SN74HCS151DR Equivalent & Substitute Parts

Part Overview

The SN74HCS151DR is an 8-line to 1-line data selector/multiplexer manufactured by Texas Instruments, classified as a logic integrated circuit in the 74HCS series. This component functions as a 1 x 8:1 data selector and is supplied in a 16-SOIC surface mount package. The device is currently in active production status with 2,872 units available in new original inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same functional category, package type, and performance specifications. Alternative part numbers within the 74HCS series provide identical or compatible multiplexer functionality for applications requiring component sourcing flexibility or inventory optimization.

Substiute Parts

SN74HCS151DR

Texas InstrumentsIn Stock: 2952SN74HCS151DR Datasheet

Current PartRFQ

SN74HCS151QDRQ1

Texas InstrumentsIn Stock: 2973SN74HCS151QDRQ1 Datasheet

Parametric EquivalentRFQ

SN74HCS251DR

Texas InstrumentsIn Stock: 1478SN74HCS251DR Datasheet

Parametric EquivalentRFQ

SN74HCS251QDRQ1

Texas InstrumentsIn Stock: 3302SN74HCS251QDRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HCS151DR are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Circuit configuration: 1 x 8:1 data selector/multiplexer topology
• Output current specifications: 7.8 mA high and low
• Supply voltage range: 2V ~ 6V single supply operation
• Operating temperature range: -40°C ~ 125°C
• Series classification: 74HCS logic family

Mechanical Equivalence Criteria:

• Package type: 16-SOIC surface mount
• Package dimensions: 0.154" width (3.90mm)
• Mounting technology: Surface mount compatible

Functional Equivalence: All substitute parts maintain identical data selector/multiplexer functionality with one independent circuit configuration. The SN74HCS151DR and SN74HCS251DR share the same base functionality within the 74HCS series, with SN74HCS151QDRQ1 and SN74HCS251QDRQ1 providing automotive-grade variants qualified to AEC-Q100 standards.

Parameter Comparison

Engineering Selection Recommendations

Standard Industrial Applications: The SN74HCS151DR and SN74HCS251DR are functionally equivalent standard-grade multiplexer components suitable for general-purpose logic applications. Both maintain identical electrical performance and package specifications. Selection between these two part numbers depends on inventory availability and supply chain considerations, as both are active products with comparable stock levels.

Automotive and Qualified Applications: The SN74HCS151QDRQ1 and SN74HCS251QDRQ1 are automotive-grade variants qualified to AEC-Q100 standards. These parts are required for applications subject to automotive qualification requirements or reliability standards mandating AEC-Q100 certification. The electrical and mechanical parameters remain identical to standard-grade equivalents, with the distinction being manufacturing process controls and qualification documentation.

Product Status Consideration: All four substitute parts maintain active production status with Texas Instruments, ensuring long-term availability and supply chain stability. No obsolescence risk is associated with any of these alternatives.

Frequently Asked Questions (FAQ)

Q: Can SN74HCS151DR be directly replaced with SN74HCS251DR?

A: Yes. Both parts are 1 x 8:1 data selector/multiplexer circuits in 16-SOIC packages with identical electrical specifications (7.8 mA output current, 2V ~ 6V supply, -40°C ~ 125°C operating range). Direct substitution is supported by equivalent circuit configuration and package compatibility.

Q: What is the difference between standard and automotive-grade variants?

A: The QDRQ1 suffix designates automotive-grade parts qualified to AEC-Q100 standards. Electrical and mechanical parameters are identical to standard-grade equivalents. Automotive variants are required only for applications subject to automotive qualification requirements or reliability standards mandating AEC-Q100 certification.

Q: Are all substitute parts available in the same package?

A: Yes. All four substitute parts (SN74HCS151DR, SN74HCS151QDRQ1, SN74HCS251DR, SN74HCS251QDRQ1) are supplied in 16-SOIC surface mount packages with 0.154" width (3.90mm). Package dimensions and mounting specifications are identical across all alternatives.

Q: Can automotive-grade parts be used in non-automotive applications?

A: Yes. Automotive-grade parts (QDRQ1 variants) meet or exceed standard-grade specifications and can be used in any application where standard-grade parts are specified. The additional AEC-Q100 qualification provides enhanced reliability documentation and manufacturing process controls.

Q: What parameters determine substitution eligibility?

A: Substitution is determined by equivalence in circuit configuration (1 x 8:1), output current (7.8 mA), supply voltage range (2V ~ 6V), operating temperature (-40°C ~ 125°C), package type (16-SOIC), and series classification (74HCS). All substitute parts maintain these specifications.

Q: Is there a difference in moisture sensitivity between parts?

A: No. All substitute parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.