SI8622ET-AS Equivalent & Substitute Parts

Part Overview

The SI8622ET-AS is a General Purpose Digital Isolator manufactured by Skyworks Solutions Inc., designed for automotive applications requiring high-speed signal isolation. This component features 5000Vrms isolation voltage, 2-channel unidirectional architecture, and 150Mbps data rate capability with 60kV/µs common mode transient immunity. The device is qualified to AEC-Q100 automotive standards and operates across the -40°C to 125°C temperature range in a 16-SOIC surface mount package.

The SI8622ET-AS maintains Active product status with 1092 pieces currently in stock. Equivalent substitute parts are identified based on matching electrical isolation specifications, channel configuration, data rate performance, and automotive qualification requirements.

Substiute Parts

SI8622ET-AS

Skyworks Solutions Inc.In Stock: 1114SI8622ET-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 SI8622ET-AS are identified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

• Voltage - Isolation: 5000Vrms (exact match required)
• Number of Channels: 2 (exact match required)
• Channel Type: Unidirectional (exact match required)
• Data Rate: 150Mbps (exact match required)
• Package / Case: 16-SOIC (0.295", 7.50mm Width) (exact match required)
• Voltage - Supply: 2.5V ~ 5.5V (exact match required)
• Grade: Automotive (exact match required)
• Qualification: AEC-Q100 (exact match required)
• Operating Temperature: -40°C ~ 125°C (exact match required)
• Technology: Capacitive Coupling (exact match required)

Secondary Variation Parameter:

• Common Mode Transient Immunity (Min): The SI8622ET-AS specifies 60kV/µs, while substitute parts SI8622BD-AS and SI8622ED-AS specify 35kV/µs. This represents a lower CMTI specification in the substitute parts.

All substitute parts share the same base product number SI8622 and are manufactured by Skyworks Solutions Inc. with identical packaging, thermal specifications, and automotive qualification status.

Parameter Comparison

Engineering Selection Recommendations

SI8622ET-AS Primary Selection: The SI8622ET-AS is the primary component specification with Active product status and full AEC-Q100 automotive qualification. This part is suitable for applications requiring 60kV/µs common mode transient immunity in automotive isolation circuits. Current inventory of 1092 pieces supports production requirements.

SI8622BD-AS and SI8622ED-AS Substitution: Both SI8622BD-AS and SI8622ED-AS are functionally equivalent substitutes with identical electrical performance in all parameters except Common Mode Transient Immunity, which is specified at 35kV/µs compared to 60kV/µs for the SI8622ET-AS. Both substitute parts maintain Active product status, full AEC-Q100 automotive qualification, and identical package specifications.

The SI8622BD-AS provides 1883 pieces in inventory, while the SI8622ED-AS provides 1699 pieces in inventory. Both substitutes are suitable for applications where the 35kV/µs CMTI specification meets system requirements.

Compatibility Assurance: All three parts share identical supply voltage ranges (2.5V ~ 5.5V), operating temperature specifications (-40°C ~ 125°C), propagation delay characteristics (13ns maximum), and 16-SOIC package geometry. Direct pin-for-pin substitution is supported without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can SI8622BD-AS or SI8622ED-AS be used as direct replacements for SI8622ET-AS?

A: SI8622BD-AS and SI8622ED-AS are parametric equivalents with one specification difference: Common Mode Transient Immunity is 35kV/µs instead of 60kV/µs. Direct pin-for-pin substitution is supported. Selection depends on whether your application requires the higher 60kV/µs CMTI specification of the SI8622ET-AS or if the 35kV/µs specification of the substitute parts is sufficient.

Q: Are all three parts automotive qualified?

A: Yes. SI8622ET-AS, SI8622BD-AS, and SI8622ED-AS all carry Automotive grade designation and AEC-Q100 qualification. All three are suitable for automotive applications operating across -40°C to 125°C.

Q: What is the difference between SI8622BD-AS and SI8622ED-AS?

A: SI8622BD-AS and SI8622ED-AS are identical in all electrical and mechanical specifications. Both specify 35kV/µs Common Mode Transient Immunity and are packaged in 16-SOIC (0.295", 7.50mm Width). The primary difference is inventory availability: SI8622BD-AS has 1883 pieces in stock, while SI8622ED-AS has 1699 pieces in stock.

Q: Is the package identical across all three parts?

A: Yes. All three parts use the 16-SOIC (0.295", 7.50mm Width) surface mount package with identical pin configuration and PCB footprint. No layout modifications are required for substitution.

Q: What is the significance of the Common Mode Transient Immunity difference?

A: Common Mode Transient Immunity (CMTI) specifies the maximum rate of change of common mode voltage that the isolator can withstand without causing errors. SI8622ET-AS supports 60kV/µs, while SI8622BD-AS and SI8622ED-AS support 35kV/µs. Applications with high-speed switching or high dV/dt environments may require the higher 60kV/µs specification.

Q: Do all parts have the same moisture sensitivity level?

A: Yes. SI8622ET-AS, SI8622BD-AS, and SI8622ED-AS all specify MSL 2A (4 Weeks), indicating identical moisture handling and storage requirements.

Q: Are propagation delay and timing characteristics identical?

A: Yes. All three parts specify identical propagation delay (13ns maximum for both tpLH and tpHL), pulse width distortion (4.5ns maximum), and rise/fall time (2.5ns typical). Timing performance is equivalent across all three parts.

Q: Can these parts be used interchangeably in existing designs?

A: SI8622BD-AS and SI8622ED-AS can replace SI8622ET-AS in existing designs provided the application does not require the higher 60kV/µs CMTI specification. No circuit modifications, firmware changes, or PCB layout adjustments are necessary due to identical package and pin configuration.