DM74157N Equivalent & Substitute Parts

Part Overview

The DM74157N is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in the 7400 series. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The DM74157N performs digital multiplexing functions in through-hole 16-DIP packaging, suitable for legacy system maintenance and component replacement scenarios.

Substiute Parts

DM74157N

onsemiIn Stock: 1916DM74157N Datasheet

Current PartRFQ

SN74LS157N

Texas InstrumentsIn Stock: 13698SN74LS157N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74LS157N qualifies as a direct substitute for the DM74157N based on the following critical parameters:

• Circuit Configuration: Both parts implement identical 4 x 2:1 multiplexer logic
• Package / Case: Both use 16-DIP (0.300", 7.62mm) through-hole packaging
• Voltage Supply Range: Both operate within 4.75V ~ 5.25V
• Operating Temperature Range: Both support 0°C ~ 70°C
• Mounting Type: Both are through-hole mounted components

The SN74LS157N represents an active product from Texas Instruments in the 74LS series, providing functional equivalence with improved availability and modern manufacturing compliance.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS157N is the appropriate substitute for the DM74157N based on product lifecycle and compliance status. The DM74157N is obsolete, whereas the SN74LS157N maintains active production status with ROHS3 compliance certification. Both components share identical functional specifications, voltage supply ranges, operating temperature ranges, and through-hole 16-DIP packaging, ensuring direct pin-compatible replacement in existing circuit designs.

The SN74LS157N exhibits lower output current specifications (400µA high, 8mA low) compared to the DM74157N (800µA high, 16mA low). This difference reflects the LS-series design characteristics and does not affect functional compatibility in standard multiplexer applications where output current requirements remain within the SN74LS157N specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS157N directly replace the DM74157N in existing designs?

A: Yes. Both components implement identical 4 x 2:1 multiplexer logic in 16-DIP through-hole packaging with matching voltage supply and operating temperature specifications. Pin-for-pin replacement is supported.

Q: What is the primary difference between these two parts?

A: The DM74157N is obsolete, while the SN74LS157N is an active product. The SN74LS157N operates at lower output current levels (400µA high, 8mA low versus 800µA high, 16mA low) due to LS-series design characteristics. The SN74LS157N also carries ROHS3 compliance certification.

Q: Are there any package or mounting differences?

A: No. Both parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging and mounting type, ensuring mechanical compatibility in PCB designs.

Q: What compliance certifications apply to the SN74LS157N?

A: The SN74LS157N is ROHS3 compliant and REACH unaffected. Both components share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: Is the lower output current of the SN74LS157N a limitation?

A: The output current difference reflects LS-series design specifications. For standard multiplexer applications, the SN74LS157N output current remains adequate. Applications requiring the higher current output of the original DM74157N should be evaluated against actual load requirements.