SI86SS41BC-AS1 Equivalent & Substitute Parts

Part Overview

The SI86SS41BC-AS1 is a 3.75 kVRMS SPI-compatible digital isolator manufactured by Skyworks Solutions Inc. This device provides galvanic isolation for SPI communication interfaces with 4 channels (3 inputs on Side 1, 1 input on Side 2) and supports data rates up to 150 Mbps. The part is actively produced, automotive-grade qualified to AEC-Q100, and RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across isolation voltage, channel configuration, data rate, propagation delay, supply voltage range, and package specifications.

Key Parameters

Parameter	Value
Isolation Voltage	3750 Vrms
Number of Channels	4
Channel Configuration	3 Inputs (Side 1) / 1 Input (Side 2)
Data Rate	150 Mbps
Common Mode Transient Immunity (Min)	150 kV/µs
Propagation Delay (tpLH / tpHL Max)	42 ns / 42 ns
Pulse Width Distortion (Max)	2 ns
Supply Voltage Range	2.25 V – 5.5 V
Package / Case	16-SOIC (0.154", 3.90 mm Width)
Operating Temperature Range	-40°C to +125°C
Grade	Automotive
Qualification	AEC-Q100
Technology	Capacitive Coupling
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SI86SS41BC-AS1 are qualified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Isolation voltage: 3750 Vrms (exact match required)
Number of channels: 4 (exact match required)
Channel configuration: 3 inputs on Side 1, 1 input on Side 2 (exact match required)
Data rate: 150 Mbps (exact match required)
Common Mode Transient Immunity: 150 kV/µs minimum (exact match required)
Propagation delay: 42 ns maximum for both tpLH and tpHL (exact match required)
Pulse Width Distortion: 2 ns maximum (exact match required)
Supply voltage range: 2.25 V to 5.5 V (exact match required)

Mechanical & Compliance Equivalence Criteria:

Package: 16-SOIC (0.154", 3.90 mm Width) (exact match required)
Operating temperature: -40°C to +125°C (exact match required)
Grade: Automotive (exact match required)
Qualification: AEC-Q100 (exact match required)
Technology: Capacitive Coupling (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Only parts meeting all criteria are listed as direct substitutes.

Parameter Comparison

Parameter	SI86SS41BC-AS1	SI86S641BC-AS1
Manufacturer	Skyworks Solutions Inc.	Skyworks Solutions Inc.
Isolation Voltage	3750 Vrms	3750 Vrms
Number of Channels	4	4
Inputs - Side 1 / Side 2	3 / 1	3 / 1
Channel Type	Unidirectional	Unidirectional
Data Rate	150 Mbps	150 Mbps
Common Mode Transient Immunity (Min)	150 kV/µs	150 kV/µs
Propagation Delay tpLH / tpHL (Max)	42 ns / 42 ns	42 ns / 42 ns
Pulse Width Distortion (Max)	2 ns	2 ns
Rise / Fall Time (Typ)	2.5 ns / 2.5 ns	2.5 ns / 2.5 ns
Supply Voltage Range	2.25 V – 5.5 V	2.25 V – 5.5 V
Package / Case	16-SOIC (0.154", 3.90 mm Width)	16-SOIC (0.154", 3.90 mm Width)
Operating Temperature Range	-40°C to +125°C	-40°C to +125°C
Grade	Automotive	Automotive
Qualification	AEC-Q100	AEC-Q100
Technology	Capacitive Coupling	Capacitive Coupling
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)
Product Status	Active	Active

Engineering Selection Recommendations

Both the SI86SS41BC-AS1 and SI86S641BC-AS1 are active production parts from Skyworks Solutions Inc. with identical electrical and mechanical specifications. Both devices meet automotive-grade requirements with AEC-Q100 qualification and are RoHS3 compliant. Selection between these parts may be based on inventory availability, lead time, or procurement source, as they are functionally equivalent for all specified applications. Both parts are suitable for automotive SPI isolation applications requiring 3.75 kVRMS isolation, 150 Mbps data rates, and operation across the -40°C to +125°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can SI86S641BC-AS1 be used as a direct replacement for SI86SS41BC-AS1?

A: Yes. Both parts are manufactured by Skyworks Solutions Inc. and share identical electrical parameters (3750 Vrms isolation, 4 channels with 3/1 input configuration, 150 Mbps data rate, 150 kV/µs CMTI, 42 ns propagation delay), mechanical specifications (16-SOIC package), and compliance certifications (AEC-Q100, ROHS3). They are functionally equivalent for all SPI isolation applications.

Q: Are there any differences in package dimensions between these parts?

A: No. Both SI86SS41BC-AS1 and SI86S641BC-AS1 use the 16-SOIC (0.154", 3.90 mm Width) package with identical pin configurations and PCB footprints.

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

A: Yes. Both parts operate across the 2.25 V to 5.5 V supply voltage range and maintain identical propagation delay and pulse width distortion specifications across this range.

Q: Are both parts qualified for automotive applications?

A: Yes. Both SI86SS41BC-AS1 and SI86S641BC-AS1 are automotive-grade parts with AEC-Q100 qualification and are suitable for automotive SPI isolation applications.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have a Moisture Sensitivity Level (MSL) of 2 with a 1-year floor life rating.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The parts are pin-compatible, electrically equivalent, and mechanically identical. No design changes are required for substitution.

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