DM74S02N Equivalent & Substitute Parts

Part Overview

The DM74S02N is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-MDIP package, manufactured by onsemi. This logic gate is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Substiute Parts

DM74S02N

onsemiIn Stock: 1853DM74S02N Datasheet

Current PartRFQ

SN74S02N

Texas InstrumentsIn Stock: 2217SN74S02N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74S02N is determined by strict equivalence across the following critical parameters:

• Logic Type: NOR Gate with identical 4-channel, 2-input configuration
• Electrical Specifications: Supply voltage range 4.75V ~ 5.25V, output current ratings 1mA/20mA, input logic levels 0.8V/2V, and operating temperature 0°C ~ 70°C
• Propagation Delay: Maximum 7.5ns @ 5V with 50pF load
• Package Compatibility: 14-DIP (0.300", 7.62mm) through-hole mounting
• Base Product Number: 74S02 series designation

The SN74S02N from Texas Instruments meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74S02N from Texas Instruments is a qualified substitute for the DM74S02N. The Texas Instruments device maintains full electrical and mechanical compatibility while offering the advantage of active product status and ROHS3 compliance. The SN74S02N exhibits superior propagation delay performance (5ns versus 7.5ns), providing additional timing margin in applications where this parameter is critical.

Selection between these parts should be based on availability, supply chain requirements, and compliance certifications applicable to the end application. The REACH Unaffected status is consistent across both manufacturers.

Frequently Asked Questions (FAQ)

Q: Can the SN74S02N directly replace the DM74S02N in existing designs?

A: Yes. Both parts share identical logic configuration (4-channel NOR gate with 2 inputs), electrical specifications (supply voltage, output current, input logic levels, operating temperature), and physical package (14-DIP through-hole). Pin-to-pin compatibility is confirmed.

Q: What is the difference in propagation delay between these parts?

A: The SN74S02N specifies a maximum propagation delay of 5ns at 5V with 50pF load, compared to 7.5ns for the DM74S02N. Both values are within the 74S series specification window. The faster performance of the Texas Instruments device may provide timing advantages in delay-sensitive applications.

Q: Why is the DM74S02N listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The SN74S02N from Texas Instruments remains in active production, ensuring long-term availability for new designs and system support.

Q: Are there compliance differences between these parts?

A: The SN74S02N carries ROHS3 compliance certification, while the DM74S02N does not specify RoHS status. Both parts maintain REACH Unaffected status. Compliance requirements should be verified against specific application and regional regulations.

Q: Is the packaging identical between these substitutes?

A: Yes. Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging with identical pin spacing and mounting requirements. No PCB layout modifications are necessary for substitution.