74ACT253SCX Equivalent & Substitute Parts

Part Overview

The 74ACT253SCX is a 2 x 4:1 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 74ACT253 series provides dual 4-to-1 multiplexing functionality with single supply voltage operation, suitable for digital signal routing and data selection applications in logic circuits.

Substiute Parts

74ACT253SCX

onsemiIn Stock: 414974ACT253SCX Datasheet

Current PartRFQ

MC74ACT253DR2G

onsemiIn Stock: 5144MC74ACT253DR2G Datasheet

DirectRFQ

MC74ACT153DR2G

onsemiIn Stock: 1004MC74ACT153DR2G Datasheet

Parametric EquivalentRFQ

CD74ACT253M

Harris CorporationIn Stock: 3070CD74ACT253M Datasheet

SimilarRFQ

CD74ACT253M96

Texas InstrumentsIn Stock: 5650CD74ACT253M96 Datasheet

SimilarRFQ

MC74ACT253DG

onsemiIn Stock: 811MC74ACT253DG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACT253SCX is determined by the following critical parameters: circuit configuration (2 x 4:1 multiplexer), package type (16-SOIC), supply voltage range (4.5V ~ 5.5V), and output current capability (24mA minimum). Parts are grouped into three categories based on substitution relationship and parameter alignment:

Direct Manufacturer Substitute: MC74ACT253DR2G maintains identical electrical specifications and circuit configuration with active product status and improved packaging (Tape & Reel).

Parametric Equivalent: MC74ACT153DR2G provides equivalent electrical performance and package compatibility, though the base product number differs (74ACT153 vs 74ACT253), indicating a related but distinct device variant.

Similar Alternatives: CD74ACT253M96, CD74ACT253M, and MC74ACT253DG offer the same circuit topology and package but may have different output current ratings, temperature ranges, or compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MC74ACT253DR2G is the preferred substitute. It maintains identical electrical specifications (24mA output current, -40°C to 85°C operating range) and package configuration as the 74ACT253SCX while offering active product status and ROHS3 compliance. Tape & Reel packaging provides improved handling for automated assembly.

Secondary Option: MC74ACT153DR2G is functionally equivalent with identical electrical performance and active status. The base product number difference (74ACT153) reflects a related device variant within the same functional class, suitable for applications where the specific base number is not a design constraint.

Extended Temperature Alternative: CD74ACT253M96 (Texas Instruments) provides expanded operating temperature range (-55°C to 125°C) and higher output current capability (75mA), with active product status and ROHS3 compliance. This option is appropriate for applications requiring enhanced thermal performance or higher drive capability.

Avoid: CD74ACT253M (Harris Corporation) and MC74ACT253DG are obsolete. CD74ACT253M additionally carries RoHS non-compliance status, making it unsuitable for new designs subject to environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT253DR2G directly replace 74ACT253SCX in existing designs? A: Yes. MC74ACT253DR2G maintains identical electrical specifications, package type, and pin configuration. The primary difference is active product status and improved packaging format (Tape & Reel vs. standard packaging).

Q: What is the difference between MC74ACT253DR2G and MC74ACT153DR2G? A: Both parts provide identical electrical performance and package compatibility. The base product number difference (74ACT253 vs. 74ACT153) indicates related but distinct device variants. Selection depends on design documentation requirements and supplier availability.

Q: Why do CD74ACT253M96 and CD74ACT253M have higher output current ratings (75mA vs. 24mA)? A: These parts are manufactured by different suppliers (Texas Instruments and Harris Corporation) and may employ different output stage designs. Higher current capability provides greater drive strength but is not required for applications designed around 24mA specifications.

Q: Is the 16-SOIC package identical across all substitute parts? A: Yes. All listed parts use the 16-SOIC package with 0.154" (3.90mm) width, ensuring mechanical and electrical compatibility in PCB layouts.

Q: Which substitute parts are compliant with current environmental regulations? A: MC74ACT253DR2G, MC74ACT153DR2G, and CD74ACT253M96 are ROHS3 compliant. CD74ACT253M is RoHS non-compliant and should not be used in new designs subject to environmental standards.

Q: Can I use CD74ACT253M96 in applications with temperature constraints below -55°C or above 125°C? A: No. CD74ACT253M96 is rated for -55°C to 125°C operation. For the original -40°C to 85°C range, MC74ACT253DR2G or MC74ACT153DR2G are appropriate selections.