SI86S642FE-AS2 Equivalent & Substitute Parts

Part Overview

The SI86S642FE-AS2 is a 6.0 KVRMS SPI Digital Isolator manufactured by Skyworks Solutions Inc. This component provides galvanic isolation for SPI communication interfaces with 4 unidirectional channels, operating at 150 Mbps data rate and 150 kV/µs common mode transient immunity. The device is qualified to AEC-Q100 automotive standards and operates across the temperature range of -40°C to 125°C. Identifying equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across manufacturing cycles.

Substiute Parts

SI86S642FE-AS2

Skyworks Solutions Inc.In Stock: 938SI86S642FE-AS2 Datasheet

Current PartRFQ

SI86S642BE-AS2

Skyworks Solutions Inc.In Stock: 1223SI86S642BE-AS2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI86S642FE-AS2 is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 6000 Vrms (non-negotiable for safety-critical applications)
• Channel Configuration: 4 unidirectional channels with 2 inputs per side
• Data Rate: 150 Mbps minimum
• Common Mode Transient Immunity: 150 kV/µs minimum
• Supply Voltage Range: 2.25V ~ 5.5V
• Operating Temperature Range: -40°C ~ 125°C
• Package Type: 16-SOIC (0.295", 7.50mm Width)
• Automotive Grade: AEC-Q100 qualification required
• Technology: Capacitive Coupling isolation method

Substitute parts must match all parameters listed above. Deviations in any of these specifications disqualify a component from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The SI86S642BE-AS2 is a direct parametric equivalent to the SI86S642FE-AS2. Both components are manufactured by Skyworks Solutions Inc., share identical electrical specifications, and are qualified to AEC-Q100 automotive standards. Both devices maintain Active product status, ensuring long-term availability and manufacturing support.

Selection between these two parts should be based on inventory availability and supply chain logistics. The SI86S642BE-AS2 currently has 1155 pieces in stock compared to 874 pieces for the SI86S642FE-AS2. Both components are supplied in Tube packaging and comply with ROHS3 environmental standards.

No technical performance differentiation exists between these parts. PCB layout, schematic integration, and functional performance remain identical when substituting one for the other.

Frequently Asked Questions (FAQ)

Q: Can the SI86S642BE-AS2 be used as a direct replacement for SI86S642FE-AS2 in automotive applications?

A: Yes. Both parts are AEC-Q100 qualified, share identical electrical and thermal specifications, and are packaged in the same 16-SOIC form factor. Direct substitution is supported without design modification.

Q: Are there any differences in isolation voltage or CMTI performance between these parts?

A: No. Both the SI86S642FE-AS2 and SI86S642BE-AS2 provide 6000 Vrms isolation voltage and 150 kV/µs common mode transient immunity. Electrical performance is identical.

Q: Do both parts support the same supply voltage range?

A: Yes. Both components operate across 2.25V to 5.5V supply voltage range and maintain identical propagation delay, pulse width distortion, and rise/fall time specifications.

Q: What is the significance of the different part number suffixes (FE vs. BE)?

A: The suffix designates internal device configuration or manufacturing process variant. However, all electrical, thermal, and mechanical parameters remain equivalent for substitution purposes.

Q: Are moisture sensitivity levels identical for both parts?

A: Yes. Both the SI86S642FE-AS2 and SI86S642BE-AS2 have MSL 3 rating with 168-hour floor life, requiring identical handling and storage protocols.

Q: Can these parts be mixed in the same production batch?

A: Yes. Since both parts are parametrically equivalent and share identical package specifications, they can be used interchangeably within the same design without functional or reliability impact.