SN74ALS32NS Equivalent & Substitute Parts

Part Overview

The SN74ALS32NS is a 4-channel 2-input OR gate logic integrated circuit manufactured by Texas Instruments in 14-SO surface mount packaging. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The SN74ALS32NS operates within the 74ALS logic family and is designed for digital logic applications requiring OR gate functionality. Due to its Last Time Buy status, identifying compatible substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

SN74ALS32NS

Texas InstrumentsIn Stock: 18485SN74ALS32NS Datasheet

Current PartRFQ

SN74ALS32NSR

Texas InstrumentsIn Stock: 4321SN74ALS32NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS32NS is determined by strict equivalence across the following critical parameters:

• Logic function: 4-channel 2-input OR gate
• Supply voltage range: 4.5V ~ 5.5V
• Output current specifications: 400µA (high), 8mA (low)
• Propagation delay: 14ns @ 5V, 50pF
• Package type: 14-SOIC surface mount
• Operating temperature range: 0°C ~ 70°C
• Compliance certifications: ROHS3, MSL Level 1

The SN74ALS32NSR qualifies as a direct substitute based on identical electrical performance, package footprint, and compliance requirements. The primary distinction is packaging format: the SN74ALS32NS is supplied in Tube packaging, while the SN74ALS32NSR is supplied in Tape & Reel (TR) format. Both components share the same base product number (74ALS32) and maintain full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS32NSR is the recommended substitute for the SN74ALS32NS based on the following engineering criteria:

Product Status & Supply Continuity: The SN74ALS32NS carries Last Time Buy status, indicating end-of-life production. The SN74ALS32NSR maintains Active product status, ensuring ongoing availability and supply chain stability for new designs and production requirements.

Electrical & Functional Equivalence: Both components are manufactured by Texas Instruments and share identical electrical specifications, including supply voltage range, output current ratings, propagation delay characteristics, and operating temperature range. The 14-SOIC package footprint is identical, enabling direct PCB layout compatibility without redesign.

Compliance & Certification: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for industrial and commercial applications. Moisture Sensitivity Level 1 (Unlimited) classification applies to both components.

Packaging Consideration: The primary difference is packaging format. The SN74ALS32NSR is supplied in Tape & Reel format, which is standard for automated assembly processes. Organizations using manual assembly or requiring tube packaging should confirm packaging availability with their supplier before design finalization.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS32NSR be used as a direct replacement for the SN74ALS32NS in existing designs?

A: Yes. The SN74ALS32NSR is electrically and functionally equivalent to the SN74ALS32NS. Both components share identical pin configurations, electrical specifications, and 14-SOIC package dimensions. No circuit modifications or PCB redesign is required for substitution.

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

A: Tube packaging supplies components in plastic tubes suitable for manual handling and small-quantity assembly. Tape & Reel packaging supplies components on continuous carrier tape wound on reels, optimized for automated pick-and-place assembly equipment. Both formats contain the same component with identical electrical performance.

Q: Are there any electrical parameter differences between these parts?

A: No. The SN74ALS32NS and SN74ALS32NSR maintain identical electrical specifications across all critical parameters: supply voltage (4.5V ~ 5.5V), output current (400µA high, 8mA low), propagation delay (14ns @ 5V, 50pF), and operating temperature range (0°C ~ 70°C).

Q: Why is the SN74ALS32NS marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this component in Tube packaging format. The SN74ALS32NSR in Tape & Reel format remains in active production, providing a path for continued supply and design continuity.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74ALS32NS and SN74ALS32NSR are ROHS3 compliant and REACH Unaffected, meeting environmental and regulatory requirements for industrial applications.

Q: What is the pin count and package footprint?

A: Both components are 14-pin integrated circuits in 14-SOIC (Small Outline Integrated Circuit) packaging with a width of 0.209 inches (5.30mm). Pin configurations are identical, ensuring direct compatibility on PCBs designed for either part number.