SI8630BD-ASR Equivalent & Substitute Parts

Part Overview

The SI8630BD-ASR is an automotive-grade general purpose digital isolator manufactured by Skyworks Solutions Inc. This 3-channel capacitive coupling isolator provides 5000Vrms isolation with 150Mbps data rate capability and 60kV/µs common mode transient immunity. The device is packaged in 16-SOIC (0.295", 7.50mm Width) surface mount configuration and qualified to AEC-Q100 automotive standards for operating temperatures from -40°C to 125°C. The SI8630BD-ASR is currently in active product status with 782 pieces available in inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement while maintaining system-level performance requirements. The primary constraint for substitution is the reduction in channel count from 3 channels (main part) to 2 channels (substitute parts), which limits applicability to designs requiring 2-channel isolation only.

Key Parameters

Parameter	Value	Substitution Relevance
Voltage - Isolation	5000Vrms	Critical - must match for equivalent isolation performance
Number of Channels	3	Critical - determines functional capacity
Common Mode Transient Immunity (Min)	60kV/µs	Critical - defines noise immunity specification
Data Rate	150Mbps	Critical - establishes bandwidth capability
Voltage - Supply	2.5V ~ 5.5V	Critical - determines power supply compatibility
Package / Case	16-SOIC (0.295", 7.50mm Width)	Critical - ensures PCB layout compatibility
Operating Temperature	-40°C ~ 125°C	Critical - defines environmental operating range
Technology	Capacitive Coupling	Critical - isolation method
Grade	Automotive	Critical - qualification level
Propagation Delay tpLH / tpHL (Max)	13ns, 13ns	Important - timing specification
Pulse Width Distortion (Max)	4.5ns	Important - signal integrity parameter
Mounting Type	Surface Mount	Important - assembly method

Substitute Part Grouping Explanation

Substitute parts for the SI8630BD-ASR are identified from the SI8620 series, which maintains electrical equivalence in isolation voltage, data rate, propagation delay, pulse width distortion, rise/fall time, supply voltage range, operating temperature range, and package configuration. The SI8620 series differs in two critical parameters:

Channel Count Reduction: The SI8630BD-ASR provides 3 unidirectional channels (3 inputs on Side 1, 0 on Side 2), while substitute parts SI8620BD-B-ISR and SI8620ED-B-ISR provide 2 unidirectional channels (2 inputs on Side 1, 0 on Side 2). This reduction limits substitution applicability to designs requiring maximum 2-channel isolation.

Common Mode Transient Immunity (CMTI): The SI8630BD-ASR specifies 60kV/µs minimum CMTI, while substitute parts specify 35kV/µs minimum CMTI. This represents a lower noise immunity specification in substitute parts.

Packaging Format: Substitute parts are available in two packaging formats: SI8620BD-B-ISR (Cut Tape & Digi-Reel) and SI8620ED-B-ISR (Tape & Reel). The main part SI8630BD-ASR is supplied in Tape & Reel format.

Substitution is valid only when the design requires 2-channel isolation, can tolerate 35kV/µs CMTI specification, and maintains all other electrical and mechanical requirements.

Parameter Comparison

Parameter	SI8630BD-ASR (Main)	SI8620BD-B-ISR (Substitute)	SI8620ED-B-ISR (Substitute)
Manufacturer	Skyworks Solutions Inc.	Skyworks Solutions Inc.	Skyworks Solutions Inc.
Technology	Capacitive Coupling	Capacitive Coupling	Capacitive Coupling
Type	General Purpose	General Purpose	General Purpose
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Number of Channels	3	2	2
Channel Type	Unidirectional	Unidirectional	Unidirectional
Common Mode Transient Immunity (Min)	60kV/µs	35kV/µs	35kV/µs
Data Rate	150Mbps	150Mbps	150Mbps
Propagation Delay tpLH (Max)	13ns	13ns	13ns
Propagation Delay tpHL (Max)	13ns	13ns	13ns
Pulse Width Distortion (Max)	4.5ns	4.5ns	4.5ns
Rise Time (Typ)	2.5ns	2.5ns	2.5ns
Fall Time (Typ)	2.5ns	2.5ns	2.5ns
Voltage - Supply	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)
Product Status	Active	Active	Active
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)
ECCN	EAR99	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001	8542.39.0001

Engineering Selection Recommendations

SI8630BD-ASR Selection: Use the SI8630BD-ASR when the design requires 3-channel digital isolation with 60kV/µs common mode transient immunity. This part is qualified to AEC-Q100 automotive standards and maintains active product status with adequate inventory availability (782 pieces). The Tape & Reel packaging format supports high-volume automated assembly processes.

SI8620BD-B-ISR Selection: Use SI8620BD-B-ISR as a substitute when the design requires 2-channel isolation, can operate with 35kV/µs CMTI specification, and requires Cut Tape or Digi-Reel packaging format. This part is ROHS3 compliant and REACH unaffected, with higher inventory availability (22,900 pieces). Product status is active.

SI8620ED-B-ISR Selection: Use SI8620ED-B-ISR as a substitute when the design requires 2-channel isolation, can operate with 35kV/µs CMTI specification, and requires Tape & Reel packaging format matching the main part. This part is ROHS3 compliant and REACH unaffected, with inventory availability of 18,950 pieces. Product status is active.

All substitute parts maintain identical propagation delay, pulse width distortion, rise/fall time, supply voltage range, operating temperature range, and 16-SOIC package dimensions. Substitution is not valid for designs requiring 3-channel isolation or 60kV/µs CMTI specification.

Frequently Asked Questions (FAQ)

Q: Can SI8620BD-B-ISR or SI8620ED-B-ISR replace SI8630BD-ASR in all applications?

A: No. Substitution is valid only when the design requires maximum 2-channel isolation and can tolerate 35kV/µs common mode transient immunity. If the design requires 3 channels or 60kV/µs CMTI, substitution is not applicable.

Q: What is the difference between SI8620BD-B-ISR and SI8620ED-B-ISR?

A: Both parts are electrically identical with 2-channel isolation, 5000Vrms voltage rating, 150Mbps data rate, and 35kV/µs CMTI. The primary difference is packaging format: SI8620BD-B-ISR is supplied in Cut Tape & Digi-Reel format, while SI8620ED-B-ISR is supplied in Tape & Reel format. SI8620ED-B-ISR packaging matches the SI8630BD-ASR Tape & Reel format.

Q: Are the propagation delay and timing specifications identical between the main part and substitutes?

A: Yes. Both SI8620 substitute parts maintain identical propagation delay (13ns maximum for both tpLH and tpHL), pulse width distortion (4.5ns maximum), and rise/fall time (2.5ns typical) specifications as the SI8630BD-ASR.

Q: Do the substitute parts meet automotive qualification requirements?

A: The SI8630BD-ASR is explicitly qualified to AEC-Q100 automotive standards. The substitute parts SI8620BD-B-ISR and SI8620ED-B-ISR do not list AEC-Q100 qualification in the provided specifications. Automotive application requirements must be verified against actual qualification documentation.

Q: What is the impact of the 35kV/µs CMTI specification in substitute parts compared to 60kV/µs in the main part?

A: The 35kV/µs CMTI specification in substitute parts represents lower common mode transient immunity. Applications with high-speed common mode voltage transitions or high-noise environments may require the 60kV/µs specification of the main part. System-level noise analysis determines whether 35kV/µs is sufficient.

Q: Are the 16-SOIC package dimensions identical for all three parts?

A: Yes. All three parts use 16-SOIC (0.295", 7.50mm Width) surface mount package with identical dimensions. PCB layout and footprint are directly compatible.

Q: What is the supply voltage range for all parts?

A: All three parts operate with identical supply voltage range of 2.5V to 5.5V, ensuring power supply compatibility across substitution scenarios.

Q: Do the substitute parts have different moisture sensitivity specifications?

A: No. All three parts specify identical Moisture Sensitivity Level (MSL) of 2A with 4-week floor life, requiring identical handling and storage procedures.

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