SI86S620EC-AS Digital Isolator Equivalent & Substitute Parts

Part Overview

The SI86S620EC-AS is a general purpose digital isolator manufactured by Skyworks Solutions Inc., designed for automotive-grade applications requiring galvanic isolation. This 3.75 kVRMS capacitive coupling isolator provides 2-channel unidirectional isolation with 150 Mbps data rate capability and 100 kV/µs common mode transient immunity. The device is housed in an 8-SOIC surface mount package and operates across the -40°C to 125°C temperature range.

The SI86S620EC-AS maintains Active product status with AEC-Q100 automotive qualification and ROHS3 compliance. Substitute parts are identified based on identical electrical performance parameters, mechanical compatibility, and qualification standards to ensure direct functional replacement in existing designs.

Key Parameters

Parameter	Value
Isolation Voltage	3750 Vrms
Number of Channels	2
Channel Configuration	Unidirectional (2 inputs / 0 outputs)
Data Rate	150 Mbps
Common Mode Transient Immunity (CMTI)	100 kV/µs (minimum)
Propagation Delay (tpLH / tpHL)	13.5 ns / 13.5 ns (maximum)
Pulse Width Distortion	2.5 ns (maximum)
Supply Voltage Range	2.25 V to 5.5 V
Operating Temperature	-40°C to 125°C
Package Type	8-SOIC (0.154", 3.90 mm width)
Technology	Capacitive Coupling
Automotive Grade	Yes (AEC-Q100)
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	MSL 2 (1 Year)

Substitute Part Grouping Explanation

Substitute parts for the SI86S620EC-AS are identified from the Si86S62x series based on strict parameter equivalence. Substitution is valid when all of the following criteria are met:

Critical Substitution Parameters:

Isolation voltage: 3750 Vrms
Channel count: 2 channels
Channel type: Unidirectional configuration
Data rate: 150 Mbps
CMTI rating: 100 kV/µs minimum
Propagation delay: 13.5 ns maximum (both tpLH and tpHL)
Pulse width distortion: 2.5 ns maximum
Supply voltage range: 2.25 V to 5.5 V
Operating temperature range: -40°C to 125°C
Package: 8-SOIC (0.154", 3.90 mm width)
Technology: Capacitive coupling
Automotive qualification: AEC-Q100
RoHS status: ROHS3 compliant

The substitute parts SI86S620BC-AS and SI86S620BC-IS meet all electrical and mechanical parameters specified above. Differences in temperature grade designation (EC vs. BC) and supply voltage specification method do not affect functional equivalence for applications within the stated operating range.

Parameter Comparison

Parameter	SI86S620EC-AS	SI86S620BC-AS	SI86S620BC-IS
Manufacturer	Skyworks Solutions Inc.	Skyworks Solutions Inc.	Skyworks Solutions Inc.
Series	Si86S62x	Si86S62x	Si86S62x
Product Status	Active	Active	Active
Isolation Voltage	3750 Vrms	3750 Vrms	3750 Vrms
Number of Channels	2	2	2
Channel Type	Unidirectional	Unidirectional	Unidirectional
Inputs - Side 1/Side 2	2/0	2/0	2/0
Data Rate	150 Mbps	150 Mbps	150 Mbps
CMTI (Minimum)	100 kV/µs	100 kV/µs	100 kV/µs
Propagation Delay tpLH (Max)	13.5 ns	13.5 ns	13.5 ns
Propagation Delay tpHL (Max)	13.5 ns	13.5 ns	13.5 ns
Pulse Width Distortion (Max)	2.5 ns	2.5 ns	2.5 ns
Rise Time (Typical)	2.5 ns	2.5 ns	2.5 ns
Fall Time (Typical)	2.5 ns	2.5 ns	2.5 ns
Supply Voltage Range	2.25 V to 5.5 V	2.25 V to 5.5 V	2.25 V to 5.5 V
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Technology	Capacitive Coupling	Capacitive Coupling	Capacitive Coupling
Type	General Purpose	General Purpose	General Purpose
Isolated Power	Yes	Yes	Yes
Package / Case	8-SOIC (0.154", 3.90 mm)	8-SOIC (0.154", 3.90 mm)	8-SOIC (0.154", 3.90 mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 2 (1 Year)	MSL 2 (1 Year)	MSL 2 (1 Year)
Base Product Number	SI86S620	SI86S620	SI86S620

Engineering Selection Recommendations

All three parts—SI86S620EC-AS, SI86S620BC-AS, and SI86S620BC-IS—are Active products from Skyworks Solutions Inc. within the Si86S62x series. Each part carries AEC-Q100 automotive qualification and ROHS3 compliance, confirming suitability for automotive-grade applications.

The SI86S620EC-AS and SI86S620BC-AS differ only in temperature grade designation (EC vs. BC), while both maintain identical electrical specifications and the same -40°C to 125°C operating range. The SI86S620BC-IS shares all electrical and mechanical parameters with SI86S620BC-AS.

Selection between these parts should be based on:

Availability and Lead Time: Current inventory levels are SI86S620EC-AS (961 pcs), SI86S620BC-AS (1060 pcs), and SI86S620BC-IS (1140 pcs).
Supply Chain Continuity: All three parts maintain Active status, ensuring long-term availability for production and field service applications.
Compliance Requirements: All parts meet automotive qualification standards (AEC-Q100) and environmental compliance (ROHS3), suitable for regulated automotive and industrial applications.
Packaging and Handling: All parts are supplied in Tube packaging with MSL 2 (1 Year) moisture sensitivity, requiring standard handling procedures for surface mount components.

Frequently Asked Questions (FAQ)

Q: Can SI86S620BC-AS be used as a direct replacement for SI86S620EC-AS?

A: Yes. Both parts are electrically and mechanically identical, with all critical parameters matching: 3750 Vrms isolation, 2-channel unidirectional configuration, 150 Mbps data rate, 100 kV/µs CMTI, 13.5 ns propagation delay, and 8-SOIC package. Both operate across -40°C to 125°C and carry AEC-Q100 qualification.

Q: What is the difference between SI86S620BC-AS and SI86S620BC-IS?

A: Both parts share identical electrical specifications and mechanical packaging. The difference lies in the temperature grade designation suffix (AS vs. IS), which reflects different qualification or supply chain classifications. All electrical parameters, including operating temperature range (-40°C to 125°C), remain equivalent.

Q: Are these parts suitable for automotive applications?

A: Yes. All three parts carry AEC-Q100 automotive qualification and ROHS3 compliance, confirming their suitability for automotive-grade designs requiring galvanic isolation.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (0.154", 3.90 mm width) package is a standard surface mount package for digital isolators. All substitute parts use identical package dimensions and pin configuration, ensuring direct PCB compatibility without layout modifications.

Q: Can these isolators be used in applications requiring isolated power?

A: Yes. All three parts feature isolated power capability, enabling independent power supply domains on each side of the isolation barrier.

Q: What is the moisture sensitivity level, and how does it affect handling?

A: All parts carry MSL 2 (1 Year) rating, indicating they must be stored in controlled humidity environments and used within one year of packaging opening. Standard surface mount assembly procedures and moisture-barrier packaging are required.

Q: Are there any temperature grade limitations between the EC and BC variants?

A: No. Both EC and BC variants operate across the identical -40°C to 125°C temperature range. The grade designation does not restrict operating temperature performance.

Q: What certifications confirm these parts meet regulatory requirements?

A: All parts carry AEC-Q100 automotive qualification and ROHS3 environmental compliance, confirming suitability for regulated automotive and industrial applications.

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