SN74ALS32D Equivalent & Substitute Parts

Part Overview

The SN74ALS32D is a 4-channel 2-input OR 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 availability. The SN74ALS32D operates within the 74ALS logic family and provides standard OR gate functionality for digital logic applications. Identifying equivalent substitute parts is necessary due to the Last Time Buy status and finite inventory levels, ensuring design continuity and long-term supply chain reliability.

Substiute Parts

SN74ALS32D

Texas InstrumentsIn Stock: 1082SN74ALS32D Datasheet

Current PartRFQ

SN74ALS32DR

Texas InstrumentsIn Stock: 3853SN74ALS32DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS32D is determined by strict equivalence across the following critical parameters:

• Logic Type: OR Gate (4-channel, 2-input configuration)
• Electrical Specifications: Supply voltage 4.5V ~ 5.5V, output current 400µA/8mA, input logic levels 0.8V/2V, propagation delay 14ns @ 5V/50pF
• Operating Temperature Range: 0°C ~ 70°C
• Package: 14-SOIC surface mount form factor
• Compliance: ROHS3 Compliant, MSL Level 1

The SN74ALS32DR qualifies as a direct substitute based on identical electrical characteristics, logic configuration, and package specifications. The primary distinction is packaging format: SN74ALS32D is supplied in Tube packaging, while SN74ALS32DR is supplied in Tape & Reel (TR) format. Both maintain the same 14-SOIC physical footprint and electrical performance parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS32DR is the manufacturer-recommended substitute for the SN74ALS32D. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications, logic functionality, and physical package dimensions. The SN74ALS32DR carries Active product status with higher inventory availability (3793 Pcs), compared to the Last Time Buy status of the SN74ALS32D (1064 Pcs).

Both parts satisfy ROHS3 compliance and REACH unaffected requirements. The SN74ALS32DR is supplied in Tape & Reel format, which is standard for automated assembly processes, whereas the SN74ALS32D is supplied in Tube format. This packaging difference does not affect electrical performance or PCB-level compatibility when using appropriate handling equipment for each format.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS32DR be used as a direct replacement for SN74ALS32D in existing designs?

A: Yes. The SN74ALS32DR is electrically and functionally identical to the SN74ALS32D. Both parts share the same 14-SOIC package footprint, supply voltage range, logic levels, propagation delay, and operating temperature specifications. The only difference is the packaging format (Tape & Reel vs. Tube).

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 applications. Tape & Reel packaging supplies components on continuous tape wound on reels, optimized for automated pick-and-place assembly equipment. Both formats contain the same component with identical electrical characteristics.

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

A: No. Both SN74ALS32D and SN74ALS32DR are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity rating. Compliance certifications are identical.

Q: Why is the SN74ALS32D marked 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 runs are planned. The SN74ALS32DR, with Active status, represents the ongoing production equivalent.

Q: Will substituting SN74ALS32DR require PCB layout changes?

A: No. Both parts use the identical 14-SOIC (0.154", 3.90mm Width) package. PCB footprints, pin assignments, and land patterns are identical. No layout modifications are necessary.