DM74ALS257N Equivalent & Substitute Parts

Part Overview

The DM74ALS257N 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 DM74ALS257N performs data selection and routing functions in digital logic applications, with electrical characteristics suitable for standard TTL-compatible systems operating at 4.5V to 5.5V.

Substiute Parts

DM74ALS257N

onsemiIn Stock: 4080DM74ALS257N Datasheet

Current PartRFQ

SN74ALS257AN

Texas InstrumentsIn Stock: 2664SN74ALS257AN Datasheet

DirectRFQ

SN74ALS258AN

Texas InstrumentsIn Stock: 5782SN74ALS258AN Datasheet

Parametric EquivalentRFQ

SN74AS258N

Texas InstrumentsIn Stock: 2237SN74AS258N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS257N is determined by strict equivalence in 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
• Output current specifications: 2.6mA (high), 24mA (low)
• Operating temperature range: 0°C ~ 70°C
• Independent circuits: 1

All substitute parts listed maintain identical electrical performance and physical compatibility with the original DM74ALS257N. Substitutes are grouped by manufacturer and product status to facilitate procurement decisions.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS257AN (Texas Instruments) is the primary direct equivalent. This part maintains identical electrical and mechanical specifications to the DM74ALS257N while offering active product status and ROHS3 compliance, providing long-term availability and regulatory alignment.

SN74ALS258AN (Texas Instruments) is a parametric equivalent offering identical electrical performance and package configuration. The base product number differs (74ALS258 vs. 74ALS257), but all critical electrical and mechanical parameters remain equivalent. This part is active and ROHS3 compliant.

SN74AS258N (Texas Instruments) is a parametric equivalent from the 74AS logic series. While maintaining identical electrical specifications and package configuration, this part operates within the faster 74AS timing characteristics. This part is active and ROHS3 compliant, suitable for applications where timing performance is not a constraint.

All three substitute parts are manufactured by Texas Instruments with active product status, ensuring procurement availability and regulatory compliance superior to the obsolete DM74ALS257N.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS257AN be used as a direct replacement for DM74ALS257N?

A: Yes. The SN74ALS257AN is a direct equivalent with identical circuit configuration (4 x 2:1 multiplexer), package type (16-DIP), voltage supply range (4.5V ~ 5.5V), output current specifications (2.6mA, 24mA), and operating temperature range (0°C ~ 70°C). Both parts are functionally and physically interchangeable.

Q: What is the difference between SN74ALS257AN and SN74ALS258AN?

A: Both parts are parametric equivalents with identical electrical performance and package configuration. The primary difference is the base product number designation (74ALS257 vs. 74ALS258). All critical electrical and mechanical parameters remain equivalent, making them interchangeable in circuit applications.

Q: Can SN74AS258N replace DM74ALS257N?

A: Yes. The SN74AS258N maintains identical electrical specifications and package configuration. The 74AS series operates with faster timing characteristics than the 74ALS series, but all voltage supply, output current, and operating temperature parameters are equivalent. This part is suitable for direct substitution.

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, identical to the DM74ALS257N. No PCB layout modifications are required for substitution.

Q: What compliance certifications do the substitute parts carry?

A: All three substitute parts (SN74ALS257AN, SN74ALS258AN, SN74AS258N) are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.