DM74LS158N Equivalent & Substitute Parts

Part Overview

The DM74LS158N 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 part operates with a single supply voltage and is suitable for applications requiring multiplexing of multiple data lines in digital logic circuits.

Substiute Parts

DM74LS158N

onsemiIn Stock: 5148DM74LS158N Datasheet

Current PartRFQ

SN74ALS158N

Texas InstrumentsIn Stock: 2356SN74ALS158N Datasheet

SimilarRFQ

SN74LS157N

Texas InstrumentsIn Stock: 13698SN74LS157N Datasheet

Parametric EquivalentRFQ

SN74LS158N

Texas InstrumentsIn Stock: 2430SN74LS158N Datasheet

Parametric EquivalentRFQ

SN74LS298N

onsemiIn Stock: 20322SN74LS298N Datasheet

Parametric EquivalentRFQ

SN74LS399N

Texas InstrumentsIn Stock: 2735SN74LS399N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS158N is determined by the following critical parameters:

• Circuit configuration (4 x 2:1 multiplexer)
• Independent circuits count (1)
• Output current specifications (400µA high, 8mA low)
• Package type (16-DIP through-hole)
• Voltage supply range compatibility
• Operating temperature range
• Mounting type (through-hole)

Substitute parts must maintain identical or compatible specifications across all these parameters. The following parts meet these substitution criteria:

• SN74LS157N - Parametric equivalent with identical electrical specifications
• SN74LS158N - Parametric equivalent with identical electrical specifications
• SN74ALS158N - Similar equivalent with extended voltage supply range (4.5V ~ 5.5V)
• SN74LS298N - Parametric equivalent with identical electrical specifications
• SN74LS399N - Parametric equivalent with identical electrical specifications

Parameter Comparison

Engineering Selection Recommendations

For applications requiring replacement of the obsolete DM74LS158N, the following selection criteria apply:

Active Product Status Priority: SN74LS157N, SN74LS158N, SN74ALS158N, and SN74LS399N are all active products with current manufacturing support. These are preferred over obsolete alternatives for new designs and ongoing procurement.

RoHS Compliance: SN74LS157N, SN74LS158N, SN74ALS158N, and SN74LS399N are ROHS3 compliant. SN74LS298N is RoHS non-compliant and should be avoided in applications requiring RoHS compliance.

Voltage Supply Range: SN74ALS158N offers an extended voltage supply range (4.5V ~ 5.5V) compared to the standard 74LS series (4.75V ~ 5.25V). This provides greater tolerance for supply voltage variations.

Inventory Availability: SN74LS157N offers the highest inventory availability at 13,652 pieces, followed by SN74LS298N at 20,300 pieces. All active substitutes maintain adequate stock levels for procurement.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS158N be used as a direct replacement for DM74LS158N?

A: Yes. SN74ALS158N is a direct functional equivalent with identical circuit configuration, output current specifications, operating temperature range, and package type. The extended voltage supply range (4.5V ~ 5.5V versus 4.75V ~ 5.25V) provides additional design flexibility.

Q: What is the difference between SN74LS157N and SN74LS158N?

A: Both parts are parametric equivalents with identical electrical specifications, output current ratings, voltage supply ranges, operating temperature ranges, and package types. Selection between these parts depends on design requirements and availability.

Q: Is SN74LS298N suitable for RoHS-compliant applications?

A: No. SN74LS298N is RoHS non-compliant. For applications requiring RoHS compliance, use SN74LS157N, SN74LS158N, SN74ALS158N, or SN74LS399N.

Q: Are all substitute parts available in the same 16-DIP package?

A: Yes. All substitute parts are packaged in 16-DIP (0.300", 7.62mm) through-hole configuration, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Which substitute part has the best availability?

A: SN74LS298N has the highest inventory at 20,300 pieces. However, for active product status and RoHS compliance, SN74LS157N is recommended with 13,652 pieces in stock.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design operates within the specified voltage supply and temperature ranges. All substitute parts maintain identical circuit configuration, output current specifications, and package dimensions.