CD74AC253M Equivalent & Substitute Parts

Part Overview

The CD74AC253M is a 2 x 4:1 multiplexer logic integrated circuit manufactured by Texas Instruments in 16-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. The CD74AC253M operates across a wide temperature range (-55°C to 125°C) and supports single supply voltage operation from 1.5V to 5.5V, making it suitable for general-purpose logic applications requiring multiplexing functionality.

Identifying equivalent and substitute parts is necessary due to the Last Time Buy status, which restricts future procurement from the primary source. Alternative parts with identical or compatible electrical and mechanical specifications ensure design continuity and supply chain reliability.

Substiute Parts

CD74AC253M

Texas InstrumentsIn Stock: 2280CD74AC253M Datasheet

Current PartRFQ

CD74AC253M96

Texas InstrumentsIn Stock: 1263CD74AC253M96 Datasheet

MFR RecommendedRFQ

MC74AC253DR2G

onsemiIn Stock: 3300MC74AC253DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74AC253M are qualified based on the following criteria:

Electrical Compatibility: All substitute parts must implement the same 2 x 4:1 multiplexer circuit topology with identical pin configuration and functional behavior within the 74AC logic family.

Package Compatibility: All parts must use the 16-SOIC surface mount package with 0.154" (3.90mm) width to ensure mechanical interchangeability on printed circuit boards.

Supply Voltage Range: Substitute parts must operate within overlapping voltage supply ranges. The CD74AC253M operates from 1.5V to 5.5V; substitute parts operating within this range or a subset thereof are compatible.

Operating Temperature Range: Substitute parts must support the required temperature range or a subset thereof. The CD74AC253M operates from -55°C to 125°C.

Compliance Standards: All parts must maintain ROHS3 compliance and MSL Level 1 rating to meet environmental and handling requirements.

The CD74AC253M96 (Texas Instruments, Tape & Reel packaging) and MC74AC253DR2G (onsemi, Tape & Reel packaging) meet these criteria as direct functional equivalents with identical circuit topology and package specifications.

Parameter Comparison

Engineering Selection Recommendations

CD74AC253M96 (Texas Instruments): This part is the direct equivalent of the CD74AC253M, differing only in packaging format (Tape & Reel versus Tube). It maintains identical electrical specifications, including 75mA output current capability and the full -55°C to 125°C operating temperature range. The CD74AC253M96 carries Active product status, ensuring continued availability and support. This part is the preferred substitute when supply of the original CD74AC253M becomes constrained.

MC74AC253DR2G (onsemi): This part provides functional equivalence as a 2 x 4:1 multiplexer in 16-SOIC packaging with Active product status. The MC74AC253DR2G operates within a slightly wider supply voltage range (2V to 6V) compared to the CD74AC253M (1.5V to 5.5V), and supports a narrower operating temperature range (-40°C to 85°C). The output current specification is reduced to 24mA compared to 75mA for the CD74AC253M. Selection of this part requires verification that the reduced output current and narrower temperature range are acceptable for the specific application.

Frequently Asked Questions (FAQ)

Q: Can CD74AC253M96 be used as a direct replacement for CD74AC253M?

A: Yes. The CD74AC253M96 is electrically and mechanically identical to the CD74AC253M. The only difference is packaging format: CD74AC253M is supplied in Tube packaging, while CD74AC253M96 is supplied in Tape & Reel format. Both use the same 16-SOIC package and have identical electrical specifications.

Q: What are the key differences between CD74AC253M and MC74AC253DR2G?

A: The MC74AC253DR2G differs in three specifications: (1) Operating temperature range is -40°C to 85°C versus -55°C to 125°C; (2) Output current is 24mA versus 75mA; (3) Supply voltage range is 2V to 6V versus 1.5V to 5.5V. These differences must be evaluated against application requirements before substitution.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 16-SOIC package with identical pin configuration and functional behavior as 2 x 4:1 multiplexers within the 74AC logic family.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, carry MSL Level 1 rating, and are REACH unaffected, meeting identical environmental and handling requirements.

Q: Why is the CD74AC253M marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued or will discontinue production of this part. Customers requiring this component should transition to equivalent parts with Active status, such as CD74AC253M96 or MC74AC253DR2G, to ensure long-term supply availability.