SI8920AC-AP Equivalent & Substitute Parts

Part Overview

The SI8920AC-AP is an automotive-grade isolation IC designed for inverters, power supplies, and uninterruptible power supply (UPS) applications. Manufactured by Skyworks Solutions Inc., this component features an 8-DIP Gull Wing package configuration and meets AEC-Q100 automotive qualification standards.

The SI8920AC-AP carries a product status of "Not For New Designs," indicating that Skyworks Solutions Inc. has transitioned this part to end-of-life status. For new design implementations and ongoing production requirements, equivalent substitute parts with active product status are available within the same product family.

Substiute Parts

SI8920AC-AP

Skyworks Solutions Inc.In Stock: 1146SI8920AC-AP Datasheet

Current PartRFQ

SI8921AD-AS4

Skyworks Solutions Inc.In Stock: 1000SI8921AD-AS4 Datasheet

MFR RecommendedRFQ

SI8921BD-AS4

Skyworks Solutions Inc.In Stock: 1159SI8921BD-AS4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI8920AC-AP is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the same isolation IC functionality for inverter, power supply, and UPS applications.

Automotive Compliance: Both substitute parts retain AEC-Q100 automotive qualification, ensuring compliance with automotive industry reliability and quality standards.

Manufacturer Consistency: All substitute parts are manufactured by Skyworks Solutions Inc., maintaining design consistency and supply chain continuity.

Active Product Status: The substitute parts (SI8921AD-AS4 and SI8921BD-AS4) carry "Active" product status, making them suitable for new design implementations and long-term production support.

Package Compatibility Consideration: The SI8920AC-AP uses an 8-DIP Gull Wing package, while substitute parts use an 8-SOIC package. This represents a package form factor change that requires PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

For New Design Implementation: Select either SI8921AD-AS4 or SI8921BD-AS4. Both parts carry active product status and are supported for new design applications. Both maintain AEC-Q100 automotive qualification and are suitable for inverter, power supply, and UPS applications.

For Existing SI8920AC-AP Designs: The SI8920AC-AP remains available for legacy production support. However, transition planning to SI8921AD-AS4 or SI8921BD-AS4 is recommended due to the "Not For New Designs" status. PCB layout modification is required to accommodate the package form factor change from 8-DIP Gull Wing to 8-SOIC.

Moisture Sensitivity Consideration: The substitute parts (SI8921AD-AS4 and SI8921BD-AS4) feature MSL 2A (4 Weeks) compared to the SI8920AC-AP MSL 3 (168 Hours). This represents a more stringent moisture sensitivity requirement and affects storage and handling procedures.

Supply Chain Continuity: Both substitute parts maintain higher inventory levels (924 and 1113 units respectively) compared to the SI8920AC-AP (1098 units), supporting consistent availability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can SI8921AD-AS4 or SI8921BD-AS4 be used as direct replacements for SI8920AC-AP without PCB modification?

A: No. The SI8920AC-AP uses an 8-DIP Gull Wing package, while the substitute parts use an 8-SOIC package. PCB layout modification is required to accommodate the different package footprint and pin spacing.

Q: What is the difference between SI8921AD-AS4 and SI8921BD-AS4?

A: Both parts share identical electrical specifications, package configuration (8-SOIC), automotive grade, AEC-Q100 qualification, and application suitability. The designation difference (AD vs. BD) reflects internal Skyworks Solutions Inc. product line differentiation. Both are functionally equivalent for inverter, power supply, and UPS applications.

Q: Why does the SI8920AC-AP have "Not For New Designs" status?

A: This status indicates that Skyworks Solutions Inc. has transitioned the SI8920AC-AP to end-of-life. New design implementations should utilize the active substitute parts SI8921AD-AS4 or SI8921BD-AS4 to ensure long-term product support and availability.

Q: Are the substitute parts automotive-qualified?

A: Yes. Both SI8921AD-AS4 and SI8921BD-AS4 carry AEC-Q100 automotive qualification, meeting the same automotive industry reliability and quality standards as the SI8920AC-AP.

Q: What is the impact of the different Moisture Sensitivity Levels?

A: The SI8920AC-AP has MSL 3 (168 Hours), while the substitute parts have MSL 2A (4 Weeks). MSL 2A requires more stringent moisture control during storage and handling. Components must be stored in controlled humidity environments and have shorter shelf life after opening moisture barrier packaging.

Q: Can both substitute parts be used interchangeably in the same application?

A: Yes. SI8921AD-AS4 and SI8921BD-AS4 are functionally equivalent for inverter, power supply, and UPS applications. Both maintain identical electrical specifications, automotive qualification, and package configuration.