SI8920AC-IP Equivalent & Substitute Parts

Part Overview

The SI8920AC-IP is an isolation IC manufactured by Skyworks Solutions Inc., designed for inverters, power supplies, and uninterruptible power supply (UPS) applications. This component features an 8-DIP Gull Wing surface mount package and operates as an isolation device within linear amplifier circuits.

The SI8920AC-IP carries a product status designation of "Not For New Designs," indicating that Skyworks Solutions Inc. has transitioned this component away from active development. For new circuit designs and ongoing production requirements, equivalent substitute parts with active product status are available and recommended for selection.

Substiute Parts

SI8920AC-IP

Skyworks Solutions Inc.In Stock: 2146SI8920AC-IP Datasheet

Current PartRFQ

SI8921AD-IS4

Skyworks Solutions Inc.In Stock: 2768SI8921AD-IS4 Datasheet

MFR RecommendedRFQ

SI8921BD-IS4

Skyworks Solutions Inc.In Stock: 1385SI8921BD-IS4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI8920AC-IP is determined by functional equivalence within the isolation IC category for inverter, power supply, and UPS applications. The substitute parts SI8921AD-IS4 and SI8921BD-IS4 maintain the following critical parameters:

• Manufacturer: Skyworks Solutions Inc. (same manufacturer ensures design continuity)
• Category: Linear, Amplifiers (identical functional classification)
• Type: Isolation (same isolation IC functionality)
• Applications: Inverters, Power Supplies, UPS (identical application scope)
• Mounting Type: Surface Mount (compatible assembly process)
• RoHS Status: ROHS3 Compliant (equivalent environmental compliance)
• REACH Status: REACH Unaffected (equivalent regulatory status)
• ECCN: EAR99 (equivalent export classification)

The primary difference between the main part and substitutes is the package configuration: the SI8920AC-IP uses an 8-DIP Gull Wing package, while the SI8921AD-IS4 and SI8921BD-IS4 use an 8-SOIC package. Both package types are surface mount configurations suitable for automated assembly.

Parameter Comparison

Engineering Selection Recommendations

The SI8921AD-IS4 and SI8921BD-IS4 are functionally equivalent isolation ICs for inverter, power supply, and UPS applications. Both substitute parts carry an "Active" product status, indicating ongoing manufacturer support and availability for new designs.

Selection between the SI8921AD-IS4 and SI8921BD-IS4 should be based on circuit design requirements and PCB layout constraints. Both parts are manufactured by Skyworks Solutions Inc. and maintain identical functional specifications for isolation applications. The SI8921AD-IS4 and SI8921BD-IS4 feature improved moisture sensitivity levels (2A, 4 Weeks) compared to the SI8920AC-IP (3, 168 Hours), providing enhanced reliability in humid storage and operational environments.

For designs currently using the SI8920AC-IP, transition to either SI8921AD-IS4 or SI8921BD-IS4 requires PCB layout modification to accommodate the 8-SOIC package footprint in place of the 8-DIP Gull Wing package. Both substitute parts maintain full compliance with ROHS3 and REACH regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SI8921AD-IS4 or SI8921BD-IS4 directly replace the SI8920AC-IP without PCB modification?

A: No. The SI8920AC-IP uses an 8-DIP Gull Wing package, while the SI8921AD-IS4 and SI8921BD-IS4 use an 8-SOIC package. PCB layout and footprint modifications are required for physical mounting. However, the functional isolation characteristics are equivalent.

Q: What is the difference between SI8921AD-IS4 and SI8921BD-IS4?

A: Both parts are functionally equivalent isolation ICs with identical package, mounting type, and application scope. The primary distinction is the HTSUS classification code (8542.39.0001 for SI8921AD-IS4 versus 8542.33.0001 for SI8921BD-IS4), which reflects tariff classification differences and does not affect electrical performance or compatibility.

Q: Why is the SI8920AC-IP marked "Not For New Designs"?

A: This designation indicates that Skyworks Solutions Inc. has concluded active development and support for this component. Existing inventory remains available, but new circuit designs should utilize the active substitute parts SI8921AD-IS4 or SI8921BD-IS4 to ensure long-term availability and manufacturer support.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes. Both SI8921AD-IS4 and SI8921BD-IS4 are ROHS3 Compliant and REACH Unaffected, matching the compliance status of the SI8920AC-IP.

Q: What is the moisture sensitivity difference between the main part and substitutes?

A: The SI8920AC-IP has MSL 3 (168 Hours), while SI8921AD-IS4 and SI8921BD-IS4 have MSL 2A (4 Weeks). Lower MSL ratings indicate better tolerance to moisture exposure during storage and handling, providing improved reliability in humid conditions.

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

A: Yes. SI8921AD-IS4 and SI8921BD-IS4 are functionally equivalent and can be used interchangeably from an electrical and mechanical standpoint. Component selection may be based on availability, inventory levels, or supply chain considerations.