74F157ASCX Equivalent & Substitute Parts

Part Overview

The 74F157ASCX is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOIC 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 with standardized electrical characteristics suitable for digital logic applications requiring channel selection and data routing.

Substiute Parts

74F157ASCX

onsemiIn Stock: 960674F157ASCX Datasheet

Current PartRFQ

SN74F157AD

Texas InstrumentsIn Stock: 3162SN74F157AD Datasheet

DirectRFQ

SN74F157ADR

Texas InstrumentsIn Stock: 2277SN74F157ADR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74F157ASCX is determined by strict equivalence across the following parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Independent circuits: 1
• Output current specifications: 1mA high, 20mA low
• Supply voltage range: 4.5V ~ 5.5V single supply
• Operating temperature: 0°C ~ 70°C
• Package: 16-SOIC surface mount
• Moisture sensitivity: MSL 1

The substitute parts SN74F157AD and SN74F157ADR, both manufactured by Texas Instruments, meet all these electrical and mechanical parameters. Substitution is valid based on parametric equivalence within the 74F series base product number classification.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production applications, SN74F157ADR is the preferred substitute. This part carries Active product status from Texas Instruments, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and maintains full parametric equivalence with the obsolete 74F157ASCX.

SN74F157AD is available as a secondary option with Last Time Buy status, suitable for applications requiring immediate substitution where supply from active inventory is necessary. Both Texas Instruments parts are REACH compliant and carry identical electrical specifications and package configurations.

The onsemi 74F157ASCX should not be selected for new designs due to its obsolete classification. Existing designs using this part number should transition to SN74F157ADR to ensure continued component availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SN74F157AD and SN74F157ADR be used interchangeably with 74F157ASCX?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications. The difference between them is packaging format: SN74F157AD is supplied in Tube packaging, while SN74F157ADR is supplied in Tape & Reel format. Selection depends on assembly process requirements.

Q: What is the difference between the Texas Instruments substitutes?

A: SN74F157AD and SN74F157ADR are identical in electrical performance and package type (16-SOIC). The distinction is packaging and delivery format. SN74F157ADR in Tape & Reel is standard for automated assembly lines, while SN74F157AD in Tube format is suitable for manual assembly or lower-volume applications.

Q: Why is the onsemi 74F157ASCX classified as obsolete?

A: The part has reached end-of-life status with onsemi. Existing inventory may be available, but no new production is planned. Designs should migrate to active alternatives to ensure long-term supply security.

Q: Are there any compliance differences between the parts?

A: All three parts are REACH Unaffected and carry MSL 1 rating. The Texas Instruments parts include explicit ROHS3 compliance certification. For applications requiring RoHS compliance documentation, SN74F157AD or SN74F157ADR are recommended.

Q: Can these parts be used in designs requiring higher operating temperatures?

A: No. All parts in this comparison are rated for 0°C ~ 70°C operation. Applications requiring extended temperature ranges require alternative component selection outside this product family.