SI8622BT-AS Equivalent & Substitute Parts

Part Overview

The SI8622BT-AS is a general purpose digital isolator manufactured by Skyworks Solutions Inc., designed for automotive applications with 5000Vrms isolation capability. This 2-channel capacitive coupling isolator operates at 150Mbps data rate with 60kV/µs common mode transient immunity and is qualified to AEC-Q100 automotive standards. The device is packaged in 16-SOIC (0.295", 7.50mm Width) surface mount configuration and operates across the -40°C to 125°C temperature range with supply voltage from 2.5V to 5.5V.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in automotive digital isolation applications while maintaining system compliance and performance specifications.

Substiute Parts

SI8622BT-AS

Skyworks Solutions Inc.In Stock: 1132SI8622BT-AS Datasheet

Current PartRFQ

SI8622BD-AS

Skyworks Solutions Inc.In Stock: 1930SI8622BD-AS Datasheet

Parametric EquivalentRFQ

SI8622ED-AS

Skyworks Solutions Inc.In Stock: 1731SI8622ED-AS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI8622BT-AS are identified based on strict equivalence of the following critical parameters:

Mandatory Equivalence Criteria:

• Isolation voltage: 5000Vrms
• Number of channels: 2
• Data rate: 150Mbps
• Package type: 16-SOIC (0.295", 7.50mm Width)
• Supply voltage range: 2.5V – 5.5V
• Operating temperature range: -40°C to 125°C
• Grade: Automotive
• Qualification: AEC-Q100
• Technology: Capacitive Coupling
• Propagation delay specifications: 13ns (tpLH / tpHL Max)
• Pulse width distortion: 4.5ns (Max)

Allowable Variation: Common mode transient immunity (CMTI) may vary between 35kV/µs and 60kV/µs. Parts with lower CMTI values (35kV/µs) remain functionally equivalent when the application does not require the higher 60kV/µs specification.

The substitute parts SI8622BD-AS and SI8622ED-AS meet all mandatory equivalence criteria with the noted CMTI variation.

Parameter Comparison

Engineering Selection Recommendations

SI8622BT-AS is the primary selection when applications require the maximum common mode transient immunity specification of 60kV/µs. This higher CMTI rating provides enhanced performance in high-speed switching environments with steep voltage transitions.

SI8622BD-AS and SI8622ED-AS are functionally equivalent substitutes with 35kV/µs CMTI specification. These parts are suitable for applications where the lower CMTI rating meets system requirements. Both substitute parts maintain identical electrical performance in propagation delay, data rate, isolation voltage, and supply voltage specifications.

All three parts carry active product status, automotive grade qualification, and AEC-Q100 compliance, ensuring suitability for automotive digital isolation applications. The identical package configuration (16-SOIC) and pinout enable direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SI8622BD-AS or SI8622ED-AS replace SI8622BT-AS in any application?

A: SI8622BD-AS and SI8622ED-AS are functionally equivalent substitutes when the application does not require the 60kV/µs common mode transient immunity specification. If your circuit design specifies or depends on 60kV/µs CMTI performance, the SI8622BT-AS is the required selection. For applications with lower CMTI requirements (35kV/µs or less), the substitute parts provide equivalent performance across all other electrical parameters.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts—SI8622BT-AS, SI8622BD-AS, and SI8622ED-AS—use identical 16-SOIC (0.295", 7.50mm Width) packaging with the same pinout configuration. Direct board-level substitution is possible without PCB layout changes.

Q: Do all three parts meet automotive qualification requirements?

A: Yes. SI8622BT-AS, SI8622BD-AS, and SI8622ED-AS are all automotive grade devices qualified to AEC-Q100 standards. All three parts are suitable for automotive applications requiring 5000Vrms isolation.

Q: What is the primary difference between these substitute parts?

A: The primary difference is the common mode transient immunity (CMTI) specification. SI8622BT-AS provides 60kV/µs CMTI, while SI8622BD-AS and SI8622ED-AS provide 35kV/µs CMTI. All other electrical and mechanical parameters are identical.

Q: Can I use SI8622BD-AS if my design was originally specified for SI8622BT-AS?

A: Substitution is permissible only if your circuit design does not require the 60kV/µs CMTI performance of the SI8622BT-AS. Review your system specifications for common mode transient immunity requirements before substitution. If your application operates in high-speed switching environments with steep voltage transitions exceeding 35kV/µs, the SI8622BT-AS is required.

Q: Are SI8622BD-AS and SI8622ED-AS interchangeable with each other?

A: Yes. SI8622BD-AS and SI8622ED-AS are interchangeable. Both parts have identical electrical specifications, including 35kV/µs CMTI, 150Mbps data rate, 5000Vrms isolation, and all other parameters listed in the comparison table.