CD74AC251MG4 Equivalent & Substitute Parts

Part Overview

The CD74AC251MG4 is a 1 x 8:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs. The CD74AC251 series provides single-supply multiplexing functionality across a wide operating temperature range and voltage specification window.

Substiute Parts

CD74AC251MG4

Texas InstrumentsIn Stock: 963CD74AC251MG4 Datasheet

Current PartRFQ

CD74AC251M

Texas InstrumentsIn Stock: 1978CD74AC251M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74AC251MG4 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: 1 x 8:1 multiplexer topology
• Output current capability: 75mA high and low
• Voltage supply range: 1.5V ~ 5.5V single supply
• Operating temperature range: -55°C ~ 125°C
• Package type: 16-SOIC surface mount
• Base product number: 74AC251

The CD74AC251M qualifies as a direct substitute based on identical electrical specifications and package footprint. The primary difference is packaging format (tube versus tape and reel), which does not affect electrical or mechanical compatibility in the 16-SOIC form factor.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC251M is the direct manufacturer-recommended substitute for the CD74AC251MG4. Both parts maintain identical electrical performance specifications and are manufactured by Texas Instruments under the same base product number (74AC251). Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Selection between these parts should be based on packaging availability and procurement requirements. The CD74AC251MG4 is supplied in tape and reel format, while the CD74AC251M is supplied in tube packaging. The 16-SOIC footprint remains constant across both variants, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC251M be used as a direct replacement for the CD74AC251MG4 on existing PCBs?

A: Yes. Both parts use the 16-SOIC surface mount package with identical pin configuration and electrical specifications. No PCB layout changes are required.

Q: What is the difference between CD74AC251MG4 and CD74AC251M?

A: The primary difference is packaging format. The CD74AC251MG4 is supplied in tape and reel format (indicated by the "G4" suffix), while the CD74AC251M is supplied in tube format. Electrical performance and package footprint are identical.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts carry identical RoHS3 compliance status and REACH unaffected designation. They meet the same regulatory requirements for use in electronic assemblies.

Q: What are the critical parameters for substitution in the 74AC251 series?

A: Substitution is valid when the following parameters remain constant: 1 x 8:1 circuit configuration, 75mA output current capability, 1.5V ~ 5.5V supply voltage range, -55°C ~ 125°C operating temperature, and 16-SOIC package footprint.

Q: Can parts from other manufacturers substitute for the CD74AC251MG4?

A: Substitution with non-Texas Instruments parts is outside the scope of this manufacturer-recommended equivalency list. Cross-manufacturer substitution requires independent verification of electrical and mechanical compatibility.