Skyworks Solutions Inc. SI86S620FC-AS

Overview

SI86S620FC-AS from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features Schmitt-trigger inputs, selectable fail-safe output (default low), and operates across 2.25–5.5 V supply rails. Used in battery management systems and traction inverters where galvanic separation and noise immunity are critical.

For engineers reviewing the SI86S620FC-AS datasheet, SI86S620FC-AS pinout, SI86S620FC-AS application, or SI86S620FC-AS equivalent, this page delivers verified electrical specs, isolation barrier timing behavior, fail-safe mode configuration, and automotive-grade safety certification details required for high-reliability powertrain and charging system design.

Technical Context

The SI86S620FC-AS 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 independent UVLO and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.

It integrates input deglitch filters (36 ns) to suppress sub-pulse noise, delivers 10 ns typical propagation delay with ≤4.5 ns pulse width distortion, and achieves 100 kV/µs common-mode transient immunity (CMTI) at ±1500 V common-mode voltage swing-critical for motor control gate drivers and isolated ADC interfaces.

Key Specifications

Pinout & Package

SI86S620FC-AS uses an NB SOIC-8 package (3.9 mm creepage/clearance) with 6 active pins and 2 ground pins. Pin 3 (NC) must remain unconnected. Side A (pins 1–4) and Side B (pins 5–8) are fully isolated, supporting asymmetric supply configurations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM220N0BRZ-RL7 and ISO7721FDWR, SI86S620FC-AS uniquely combines AEC-Q100 Grade 0, 6000 VRMS reinforced isolation, factory-set default-low fail-safe, and integrated 36 ns input deglitching-making it the only option qualified for functional safety-critical automotive battery and inverter subsystems.

Availability

SI86S620FC-AS 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, long-term lifecycle support, and automotive-grade traceability.

Supply support for SI86S620FC-AS 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 connectivity solutions, with leadership in RF, timing, and isolation technologies.

The Si86S6xx family was designed specifically for automotive and industrial applications demanding reinforced isolation, high CMTI, and AEC-Q100 reliability-targeting battery systems, motor drives, and high-voltage power conversion.

FAQ

What is the isolation voltage rating of SI86S620FC-AS and which standards does it meet?

SI86S620FC-AS is rated for 6000 VRMS isolation per UL 1577 and reinforced insulation per IEC 60747-17, VDE 60747-17, CSA 62368-1, and CQC GB4943.1. It achieves 2121 Vpeak working voltage in SSO-8 and 630 Vpeak in NB SOIC-8 packages. These certifications validate its use in medical and automotive systems requiring two means of patient protection (2 MOPP) or reinforced insulation.

Does SI86S620FC-AS require external bypass capacitors, and if so, what values?

Yes, SI86S620FC-AS requires 0.1 µF and 10 µF bypass capacitors between VDD1–GND1 and VDD2–GND2. These must be placed as close as possible to the respective supply pins to suppress high-frequency noise and ensure stable operation during fast switching events. The 0.1 µF capacitor handles RF transients while the 10 µF bulk capacitor sustains supply during current surges.

How does the fail-safe default-low mode function in SI86S620FC-AS during power loss?

In SI86S620FC-AS, the default-low fail-safe mode forces B1 and B2 outputs to logic low when VDD1 drops below UVLO– (2.05 V). This occurs within 300 µs of power loss and is enforced by internal 100 kΩ pulldown resistors during startup. The behavior is factory-configured and ensures predictable shutdown in BMS overvoltage detection circuits without external components.

What is the maximum data rate supported by SI86S620FC-AS, and how does it vary with supply voltage?

SI86S620FC-AS supports up to 150 Mbps across its full operating supply range (2.25–5.5 V) at temperatures from –40 to +125 °C. Unlike lower-speed variants (e.g., Si86S62xF), the "B" suffix denotes high-speed operation. Performance is maintained at 3.3 V and 5.0 V supplies, with identical timing specs including 10 ns typical propagation delay and ≤4.5 ns pulse width distortion.

Can SI86S620FC-AS be used in systems requiring IEC 61000-4-5 surge protection?

SI86S620FC-AS itself is not a surge protection device, but its 6000 VRMS isolation rating and 8484 Vpeak surge withstand voltage (VIOSM) per IEC 60747-17 make it suitable for placement downstream of properly designed IEC 61000-4-5 compliant TVS/clamp circuits. It provides the galvanic barrier needed to protect low-voltage control circuitry from surge energy coupled into isolated interfaces.