74F157ASJX Equivalent & Substitute Parts

Part Overview

The 74F157ASJX 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 part operates with a single supply voltage between 4.5V and 5.5V and is suitable for applications requiring multiplexing functionality in the 0°C to 70°C operating temperature range.

Substiute Parts

74F157ASJX

onsemiIn Stock: 1672474F157ASJX Datasheet

Current PartRFQ

SN74F157ANSR

Texas InstrumentsIn Stock: 2857SN74F157ANSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F157ASJX is determined by strict equivalence across the following critical parameters:

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

The SN74F157ANSR from Texas Instruments meets all these parameters and qualifies as a parametric equivalent. Both parts share identical electrical characteristics, package dimensions, and functional specifications within the defined operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The SN74F157ANSR is the direct substitute for the obsolete 74F157ASJX. Selection of the Texas Instruments part is supported by:

• Identical electrical and functional specifications across all critical parameters
• Active product status ensuring continued availability and supply chain reliability
• RoHS3 compliance certification for the substitute part, meeting modern regulatory requirements
• Equivalent moisture sensitivity level and export classification
• Pin-compatible 16-SOIC package with identical dimensions

For applications currently using the 74F157ASJX, transition to the SN74F157ANSR requires no circuit modifications or design changes.

Frequently Asked Questions (FAQ)

Q: Can the SN74F157ANSR directly replace the 74F157ASJX without circuit modifications?

A: Yes. Both parts are electrically and mechanically equivalent. The SN74F157ANSR operates within identical voltage, current, and temperature specifications and uses the same 16-SOIC package footprint.

Q: What is the primary reason for substitution?

A: The 74F157ASJX is classified as obsolete. The SN74F157ANSR is an active product from Texas Instruments, ensuring long-term availability and supply chain continuity.

Q: Are there packaging differences between these parts?

A: Both parts use the 16-SOIC (0.209", 5.30mm Width) surface mount package. The main difference is the supplier device package designation: 16-SOP for the onsemi part and 16-SO for the Texas Instruments part. These designations refer to the same physical package specification.

Q: What compliance certifications apply to the substitute part?

A: The SN74F157ANSR is RoHS3 compliant and maintains REACH Unaffected status. Both parts carry EAR99 export classification and have unlimited moisture sensitivity level (MSL 1).

Q: Are there inventory considerations for this substitution?

A: The SN74F157ANSR is actively stocked with current availability. The 74F157ASJX, being obsolete, has limited remaining inventory and should not be relied upon for new production.