74AC253SC Equivalent & Substitute Parts

Part Overview

The 74AC253SC 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 new designs and ongoing production requirements. The 74AC253 series provides dual 4-to-1 multiplexing functionality suitable for signal routing and data selection applications in digital logic circuits.

Substiute Parts

74AC253SC

onsemiIn Stock: 185774AC253SC Datasheet

Current PartRFQ

MC74AC253DR2G

onsemiIn Stock: 3300MC74AC253DR2G Datasheet

DirectRFQ

CD74AC253M

Texas InstrumentsIn Stock: 2280CD74AC253M Datasheet

SimilarRFQ

CD74AC253M96

Texas InstrumentsIn Stock: 1263CD74AC253M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC253SC is determined by the following critical parameters:

• Circuit configuration (2 x 4:1 multiplexer function)
• Package type (16-SOIC form factor)
• Surface mount mounting type
• Electrical compatibility within specified voltage and current ranges

Two categories of substitutes are identified:

Direct Substitute (Electrical and Mechanical Compatibility): MC74AC253DR2G maintains identical electrical specifications and package format, ensuring pin-for-pin compatibility.

Compatible Substitutes (Functional Equivalence with Enhanced Specifications): CD74AC253M and CD74AC253M96 provide the same multiplexer function and package type but with improved electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

MC74AC253DR2G is the primary direct substitute for 74AC253SC. It maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. This part is suitable for applications requiring exact electrical parameter matching.

CD74AC253M and CD74AC253M96 are compatible alternatives that provide enhanced electrical performance with higher output current capability (75mA versus 24mA) and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). Both parts are ROHS3 compliant. CD74AC253M96 is the preferred option among Texas Instruments variants due to active product status, while CD74AC253M remains available as Last Time Buy inventory.

Selection between direct and compatible substitutes depends on application requirements. Direct substitution with MC74AC253DR2G is appropriate for designs with existing electrical margin. Compatible substitutes from Texas Instruments are suitable for applications requiring enhanced performance specifications or extended environmental operating conditions.

Frequently Asked Questions (FAQ)

Q: Can MC74AC253DR2G replace 74AC253SC in existing designs without modification?

A: Yes. MC74AC253DR2G is a direct substitute with identical electrical specifications (24mA output current, 2V-6V supply range, -40°C to 85°C operating temperature) and identical 16-SOIC package configuration. No circuit modifications are required.

Q: What are the differences between the onsemi and Texas Instruments variants?

A: The Texas Instruments CD74AC253M and CD74AC253M96 provide higher output current (75mA versus 24mA), wider supply voltage range (1.5V-5.5V versus 2V-6V), and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). All variants share the same 16-SOIC package and 2 x 4:1 multiplexer function.

Q: Are packaging differences between tube and tape & reel significant for substitution?

A: Packaging format (tube versus tape & reel) affects handling and assembly processes but does not impact electrical compatibility or functional substitution. The underlying component specifications remain identical.

Q: Which substitute part should be selected for new production designs?

A: CD74AC253M96 is recommended for new designs due to active product status, ROHS3 compliance, and enhanced electrical specifications. This ensures long-term availability and compliance with current manufacturing standards.

Q: Can CD74AC253M or CD74AC253M96 be used in applications designed for 74AC253SC?

A: Yes. The enhanced specifications of Texas Instruments variants (higher current capability and extended temperature range) are backward compatible with 74AC253SC applications. The 16-SOIC package and multiplexer function are identical.