SI8630BT-ASR Equivalent & Substitute Parts

Part Overview

The SI8630BT-ASR is a general purpose digital isolator manufactured by Skyworks Solutions Inc., designed for automotive applications with 5000Vrms isolation capability and 3 isolated channels. This component operates across the automotive temperature range of -40°C to 125°C and meets AEC-Q100 qualification standards. The part is currently in active production status with 680 pieces available in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained while accommodating design flexibility, inventory availability, or packaging preferences. The SI8620 series variants listed below provide functional alternatives for applications where channel count reduction is acceptable.

Substiute Parts

SI8630BT-ASR

Skyworks Solutions Inc.In Stock: 741SI8630BT-ASR Datasheet

Current PartRFQ

SI8620BD-B-ISR

Skyworks Solutions Inc.In Stock: 22915SI8620BD-B-ISR Datasheet

Parametric EquivalentRFQ

SI8620ED-B-ISR

Skyworks Solutions Inc.In Stock: 19027SI8620ED-B-ISR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI8630BT-ASR is determined by the following critical parameters:

Mandatory Matching Parameters:

• Voltage - Isolation: 5000Vrms (must match exactly)
• Package / Case: 16-SOIC (0.295", 7.50mm Width) (must match exactly)
• Voltage - Supply: 2.5V - 5.5V (must match exactly)
• Operating Temperature: -40°C to 125°C (must match exactly)
• Technology: Capacitive Coupling (must match exactly)
• Mounting Type: Surface Mount (must match exactly)

Allowable Variation Parameters:

• Number of Channels: Can be reduced from 3 to 2 channels
• Common Mode Transient Immunity (Min): Can be reduced from 60kV/µs to 35kV/µs
• Data Rate: Must remain at 150Mbps (no variation)
• Propagation Delay: Must remain at 13ns maximum (no variation)
• Packaging Format: Can vary between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel®

The SI8620 series variants meet all mandatory parameters while accepting reduced channel count and CMTI specifications. These substitutes are suitable for applications requiring fewer isolated channels or lower transient immunity thresholds.

Parameter Comparison

Engineering Selection Recommendations

SI8630BT-ASR Selection Criteria: Select the SI8630BT-ASR when the application requires three isolated channels with 60kV/µs common mode transient immunity. This part maintains active production status and AEC-Q100 automotive qualification. The Tape & Reel packaging format supports high-volume manufacturing processes.

SI8620ED-B-ISR Selection Criteria: Select the SI8620ED-B-ISR when the application requires only two isolated channels and can operate with 35kV/µs common mode transient immunity. This variant is supplied in Tape & Reel format, matching the packaging preference of the main part. The part maintains active production status with higher inventory availability (18,950 pieces in stock) and ROHS3 compliance certification.

SI8620BD-B-ISR Selection Criteria: Select the SI8620BD-B-ISR when the application requires only two isolated channels, can operate with 35kV/µs common mode transient immunity, and requires Cut Tape or Digi-Reel® packaging formats. This variant offers the highest inventory availability (22,900 pieces in stock) and ROHS3 compliance certification.

All three parts maintain identical electrical performance for propagation delay, pulse width distortion, rise/fall time, supply voltage range, and operating temperature specifications. Selection between substitutes depends on channel count requirements, transient immunity thresholds, and packaging format compatibility with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SI8620 series parts directly replace the SI8630BT-ASR in all applications?

A: No. SI8620 series parts have two channels instead of three and lower common mode transient immunity (35kV/µs versus 60kV/µs). Substitution is valid only when the application uses two or fewer isolated channels and does not require 60kV/µs CMTI performance.

Q: Are the SI8620ED-B-ISR and SI8620BD-B-ISR electrically identical?

A: Yes. Both SI8620ED-B-ISR and SI8620BD-B-ISR are electrically identical. The difference is packaging format: SI8620ED-B-ISR uses Tape & Reel (TR), while SI8620BD-B-ISR uses Cut Tape (CT) & Digi-Reel®. Select based on assembly equipment compatibility.

Q: Do all three parts meet automotive qualification requirements?

A: The SI8630BT-ASR explicitly carries AEC-Q100 qualification and Automotive grade designation. The SI8620 series variants do not list AEC-Q100 qualification in the provided specifications. Verify automotive qualification requirements with the manufacturer before substitution in safety-critical automotive applications.

Q: What is the impact of reduced common mode transient immunity on circuit design?

A: Common mode transient immunity (CMTI) determines the maximum rate of voltage change the isolator can withstand without introducing errors. Reducing from 60kV/µs to 35kV/µs limits the isolator's performance in high-speed switching environments. Applications with slower switching transitions or lower dV/dt requirements can operate with 35kV/µs CMTI.

Q: Are there any compliance differences between the three parts?

A: SI8620ED-B-ISR and SI8620BD-B-ISR both carry ROHS3 Compliant and REACH Unaffected certifications. The SI8630BT-ASR does not list these certifications in the provided specifications. All three parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: How does channel count affect PCB layout and design?

A: The SI8630BT-ASR provides three isolated channels in a 16-SOIC package, while SI8620 variants provide two channels in the same package footprint. Both use identical 16-SOIC (0.295", 7.50mm Width) packages, so PCB footprints are compatible. Design changes are required only if the application architecture depends on three isolated channels.

Q: What inventory considerations apply to these substitutes?

A: SI8630BT-ASR has 680 pieces in stock. SI8620ED-B-ISR has 18,950 pieces in stock. SI8620BD-B-ISR has 22,900 pieces in stock. Higher inventory availability for SI8620 variants may support shorter lead times for high-volume production requirements.