SI8630BT-AS Equivalent & Substitute Parts

Part Overview

The SI8630BT-AS is an automotive-grade general purpose digital isolator manufactured by Skyworks Solutions Inc. This device provides galvanic isolation using capacitive coupling technology with 5000Vrms isolation voltage across 3 channels. The part operates at data rates up to 150Mbps with high common mode transient immunity of 60kV/µs, making it suitable for automotive applications requiring robust noise immunity. The SI8630BT-AS maintains Active product status with AEC-Q100 automotive qualification. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement while maintaining system performance requirements.

Substiute Parts

SI8630BT-AS

Skyworks Solutions Inc.In Stock: 1026SI8630BT-AS Datasheet

Current PartRFQ

SI8610BD-B-IS

Skyworks Solutions Inc.In Stock: 1335SI8610BD-B-IS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI8630BT-AS are identified based on strict equivalence of critical electrical and mechanical parameters. The substitution logic is governed by the following key parameters:

Isolation Voltage (5000Vrms): All substitute parts must maintain the same isolation voltage rating to ensure equivalent galvanic isolation performance.

Package Type (16-SOIC): Physical package compatibility is mandatory. All substitutes use the identical 16-SOIC (0.295", 7.50mm Width) package to ensure PCB layout compatibility and mounting consistency.

Supply Voltage Range (2.5V ~ 5.5V): Substitute parts must operate within the same supply voltage window to ensure compatibility with existing power distribution networks.

Operating Temperature Range (-40°C ~ 125°C): Automotive-grade temperature range must be maintained for all substitutes to support the same environmental operating conditions.

Technology (Capacitive Coupling): All substitutes employ the same isolation technology to maintain electrical performance characteristics.

Data Rate (150Mbps): Substitute parts must support the same or higher data rate to ensure signal integrity and timing compatibility.

Propagation Delay and Pulse Width Distortion: Timing parameters must remain within specified limits to prevent signal degradation in high-speed applications.

The SI8610BD-B-IS is identified as a parametric equivalent based on these criteria, with the primary functional difference being the number of isolated channels (1 channel versus 3 channels in the main part).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

The SI8630BT-AS remains the primary choice for applications requiring 3-channel isolation with 60kV/µs common mode transient immunity. This part maintains Active product status with AEC-Q100 automotive qualification, ensuring long-term availability and compliance with automotive reliability standards.

Substitute Applicability:

The SI8610BD-B-IS serves as a substitute only in applications where single-channel isolation is functionally sufficient. This part is also Active with equivalent automotive-grade specifications and identical package compatibility. However, the SI8610BD-B-IS provides 35kV/µs common mode transient immunity, which is lower than the SI8630BT-AS specification of 60kV/µs.

Compliance and Qualification:

Both parts maintain Active product status and are manufactured by the same supplier using identical capacitive coupling technology. Both support the full automotive operating temperature range (-40°C to 125°C) and identical supply voltage specifications (2.5V to 5.5V).

Channel Count Consideration:

Direct substitution of SI8610BD-B-IS for SI8630BT-AS is limited to designs requiring only single-channel isolation. Applications utilizing multiple isolated channels require the 3-channel SI8630BT-AS configuration.

Frequently Asked Questions (FAQ)

Q: Can the SI8610BD-B-IS replace the SI8630BT-AS in all applications?

A: No. The SI8610BD-B-IS provides only 1 isolated channel compared to the 3 channels in the SI8630BT-AS. Substitution is only valid for applications requiring single-channel isolation. Additionally, the SI8610BD-B-IS has a lower common mode transient immunity rating (35kV/µs versus 60kV/µs).

Q: Are the package dimensions identical between these parts?

A: Yes. Both the SI8630BT-AS and SI8610BD-B-IS use the 16-SOIC (0.295", 7.50mm Width) package. PCB footprints and mounting requirements are identical.

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

A: Yes. Both parts operate with supply voltage from 2.5V to 5.5V, ensuring compatibility with standard automotive power distribution systems.

Q: What is the difference in common mode transient immunity between these parts?

A: The SI8630BT-AS specifies 60kV/µs minimum common mode transient immunity, while the SI8610BD-B-IS specifies 35kV/µs. In high-noise automotive environments, the higher CMTI rating of the SI8630BT-AS provides superior noise rejection capability.

Q: Are both parts automotive-qualified?

A: Yes. Both the SI8630BT-AS and SI8610BD-B-IS are automotive-grade components with AEC-Q100 qualification and support the full automotive operating temperature range of -40°C to 125°C.

Q: What is the data rate specification for both parts?

A: Both parts support 150Mbps data rate with identical propagation delay (13ns maximum for both tpLH and tpHL) and pulse width distortion (4.5ns maximum).

Q: Can I use multiple SI8610BD-B-IS devices to replace a single SI8630BT-AS?

A: While multiple single-channel devices could theoretically provide equivalent channel count, this approach increases PCB area, component count, and assembly complexity. The SI8630BT-AS remains the appropriate choice for 3-channel isolation requirements.