SN74ALS153D Equivalent & Substitute Parts

Part Overview

The SN74ALS153D 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 SN74ALS153D operates with a single supply voltage between 4.5V and 5.5V, making it suitable for standard TTL logic applications requiring multiplexing functionality across two independent 4:1 channels.

Identifying equivalent and substitute parts is necessary due to product status constraints and packaging availability variations. Alternative part numbers within the same logic family provide functional equivalence while offering different packaging formats or active product status for long-term supply chain reliability.

Key Parameters

Parameter	Value
Type	Multiplexer
Circuit Configuration	2 x 4:1
Independent Circuits	1
Current - Output High	2.6mA
Current - Output Low	24mA
Voltage Supply	4.5V ~ 5.5V
Operating Temperature Range	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS153D is determined by the following critical parameters: circuit configuration (2 x 4:1), package type (16-SOIC), voltage supply range (4.5V ~ 5.5V), output current specifications (2.6mA high, 24mA low), and operating temperature range (0°C ~ 70°C). All identified substitutes maintain identical electrical and mechanical specifications across these parameters.

Substitute parts are grouped into two categories:

MFR Recommended Substitute: SN74ALS153DR differs only in packaging format (Tape & Reel versus Tube) and product status (Active versus Last Time Buy), with all electrical parameters and case dimensions remaining identical.

Parametric Equivalents: SN74ALS253D, SN74AS153D, and SN74AS253AD maintain all critical electrical and mechanical parameters. Variations exist in series designation (74ALS versus 74AS) and product status, but functional substitution is supported by identical circuit configuration, voltage supply, current ratings, and package dimensions.

Parameter Comparison

Part Number	Manufacturer	Series	Circuit	Voltage Supply	Output Current (High/Low)	Package	Packaging Format	Product Status	Inventory
SN74ALS153D	Texas Instruments	74ALS	2 x 4:1	4.5V ~ 5.5V	2.6mA / 24mA	16-SOIC	Tube	Last Time Buy	1217 Pcs
SN74ALS153DR	Texas Instruments	74ALS	2 x 4:1	4.5V ~ 5.5V	2.6mA / 24mA	16-SOIC	Tape & Reel	Active	3390 Pcs
SN74ALS253D	Texas Instruments	74ALS	2 x 4:1	4.5V ~ 5.5V	2.6mA / 24mA	16-SOIC	Tube	Last Time Buy	1438 Pcs
SN74AS153D	Texas Instruments	74AS	2 x 4:1	4.5V ~ 5.5V	2.6mA / 24mA	16-SOIC	Not Specified	Obsolete	1107 Pcs
SN74AS253AD	Texas Instruments	74AS	2 x 4:1	4.5V ~ 5.5V	2.6mA / 24mA	16-SOIC	Tube	Active	733 Pcs

Engineering Selection Recommendations

Primary Substitute: SN74ALS153DR is the recommended substitute for the SN74ALS153D. Both parts share identical electrical specifications and 16-SOIC package dimensions. The primary distinction is packaging format (Tape & Reel versus Tube) and product status (Active versus Last Time Buy). SN74ALS153DR maintains Active product status, ensuring continued availability and supply chain support. Both parts are ROHS3 compliant with MSL 1 rating.

Secondary Substitutes: SN74ALS253D and SN74AS253AD are parametric equivalents with identical electrical and mechanical specifications. SN74ALS253D maintains the same 74ALS series designation as the primary part. SN74AS253AD carries Active product status, providing long-term availability assurance, though it belongs to the 74AS series rather than 74ALS.

Avoid: SN74AS153D is classified as Obsolete and should not be selected for new designs or long-term applications despite meeting all electrical parameters.

All recommended substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS153DR be used as a direct replacement for SN74ALS153D?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: SN74ALS153DR is supplied in Tape & Reel format while SN74ALS153D is supplied in Tube format. Both fit the same 16-SOIC footprint and operate identically in circuit applications.

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

A: Both series meet the specified electrical parameters for this application: 2 x 4:1 circuit configuration, 4.5V ~ 5.5V supply voltage, and identical output current ratings. The series designation reflects different logic family implementations, but functional substitution is supported by matching electrical specifications.

Q: Why is SN74AS153D listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While the part may still be available from inventory, it should not be selected for new designs or applications requiring long-term component availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts, including the main part SN74ALS153D and all substitutes, are ROHS3 compliant with MSL 1 moisture sensitivity rating.

Q: Does packaging format affect circuit performance?

A: No. Tube and Tape & Reel packaging formats contain identical components. The format difference affects only handling, storage, and automated assembly compatibility. Electrical and mechanical specifications remain unchanged.

Q: Which substitute offers the best long-term availability?

A: SN74ALS153DR and SN74AS253AD both carry Active product status, indicating ongoing manufacturer support. SN74ALS153DR is preferred as it maintains the same 74ALS series designation as the original part.

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