SN74S32D Equivalent & Substitute Parts

Part Overview

The SN74S32D 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 remaining inventory. The SN74S32D operates within the 74S logic family and is designed for applications requiring OR gate functionality in digital logic circuits. Identifying equivalent substitute parts is necessary due to the Last Time Buy status and to ensure long-term design continuity and supply chain reliability.

Substiute Parts

SN74S32D

Texas InstrumentsIn Stock: 1367SN74S32D Datasheet

Current PartRFQ

SN74S32DR

Texas InstrumentsIn Stock: 2257SN74S32DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74S32D is determined by strict equivalence across the following critical parameters:

• Logic Type: OR Gate (4-channel, 2-input configuration)
• Electrical Specifications: Supply voltage range 4.75V ~ 5.25V, propagation delay 5ns @ 5V with 50pF load, input logic levels (Low: 0.8V, High: 2V), output current ratings (1mA high, 20mA low)
• Package: 14-SOIC surface mount form factor with identical physical dimensions (0.154", 3.90mm width)
• Series Compatibility: 74S logic family
• Compliance: ROHS3 compliant, MSL Level 1

The SN74S32DR qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is packaging format: SN74S32D is supplied in Tube packaging, while SN74S32DR is supplied in Tape & Reel (TR) format. Both components share the same base product number (74S32) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The SN74S32DR is the manufacturer-recommended substitute for the SN74S32D. Both components are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN74S32D is designated Last Time Buy, while the SN74S32DR maintains Active product status with higher available inventory (2200 pcs vs. 1262 pcs). Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The functional difference is limited to packaging format: Tube versus Tape & Reel. Selection between these formats depends on assembly process requirements and handling procedures rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the SN74S32DR directly replace the SN74S32D in existing designs?

A: Yes. The SN74S32DR is electrically and mechanically identical to the SN74S32D. Both components feature the same 14-SOIC package dimensions, pinout, electrical specifications, and operating characteristics. Substitution is valid at the component level.

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

A: Tube packaging supplies individual components in a plastic tube for manual handling and small-quantity applications. Tape & Reel packaging supplies components on continuous carrier tape wound on a reel, optimized for automated pick-and-place assembly equipment. The electrical and mechanical properties of the component itself are identical.

Q: Why is the SN74S32D 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 a limited time. The SN74S32DR, with Active status, represents the current production equivalent and is recommended for new designs and long-term supply continuity.

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

A: No. Both the SN74S32D and SN74S32DR are ROHS3 compliant, REACH unaffected, and carry identical MSL Level 1 ratings. Regulatory and environmental compliance is equivalent.

Q: What are the critical parameters for OR gate substitution in the 74S family?

A: Critical parameters include logic type (4-channel 2-input OR gate), supply voltage range (4.75V ~ 5.25V), propagation delay (5ns @ 5V, 50pF), input logic levels (Low: 0.8V, High: 2V), output current ratings (1mA high, 20mA low), and 14-SOIC package form factor. All these parameters must match for functional equivalence.