MAX951C/D Equivalent & Substitute Parts

Part Overview

The MAX951C/D is an Amplifier, Comparator, and Reference IC designed for Smart Card applications, supplied as a die in surface mount configuration. This part is classified as Obsolete and no longer in active production. The original die package format limits integration options in modern manufacturing environments. Identifying equivalent substitute parts ensures design continuity and maintains access to functionally compatible components with active product status and improved availability.

Substiute Parts

MAX951C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 874MAX951C/D Datasheet

Current PartRFQ

MAX951ESA+

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX951C/D is determined by the following critical parameters:

Functional Equivalence: Both the main part and substitute must share the same base product number (MAX951) and identical functional classification as Amplifier, Comparator, and Reference IC for Smart Card applications.

Compliance Alignment: Substitute parts must maintain ROHS3 compliance and REACH unaffected status to ensure regulatory continuity in manufacturing and deployment.

Mounting and Integration: The substitute must support surface mount technology and be compatible with Smart Card circuit integration requirements.

Packaging Transition: The MAX951ESA+ provides the same functional capability in an industry-standard 8-SOIC package format, enabling direct functional substitution while improving manufacturing accessibility and component availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MAX951ESA+ is the designated manufacturer-recommended equivalent for MAX951C/D applications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring no regulatory barriers to substitution in Smart Card circuit designs.

Product Status Advantage: The MAX951ESA+ holds Active product status with established long-term availability, whereas the MAX951C/D is Obsolete. Selection of the active substitute ensures sustained component supply for production and field support.

Packaging Consideration: The transition from die format to 8-SOIC package requires circuit board redesign and assembly process modification. This packaging change is necessary to access the active, supported product variant while maintaining functional equivalence.

Inventory and Lead Time: The MAX951ESA+ demonstrates superior inventory levels (2200 units) compared to the obsolete die variant, supporting reliable procurement for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can MAX951ESA+ directly replace MAX951C/D in existing designs?

A: Functional replacement is direct; however, circuit board layout and assembly processes must be modified to accommodate the 8-SOIC package format instead of the die configuration.

Q: What is the primary reason for substitution?

A: The MAX951C/D is classified as Obsolete. The MAX951ESA+ is the active equivalent offering the same amplifier, comparator, and reference functionality with sustained manufacturer support and improved availability.

Q: Are there compliance differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings.

Q: Does the package change affect electrical performance?

A: Both parts share the same base product number (MAX951) and functional classification. Electrical performance is determined by the die itself; the 8-SOIC package is a standard industry format for this device class.

Q: What is the inventory advantage of the substitute?

A: The MAX951ESA+ has 2200 units in stock compared to 833 units for the obsolete die variant, providing improved lead time and procurement reliability.

Q: Is the 8-SOIC package suitable for Smart Card applications?

A: Yes. The MAX951ESA+ is specified for Smart Card applications in the 8-SOIC package format, confirming suitability for this application class.