MAX951ESA Equivalent & Substitute Parts

Part Overview

The MAX951ESA is a linear amplifier, comparator, and reference IC manufactured by Analog Devices Inc./Maxim Integrated, designed for smart card applications. This component integrates multiple analog functions in a compact 8-SOIC surface mount package. The MAX951ESA is classified as obsolete, which necessitates identification of active equivalent parts to ensure continued design support and procurement availability for new production runs and legacy system maintenance.

Substiute Parts

MAX951ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 2358MAX951ESA Datasheet

Current PartRFQ

MAX951ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2250MAX951ESA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX951ESA is determined by strict alignment of the following parameters:

• Base Product Number: Both parts share MAX951, confirming identical die and functional specification
• Package / Case: Both use 8-SOIC (0.154", 3.90mm Width), ensuring mechanical and electrical compatibility
• Mounting Type: Both are Surface Mount, compatible with identical PCB assembly processes
• Type Classification: Both are Amplifier, Comparator, Reference ICs
• Application Domain: Both are specified for Smart Card applications
• Compliance Standards: Both meet ROHS3 Compliant and REACH Unaffected requirements
• Moisture Sensitivity Level: Both rated MSL 1 (Unlimited), indicating identical handling and storage requirements

The primary distinction between the main part and its substitute is product status and packaging format, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

MAX951ESA+ as Direct Substitute

The MAX951ESA+ is the active production equivalent of the MAX951ESA. Both parts share identical electrical specifications, package geometry, and compliance certifications. The MAX951ESA+ differs only in product status (Active vs. Obsolete) and packaging format (Tube vs. Standard).

For new designs and production procurement, the MAX951ESA+ is the appropriate selection due to its active product status and guaranteed long-term availability. The identical 8-SOIC package ensures direct PCB compatibility without layout modifications. Both parts maintain ROHS3 Compliant and REACH Unaffected certifications, satisfying regulatory requirements for industrial and consumer applications.

For legacy system repairs or limited-quantity requirements where the original MAX951ESA remains available, either part is functionally interchangeable. The selection between them should be based on procurement lead time, inventory availability, and packaging requirements (Tube format for MAX951ESA+).

Frequently Asked Questions (FAQ)

Q: Can MAX951ESA+ replace MAX951ESA in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The MAX951ESA+ uses the same 8-SOIC package, mounting type, and functional specification. No PCB modifications or design changes are required.

Q: What is the difference between MAX951ESA and MAX951ESA+?

A: The primary differences are product status and packaging format. MAX951ESA is obsolete; MAX951ESA+ is active production. MAX951ESA+ is supplied in Tube packaging, while MAX951ESA uses standard packaging. All electrical and compliance parameters are identical.

Q: Why is MAX951ESA classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued standard production. The MAX951ESA+ represents the active continuation of this product line. For new designs, MAX951ESA+ should be specified.

Q: Are there any compatibility concerns when substituting MAX951ESA+ for MAX951ESA?

A: No compatibility concerns exist. Both parts share identical package dimensions (8-SOIC, 0.154" width, 3.90mm), mounting type (Surface Mount), and electrical specifications. Assembly processes, test procedures, and handling requirements are identical.

Q: What does MSL 1 (Unlimited) mean for these parts?

A: MSL 1 indicates the lowest moisture sensitivity level. These parts have unlimited shelf life under standard storage conditions and do not require special moisture-controlled packaging or baking procedures prior to assembly.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both MAX951ESA and MAX951ESA+ are ROHS3 Compliant and REACH Unaffected, meeting environmental and regulatory requirements for industrial, commercial, and consumer applications.

Q: Can I use MAX951ESA+ in smart card applications?

A: Yes. Both parts are specified for smart card applications. The MAX951ESA+ maintains identical functional performance and is suitable for all smart card circuit designs originally using MAX951ESA.