SI8622BT-AS2 Equivalent & Substitute Parts

Part Overview

The SI8622BT-AS2 is an automotive-grade general purpose digital isolator manufactured by Skyworks Solutions Inc. This component provides galvanic isolation with 5000Vrms isolation voltage across 2 channels, supporting data rates up to 150Mbps with a common mode transient immunity (CMTI) of 60kV/µs. The device is packaged in a 16-SOIC surface mount package and operates across the automotive temperature range of -40°C to 125°C with AEC-Q100 qualification.

The SI8622BT-AS2 is currently in active production status. Substitute parts are identified for applications requiring equivalent isolation performance, channel configuration, and package compatibility while accommodating variations in specific electrical parameters.

Substiute Parts

SI8622BT-AS2

Skyworks Solutions Inc.In Stock: 1163SI8622BT-AS2 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-AS2 are identified based on strict parameter equivalence within the SI8622 product family. The substitution logic is based on the following critical parameters that must remain constant:

Mandatory Equivalence Parameters:

• Isolation voltage: 5000Vrms
• Number of channels: 2
• Channel configuration: 1/1 (unidirectional)
• 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

Variable Parameters Allowing Substitution:

• Common Mode Transient Immunity (CMTI): The SI8622BT-AS2 specifies 60kV/µs minimum, while substitute parts SI8622BD-AS and SI8622ED-AS specify 35kV/µs minimum. This represents a reduction in CMTI performance.
• Moisture Sensitivity Level (MSL): The SI8622BT-AS2 has MSL 3 (168 Hours), while substitutes have MSL 2A (4 Weeks), indicating improved moisture handling.
• Propagation delay and pulse width distortion remain identical across all variants.

The SI8622BD-AS and SI8622ED-AS are parametric equivalents within the SI8622 family, differing only in CMTI specification and moisture sensitivity classification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SI8622BT-AS2, SI8622BD-AS, and SI8622ED-AS—are active production components with identical AEC-Q100 automotive qualification and identical core isolation, channel, and timing specifications. Selection between these parts is determined by application-specific requirements for common mode transient immunity and moisture sensitivity handling.

SI8622BT-AS2 Selection Criteria:

• Applications requiring maximum common mode transient immunity of 60kV/µs
• Designs where CMTI margin is critical for signal integrity in high-noise automotive environments
• Moisture sensitivity level 3 (168 hours) is acceptable for the application's storage and assembly conditions

SI8622BD-AS or SI8622ED-AS Selection Criteria:

• Applications where 35kV/µs CMTI meets system requirements
• Designs benefiting from improved moisture sensitivity classification (MSL 2A, 4 weeks)
• Reduced moisture absorption characteristics support extended storage and assembly timelines
• Both parts are functionally equivalent; selection between BD-AS and ED-AS variants is determined by supply chain availability and inventory requirements

All three parts maintain identical electrical performance in propagation delay, pulse width distortion, rise/fall time, data rate, and supply voltage specifications. Package footprint and thermal characteristics are identical across all variants.

Frequently Asked Questions (FAQ)

Q: Can SI8622BD-AS or SI8622ED-AS be used as direct replacements for SI8622BT-AS2 in existing designs?

A: SI8622BD-AS and SI8622ED-AS are parametric equivalents with identical isolation voltage, channel configuration, data rate, package, and operating temperature range. The primary difference is common mode transient immunity (60kV/µs vs. 35kV/µs). Direct substitution is valid if the application's common mode transient environment does not exceed 35kV/µs. If the design margin for CMTI is critical, the higher 60kV/µs specification of SI8622BT-AS2 should be retained.

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

A: SI8622BD-AS and SI8622ED-AS are electrically identical. Both specify 35kV/µs CMTI and MSL 2A (4 Weeks) moisture sensitivity. The designations BD-AS and ED-AS represent different product variants within the SI8622 family. Selection between these two parts is based on supplier availability and inventory status.

Q: Does the moisture sensitivity level difference affect PCB assembly compatibility?

A: Yes. SI8622BT-AS2 has MSL 3 (168 hours), allowing extended dry storage and assembly windows. SI8622BD-AS and SI8622ED-AS have MSL 2A (4 weeks), requiring more stringent moisture control during storage and assembly. If the assembly process includes extended lead times or high-humidity environments, the MSL classification must be verified against manufacturing conditions.

Q: Are all three parts qualified to the same automotive standard?

A: Yes. SI8622BT-AS2, SI8622BD-AS, and SI8622ED-AS all carry AEC-Q100 automotive qualification and are rated for -40°C to 125°C operating temperature. All three are suitable for automotive applications meeting this qualification level.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: Yes, from a mechanical and electrical interface perspective. All three parts use identical 16-SOIC (0.295", 7.50mm Width) packaging with identical pin configuration and footprint. Electrical substitution is valid provided the application's common mode transient immunity requirement does not exceed the specified CMTI of the substitute part.

Q: What supply voltage range do these isolators support?

A: All three parts operate across 2.5V to 5.5V supply voltage range, supporting both 3.3V and 5V logic systems commonly used in automotive applications.