SI86S622EC-AS Digital Isolator Equivalent & Substitute Parts

Part Overview

The SI86S622EC-AS is a general-purpose digital isolator manufactured by Skyworks Solutions Inc., designed for applications requiring galvanic isolation in digital signal transmission. This 2-channel, unidirectional isolator operates at 3750Vrms isolation voltage with a maximum data rate of 150Mbps and features capacitive coupling technology. The device is qualified to AEC-Q100 automotive standards and maintains active product status with 895 units currently in stock.

Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and optimize component availability across manufacturing environments while maintaining electrical and mechanical compatibility.

Substiute Parts

SI86S622EC-AS

Skyworks Solutions Inc.In Stock: 1005SI86S622EC-AS Datasheet

Current PartRFQ

SI86S621BC-IS

Skyworks Solutions Inc.In Stock: 1382SI86S621BC-IS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI86S622EC-AS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Isolation voltage: 3750Vrms
• Number of channels: 2
• Channel configuration: Unidirectional
• Data rate: 150Mbps
• Common Mode Transient Immunity: 100kV/µs minimum
• Propagation delay specifications: 13.5ns maximum (both directions)
• Pulse width distortion: 2.5ns maximum
• Supply voltage range: 2.25V ~ 5.5V
• Operating temperature range: -40°C ~ 125°C
• Package type: 8-SOIC (0.154", 3.90mm Width)
• Technology: Capacitive Coupling
• Mounting type: Surface Mount

The SI86S621BC-IS qualifies as a parametric equivalent because it maintains identical electrical specifications, mechanical dimensions, and thermal operating characteristics. Both devices belong to the Si86S62x series and share the same base technology platform.

Parameter Comparison

Engineering Selection Recommendations

Both the SI86S622EC-AS and SI86S621BC-IS are active products from Skyworks Solutions Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on the following engineering criteria:

Supply Chain Considerations: The SI86S621BC-IS maintains higher current inventory (1330 units) compared to the SI86S622EC-AS (895 units), providing greater availability for high-volume production requirements.

Compliance and Qualification: The SI86S622EC-AS carries explicit AEC-Q100 automotive qualification, making it the preferred choice for automotive-grade applications. The SI86S621BC-IS does not list automotive qualification in the provided specifications.

Packaging and Handling: Both devices utilize identical 8-SOIC packaging with 0.154" width and 3.90mm body dimensions, ensuring mechanical interchangeability on PCB layouts. Both maintain MSL 2 moisture sensitivity classification with 1-year floor life.

Environmental Performance: Both parts operate across the full -40°C to 125°C temperature range, supporting industrial and automotive temperature profiles.

For applications requiring automotive qualification, the SI86S622EC-AS is the specified choice. For general-purpose applications where automotive qualification is not required, the SI86S621BC-IS provides equivalent electrical performance with superior inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SI86S621BC-IS be used as a direct replacement for SI86S622EC-AS in automotive applications?

A: The SI86S621BC-IS provides identical electrical and mechanical specifications. However, the SI86S622EC-AS carries explicit AEC-Q100 automotive qualification. For automotive applications requiring qualification documentation, the SI86S622EC-AS is the specified part. For non-automotive applications, SI86S621BC-IS is electrically equivalent.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the SI86S622EC-AS and SI86S621BC-IS use 8-SOIC packaging with 0.154" width and 3.90mm body dimensions. PCB footprints and land patterns are identical, enabling direct mechanical substitution.

Q: What is the significance of the different part number suffixes (EC-AS vs. BC-IS)?

A: The suffixes indicate different manufacturing batches, temperature grades, or packaging configurations within the Si86S62x series. Both parts maintain identical electrical specifications and operating temperature ranges (-40°C to 125°C). The suffix differences do not affect functional compatibility.

Q: Do both parts support the same isolation voltage and data rate?

A: Yes. Both the SI86S622EC-AS and SI86S621BC-IS operate at 3750Vrms isolation voltage with 150Mbps maximum data rate, 100kV/µs common mode transient immunity, and 13.5ns propagation delay specifications.

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

A: Both parts are classified as MSL 2 with a 1-year floor life. This classification applies to both the SI86S622EC-AS and SI86S621BC-IS, requiring identical handling and storage protocols.

Q: Which part should be selected for new designs?

A: For automotive applications, select SI86S622EC-AS due to AEC-Q100 qualification. For general-purpose applications, either part is suitable; SI86S621BC-IS offers higher inventory availability. Both parts are active products with long-term support from Skyworks Solutions Inc.