SN74AS02D NOR Gate IC Equivalent & Substitute Parts

Part Overview

The SN74AS02D is a 4-channel 2-input NOR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. The SN74AS02D remains functional and compliant with current standards, but sourcing alternatives is necessary due to inventory constraints and product lifecycle status. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability through active product lines.

Substiute Parts

SN74AS02D

Texas InstrumentsIn Stock: 2326SN74AS02D Datasheet

Current PartRFQ

SN74AS02DR

Texas InstrumentsIn Stock: 6973SN74AS02DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AS02D is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part SN74AS02DR maintains identical specifications in logic function, circuit count, input configuration, voltage supply range, output current ratings, input logic thresholds, propagation delay characteristics, operating temperature range, and physical package dimensions. The primary distinction is packaging format: the main part uses Tube packaging while the substitute uses Tape & Reel (TR) format. Both parts are manufactured by Texas Instruments within the 74AS series and share the same base product number (74AS02). Substitution is valid when packaging format compatibility with assembly processes is confirmed.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS02DR is the direct substitute for the SN74AS02D based on complete electrical and functional equivalence. Selection between these parts depends on assembly and procurement requirements:

SN74AS02D (Tube Packaging): Use when manual component handling or small-volume assembly processes are employed. Inventory status is Last Time Buy, indicating limited availability for future orders.

SN74AS02DR (Tape & Reel Packaging): Use for automated pick-and-place assembly operations. Product status is Active, ensuring continued availability and supply chain reliability. Both parts carry identical ROHS3 compliance, MSL rating, and regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

Frequently Asked Questions (FAQ)

Q: Can SN74AS02DR be used as a direct replacement for SN74AS02D in existing designs?

A: Yes. All electrical parameters, logic function, timing characteristics, voltage specifications, and physical package dimensions are identical. The only difference is packaging format (Tape & Reel versus Tube). Substitution is valid provided the assembly process accommodates the packaging format.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for manual handling and small-volume assembly. Tape & Reel packaging is formatted for automated pick-and-place equipment in high-volume manufacturing. Both contain the same component with identical specifications.

Q: Why is SN74AS02D marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory is available for purchase, but no future production runs are planned. The SN74AS02DR (Active status) is the recommended long-term alternative.

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

A: No. Both parts are ROHS3 compliant, carry MSL rating 1 (Unlimited), and share identical REACH and ECCN classifications. Regulatory and environmental compliance is equivalent.

Q: What are the critical parameters for NOR gate substitution?

A: Logic type (NOR Gate), circuit count (4 channels), input configuration (2 inputs per gate), supply voltage range (4.5V ~ 5.5V), output current ratings (2mA high, 20mA low), input logic thresholds (0.8V low, 2V high), propagation delay (4.5ns @ 5V, 50pF), operating temperature range (0°C ~ 70°C), and package type (14-SOIC) must all match exactly for valid substitution.