DM74ALS251MX Equivalent & Substitute Parts

Part Overview

The DM74ALS251MX is a 1 x 8:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The DM74ALS251MX operates with a single supply voltage between 4.5V and 5.5V and is suitable for applications requiring 8-to-1 data selection in the 0°C to 70°C operating temperature range.

Substiute Parts

DM74ALS251MX

onsemiIn Stock: 3666DM74ALS251MX Datasheet

Current PartRFQ

SN74ALS251D

Texas InstrumentsIn Stock: 1640SN74ALS251D Datasheet

DirectRFQ

SN74ALS151DR

Texas InstrumentsIn Stock: 2752SN74ALS151DR Datasheet

Parametric EquivalentRFQ

SN74ALS251DR

Texas InstrumentsIn Stock: 932SN74ALS251DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS251MX are qualified based on the following electrical and mechanical parameters:

• Circuit configuration: 1 x 8:1 multiplexer function
• Package type: 16-SOIC surface mount
• Package dimensions: 0.154" width (3.90mm)
• Voltage supply range: 4.5V ~ 5.5V
• Output current specifications: 2.6mA (high), 24mA (low)
• Operating temperature range: 0°C ~ 70°C
• Series classification: 74ALS logic family
• Moisture sensitivity level: 1 (Unlimited)

All substitute parts maintain identical electrical performance and physical compatibility with the original DM74ALS251MX, differing only in manufacturer, product status, packaging format, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS251DR (Texas Instruments) is the primary recommended substitute. This part maintains active product status, carries ROHS3 compliance certification, and is available in Tape & Reel packaging suitable for automated assembly. The SN74ALS251DR provides the longest product lifecycle support among available alternatives.

SN74ALS151DR (Texas Instruments) is a parametric equivalent alternative with identical electrical and mechanical specifications. This part also maintains active status and ROHS3 compliance. Selection between SN74ALS251DR and SN74ALS151DR depends on base product number availability and supply chain considerations, as both are functionally interchangeable.

SN74ALS251D (Texas Instruments) is available as a secondary option with Last Time Buy status, packaged in Tube format. This part is suitable for lower-volume applications or legacy system support where Tape & Reel packaging is not required.

All three substitute parts are REACH Unaffected and classified under ECCN EAR99, matching the compliance profile of the original DM74ALS251MX.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS251DR be used as a direct replacement for DM74ALS251MX?

A: Yes. The SN74ALS251DR is electrically and mechanically compatible with the DM74ALS251MX. Both parts share identical circuit configuration (1 x 8:1 multiplexer), 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).

Q: What is the difference between SN74ALS251DR and SN74ALS151DR?

A: Both parts are parametric equivalents with identical electrical performance and package specifications. The primary difference is the base product number designation (74ALS251 versus 74ALS151). Both are manufactured by Texas Instruments, maintain active product status, and carry ROHS3 compliance. Selection depends on supply availability and design documentation requirements.

Q: Why is the DM74ALS251MX listed as obsolete?

A: The DM74ALS251MX has reached end-of-life status with onsemi. Texas Instruments continues to manufacture functionally equivalent parts under the 74ALS251 and 74ALS151 designations, ensuring design continuity and supply availability.

Q: Does packaging format affect electrical performance?

A: No. The Tape & Reel (TR), Tube, and bulk packaging formats contain identical die and electrical specifications. Packaging format selection is determined by assembly process requirements and order quantity. Tape & Reel is standard for automated surface mount assembly, while Tube packaging is suitable for manual or lower-volume applications.

Q: Are all substitute parts RoHS compliant?

A: The Texas Instruments substitutes (SN74ALS251D, SN74ALS151DR, SN74ALS251DR) are ROHS3 compliant. The original DM74ALS251MX RoHS status is not specified in the provided data. All parts are REACH Unaffected.