Skyworks Solutions Inc. SI86S663EC-AS1R

Overview

SI86S663EC-AS1R from Skyworks Solutions is a 6-channel reinforced digital isolator with bidirectional signal isolation across a semiconductor-based barrier, supporting up to 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating. It operates from 2.25–5.5 V supplies on both sides and features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, and selectable fail-safe default-high output mode - deployed in battery management systems and traction inverters.

For engineers reviewing the SI86S663EC-AS1R datasheet, SI86S663EC-AS1R pinout, SI86S663EC-AS1R application, or SI86S663EC-AS1R equivalent, key selection considerations include its 6-channel configuration, WB SOIC-16 package with 8.3 mm creepage, AEC-Q100 qualification, and support for industrial and automotive isolated communication interfaces including SPI and digital I/O bridging.

Technical Context

The SI86S663EC-AS1R implements RF-based on/off keying modulation across a monolithic silicon isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI) without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) and reset circuits per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.

All six channels are unidirectional (three A→B, three B→A), with dedicated EN1/EN2 pins enabling tri-state control per side. The device integrates internal 50 Ω output impedance drivers and requires only 0.1 µF + 10 µF bypass capacitors per supply rail - no external transformers or timing components needed.

Key Specifications

Pinout & Package

SI86S663EC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, optimized for 6000 VRMS reinforced insulation. Pin numbering follows standard SOIC-16 layout with isolation barrier between pins 1–8 (Side A) and 9–16 (Side B).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6603ARIZ-RL and ISO6763RQWR, SI86S663EC-AS1R delivers higher speed, reinforced 6000 VRMS isolation, and AEC-Q100 qualification - making it the only option suitable for time-critical automotive traction inverter gate drive signaling.

Availability

SI86S663EC-AS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, industrial PLC modules, and isolated SPI interfaces requiring stable component supply across automotive and industrial design cycles.

Supply support for SI86S663EC-AS1R 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-reliability applications.

The Si86S6xx family is engineered for high-speed, reinforced digital isolation in automotive and industrial systems - delivering RF-based reliability, AEC-Q100 compliance, and safety certifications required for EV powertrain and medical electronics.

FAQ

What is the isolation voltage rating of the SI86S663EC-AS1R?

The SI86S663EC-AS1R is rated for 6000 VRMS isolation for 1 minute per UL 1577 and certified to IEC 60747-17 for reinforced insulation. This rating applies specifically to the WB SOIC-16 package variant and enables use in high-voltage battery systems and industrial motor drives where creepage and clearance must exceed 8 mm.

Does the SI86S663EC-AS1R require external components for basic operation?

No, the SI86S663EC-AS1R requires only two bypass capacitors per side: 0.1 µF ceramic and 10 µF bulk capacitor placed near VDD1/GND1 and VDD2/GND2. Unlike optocouplers or transformer-based isolators, it needs no external resistors, level shifters, or clock sources - simplifying PCB layout and reducing BOM count.

How does the fail-safe mode work on the SI86S663EC-AS1R?

The SI86S663EC-AS1R uses ordering code "EC" to specify default-high fail-safe behavior: when VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic high. This is implemented via internal circuitry that overrides input states during undervoltage conditions - critical for maintaining safe states in BMS fault detection paths.

Is the SI86S663EC-AS1R pin-compatible with other Si86S6xx variants?

Yes, all Si86S6xx devices in WB SOIC-16 share identical pinout and footprint, including SI86S660, SI86S661, SI86S662, and SI86S663. Channel direction (forward/reverse count) and fail-safe option (EC vs. ED) are factory-configured; electrical and mechanical compatibility is maintained across the series.

What safety certifications apply to the SI86S663EC-AS1R?

The SI86S663EC-AS1R holds pending UL 1577 (6000 VRMS), VDE 60747-17 (reinforced), CSA 62368-1 and 60601-1, and CQC GB4943.1 certifications. It is also AEC-Q100 Grade 1 qualified, with manufacturing performed in automotive-specific flows - supporting compliance in EV, medical, and industrial safety-critical designs.