74F151ASJ Equivalent & Substitute Parts

Part Overview

The 74F151ASJ is a 1 x 8:1 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 74F151 series provides single-supply multiplexing functionality suitable for digital logic applications requiring data selection from eight input lines.

Substiute Parts

74F151ASJ

onsemiIn Stock: 334574F151ASJ Datasheet

Current PartRFQ

SN74F151BNSR

Texas InstrumentsIn Stock: 3768SN74F151BNSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F151ASJ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Circuit Configuration: 1 x 8:1 multiplexer topology
• Package / Case: 16-SOIC (0.209", 5.30mm Width) surface mount package
• Voltage Supply Range: 4.5V ~ 5.5V single supply operation
• Operating Temperature Range: 0°C ~ 70°C
• Series Classification: 74F logic family
• Mounting Type: Surface Mount

The SN74F151BNSR from Texas Instruments meets all these substitution criteria, maintaining identical package geometry, electrical supply requirements, and temperature operating range. Both parts belong to the 74F multiplexer series and share the same base product number (74F151), ensuring pin-compatible operation in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The SN74F151BNSR from Texas Instruments is the qualified substitute for the obsolete 74F151ASJ. The primary advantage of this substitution is the active product status of the Texas Instruments part, ensuring long-term availability and supply chain continuity. Both parts maintain identical electrical specifications within the 74F logic family, including voltage supply range (4.5V ~ 5.5V) and operating temperature range (0°C ~ 70°C).

The output low current specification of the SN74F151BNSR (24mA) exceeds that of the 74F151ASJ (20mA), providing improved current sourcing capability without compromising compatibility. Both parts carry identical REACH and ECCN classifications, confirming regulatory equivalence. The SN74F151BNSR is available in Tape & Reel packaging, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Are the 74F151ASJ and SN74F151BNSR pin-compatible?

A: Yes. Both parts use the 16-SOIC package with identical pin assignments and electrical characteristics within the 74F multiplexer series. Direct substitution is possible without circuit modification.

Q: What is the difference in output current specifications?

A: The SN74F151BNSR provides 24mA output low current compared to 20mA for the 74F151ASJ. This represents an improvement in current sourcing capability and does not affect compatibility in standard logic applications.

Q: Why is the 74F151ASJ listed as obsolete?

A: The 74F151ASJ has reached end-of-life status with onsemi. The SN74F151BNSR from Texas Instruments remains in active production, providing a viable path for continued component sourcing.

Q: Are there packaging differences between these parts?

A: Both parts use the 16-SOIC (0.209", 5.30mm Width) surface mount package. The primary packaging difference is that the SN74F151BNSR is supplied in Tape & Reel format, while the 74F151ASJ was supplied in standard packaging. This does not affect electrical or mechanical compatibility.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 74F151ASJ and SN74F151BNSR carry identical REACH Unaffected and EAR99 ECCN classifications, confirming regulatory equivalence for export and compliance purposes.