Skyworks Solutions Inc. SI86SL41HC-IS1R

Overview

SI86SL41HC-IS1R 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, selectable fail-safe default-high/low output, and operates across –40 to 125 °C in WB SOIC-16 package. It is used in battery management systems and onboard chargers requiring high noise immunity and precise timing.

For engineers reviewing the SI86SL41HC-IS1R datasheet, SI86SL41HC-IS1R pinout, SI86SL41HC-IS1R application, or SI86SL41HC-IS1R equivalent, key selection criteria include its 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, 2.25–5.5 V dual-supply operation, and fail-safe mode configuration via ordering option - all critical for isolated SPI, motor control, and traction inverter interfaces.

Technical Context

The SI86SL41HC-IS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports bidirectional signal transfer across four independent channels with side-specific enable (EN1/EN2) and failsafe state control determined at power-up based on supply sequencing and UVLO thresholds.

It integrates undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V) and reset circuitry (RSTB– ≈ 1.7 V) per side, ensuring deterministic behavior during brownout and startup. The device uses internal 50 Ω output impedance drivers and requires only 0.1 µF + 10 µF bypass capacitors per supply rail - no external biasing or termination needed for standard loads.

Key Specifications

Pinout & Package

SI86SL41HC-IS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced insulation. Pin layout follows the Si86S64x/L4x family configuration (Figure 2), with side-A and side-B I/O separated by an internal isolation barrier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM2401ARWZ and ISO6741QDWR, SI86SL41HC-IS1R delivers higher speed (150 Mbps vs ≤50 Mbps), higher isolation (6000 VRMS), AEC-Q100 Grade 0 qualification, and configurable fail-safe behavior - making it uniquely suitable for next-generation EV power electronics and high-reliability medical systems.

Availability

SI86SL41HC-IS1R is available at Aetrix Electronics and suitable for automotive battery management systems, traction inverters, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for SI86SL41HC-IS1R 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 analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies for high-performance wireless and power systems.

The Si86S6xx/Lxx family - including SI86SL41HC-IS1R - was designed specifically for automotive and industrial applications demanding reinforced isolation, high CMTI, low power, and AEC-Q100 compliance in harsh operating environments.

FAQ

What is the isolation voltage rating of SI86SL41HC-IS1R and which safety standards does it meet?

SI86SL41HC-IS1R provides 6000 VRMS reinforced isolation for 1 minute per UL 1577, and is certified to IEC 60747-17 (reinforced), CSA 62368-1/60601-1, and CQC GB4943.1. This rating applies to the WB SOIC-16 package and enables use in high-voltage automotive and medical systems where reinforced insulation is mandated.

Does SI86SL41HC-IS1R require external components for basic operation?

SI86SL41HC-IS1R requires only two bypass capacitors per supply rail: 0.1 µF ceramic + 10 µF bulk capacitor placed close to VDD1/GND1 and VDD2/GND2. No pull-ups, level shifters, or termination resistors are needed for standard 15 pF loads - simplifying layout and reducing BOM count.

How does the fail-safe mode work on SI86SL41HC-IS1R?

SI86SL41HC-IS1R offers factory-configured fail-safe behavior: when VDD1 is unpowered but VDD2 remains active, B1–B4 outputs default to either logic high or low depending on the ordering option (e.g., "H" or "L" suffix). This ensures predictable state during controller-side brownout - critical for safe shutdown in motor drives and BMS.

What is the difference between SI86SL41HC-IS1R and SI86S641HC-IS1R?

SI86SL41HC-IS1R is the low-power variant of the Si86S641HC-IS1R, consuming ~0.25 mA/channel less quiescent current. Both share identical pinout, timing specs (10 ns propagation delay), and isolation rating, but SI86SL41HC-IS1R trades marginal timing performance for reduced power - ideal for thermally constrained automotive modules.

Is SI86SL41HC-IS1R suitable for SPI isolation applications?

SI86SL41HC-IS1R is a general-purpose 4-channel digital isolator and does not integrate dedicated SPI protocol logic (e.g., chip select, clock forwarding). For SPI isolation, Skyworks recommends the pin-compatible SI86SS41HC-IS1R - a purpose-built 4-channel SPI isolator with MCSb/MCLK/MO/MI and SCSb/SCLK/SI/SO pin mapping.