DM74ALS258N Equivalent & Substitute Parts

Part Overview

The DM74ALS258N is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The DM74ALS258N performs multiplexing functions in digital logic applications, selecting one of two input signals and routing it to a single output based on control signals.

Substiute Parts

DM74ALS258N

onsemiIn Stock: 1125DM74ALS258N Datasheet

Current PartRFQ

SN74ALS258AN

Texas InstrumentsIn Stock: 5782SN74ALS258AN Datasheet

DirectRFQ

SN74ALS257AN

Texas InstrumentsIn Stock: 2664SN74ALS257AN Datasheet

Parametric EquivalentRFQ

SN74AS258N

Texas InstrumentsIn Stock: 2237SN74AS258N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS258N is determined by strict equivalence across the following electrical and mechanical parameters:

• Circuit Configuration: 4 x 2:1 multiplexer topology
• Package Type: 16-DIP (0.300", 7.62mm) through-hole mounting
• Voltage Supply Range: 4.5V ~ 5.5V single supply
• Output Current Specifications: 2.6mA (high) and 24mA (low)
• Operating Temperature Range: 0°C ~ 70°C
• Logic Series Compatibility: 74ALS and 74AS series devices

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: SN74ALS258AN (Texas Instruments) — identical part number designation with matching electrical and mechanical specifications.

Parametric Equivalents: SN74ALS257AN and SN74AS258N (Texas Instruments) — functionally equivalent 4 x 2:1 multiplexers with identical electrical performance and package specifications, differing only in base product number or logic series designation.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS258AN is the primary substitute for the DM74ALS258N. This part is manufactured by Texas Instruments with identical electrical specifications and package configuration. The SN74ALS258AN carries Active product status and ROHS3 compliance, providing long-term availability and regulatory alignment for new designs and production continuity.

SN74ALS257AN and SN74AS258N are parametric equivalents suitable for applications where the 4 x 2:1 multiplexer function and electrical performance are the primary selection criteria. Both parts maintain identical voltage supply ranges, output current specifications, and operating temperature ranges. The SN74AS258N operates within the 74AS logic series, which may exhibit different propagation delay characteristics compared to the 74ALS series, though electrical compatibility is maintained within the specified parameters.

All three substitute parts are currently in active production status with ROHS3 compliance and REACH unaffected designation, supporting regulatory requirements for modern manufacturing and end-of-life management.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS258AN be used as a direct replacement for DM74ALS258N?

A: Yes. The SN74ALS258AN is a direct manufacturer equivalent with identical electrical specifications, package type, and functional performance. Pin configuration, voltage supply requirements, and output current ratings are equivalent.

Q: What is the difference between SN74ALS257AN and SN74ALS258AN?

A: Both are 4 x 2:1 multiplexers with identical electrical performance and package specifications. The difference lies in the base product number designation (257 vs. 258), which reflects internal design variations that do not affect the specified electrical parameters or functional compatibility within the allowed parameter range.

Q: Can SN74AS258N replace DM74ALS258N?

A: Yes, within the specified electrical parameters. The SN74AS258N is a 74AS series device, while the original is 74ALS series. Both maintain the same voltage supply range (4.5V ~ 5.5V), output current specifications (2.6mA / 24mA), and operating temperature range (0°C ~ 70°C). The 74AS series may exhibit different propagation delay characteristics, but this does not affect compatibility based on the provided parameters.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts are available in 16-DIP (0.300", 7.62mm) through-hole packages, matching the original DM74ALS258N package specification.

Q: What is the product status significance?

A: The DM74ALS258N is obsolete, meaning onsemi no longer manufactures or supports this part. The substitute parts (SN74ALS258AN, SN74ALS257AN, SN74AS258N) are all in Active status, ensuring ongoing availability, technical support, and compliance with current regulatory standards.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.