SI86S641HC-AS1 Equivalent & Substitute Parts

Part Overview

The SI86S641HC-AS1 is a 3.75 KVRMS SPI digital isolator manufactured by Skyworks Solutions Inc. This capacitive coupling isolator provides galvanic isolation for SPI communication interfaces with 4 unidirectional channels (3 inputs on Side 1, 1 input on Side 2). The device is qualified to AEC-Q100 automotive standards and operates across the industrial temperature range of -40°C to 125°C. The part is currently in active production status with 1094 units available in stock. Substitute parts are identified to support design flexibility, inventory management, and supply chain continuity while maintaining identical electrical and mechanical specifications.

Substiute Parts

SI86S641HC-AS1

Skyworks Solutions Inc.In Stock: 1111SI86S641HC-AS1 Datasheet

Current PartRFQ

SI86S641BC-AS1

Skyworks Solutions Inc.In Stock: 1169SI86S641BC-AS1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI86S641HC-AS1 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part SI86S641BC-AS1 shares the same base product number (SI86S641) and maintains identical specifications in the following key areas:

Electrical Parameters (Must Match):

• Isolation voltage: 3750 Vrms
• Channel count and configuration: 4 unidirectional channels (3/1)
• Data rate: 150 Mbps
• Common mode transient immunity: 150 kV/µs
• Supply voltage range: 2.25V – 5.5V
• Propagation delay: 42 ns (tpLH and tpHL)
• Pulse width distortion: 2 ns maximum
• Rise/fall time: 2.5 ns typical

Mechanical & Environmental Parameters (Must Match):

• Package type: 16-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 125°C
• Automotive qualification: AEC-Q100
• RoHS status: ROHS3 Compliant
• Moisture sensitivity level: 2 (1 Year)

The difference between SI86S641HC-AS1 and SI86S641BC-AS1 is limited to the temperature grade designation (HC vs. BC suffix), which does not alter the functional or electrical performance within the specified operating range.

Parameter Comparison

Engineering Selection Recommendations

Both SI86S641HC-AS1 and SI86S641BC-AS1 are active production parts manufactured by Skyworks Solutions Inc. and carry identical AEC-Q100 automotive qualification. Both parts are ROHS3 compliant and maintain the same moisture sensitivity level (MSL 2, 1 Year). Selection between these parts should be based on:

Availability: Both parts are in stock with comparable inventory levels (1094 vs. 1093 units). Selection may be driven by immediate supply requirements.

Compliance Requirements: Both parts satisfy automotive-grade applications requiring AEC-Q100 qualification and ROHS3 compliance.

Functional Equivalence: All electrical and mechanical parameters are identical, ensuring direct substitution without circuit redesign or PCB layout modification.

Temperature Grade Designation: The HC and BC suffixes indicate temperature grade classifications. Both operate across the identical -40°C to 125°C range specified in this reference.

Frequently Asked Questions (FAQ)

Q: Can SI86S641BC-AS1 be used as a direct replacement for SI86S641HC-AS1?

A: Yes. Both parts share identical electrical specifications, isolation voltage, channel configuration, data rate, CMTI, supply voltage range, operating temperature range, package type, and automotive qualifications. Direct substitution is supported without circuit modification.

Q: Are there any differences in isolation performance between these parts?

A: No. Both parts provide 3750 Vrms isolation voltage and 150 kV/µs common mode transient immunity. Propagation delay, pulse width distortion, and rise/fall times are identical.

Q: Do both parts use the same package and mounting footprint?

A: Yes. Both parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package. PCB layouts and footprints are interchangeable.

Q: Are both parts qualified for automotive applications?

A: Yes. Both SI86S641HC-AS1 and SI86S641BC-AS1 carry AEC-Q100 automotive qualification and are ROHS3 compliant.

Q: What is the difference between the HC and BC designations?

A: The HC and BC suffixes indicate temperature grade classifications assigned by the manufacturer. Both parts operate across the identical -40°C to 125°C operating temperature range.

Q: Can these parts be mixed in the same production batch?

A: Yes. Since all electrical, mechanical, and environmental specifications are identical, both parts can be used interchangeably in the same design and production environment.

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

A: Both parts have MSL 2 (1 Year) rating, indicating identical moisture handling and storage requirements.

Q: Are there any supply chain or lead time differences?

A: Both parts are active production items with comparable inventory availability. Lead times and supply chain status should be confirmed with the distributor or manufacturer for current conditions.