74ACT157MTR Equivalent & Substitute Parts

Part Overview

The 74ACT157MTR is a 4 x 2:1 multiplexer logic integrated circuit manufactured by STMicroelectronics in a 16-SOIC surface mount package. This component is classified as obsolete, indicating that the original manufacturer has discontinued production. The 74ACT157 series multiplexer performs data selection and routing functions in digital logic applications, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

74ACT157MTR

STMicroelectronicsIn Stock: 596274ACT157MTR Datasheet

Current PartRFQ

CD74ACT157M

Harris CorporationIn Stock: 1347CD74ACT157M Datasheet

SimilarRFQ

MC74ACT157DG

onsemiIn Stock: 1689MC74ACT157DG Datasheet

SimilarRFQ

MC74ACT157DR2G

onsemiIn Stock: 5604MC74ACT157DR2G Datasheet

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CD74ACT157M96

Texas InstrumentsIn Stock: 25290CD74ACT157M96 Datasheet

Parametric EquivalentRFQ

CD74ACT158M96

Texas InstrumentsIn Stock: 2219CD74ACT158M96 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT157MTR is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Independent circuits: 1 unit
• Output current specifications: 24mA high and low

Electrical Parameters:

• Supply voltage range: 4.5V to 5.5V single supply
• Operating temperature range compatibility

Physical Parameters:

• Package type: 16-SOIC form factor
• Surface mount mounting type
• Pin-to-pin compatibility within the 16-SOIC standard

Substitute parts must maintain identical functional specifications and package footprints. Operating temperature range variations are noted where they differ from the original specification but do not prevent functional substitution when application requirements fall within the substitute's rated range.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

CD74ACT157M96 and CD74ACT158M96 from Texas Instruments are the preferred substitutes. Both parts maintain the full operating temperature range of -55°C to 125°C, matching the original 74ACT157MTR specification. Both are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring long-term availability and environmental regulation compliance.

Secondary Substitutes (Temperature-Limited):

MC74ACT157DG and MC74ACT157DR2G from onsemi are functionally equivalent but operate within a reduced temperature range of -40°C to 85°C. These parts are active products with ROHS3 compliance. The MC74ACT157DR2G is supplied in Tape & Reel packaging, while MC74ACT157DG is supplied in Tube packaging. Selection between these two depends on procurement and assembly requirements.

Obsolete Substitute (Not Recommended for New Designs):

CD74ACT157M from Harris Corporation is obsolete and RoHS non-compliant. This part should not be selected for new applications or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can the MC74ACT157DG substitute for the 74ACT157MTR in all applications?

A: The MC74ACT157DG is functionally equivalent in circuit configuration, output current, and supply voltage. However, it operates within -40°C to 85°C, which is narrower than the original -55°C to 125°C range. Substitution is valid only when the application's operating temperature requirements fall within -40°C to 85°C.

Q: What is the difference between MC74ACT157DG and MC74ACT157DR2G?

A: Both parts are electrically and functionally identical. The primary difference is packaging: MC74ACT157DG is supplied in Tube packaging, while MC74ACT157DR2G is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and procurement preferences.

Q: Why is CD74ACT157M96 preferred over CD74ACT157M?

A: CD74ACT157M96 is an active product with ROHS3 compliance, while CD74ACT157M is obsolete and RoHS non-compliant. CD74ACT157M96 ensures long-term availability and regulatory compliance for production applications.

Q: Are all substitute parts pin-compatible with the 74ACT157MTR?

A: Yes. All listed substitutes use the 16-SOIC package with identical pin assignments and footprints, ensuring direct mechanical and electrical compatibility.

Q: What does the "96" designation in CD74ACT157M96 indicate?

A: The "96" suffix indicates the specific packaging configuration and manufacturing date code designation used by Texas Instruments. It does not affect functional equivalence or electrical specifications.

Q: Can CD74ACT158M96 be used as a substitute for 74ACT157MTR?

A: CD74ACT158M96 maintains identical electrical specifications, output current, supply voltage, and operating temperature range. The base product number differs (74ACT158 versus 74ACT157), but the functional circuit configuration and pin compatibility remain equivalent for direct substitution.