MC74ACT157D Equivalent & Substitute Parts

Part Overview

The MC74ACT157D is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MC74ACT157D operates as a single multiplexer circuit with dual supply voltage capability and is suitable for applications requiring signal routing and data selection in digital systems.

Substiute Parts

MC74ACT157D

onsemiIn Stock: 2560MC74ACT157D Datasheet

Current PartRFQ

MC74ACT157DG

onsemiIn Stock: 1689MC74ACT157DG Datasheet

DirectRFQ

CD74ACT157M

Harris CorporationIn Stock: 1347CD74ACT157M Datasheet

SimilarRFQ

CD74ACT157M96

Texas InstrumentsIn Stock: 25290CD74ACT157M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MC74ACT157D is determined by strict equivalence in the following parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-SOIC surface mount
• Voltage supply range: 4.5V ~ 5.5V
• Output current capability: 24mA high and low
• Independent circuits: 1
• Base product series: 74ACT

Substitute parts must maintain identical electrical performance within these specified parameters. Parts are grouped as direct equivalents (same manufacturer, different packaging) or similar equivalents (different manufacturers, same base series and electrical specifications).

Parameter Comparison

Engineering Selection Recommendations

MC74ACT157DG (onsemi) is the primary direct substitute. It maintains identical electrical specifications and package configuration as the MC74ACT157D while offering active product status and ROHS3 compliance. This part is the preferred choice for new designs and ongoing procurement.

CD74ACT157M96 (Texas Instruments) is a functionally equivalent alternative with extended operating temperature range (-55°C ~ 125°C) and active product status. This part is suitable for applications requiring wider temperature performance and is ROHS3 compliant. Packaging is supplied as Tape & Reel (TR).

CD74ACT157M (Harris Corporation) is functionally equivalent with extended operating temperature range but carries obsolete product status. This part should be considered only when MC74ACT157DG or CD74ACT157M96 are unavailable.

Selection should prioritize active product status parts (MC74ACT157DG or CD74ACT157M96) to ensure long-term availability and compliance with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT157DG directly replace MC74ACT157D in existing designs?

A: Yes. MC74ACT157DG is a direct equivalent with identical electrical specifications, package type, and pin configuration. The primary difference is product status (active vs. obsolete) and improved RoHS compliance.

Q: What is the difference between the onsemi and Texas Instruments versions?

A: Both MC74ACT157DG (onsemi) and CD74ACT157M96 (Texas Instruments) are functionally equivalent 4 x 2:1 multiplexers in 16-SOIC packages. The Texas Instruments version offers extended operating temperature range (-55°C ~ 125°C) compared to the onsemi version (-40°C ~ 85°C). Packaging differs: onsemi is supplied in tubes, while Texas Instruments is supplied in Tape & Reel format.

Q: Are there any pin or footprint differences between these parts?

A: No. All substitute parts use the identical 16-SOIC package with 0.154" width and 3.90mm body width. PCB footprints are interchangeable.

Q: Why is the MC74ACT157D marked as obsolete?

A: The MC74ACT157D has reached end-of-life status with onsemi. Active equivalents are available from the same manufacturer (MC74ACT157DG) and other manufacturers (CD74ACT157M96 from Texas Instruments).

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution. Parts with extended temperature ranges (-55°C ~ 125°C) are suitable replacements for applications requiring only -40°C ~ 85°C operation. However, if your application requires the narrower temperature range, verify that the substitute part meets your specific thermal requirements.

Q: What packaging options are available for these substitutes?

A: MC74ACT157DG is supplied in tube packaging. CD74ACT157M96 is supplied in Tape & Reel (TR) format. Both are surface mount 16-SOIC packages suitable for automated assembly.