Skyworks Solutions Inc. SI86SL41HC-IS1

Overview

SI86SL41HC-IS1 from Skyworks Solutions is a 4-channel, low-power digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, and selectable fail-safe default-high/low output during power loss. Used in battery management systems and traction inverters where high noise immunity and thermal robustness (–40 to 125 °C) are critical.

For engineers reviewing the SI86SL41HC-IS1 datasheet, SI86SL41HC-IS1 pinout, SI86SL41HC-IS1 application, or SI86SL41HC-IS1 equivalent, key selection criteria include its 6000 VRMS reinforced insulation per UL 1577 and VDE 60747-17, 10 ns typical propagation delay, 3.5 ns pulse width distortion, and support for isolated SPI interfaces in high-voltage automotive subsystems.

Technical Context

The SI86SL41HC-IS1 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and providing superior CMTI (>100 kV/µs) versus optocouplers. Its architecture delivers deterministic timing with no clock recovery or PLL, enabling precise signal transfer in motor control feedback loops and isolated ADC/DAC interfaces.

It operates across 2.25–5.5 V supply rails on both sides, supports independent undervoltage lockout (UVLO) and reset (RSTB) per side, and integrates input deglitch filtering (36 ns) to suppress transient noise in noisy industrial or automotive environments.

Key Specifications

Pinout & Package

SI86SL41HC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin assignments follow the Si86S64x/L4x family layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Compared with ADUM140D0BRWZ and ISO7741FDWR, SI86SL41HC-IS1 uniquely combines AEC-Q100 Grade 0 qualification, 6000 VRMS reinforced insulation, and 150 Mbps speed-making it the only drop-in solution for high-reliability EV powertrain isolation where safety and signal fidelity are co-constrained.

Availability

SI86SL41HC-IS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, onboard chargers, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for SI86SL41HC-IS1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in high-performance analog and mixed-signal components for wireless, automotive, and industrial markets.

The Si86S6xx/Lxx family-including SI86SL41HC-IS1-is engineered for high-noise, high-voltage isolation in automotive electrification and industrial automation, emphasizing safety certification, timing precision, and long-term reliability.

FAQ

What is the isolation voltage rating of SI86SL41HC-IS1, and which standards does it meet?

SI86SL41HC-IS1 provides 6000 VRMS isolation for 1 minute per UL 1577 and reinforced insulation per VDE 60747-17, CSA 62368-1, and CQC GB4943.1. This rating is validated for the WB SOIC-16 package and enables use in high-voltage automotive subsystems such as battery packs and inverters where creepage and clearance must exceed 8.3 mm.

Does SI86SL41HC-IS1 support isolated SPI communication?

Yes, SI86SL41HC-IS1 supports isolated SPI through its four independent unidirectional channels-configured as MISO/MOSI/CLK/CS paths across the isolation barrier. While not a dedicated SPI isolator like Si86SS41, its channel flexibility and 150 Mbps speed allow robust implementation of isolated SPI interfaces in BMS and OBC controllers.

What is the purpose of the EN1 and EN2 pins on SI86SL41HC-IS1?

EN1 and EN2 are active-high output enable pins controlling all outputs on Side A and Side B respectively. When asserted, they enable normal signal transmission; when deasserted, they place corresponding outputs in high-impedance state-enabling bus sharing, power sequencing, and safe shutdown in automotive applications using SI86SL41HC-IS1.

How does the fail-safe mode function on SI86SL41HC-IS1?

SI86SL41HC-IS1 offers ordering-selectable fail-safe behavior: when VDD1 is unpowered but VDD2 remains active, outputs default to either logic high or low based on part variant. This prevents undefined states in safety-critical paths-for example, holding gate driver disable signals active during MCU brownout in a traction inverter using SI86SL41HC-IS1.

Is SI86SL41HC-IS1 compatible with 3.3 V and 5 V logic systems?

Yes, SI86SL41HC-IS1 operates across 2.25–5.5 V on both sides, making it fully compatible with 3.3 V microcontrollers and 5 V peripheral interfaces. Its CMOS/Schmitt-trigger inputs accept standard logic thresholds (VIH = 0.7×VDD, VIL = 0.3×VDD), and output drive strength (±10 mA) supports direct connection to most digital loads without external buffers.