74F151ASJX Equivalent & Substitute Parts

Part Overview

The 74F151ASJX 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

74F151ASJX

onsemiIn Stock: 177374F151ASJX Datasheet

Current PartRFQ

SN74F151BNSR

Texas InstrumentsIn Stock: 3768SN74F151BNSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F151ASJX is determined by the following critical parameters:

• Circuit Configuration: Must maintain 1 x 8:1 multiplexer topology
• Package Compatibility: 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
• Base Product Series: 74F151 logic family

The SN74F151BNSR from Texas Instruments satisfies all substitution criteria. Both parts share identical circuit configuration, package dimensions, voltage supply specifications, and operating temperature range. The substitute maintains functional and electrical compatibility while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74F151BNSR is the direct substitute for the 74F151ASJX. Selection is based on the following factors:

• Product Status: The 74F151ASJX is obsolete; the SN74F151BNSR maintains active status, ensuring long-term availability and supply chain continuity.
• Functional Equivalence: Both parts implement identical 1 x 8:1 multiplexer logic with matching pin configurations and electrical specifications.
• Compliance: The SN74F151BNSR is ROHS3 compliant, meeting current regulatory requirements. Both parts maintain REACH Unaffected status.
• Package Compatibility: Identical 16-SOIC package dimensions enable direct PCB layout compatibility without redesign.
• Electrical Performance: Output low current specification of the substitute (24mA) exceeds the original part (20mA), providing improved drive capability within the same voltage and temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can the SN74F151BNSR replace the 74F151ASJX in existing designs?

A: Yes. Both parts share identical circuit configuration, package dimensions, voltage supply range, and operating temperature specifications. Direct substitution is possible without circuit modification.

Q: Are there any differences in electrical performance between these parts?

A: The output low current specification differs slightly. The SN74F151BNSR provides 24mA compared to 20mA for the 74F151ASJX. This represents improved drive capability and does not create compatibility issues in standard logic applications.

Q: What is the significance of the package designation 16-SOIC (0.209", 5.30mm Width)?

A: This specifies a 16-pin small-outline integrated circuit with 0.209 inches (5.30mm) body width. Both the original and substitute parts use this identical package, ensuring PCB footprint compatibility and eliminating the need for layout redesign.

Q: Why is the 74F151ASJX listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SN74F151BNSR from Texas Instruments provides equivalent functionality with active production status, making it the recommended choice for new designs and ongoing production.

Q: Are compliance certifications equivalent between the two parts?

A: Both parts maintain REACH Unaffected status. The SN74F151BNSR additionally carries ROHS3 compliance certification, meeting current environmental and regulatory standards.