belong to this series, ensuring consistent logic family characteristics, voltage thresholds, and timing specifications across manufacturers.