SN74HC258D Equivalent & Substitute Parts

Part Overview

The SN74HC258D is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. The SN74HC258D operates across a 2V to 6V supply range with output currents of 7.8mA for both high and low states, making it suitable for general-purpose logic multiplexing applications in digital systems.

Due to Last Time Buy status, identifying functionally equivalent alternatives ensures design continuity and supply chain reliability for new production runs and long-term component sourcing.

Substiute Parts

SN74HC258D

Texas InstrumentsIn Stock: 2935SN74HC258D Datasheet

Current PartRFQ

SN74HC258DR

Texas InstrumentsIn Stock: 3194SN74HC258DR Datasheet

MFR RecommendedRFQ

SN74HC158D

Texas InstrumentsIn Stock: 1636SN74HC158D Datasheet

Parametric EquivalentRFQ

SN74HC257D

Texas InstrumentsIn Stock: 150490SN74HC257D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC258D are qualified based on strict electrical and mechanical parameter matching within the 74HC logic family. The substitution criteria are:

Primary Substitution Parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-SOIC surface mount
• Voltage supply range: 2V ~ 6V
• Output current specifications: 7.8mA high and low
• Operating temperature range: -40°C ~ 85°C
• RoHS3 compliance and MSL Level 1 rating

Substitute Categories:

MFR Recommended Substitute: SN74HC258DR differs only in packaging format (Tape & Reel vs. Tube) while maintaining identical electrical specifications and Active product status.

Parametric Equivalents: SN74HC158D and SN74HC257D share all critical electrical parameters and package dimensions. These parts are functionally interchangeable at the circuit level, with differences limited to product lifecycle status and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

SN74HC258DR (MFR Recommended): This is the primary substitute for new designs and ongoing production. It maintains identical electrical and mechanical specifications to the SN74HC258D while offering Active product status, ensuring long-term availability and supply chain stability. The only difference is packaging format (Tape & Reel), which is advantageous for automated assembly processes.

SN74HC158D (Parametric Equivalent): This part provides full electrical and mechanical compatibility with the SN74HC258D. However, it carries Last Time Buy status, limiting its suitability for long-term production commitments. Use only when SN74HC258DR availability is constrained.

SN74HC257D (Parametric Equivalent): This part is electrically and mechanically equivalent but is Discontinued at DiGi Electronics. Inventory availability is high (150,400 pcs), but future sourcing cannot be guaranteed. Selection should be limited to applications with fixed production windows or where existing stock is available through alternative distributors.

For new designs requiring sustained component supply, SN74HC258DR is the recommended choice due to Active status and full parameter equivalence.

Frequently Asked Questions (FAQ)

Q: Can SN74HC258DR be used as a direct replacement for SN74HC258D?

A: Yes. SN74HC258DR is electrically and mechanically identical to SN74HC258D. The only difference is packaging format: SN74HC258D is supplied in Tube packaging, while SN74HC258DR is supplied in Tape & Reel format. Both are suitable for PCB assembly; Tape & Reel is preferred for automated pick-and-place operations.

Q: What is the difference between SN74HC258D and SN74HC158D?

A: Both parts are parametric equivalents with identical electrical specifications and 16-SOIC package dimensions. The difference is product lifecycle status: SN74HC258D is Last Time Buy, while SN74HC158D is also Last Time Buy. Both offer equivalent circuit performance and are interchangeable at the board level.

Q: Is SN74HC257D suitable for production use?

A: SN74HC257D is electrically and mechanically equivalent to SN74HC258D and is suitable for applications with defined production timelines. However, it is Discontinued at DiGi Electronics, meaning future availability through standard distribution channels is not guaranteed. Use only when existing inventory is confirmed available or for non-critical applications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All listed substitutes (SN74HC258DR, SN74HC158D, SN74HC257D) are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. They are electrically and mechanically qualified for equivalent applications.

Q: Which substitute should I specify for a new design?

A: Specify SN74HC258DR for new designs. It offers Active product status, ensuring sustained availability and supply chain reliability. It is the manufacturer-recommended substitute and is functionally identical to the SN74HC258D.