SKY85405-21 Equivalent & Substitute Parts

Part Overview

The SKY85405-21 is an RF Front End IC manufactured by Skyworks Solutions Inc. This component is classified as Last Time Buy, indicating it is no longer in active production. The part is available with 42,710 pieces in new original stock. Due to its Last Time Buy status, identifying qualified substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

SKY85405-21

Skyworks Solutions Inc.In Stock: 42804SKY85405-21 Datasheet

Current PartRFQ

SKY85405-11

Skyworks Solutions Inc.In Stock: 95118SKY85405-11 Datasheet

MFR RecommendedRFQ

SKY85405-211

Skyworks Solutions Inc.In Stock: 3045SKY85405-211 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for SKY85405-21 is based on the following criteria derived from the provided data:

• Base product family alignment (SKY85405 series)
• RF application compatibility (802.11ac, 5GHz band operation)
• Mounting type (Surface Mount)
• Moisture sensitivity level (MSL 3, 168 Hours)
• Manufacturer consistency (Skyworks Solutions Inc.)

The two qualified substitutes are SKY85405-11 and SKY85405-211, both active products within the same base product family. These parts maintain functional equivalence within the RF Front End category while offering different electrical specifications and package configurations.

Parameter Comparison

Engineering Selection Recommendations

Selection between SKY85405-11 and SKY85405-211 depends on specific application requirements:

SKY85405-11 is recommended for applications requiring 5V supply voltage operation with 20-QFN package footprint. This part has the highest inventory availability (95,100 pieces) and active product status, providing long-term supply security.

SKY85405-211 is recommended for applications requiring 3.3V supply voltage operation with compact 9-MCM module packaging. This part supports the extended frequency range of 5.15GHz to 5.93GHz and includes specified gain (31dB) and P1dB (28dB) parameters.

Both substitutes maintain MSL 3 classification and surface mount compatibility. The selection must account for PCB layout constraints, power supply architecture, and frequency band requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can SKY85405-11 and SKY85405-211 be used interchangeably with SKY85405-21?

A: Both parts are qualified substitutes within the SKY85405 base product family. However, they differ in supply voltage (5V vs. 3.3V), package type (20-QFN vs. 9-MCM), and frequency specifications. Direct substitution requires verification of PCB design compatibility and power supply requirements.

Q: What is the difference in package size between the two substitutes?

A: SKY85405-11 uses a 20-VFQFN Exposed Pad package (4x4mm), while SKY85405-211 uses a 9-MCM module package (1.6x1.6mm). The SKY85405-211 offers a significantly smaller footprint for space-constrained applications.

Q: Are both substitutes suitable for 802.11ac applications?

A: Yes, both SKY85405-11 and SKY85405-211 are specified for 802.11ac RF applications. SKY85405-211 additionally supports WLAN operation across the 5.15GHz to 5.93GHz frequency range.

Q: What is the moisture sensitivity level for these parts?

A: Both substitute parts are classified as MSL 3 with a 168-hour floor life rating. Standard moisture control procedures for surface mount assembly apply.

Q: Which substitute has better inventory availability?

A: SKY85405-11 has the highest inventory level at 95,100 pieces, compared to 2,980 pieces for SKY85405-211. For high-volume production requirements, SKY85405-11 provides superior supply continuity.