SN74ALS253D Equivalent & Substitute Parts

Part Overview

The SN74ALS253D 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. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements for applications utilizing this multiplexer function.

Substiute Parts

SN74ALS253D

Texas InstrumentsIn Stock: 1485SN74ALS253D Datasheet

Current PartRFQ

SN74ALS253DR

Texas InstrumentsIn Stock: 972SN74ALS253DR Datasheet

MFR RecommendedRFQ

SN74ALS153D

Texas InstrumentsIn Stock: 1255SN74ALS153D Datasheet

Parametric EquivalentRFQ

SN74AS153D

Texas InstrumentsIn Stock: 1187SN74AS153D Datasheet

Parametric EquivalentRFQ

SN74AS253AD

Texas InstrumentsIn Stock: 745SN74AS253AD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ALS253D are determined by equivalence in the following critical parameters:

• Circuit configuration: 2 x 4:1 multiplexer function
• Package type: 16-SOIC surface mount
• Electrical specifications: 4.5V ~ 5.5V supply voltage, 2.6mA / 24mA output current ratings
• Operating temperature range: 0°C ~ 70°C
• Compliance certifications: ROHS3, REACH Unaffected, EAR99

Substitutes are grouped into two categories: MFR Recommended (same base part number, different packaging) and Parametric Equivalents (different series or base part numbers with identical electrical and mechanical specifications).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74ALS253DR

The SN74ALS253DR is the MFR recommended substitute for SN74ALS253D. Both parts share identical electrical specifications, circuit configuration, and package dimensions. The primary difference is packaging format: SN74ALS253DR is supplied in Tape & Reel (TR) format versus Tube format for the original part. SN74ALS253DR maintains Active product status, ensuring continued availability and manufacturing support from Texas Instruments.

Secondary Substitutes: SN74ALS153D

The SN74ALS153D is a parametric equivalent within the 74ALS series. All electrical and mechanical specifications are identical to SN74ALS253D. This part is also Last Time Buy status. Selection between SN74ALS253D and SN74ALS153D depends on inventory availability and packaging requirements.

Alternative Substitutes: SN74AS253AD, SN74AS153D

The SN74AS series parts (SN74AS253AD and SN74AS153D) provide parametric equivalence with identical electrical performance and package specifications. SN74AS253AD maintains Active status, while SN74AS153D is Obsolete. All parts meet ROHS3 compliance and REACH requirements. Selection of 74AS series alternatives should be based on long-term availability requirements and supply chain strategy.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS253DR be used as a direct replacement for SN74ALS253D?

A: Yes. SN74ALS253DR is electrically and mechanically identical to SN74ALS253D. The only difference is packaging format (Tape & Reel versus Tube). Both are 16-SOIC surface mount packages with identical pin configurations and electrical specifications. SN74ALS253DR is recommended due to Active product status.

Q: What is the difference between 74ALS and 74AS series multiplexers?

A: Both 74ALS and 74AS series provide identical electrical specifications for the SN74ALS253D and SN74AS253AD comparison: 2 x 4:1 circuit configuration, 4.5V ~ 5.5V supply voltage, 2.6mA / 24mA output current, and 16-SOIC packaging. The series designation indicates different logic family implementations by Texas Instruments. Selection between series should be based on product status and availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SN74ALS253DR, SN74ALS153D, SN74AS253AD, SN74AS153D) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are REACH Unaffected and classified as EAR99 for export purposes.

Q: What packaging options are available for equivalent parts?

A: Packaging options include Tube (SN74ALS253D, SN74ALS153D, SN74AS253AD) and Tape & Reel (SN74ALS253DR). All parts use identical 16-SOIC (0.154", 3.90mm Width) surface mount package. Packaging selection depends on production volume and assembly process requirements.

Q: Should I avoid Obsolete status parts like SN74AS153D?

A: Obsolete parts may have limited inventory availability. For new designs or long-term production, Active status parts (SN74ALS253DR, SN74AS253AD) are preferred. Last Time Buy parts (SN74ALS253D, SN74ALS153D) indicate limited future availability and should be evaluated based on project timeline and supply requirements.