Skyworks Solutions Inc. SI86S662BB-IUR

Overview

SI86S662BB-IUR from Skyworks Solutions is a six-channel, bidirectional digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features dual supply operation (2.25–5.5 V), 10 ns typical propagation delay, and fail-safe output configuration (default low) for isolated motor control, battery management, and traction inverter interfaces.

For engineers reviewing the SI86S662BB-IUR datasheet, SI86S662BB-IUR pinout, SI86S662BB-IUR application, or SI86S662BB-IUR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in EV powertrain systems, and validated alternative options aligned with IEC 60747-17 and UL 1577 safety requirements.

Technical Context

The SI86S662BB-IUR implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing with no clock recovery circuitry. Its architecture supports independent side-A and side-B undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V) and reset thresholds (RSTB+ ≈ 1.7 V), ensuring robust behavior during supply transients in high-noise automotive environments.

All six channels are bidirectional and configurable via external enable pins (EN1/EN2), with tri-state outputs and Schmitt-trigger + CMOS threshold inputs for >100 kV/µs transient immunity. The device operates across –40 to 125 °C and supports fail-safe default-low output state during unpowered conditions on either side.

Key Specifications

Pinout & Package

SI86S662BB-IUR uses a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance) with 6.0 kVRMS isolation capability. Pin assignments follow Figure 4 (Si86S66x) in the datasheet, with side-A and side-B I/O separated by an internal semiconductor isolation barrier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6601ARIZ-RL and ISO6760FDWER, SI86S662BB-IUR uniquely combines 150 Mbps speed, 6000 VRMS isolation, AEC-Q100 qualification, and 100 kV/µs CMTI-making it the only option suitable for ASIL-D-relevant signal paths in 800 V battery electric vehicle powertrains.

Availability

SI86S662BB-IUR is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and traction inverters requiring stable component supply across automotive production lifecycles.

Supply support for SI86S662BB-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 high-performance analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.

The Si86S6xx family was designed specifically for high-reliability automotive and industrial isolation, emphasizing reinforced safety certification, wide temperature operation, and noise-immune RF-based signal transfer.

FAQ

What is the isolation voltage rating of SI86S662BB-IUR and which safety standards does it meet?

SI86S662BB-IUR provides 6000 VRMS isolation for 1 minute per UL 1577 and reinforced insulation per IEC 60747-17. It is certified to CSA 62368-1 and 60601-1, and CQC GB4943.1. These ratings are validated for the WB SOIC-16 package and apply directly to SI86S662BB-IUR without derating in standard PCB layouts meeting minimum creepage requirements.

Does SI86S662BB-IUR require external components for stable operation?

Yes, SI86S662BB-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 pins. No pull-up/down resistors are needed on I/O pins due to built-in Schmitt triggers and CMOS thresholds, but series termination (50–300 Ω) is recommended for >50 MHz signals on long traces.

How does the fail-safe mode function in SI86S662BB-IUR?

SI86S662BB-IUR is ordered with default-low fail-safe mode (indicated by "B" in the part number). When VDD1 drops below UVLO– (2.05 V), all B-side outputs transition to logic low within 0.3 ms and remain low until VDD1 recovers above UVLO+ (2.18 V), preventing unsafe activation of downstream gate drivers or relays.

Can SI86S662BB-IUR support bidirectional communication on all six channels simultaneously?

Yes, SI86S662BB-IUR supports full bidirectional operation on all six channels without direction control pins. Each channel independently transmits and receives using RF modulation/demodulation across the isolation barrier, enabling simultaneous isolated UART, SPI, or custom protocol traffic on all A1–A6/B1–B6 pairs.

What is the maximum ambient temperature for continuous operation of SI86S662BB-IUR?

SI86S662BB-IUR is rated for continuous operation from –40 to 125 °C ambient temperature. This range is validated under full load (all six channels active at 150 Mbps, 5 V supplies) and accounts for self-heating; junction temperature remains ≤150 °C per absolute maximum ratings in the datasheet.