Skyworks Solutions Inc. SI86S663BB-IUR

Overview

SI86S663BB-IUR from Skyworks Solutions is a 6-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It delivers DC to 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating in a WB SOIC-16 package. It operates from 2.25–5.5 V supplies on both sides and supports fail-safe default-high output mode - used in isolated motor control gate drivers and battery management system communication interfaces.

For engineers reviewing the SI86S663BB-IUR datasheet, SI86S663BB-IUR pinout, SI86S663BB-IUR application, or SI86S663BB-IUR equivalent, key selection criteria include reinforced IEC 60747-17 certification, AEC-Q100 qualification for automotive use, tri-state output enable control, and precise timing performance under –40 to +125 °C ambient conditions.

Technical Context

The SI86S663BB-IUR implements RF-based on/off keying modulation across its isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI) without optical degradation concerns. Its architecture integrates six independent CMOS/Schmitt-trigger input channels with side-specific enable pins (EN1/EN2) and supports fail-safe output state selection during supply loss.

Each channel features matched 50 Ω output impedance, 3.5 ns typical pulse width distortion, and undervoltage lockout (UVLO) with 2.10–2.25 V rising threshold per side. The device includes internal 100 kΩ weak pulldown on unpowered outputs and supports sleep-mode entry via external control for low-power operation.

Key Specifications

Pinout & Package

SI86S663BB-IUR is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced isolation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention with GND1 and GND2 on opposite sides of the isolation barrier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6603ARIZ-RL and ISO6763RQWR, SI86S663BB-IUR provides higher data rate (150 vs. 50 Mbps), superior isolation (6000 vs. ≤5000 VRMS), and automotive qualification - making it the only option suitable for high-speed, safety-critical EV subsystems.

Availability

SI86S663BB-IUR is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and isolated power supply designs requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for SI86S663BB-IUR 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 markets.

The Si86S6xx family was designed specifically for automotive and industrial applications demanding reinforced isolation, high-speed data integrity, and extended temperature operation - targeting traction inverters, onboard chargers, and factory automation systems.

FAQ

What is the isolation voltage rating of SI86S663BB-IUR and which safety standards does it meet?

SI86S663BB-IUR is rated for 6000 VRMS isolation per UL 1577 for 1 minute and carries reinforced insulation certification per IEC 60747-17, CSA 62368-1, and CQC GB4943.1. These approvals validate its use in safety-critical automotive and medical systems where galvanic separation must withstand sustained high-voltage stress and transient surges without breakdown.

Does SI86S663BB-IUR require external components for stable operation?

Yes, SI86S663BB-IUR requires 0.1 µF and 10 µF bypass capacitors on both VDD1–GND1 and VDD2–GND2 pairs, placed as close as possible to the package pins. These capacitors stabilize supply rails during high-speed switching and suppress noise coupling across the isolation barrier - omission risks timing jitter and increased EMI susceptibility.

How does the fail-safe mode function in SI86S663BB-IUR during power loss?

SI86S663BB-IUR implements a selectable fail-safe mode where outputs default to logic high when either VDD1 or VDD2 drops below UVLO threshold. This behavior is fixed per ordering option ('B' suffix indicates default-high). It ensures predictable state retention in safety-critical paths like gate driver enable lines during brownout conditions.

Can SI86S663BB-IUR support bidirectional communication on individual channels?

No - SI86S663BB-IUR provides six unidirectional channels (A1→B1 through A6→B6). For bidirectional data transfer, external direction control logic or a separate isolator like Si86SQ44 is required. Each channel's signal path is fixed and cannot be reversed in hardware or firmware.

Is SI86S663BB-IUR qualified for automotive applications and what documentation is available?

Yes, SI86S663BB-IUR is AEC-Q100 Grade 1 qualified (–40 to +125 °C) and supported with AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and full automotive-grade manufacturing flow validation - enabling direct use in EV traction inverters and onboard chargers without additional qualification effort.