DM74AS02N NOR Gate IC Equivalent & Substitute Parts

Part Overview

The DM74AS02N is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in a 14-MDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The DM74AS02N operates within the 74AS logic family standard, which defines its electrical characteristics and pin configuration. Identifying compatible substitutes requires matching the core functional parameters: logic type, circuit count, input configuration, electrical specifications, and physical packaging.

Substiute Parts

DM74AS02N

onsemiIn Stock: 1044DM74AS02N Datasheet

Current PartRFQ

SN74AS02N

Texas InstrumentsIn Stock: 3338SN74AS02N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74AS02N is determined by strict equivalence across the following parameters:

• Logic Function: NOR gate with 4 channels and 2 inputs per channel
• Electrical Specifications: Supply voltage 4.5V ~ 5.5V, output current 2mA/20mA, input logic levels 0.8V (low) and 2V (high), propagation delay 4.5ns @ 5V with 50pF load
• Operating Range: Temperature range 0°C ~ 70°C
• Physical Package: 14-DIP form factor with 0.300" (7.62mm) pitch, through-hole mounting
• Base Series: 74AS logic family standard

The SN74AS02N from Texas Instruments meets all these criteria and qualifies as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS02N from Texas Instruments is the direct equivalent for the obsolete DM74AS02N. Both parts share identical electrical specifications, logic function, and physical packaging. The primary distinction is product status: the DM74AS02N is obsolete, while the SN74AS02N remains in active production.

For new designs and production applications, the SN74AS02N is the appropriate selection. The Texas Instruments part offers the advantage of active product status and ROHS3 compliance, whereas the onsemi part carries RoHS non-compliant status. Both parts are classified as REACH Unaffected and carry EAR99 ECCN designation.

Pin-to-pin compatibility is guaranteed between these parts due to identical 14-DIP packaging and base product number (74AS02) within the 74AS logic family standard.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS02N directly replace the DM74AS02N in existing designs?

A: Yes. The SN74AS02N is pin-to-pin compatible with the DM74AS02N. Both parts implement the same 4-channel 2-input NOR gate function with identical electrical specifications, operating temperature range, and 14-DIP package configuration. No circuit modifications are required.

Q: What is the difference between the DM74AS02N and SN74AS02N?

A: The parts are functionally and electrically identical. The primary differences are manufacturer (onsemi vs. Texas Instruments), product status (obsolete vs. active), and compliance certification (RoHS non-compliant vs. ROHS3 compliant). The SN74AS02N is recommended for new applications due to active production status.

Q: Are there packaging differences between these parts?

A: No. Both the DM74AS02N and SN74AS02N use the 14-DIP (0.300", 7.62mm) package with through-hole mounting. PCB footprints and assembly processes are identical.

Q: What are the critical parameters for substitution?

A: Substitution is valid when the following parameters match: logic type (NOR gate), circuit count (4), input count (2), supply voltage range (4.5V ~ 5.5V), output current specifications (2mA/20mA), input logic levels (0.8V low, 2V high), propagation delay (4.5ns @ 5V, 50pF), operating temperature (0°C ~ 70°C), and package type (14-DIP).

Q: Is the SN74AS02N suitable for new production?

A: Yes. The SN74AS02N is in active production status and carries ROHS3 compliance certification, making it suitable for new designs and ongoing manufacturing.