SN74LS02DRE4 Equivalent & Substitute Parts

Part Overview

The SN74LS02DRE4 is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The SN74LS02 series remains widely available through alternative packaging and inventory channels, ensuring design continuity for legacy and new implementations.

Substiute Parts

SN74LS02DRE4

Texas InstrumentsIn Stock: 769SN74LS02DRE4 Datasheet

Current PartRFQ

SN74LS02DR

Texas InstrumentsIn Stock: 35274SN74LS02DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS02DRE4 is determined by strict equivalence across the following parameters:

• Logic function: NOR Gate with identical 4-channel, 2-input configuration
• Electrical specifications: Supply voltage range, output current ratings, input logic levels, and propagation delay
• Package type: 14-SOIC surface mount form factor with matching physical dimensions
• Compliance certifications: ROHS3 compliance and MSL rating

The SN74LS02DR qualifies as a parametric equivalent substitute based on identical electrical and functional specifications. The primary distinction is packaging format: the SN74LS02DR is supplied in Tape & Reel (TR) format, whereas the SN74LS02DRE4 uses standard packaging. Both parts share the same base product number (74LS02) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS02DR is the direct parametric equivalent for the discontinued SN74LS02DRE4. Both parts maintain identical electrical performance, logic function, and package specifications. The SN74LS02DR carries Active product status with significantly higher inventory availability (35,190 pcs vs. 731 pcs), ensuring supply chain continuity. Both parts meet ROHS3 compliance requirements and carry MSL Level 1 ratings, confirming suitability for standard manufacturing and storage conditions without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS02DR directly replace the SN74LS02DRE4 in existing designs?

A: Yes. Both parts are electrically and functionally identical with matching 14-SOIC package dimensions. The primary difference is packaging format: SN74LS02DR is supplied in Tape & Reel format, while SN74LS02DRE4 uses standard packaging. This distinction affects procurement and handling but does not impact circuit performance or PCB assembly compatibility.

Q: What determines substitutability for the SN74LS02DRE4?

A: Substitution is based on matching logic type (NOR Gate), circuit count (4 channels), input configuration (2 inputs per channel), supply voltage range (4.75V ~ 5.25V), output current specifications (400µA, 16mA), input logic levels (0.8V low, 2V high), propagation delay (15ns @ 5V, 15pF), operating temperature range (0°C ~ 70°C), and 14-SOIC package form factor.

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

A: No. Both the SN74LS02DRE4 and SN74LS02DR are ROHS3 compliant with MSL Level 1 ratings. Compliance certifications are identical, confirming equivalent suitability for regulated manufacturing environments.

Q: Why is the SN74LS02DRE4 discontinued while the SN74LS02DR remains active?

A: Product discontinuation at specific distributors does not indicate end-of-life status. The SN74LS02DR remains in active production by Texas Instruments with higher inventory levels, making it the preferred source for ongoing component procurement.

Q: Does packaging format affect circuit performance?

A: No. Tape & Reel (TR) packaging is a supply format that does not alter electrical characteristics, logic function, or performance specifications. The physical component and its behavior remain identical to standard packaging formats.