DM74ALS157MX Equivalent & Substitute Parts

Part Overview

The DM74ALS157MX is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The DM74ALS157MX operates from a single 4.5V to 5.5V supply and is suitable for applications requiring multiplexing functionality in standard TTL logic environments.

Substiute Parts

DM74ALS157MX

onsemiIn Stock: 958DM74ALS157MX Datasheet

Current PartRFQ

SN74ALS157AD

Texas InstrumentsIn Stock: 2282SN74ALS157AD Datasheet

DirectRFQ

SN74ALS157ADR

Texas InstrumentsIn Stock: 2775SN74ALS157ADR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS157MX are qualified based on strict electrical and mechanical parameter matching within the 74ALS logic family. The following parameters determine substitution eligibility:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-SOIC surface mount form factor
• Voltage supply range: 4.5V ~ 5.5V single supply operation
• Output current specifications: 400µA (high), 8mA (low)
• Operating temperature range: 0°C ~ 70°C
• Series classification: 74ALS logic family

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the original DM74ALS157MX specification.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS157ADR manufactured by Texas Instruments is the primary recommended substitute for the obsolete DM74ALS157MX. This part maintains active product status and carries ROHS3 compliance certification, making it suitable for current production and long-term availability. The SN74ALS157ADR is supplied in Tape & Reel packaging format, standard for automated assembly operations.

The SN74ALS157AD from Texas Instruments serves as an alternative substitute with Last Time Buy status. This part is available in Tube packaging and provides identical electrical and mechanical specifications. Selection between SN74ALS157ADR and SN74ALS157AD depends on packaging requirements and procurement volume.

Both Texas Instruments substitutes are fully compatible with the DM74ALS157MX at the electrical and mechanical interface level, with no design modifications required for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS157AD and SN74ALS157ADR be used interchangeably with the DM74ALS157MX?

A: Yes. Both parts are electrically and mechanically equivalent. The difference between SN74ALS157AD and SN74ALS157ADR is packaging format only: Tube versus Tape & Reel. Selection depends on assembly method and procurement requirements.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for manual handling and smaller volume orders. Tape & Reel packaging is designed for automated pick-and-place assembly equipment and is standard for high-volume production. Both formats contain identical components.

Q: Why is the DM74ALS157MX listed as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Substitute parts from active manufacturers ensure continued availability and support for designs requiring 4 x 2:1 multiplexer functionality in the 74ALS logic family.

Q: Are there any compliance differences between the substitute parts?

A: The Texas Instruments substitutes (SN74ALS157AD and SN74ALS157ADR) carry ROHS3 compliance certification. Both parts maintain REACH Unaffected status and MSL 1 rating, consistent with the original DM74ALS157MX specification.

Q: Can I mix packaging formats in the same production run?

A: Yes. SN74ALS157AD (Tube) and SN74ALS157ADR (Tape & Reel) are identical components and can be used together. Packaging format selection is a procurement and assembly logistics decision, not a technical compatibility issue.