SN74LS02NS Equivalent & Substitute Parts

Part Overview

The SN74LS02NS is a NOR Gate IC manufactured by Texas Instruments, featuring 4 channels with 2 inputs per channel in a 14-SO surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring NOR gate logic functionality.

Substiute Parts

SN74LS02NS

Texas InstrumentsIn Stock: 2772SN74LS02NS Datasheet

Current PartRFQ

SN74LS02NSR

Texas InstrumentsIn Stock: 4016SN74LS02NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS02NS is determined by strict equivalence across the following critical parameters:

• Logic function: NOR Gate with identical 4-channel, 2-input configuration
• Electrical specifications: Voltage supply range, output current ratings, input logic levels, and propagation delay must match exactly
• Package specification: 14-SOIC surface mount package with identical physical dimensions
• Compliance certifications: RoHS3 compliance and MSL rating must be maintained
• Manufacturer: Texas Instruments as the original equipment manufacturer

The SN74LS02NSR qualifies as a direct substitute based on identical electrical and mechanical parameters across all specified criteria.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS02NSR is the direct substitute for the SN74LS02NS. Both parts maintain identical electrical and mechanical specifications, ensuring functional equivalence in circuit applications. The primary distinction is product status: the SN74LS02NS is Last Time Buy with limited inventory (2,741 pcs), while the SN74LS02NSR is Active with greater availability (3,978 pcs). For new designs or production requiring sustained supply, the SN74LS02NSR is the appropriate selection. Both parts satisfy ROHS3 compliance and MSL Level 1 requirements, supporting applications with standard moisture sensitivity handling.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS02NSR directly replace the SN74LS02NS in existing designs?

A: Yes. The SN74LS02NSR is electrically and mechanically identical to the SN74LS02NS. All electrical parameters, logic function, package dimensions, and compliance certifications are equivalent. Direct substitution is supported without circuit modification.

Q: What is the difference between the SN74LS02NS and SN74LS02NSR?

A: The primary difference is packaging format and product status. The SN74LS02NS is supplied in Tube packaging and is Last Time Buy. The SN74LS02NSR is supplied in Cut Tape (CT) & Digi-Reel® packaging and maintains Active product status. Electrical specifications are identical.

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

A: No. Both the SN74LS02NS and SN74LS02NSR are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. Compliance certifications are identical.

Q: What is the 14-SOIC package specification?

A: The 14-SOIC package is a 14-pin surface mount integrated circuit package with a body width of 0.209 inches (5.30mm). This package type is standard for both the main part and substitute, ensuring PCB footprint compatibility.

Q: Why is the SN74LS02NS classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory is available for purchase, but no future production is planned. The SN74LS02NSR, as the Active equivalent, is recommended for ongoing supply requirements.