74AC253SCX Equivalent & Substitute Parts

Part Overview

The 74AC253SCX 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 data selection and routing applications in digital logic circuits.

Substiute Parts

74AC253SCX

onsemiIn Stock: 174574AC253SCX Datasheet

Current PartRFQ

MC74AC253DR2G

onsemiIn Stock: 3300MC74AC253DR2G Datasheet

DirectRFQ

CD74AC253M

Texas InstrumentsIn Stock: 2280CD74AC253M Datasheet

SimilarRFQ

CD74AC253M96

Texas InstrumentsIn Stock: 1263CD74AC253M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC253SCX is determined by the following critical parameters: identical circuit configuration (2 x 4:1 multiplexer), compatible package type (16-SOIC), matching supply voltage compatibility, and surface mount mounting type. Parts are grouped into two categories based on electrical performance specifications.

Direct Substitute Category: Parts meeting or exceeding all electrical parameters within the original specification envelope, including output current drive and operating temperature range.

Compatible Substitute Category: Parts with equivalent circuit function and package compatibility but with enhanced electrical performance specifications that exceed the original part requirements.

Parameter Comparison

Engineering Selection Recommendations

MC74AC253DR2G (onsemi): This part is the primary direct substitute for the 74AC253SCX. It maintains identical electrical specifications including output current drive (24mA/24mA) and operating temperature range (-40°C ~ 85°C). The part is currently in active production status with ROHS3 compliance certification. Packaging is available in Tape & Reel format suitable for automated assembly processes.

CD74AC253M96 (Texas Instruments): This part is recommended as a compatible substitute when enhanced performance specifications are acceptable. It provides superior output current capability (75mA/75mA) and extended operating temperature range (-55°C ~ 125°C). The part is in active production status with ROHS3 compliance. Tape & Reel packaging is standard. The wider supply voltage range (1.5V ~ 5.5V) provides additional design flexibility.

CD74AC253M (Texas Instruments): This part offers equivalent performance to CD74AC253M96 but is supplied in Tube packaging format. Product status is Last Time Buy, indicating limited future availability. Selection should prioritize CD74AC253M96 for new designs requiring Texas Instruments sourcing.

Frequently Asked Questions (FAQ)

Q: Can MC74AC253DR2G directly replace 74AC253SCX without circuit modifications?

A: Yes. MC74AC253DR2G maintains identical electrical specifications for supply voltage (2V ~ 6V), output current (24mA/24mA), and operating temperature range (-40°C ~ 85°C). The 16-SOIC package footprint is identical. No circuit modifications are required.

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

A: The Texas Instruments CD74AC253M and CD74AC253M96 parts provide enhanced output current capability (75mA vs. 24mA) and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). Both are functionally compatible but offer superior performance margins. Supply voltage range differs slightly (1.5V ~ 5.5V vs. 2V ~ 6V).

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Tube packaging formats contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and volume considerations, not electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: MC74AC253DR2G, CD74AC253M, and CD74AC253M96 are all ROHS3 compliant. The original 74AC253SCX RoHS status was not specified in available documentation.

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

A: MC74AC253DR2G is recommended for designs requiring exact electrical specification matching. CD74AC253M96 is recommended when enhanced performance margins and extended temperature range provide design benefits. Both parts are in active production status.

Q: Is the 74AC253 series compatible with both TTL and CMOS logic levels?

A: The 74AC series is CMOS technology. Compatibility with TTL logic levels depends on specific circuit implementation and voltage levels. Refer to detailed device datasheets for logic level specifications.