74F151ASC Equivalent & Substitute Parts

Part Overview

The 74F151ASC is a 1 x 8:1 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 74F151 series provides single-supply multiplexing functionality suitable for digital logic applications requiring data selection from eight input lines.

Substiute Parts

74F151ASC

onsemiIn Stock: 229774F151ASC Datasheet

Current PartRFQ

SN74F151BD

Texas InstrumentsIn Stock: 950SN74F151BD Datasheet

DirectRFQ

SN74F151BDR

Texas InstrumentsIn Stock: 5441SN74F151BDR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74F151ASC is determined by strict equivalence across the following parameters:

• Circuit configuration: 1 x 8:1 multiplexer topology
• Package type: 16-SOIC surface mount form factor
• Voltage supply range: 4.5V ~ 5.5V single supply
• Operating temperature range: 0°C ~ 70°C
• Output current specifications: 1mA high, 20mA low (or higher)
• Independent circuits: 1

The substitute parts SN74F151BD and SN74F151BDR, both manufactured by Texas Instruments, meet all functional and electrical requirements for direct substitution. Both maintain identical circuit topology, package geometry, and voltage/temperature specifications. The primary differences are product status and packaging format (tube versus tape & reel).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the 74F151ASC, the SN74F151BDR is the preferred substitute. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The SN74F151BDR is supplied in tape & reel packaging, standard for automated assembly processes.

The SN74F151BD represents an alternative substitute with identical electrical specifications but carries Last Time Buy status, indicating limited future availability. This part is supplied in tube packaging.

Both Texas Instruments substitutes provide ROHS3 compliance and exceed the original output low current specification (24mA versus 20mA), ensuring compatibility with existing circuit designs. All three parts share identical package geometry, voltage supply requirements, and operating temperature ranges, enabling direct pin-for-pin substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can SN74F151BD and SN74F151BDR be used interchangeably with 74F151ASC?

A: Yes. Both Texas Instruments parts are electrically and mechanically equivalent to the 74F151ASC. They share identical 16-SOIC package dimensions, voltage supply specifications (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and multiplexer circuit topology (1 x 8:1). The output low current specification is higher on the TI parts (24mA versus 20mA), which is compatible with existing designs.

Q: What is the difference between SN74F151BD and SN74F151BDR?

A: Both parts are functionally identical with matching electrical specifications. The primary difference is packaging format: SN74F151BD is supplied in tube packaging, while SN74F151BDR is supplied in tape & reel format. Additionally, SN74F151BDR maintains active product status, whereas SN74F151BD is Last Time Buy.

Q: Why is the 74F151ASC obsolete?

A: The 74F151ASC is classified as obsolete by onsemi. Texas Instruments continues to manufacture equivalent 74F151 variants, making substitution straightforward for ongoing production and design requirements.

Q: Are there any compliance differences between these parts?

A: The Texas Instruments substitutes (SN74F151BD and SN74F151BDR) are ROHS3 compliant. All three parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

Q: Can these parts be used in new designs?

A: Yes. The SN74F151BDR is recommended for new designs due to its active product status. The SN74F151BD may be used but carries Last Time Buy status, limiting long-term availability.