SN74LS158D Equivalent & Substitute Parts

Part Overview

The SN74LS158D is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This device functions as a data selector, routing one of two input signals to a single output based on control logic. The main part is currently in Last Time Buy status, indicating discontinued production with limited remaining inventory. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this multiplexer functionality.

Substiute Parts

SN74LS158D

Texas InstrumentsIn Stock: 2164SN74LS158D Datasheet

Current PartRFQ

SN74LS158DR

Texas InstrumentsIn Stock: 3320SN74LS158DR Datasheet

MFR RecommendedRFQ

SN74LS157D

onsemiIn Stock: 5676SN74LS157D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS158D are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

• Circuit configuration (4 x 2:1 multiplexer topology)
• Output current specifications (400µA high, 8mA low)
• Supply voltage range (4.75V ~ 5.25V)
• Operating temperature range (0°C ~ 70°C)
• Package type (16-SOIC surface mount)
• Series classification (74LS logic family)

Parts meeting all these parameters are considered parametric equivalents. Packaging format differences (Tube versus Tape & Reel) do not affect electrical compatibility but may impact procurement and handling requirements.

Parameter Comparison

Engineering Selection Recommendations

SN74LS158DR is the primary recommended substitute. This part is manufactured by Texas Instruments, maintains identical electrical specifications, and carries Active product status with higher inventory availability. It meets ROHS3 compliance requirements. The only difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance or pin compatibility.

SN74LS157D meets all electrical and mechanical parameters but carries Obsolete product status and is RoHS non-compliant. This part should be selected only when SN74LS158DR is unavailable and RoHS compliance is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can SN74LS158DR be used as a direct replacement for SN74LS158D? A: Yes. Both parts share identical electrical specifications, pin configuration, and 16-SOIC package dimensions. The difference in packaging format (Tape & Reel versus Tube) does not affect electrical compatibility or circuit performance.

Q: What is the difference between Tube and Tape & Reel packaging? A: Tube packaging supplies components in plastic tubes for manual handling and smaller quantities. Tape & Reel packaging supplies components on continuous tape for automated assembly equipment. Both formats contain the same component with identical specifications.

Q: Is SN74LS157D compatible with designs using SN74LS158D? A: SN74LS157D meets all electrical and mechanical parameters required for substitution. However, it carries Obsolete status and does not meet RoHS compliance. Use this part only when SN74LS158DR is unavailable and RoHS requirements do not apply to your application.

Q: What are the critical parameters for multiplexer substitution? A: Circuit configuration (4 x 2:1), output current ratings (400µA high, 8mA low), supply voltage range (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), and package type (16-SOIC) must match exactly for functional equivalence.

Q: Does packaging format affect circuit performance? A: No. Tube and Tape & Reel formats contain identical components with the same electrical characteristics and pin assignments. Format selection depends on assembly process requirements and procurement volume.