SN74LS157NSR Equivalent & Substitute Parts

Part Overview

The SN74LS157NSR is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments. This component is classified as an active product and is supplied in a 16-SOIC surface mount package. The SN74LS157NSR is used in digital logic applications requiring multiplexing of multiple input signals to a single output line. Equivalent and substitute parts are identified when component availability is limited or when design requirements necessitate alternative sourcing options that maintain identical electrical and mechanical specifications.

Substiute Parts

SN74LS157NSR

Texas InstrumentsIn Stock: 5142SN74LS157NSR Datasheet

Current PartRFQ

SN74LS158NSR

Texas InstrumentsIn Stock: 3208SN74LS158NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74LS158NSR is identified as a parametric equivalent to the SN74LS157NSR based on the following substitution criteria:

Matching Parameters:

• Identical circuit configuration: 4 x 2:1 multiplexer
• Identical package type: 16-SOIC surface mount
• Identical voltage supply range: 4.75V ~ 5.25V
• Identical operating temperature range: 0°C ~ 70°C
• Identical output current specifications: 400µA (high), 8mA (low)
• Identical series classification: 74LS
• Identical RoHS and compliance status

Substitution is valid when all electrical parameters, mechanical dimensions, and environmental specifications match between the main part and substitute part. The SN74LS158NSR meets all these criteria and is therefore suitable for direct replacement in applications requiring the SN74LS157NSR.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS158NSR is a direct substitute for the SN74LS157NSR. Both components are active products from Texas Instruments with identical electrical specifications, mechanical packaging, and compliance certifications. Selection between these parts is based on availability and supply chain considerations rather than technical differentiation. Both parts are ROHS3 compliant and carry MSL rating 1, indicating no moisture sensitivity restrictions during storage and handling. The identical voltage supply range (4.75V ~ 5.25V) and operating temperature range (0°C ~ 70°C) ensure functional compatibility in all specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS158NSR be used as a direct replacement for the SN74LS157NSR?

A: Yes. The SN74LS158NSR is a parametric equivalent with identical electrical specifications, package dimensions, and compliance ratings. Direct substitution is valid without circuit modification.

Q: Are there any differences in pin configuration between these parts?

A: No differences are specified in the provided parameters. Both components use the 16-SOIC package with identical pin assignments for the 4 x 2:1 multiplexer function.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the SN74LS157NSR and SN74LS158NSR are ROHS3 compliant, carry MSL rating 1, and are REACH unaffected. Both are classified as active products.

Q: What voltage supply range is required for these multiplexer ICs?

A: Both parts operate with a single supply voltage range of 4.75V ~ 5.25V. This specification is identical for both the main part and substitute.

Q: Are there any output current limitations I should consider?

A: Both parts have identical output current specifications: 400µA maximum output high current and 8mA maximum output low current. These ratings apply equally to both the SN74LS157NSR and SN74LS158NSR.

Q: What is the operating temperature range for these components?

A: Both parts operate across the temperature range of 0°C to 70°C. This specification is identical for both components.