74HC151DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC151DB,112 is a 1 x 8:1 multiplexer logic IC manufactured by Nexperia USA Inc. in a 16-SSOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74HC151 series provides single-supply operation across a 2V to 6V range, suitable for digital logic applications requiring data selection from multiple input sources.

Substiute Parts

74HC151DB,112

Nexperia USA Inc.In Stock: 83874HC151DB,112 Datasheet

Current PartRFQ

SN74HC151PW

Texas InstrumentsIn Stock: 1219SN74HC151PW Datasheet

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SN74HC151PWR

Texas InstrumentsIn Stock: 4140SN74HC151PWR Datasheet

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SN74HC151PWT

Texas InstrumentsIn Stock: 1182SN74HC151PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC151DB,112 is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the 1 x 8:1 multiplexer circuit configuration and 74HC series logic family designation, ensuring pin-compatible operation.

Electrical Compatibility: All substitutes operate within the 2V to 6V single-supply voltage range. Output current specifications vary between the main part (5.2mA) and Texas Instruments substitutes (7.8mA), with higher output current providing enhanced drive capability.

Operating Temperature: The main part supports -40°C to 125°C operation. Texas Instruments substitutes operate within -40°C to 85°C, which is acceptable for most industrial and commercial applications but represents a narrower range.

Package Considerations: The main part uses 16-SSOP packaging (5.30mm width). Substitute parts use 16-TSSOP packaging (4.40mm width), which is mechanically and electrically compatible but represents a different physical footprint requiring PCB layout verification.

Compliance: All parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN/HTSUS classifications, ensuring regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HC151PWR (Texas Instruments) is the preferred substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. It provides identical functional performance, full voltage and logic compatibility, and enhanced output current capability (7.8mA versus 5.2mA). The 16-TSSOP package is mechanically compatible with standard surface mount assembly processes.

Secondary Options: SN74HC151PW and SN74HC151PWT are functionally equivalent alternatives with identical electrical specifications. Both are discontinued at DiGi Electronics but may be available through alternative distribution channels. Selection between these variants depends on packaging requirements (tube versus cut tape/Digi-Reel).

Package Transition Consideration: Migration from 16-SSOP to 16-TSSOP packaging requires PCB layout verification due to the 0.90mm width reduction. Both packages maintain identical pin pitch and electrical connectivity, supporting direct functional substitution with layout accommodation.

Compliance Verification: All substitute parts maintain equivalent regulatory compliance (ROHS3, REACH unaffected, EAR99 ECCN classification), supporting direct replacement in regulated applications without additional certification requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC151PWR directly replace 74HC151DB,112 on existing PCBs?

A: Electrical and functional replacement is direct. Package transition from 16-SSOP to 16-TSSOP requires PCB footprint verification. Both packages use identical pin pitch (0.65mm) and electrical connectivity, but the 0.90mm width reduction must be accommodated in layout. Consult PCB design files to confirm pad compatibility.

Q: What is the significance of the output current difference (5.2mA vs. 7.8mA)?

A: The Texas Instruments substitutes provide 50% higher output current capability. This represents enhanced drive strength and is functionally compatible with designs specified for the lower 5.2mA output. Applications requiring the original 5.2mA specification will operate within acceptable margins with the higher-current substitute.

Q: Are there temperature range limitations when substituting?

A: The main part supports -40°C to 125°C operation. Texas Instruments substitutes operate within -40°C to 85°C. For applications requiring operation above 85°C, the original Nexperia part or alternative sources must be evaluated. Most industrial and commercial applications operate within the -40°C to 85°C range, making substitution acceptable.

Q: Which substitute part offers the best long-term availability?

A: SN74HC151PWR maintains active product status at Texas Instruments, providing the most reliable long-term supply chain position. SN74HC151PW and SN74HC151PWT are discontinued at DiGi Electronics but may be available through secondary distribution. For new designs, SN74HC151PWR is the recommended selection.

Q: Do all substitutes maintain the same regulatory compliance?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and classified under identical ECCN (EAR99) and HTSUS (8542.39.0001) codes. Direct regulatory equivalence is maintained across all substitution options.

Q: What packaging options are available for the Texas Instruments substitutes?

A: SN74HC151PWR is supplied in cut tape and Digi-Reel packaging. SN74HC151PW is supplied in tube packaging. SN74HC151PWT is supplied in cut tape and Digi-Reel packaging. Selection depends on assembly process requirements and minimum order quantities.