74F157ASJ Equivalent & Substitute Parts

Part Overview

The 74F157ASJ is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74F157 series provides single-supply multiplexing functionality suitable for digital logic applications requiring channel selection and data routing.

Substiute Parts

74F157ASJ

onsemiIn Stock: 397074F157ASJ Datasheet

Current PartRFQ

SN74F157ANSR

Texas InstrumentsIn Stock: 2857SN74F157ANSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F157ASJ is based on strict equivalence of the following parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-SOIC surface mount with 0.209" width (5.30mm)
• Electrical specifications: Single supply voltage 4.5V ~ 5.5V
• Output current ratings: 1mA high, 20mA low
• Operating temperature range: 0°C ~ 70°C
• Base product series: 74F

The SN74F157ANSR from Texas Instruments meets all these substitution criteria and is classified as an active product, providing long-term availability for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74F157ANSR is the direct substitute for the 74F157ASJ. The primary distinction is product status: the original onsemi part is obsolete, while the Texas Instruments equivalent maintains active production status. Both components share identical electrical characteristics, package specifications, and compliance certifications (REACH Unaffected, EAR99 ECCN classification). The Texas Instruments variant includes RoHS3 compliance certification, providing additional regulatory alignment for modern manufacturing environments. Selection of the SN74F157ANSR eliminates obsolescence risk while maintaining full functional and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74F157ANSR directly replace the 74F157ASJ without PCB modifications?

A: Yes. Both parts use identical 16-SOIC packaging with 0.209" width (5.30mm). Pin configuration, electrical specifications, and mounting footprint are equivalent, requiring no PCB layout changes.

Q: Are there differences in packaging format between these parts?

A: The 74F157ASJ is supplied in standard packaging, while the SN74F157ANSR is available in Tape & Reel (TR) format. Both use the same 16-SOIC case. Tape & Reel format is standard for high-volume production and automated assembly.

Q: What is the significance of the product status difference?

A: The 74F157ASJ is classified as obsolete, indicating onsemi has discontinued production. The SN74F157ANSR maintains active status with Texas Instruments, ensuring continued availability and supply chain stability for future production runs.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both components are REACH Unaffected and classified under ECCN EAR99. The SN74F157ANSR additionally carries RoHS3 compliance certification.

Q: Are the electrical performance characteristics identical?

A: Yes. Both parts operate within 4.5V ~ 5.5V supply voltage, support 0°C ~ 70°C operating temperature range, and deliver identical output current specifications of 1mA high and 20mA low.