MM74HC157SJ Equivalent & Substitute Parts

Part Overview

The MM74HC157SJ is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply range with output currents of 5.2mA for both high and low states, serving applications requiring signal multiplexing in digital logic circuits.

Substiute Parts

MM74HC157SJ

onsemiIn Stock: 881MM74HC157SJ Datasheet

Current PartRFQ

SN74HC157NSR

Texas InstrumentsIn Stock: 4080SN74HC157NSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC157SJ is determined by strict alignment across the following critical parameters:

• Circuit Configuration: Must be 4 x 2:1 multiplexer topology
• Package Type: Must be 16-SOIC (0.209", 5.30mm Width) for PCB compatibility
• Voltage Supply Range: Must support 2V ~ 6V operation
• Operating Temperature Range: Must cover -40°C ~ 85°C
• Mounting Type: Must be Surface Mount
• Base Product Number: Must be 74HC157 series

The SN74HC157NSR from Texas Instruments meets all substitution criteria. Both parts share identical circuit configuration, package dimensions, voltage specifications, and temperature ratings. The substitute maintains full functional and mechanical compatibility while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC157NSR is the qualified substitute for the obsolete MM74HC157SJ. Selection is based on:

• Functional Equivalence: Both parts implement identical 4 x 2:1 multiplexer logic with matching circuit topology
• Package Compatibility: Identical 16-SOIC package dimensions ensure direct PCB footprint compatibility without layout modifications
• Electrical Specifications: Both parts operate within the same 2V to 6V supply range and -40°C to 85°C temperature window
• Compliance Status: Both parts maintain REACH Unaffected and EAR99 ECCN classifications
• Product Availability: The Texas Instruments substitute is active production status with established supply chain availability, addressing the obsolescence of the original onsemi part
• Output Current: The SN74HC157NSR provides higher output current capability (7.8mA vs 5.2mA), which is a non-limiting enhancement for existing designs

Frequently Asked Questions (FAQ)

Q: Can the SN74HC157NSR be used as a direct replacement for MM74HC157SJ?

A: Yes. Both parts share identical circuit configuration (4 x 2:1 multiplexer), package type (16-SOIC), voltage supply range (2V ~ 6V), and operating temperature range (-40°C ~ 85°C). The parts are pin-compatible and functionally equivalent.

Q: Are there any electrical differences between these parts?

A: The SN74HC157NSR provides higher output current capability (7.8mA vs 5.2mA for both high and low states). This represents improved drive capability and does not create compatibility issues in existing designs.

Q: What is the package compatibility between these parts?

A: Both parts use the 16-SOIC (0.209", 5.30mm Width) package. PCB footprints are identical, and no layout modifications are required for substitution.

Q: Why is the MM74HC157SJ listed as obsolete?

A: The MM74HC157SJ has been discontinued by onsemi. The SN74HC157NSR from Texas Instruments remains in active production and serves as the recommended alternative for new designs and ongoing procurement.

Q: Are compliance certifications maintained with the substitute part?

A: Yes. Both parts maintain identical REACH Unaffected status, EAR99 ECCN classification, and MSL 1 (Unlimited) moisture sensitivity rating.