CD74AC157M Equivalent & Substitute Parts

Part Overview

The CD74AC157M is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as Last Time Buy, indicating limited availability and the necessity to identify equivalent alternatives for ongoing production requirements. The CD74AC157M operates across a supply voltage range of 1.5V to 5.5V with output currents of 24mA (high and low), making it suitable for standard logic applications requiring multiplexing functionality.

Substiute Parts

CD74AC157M

Texas InstrumentsIn Stock: 3131CD74AC157M Datasheet

Current PartRFQ

CD74AC157M96

Texas InstrumentsIn Stock: 2723CD74AC157M96 Datasheet

MFR RecommendedRFQ

CD74AC257M

Harris CorporationIn Stock: 1834CD74AC257M Datasheet

Parametric EquivalentRFQ

MC74AC157DG

onsemiIn Stock: 1265MC74AC157DG Datasheet

MFR RecommendedRFQ

MC74AC157DR2G

onsemiIn Stock: 1481MC74AC157DR2G Datasheet

MFR RecommendedRFQ

CD74AC158M

Texas InstrumentsIn Stock: 1945CD74AC158M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74AC157M is determined by the following critical parameters: circuit configuration (4 x 2:1 multiplexer), package type (16-SOIC), mounting method (surface mount), voltage supply compatibility, output current capability, and operating temperature range. Parts are grouped into two categories:

MFR Recommended Substitutes maintain identical or compatible electrical specifications with the main part, ensuring direct functional replacement without circuit modification.

Parametric Equivalents share the same circuit topology and package but may have variations in voltage supply range, output current, operating temperature, or compliance status. These require engineering evaluation for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

CD74AC157M96 is the preferred substitute, offering identical electrical specifications to the main part with Active product status. The only difference is packaging format (Tape & Reel versus Tube), which does not affect functional performance. This part is recommended for applications requiring the same voltage supply range (1.5V ~ 5.5V) and operating temperature range (-55°C ~ 125°C).

CD74AC158M is functionally equivalent with identical electrical parameters and Active status. This part maintains full compatibility with the original specification.

Secondary Substitutes (Conditional Replacement):

MC74AC157DG and MC74AC157DR2G (onsemi manufacturer) are Active alternatives with identical output current specifications. These parts operate within a narrower voltage supply range (2V ~ 6V) and reduced operating temperature range (-40°C ~ 85°C). Selection of these parts requires verification that the application operates within these narrower parameter boundaries.

Not Recommended:

CD74AC257M is Obsolete and RoHS non-compliant, making it unsuitable for new designs or applications requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can CD74AC157M96 replace CD74AC157M directly?

A: Yes. CD74AC157M96 is electrically identical to CD74AC157M with the same voltage supply range, output current, and operating temperature specifications. The difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance.

Q: What is the difference between CD74AC157M and MC74AC157DG?

A: Both parts are 4 x 2:1 multiplexers in 16-SOIC packages with 24mA output current. The key differences are: voltage supply range (CD74AC157M: 1.5V ~ 5.5V; MC74AC157DG: 2V ~ 6V) and operating temperature (CD74AC157M: -55°C ~ 125°C; MC74AC157DG: -40°C ~ 85°C). MC74AC157DG is suitable only if your application operates within its narrower specifications.

Q: Why is CD74AC257M not recommended as a substitute?

A: CD74AC257M is classified as Obsolete and is RoHS non-compliant. Additionally, it has higher output current specifications (75mA versus 24mA), which may not be necessary for the application and indicates a different device variant.

Q: What packaging options are available for CD74AC157M substitutes?

A: Tube packaging is available for CD74AC157M, MC74AC157DG, CD74AC158M, and CD74AC257M. Tape & Reel packaging is available for CD74AC157M96 and MC74AC157DR2G. Selection depends on production volume and assembly requirements.

Q: Are all recommended substitutes RoHS3 compliant?

A: All recommended substitutes (CD74AC157M96, MC74AC157DG, MC74AC157DR2G, and CD74AC158M) are ROHS3 compliant. CD74AC257M is RoHS non-compliant and should not be used in applications requiring regulatory compliance.