MM74HC157N Equivalent & Substitute Parts

Part Overview

The MM74HC157N is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi, housed in a 16-DIP package. This component functions as a data selector, routing one of two input signals to a single output based on control logic. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

MM74HC157N

onsemiIn Stock: 2772MM74HC157N Datasheet

Current PartRFQ

CD74HC157E

Harris CorporationIn Stock: 1370CD74HC157E Datasheet

DirectRFQ

SN74HC157N

Texas InstrumentsIn Stock: 3600SN74HC157N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MM74HC157N is determined by strict adherence to the following electrical and mechanical parameters:

• Base product number must be 74HC157
• Circuit configuration must be 4 x 2:1 multiplexer
• Package must be 16-DIP (0.300", 7.62mm) through-hole
• Voltage supply range must encompass or match 2V ~ 6V
• Operating temperature range must support the application requirements
• Output current specifications must be compatible with load requirements

The identified substitutes share the same base product number, circuit topology, and physical package, ensuring functional and mechanical interchangeability within the specified electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

SN74HC157N (Texas Instruments) is the primary substitute for new designs and ongoing procurement. This part maintains active product status, ensuring long-term availability and supply chain stability. The SN74HC157N provides higher output current capability (7.8mA versus 5.2mA), offering improved drive capability for load applications. RoHS3 compliance status supports modern manufacturing and environmental requirements.

CD74HC157E (Harris Corporation) serves as a secondary equivalent for applications requiring extended operating temperature range (-55°C ~ 125°C). This part is suitable for designs operating outside the standard -40°C ~ 85°C window. However, obsolete status may limit future availability.

Both substitutes maintain identical voltage supply specifications (2V ~ 6V), package geometry (16-DIP), and circuit topology (4 x 2:1 multiplexer), ensuring direct functional replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can SN74HC157N replace MM74HC157N in existing designs? A: Yes. Both parts share identical circuit configuration, package type, and voltage supply specifications. The SN74HC157N provides equal or superior electrical performance with higher output current capability.

Q: What is the primary difference between these substitutes? A: The SN74HC157N (Texas Instruments) maintains active product status with RoHS3 compliance, while CD74HC157E (Harris Corporation) offers extended temperature range (-55°C ~ 125°C) but is obsolete. Output current differs: SN74HC157N provides 7.8mA versus 5.2mA for the original and CD74HC157E.

Q: Are there packaging differences between these parts? A: No. All three parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical interchangeability on printed circuit boards.

Q: Which substitute should be selected for new designs? A: SN74HC157N is recommended for new designs due to active product status, ensuring availability and supply chain continuity.

Q: Do these parts require different PCB layouts? A: No. Identical DIP package specifications ensure direct pin-for-pin compatibility without layout modifications.