DM7402N Equivalent & Substitute Parts

Part Overview

The DM7402N is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by onsemi in a 14-MDIP package. This logic component operates within the 7400 series standard and is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying equivalent and substitute parts is essential for design continuity and procurement flexibility. The substitute parts listed maintain functional and electrical compatibility while offering improved availability and compliance status.

Substiute Parts

DM7402N

onsemiIn Stock: 1273DM7402N Datasheet

Current PartRFQ

SN7402N

Texas InstrumentsIn Stock: 2030SN7402N Datasheet

DirectRFQ

SN74LS02N

Texas InstrumentsIn Stock: 8747SN74LS02N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM7402N is determined by strict equivalence across the following critical parameters:

• Logic function: NOR Gate with identical 4-channel, 2-input configuration
• Electrical specifications: Supply voltage range (4.75V ~ 5.25V), output current ratings (400µA, 16mA), and input logic levels (0.8V low, 2V high)
• Propagation delay performance: Maximum 22ns at 5V with 15pF load
• Operating temperature range: 0°C ~ 70°C
• Physical package: 14-DIP form factor with 0.300" (7.62mm) pitch, compatible with through-hole mounting

The SN7402N (Texas Instruments) qualifies as a direct equivalent, meeting all electrical and mechanical parameters identically. The SN74LS02N represents a similar substitute within the 74LS logic family, maintaining functional compatibility with improved propagation delay performance (15ns versus 22ns).

Parameter Comparison

Engineering Selection Recommendations

The SN7402N (Texas Instruments) is the primary substitute for the DM7402N. Both parts maintain identical electrical and mechanical specifications, with the SN7402N offering the advantage of active product status and ROHS3 compliance, addressing the obsolescence and regulatory concerns associated with the original component.

The SN74LS02N provides an alternative within the 74LS logic family. While functionally equivalent, it delivers superior propagation delay performance (15ns versus 22ns), making it suitable for applications requiring faster switching characteristics. The SN74LS02N is also actively manufactured and ROHS3 compliant.

Selection between SN7402N and SN74LS02N depends on timing requirements. For designs where the original 22ns propagation delay is specified, the SN7402N maintains exact performance parity. For applications tolerant of faster switching or benefiting from improved speed margins, the SN74LS02N is appropriate.

Frequently Asked Questions (FAQ)

Q: Can the SN7402N directly replace the DM7402N without circuit modification?

A: Yes. The SN7402N is electrically and mechanically identical to the DM7402N across all specified parameters, including supply voltage, output current, input logic levels, propagation delay, and operating temperature range. The 14-DIP package footprint is identical, enabling direct socket substitution.

Q: What is the difference between the SN7402N and SN74LS02N?

A: Both are NOR Gate ICs with identical logic configuration and package. The primary difference is propagation delay: the SN74LS02N operates at 15ns versus 22ns for the SN7402N. This faster performance is inherent to the 74LS logic family. All other electrical parameters remain equivalent.

Q: Are there any compliance or regulatory differences between these parts?

A: The DM7402N is RoHS non-compliant. Both the SN7402N and SN74LS02N are ROHS3 compliant. For applications subject to RoHS regulations, either Texas Instruments substitute is required.

Q: Is the 14-DIP package compatible with modern PCB designs?

A: Yes. The 14-DIP package with 0.300" (7.62mm) pitch is a standard through-hole format compatible with conventional PCB layouts. All three parts use this identical package specification.

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

A: For new designs, the SN7402N is recommended as the primary choice, offering exact electrical equivalence to the original specification. The SN74LS02N is appropriate if faster propagation delay provides design benefits or if inventory availability favors the 74LS variant.