Skyworks Solutions Inc. SI86S660BB-IU

Overview

SI86S660BB-IU from Skyworks Solutions is a 6-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and 10 ns typical propagation delay. It features dual-side supply (2.25–5.5 V), Schmitt-trigger + CMOS inputs, tri-state outputs with enable, and fail-safe default-high or default-low output selection. It is used in isolated motor control gate drivers and battery management system signal interfaces.

For engineers reviewing the SI86S660BB-IU datasheet, SI86S660BB-IU pinout, SI86S660BB-IU application, or SI86S660BB-IU equivalent, key selection criteria include reinforced IEC 60747-17 certification, AEC-Q100 qualification for automotive use, 100 kV/µs CMTI, and WB SOIC-16 package compatibility with 8.3 mm creepage/clearance.

Technical Context

The SI86S660BB-IU 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 0.3 ms start-up time and 100 kΩ weak pulldown during unpowered states.

All six channels are bidirectional-capable via external direction control logic, and the device integrates sleep mode (SMb pin) for sub-1 mA quiescent current per side. Fail-safe output state is fixed at manufacture-SI86S660BB-IU specifies default-high behavior during VDD loss on powered side.

Key Specifications

Pinout & Package

SI86S660BB-IU is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and clearance, supporting 6000 VRMS isolation. Pin 1 is marked with a dot; pins 1–8 reside on Side A (input side), pins 9–16 on Side B (output side), with isolation barrier between pins 8 and 9.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4160BRIZ and ISO6760FDWR, SI86S660BB-IU delivers higher data rate, certified reinforced isolation, and deterministic fail-safe behavior-making it optimal for next-generation EV inverters and high-reliability industrial automation where timing, safety, and noise immunity are co-constrained.

Availability

SI86S660BB-IU is available at Aetrix Electronics and suitable for industrial automation systems, automotive battery management systems, and isolated switch-mode power supplies requiring stable component supply across multi-year production cycles.

Supply support for SI86S660BB-IU 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 family was engineered specifically for high-noise, high-reliability applications in automotive traction inverters, industrial motor drives, and medical equipment-delivering RF-based isolation with guaranteed CMTI, timing precision, and safety certification out-of-the-box.

FAQ

What is the isolation voltage rating and safety certification status of SI86S660BB-IU?

SI86S660BB-IU is rated for 6000 VRMS isolation per UL 1577 (1 minute) and carries reinforced insulation certification to IEC 60747-17, CSA 62368-1, and VDE 60747-17. These certifications are fully documented in Skyworks' official safety reports and support end-equipment approvals for industrial, medical, and automotive applications. SI86S660BB-IU meets the reinforced insulation requirement for systems operating up to 1000 VAC working voltage.

Does SI86S660BB-IU support fail-safe output behavior, and how is it configured?

Yes, SI86S660BB-IU includes factory-configured fail-safe output behavior: it defaults to high-output state when VDD1 is unpowered but VDD2 remains active. This configuration is fixed at manufacture and cannot be changed in-circuit. The behavior is verified in Table 4 of the datasheet and ensures safe shutdown of downstream gate drivers during primary-side power loss-critical in motor control and power converter applications.

What package type and creepage distance does SI86S660BB-IU use?

SI86S660BB-IU uses the WB SOIC-16 (wide-body SOIC-16) package with 8.3 mm minimum creepage and clearance distances. This package enables the 6000 VRMS isolation rating and satisfies reinforced insulation requirements for high-voltage applications such as EV onboard chargers and industrial AC drives. The pinout follows standard SOIC-16 mechanical dimensions with pin 1 marked by a dot.

Can SI86S660BB-IU operate with different supply voltages on each side?

Yes, SI86S660BB-IU supports independent 2.25–5.5 V supplies on Side A (VDD1) and Side B (VDD2). This allows interfacing between 3.3 V microcontrollers and 5 V analog subsystems without external level shifters. Each side has its own UVLO and reset circuitry, enabling asymmetric power sequencing-for example, powering Side B before Side A during system startup.

What is the maximum data rate and propagation delay specification for SI86S660BB-IU?

SI86S660BB-IU supports DC to 150 Mbps data rate with 10 ns typical propagation delay and ≤3.5 ns pulse width distortion. These values are measured under standard conditions (VDD = 5.0 V, TA = 25 °C) and maintained across the full operating temperature range (–40 to +125 °C). The low skew and jitter make SI86S660BB-IU suitable for high-speed serial interfaces including isolated SPI, RS-485, and digital encoder feedback.