Skyworks Solutions Inc. SI86S660EE-IS2R

Overview

SI86S660EE-IS2R from Skyworks Solutions is a 6-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and dual 2.25–5.5 V supply operation across isolated sides. It features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, selectable fail-safe default-high/low output, and operates from –40 to 125 °C. Used in battery management systems and traction inverters requiring high-noise immunity and safety-certified signal isolation.

For engineers reviewing the SI86S660EE-IS2R datasheet, SI86S660EE-IS2R pinout, SI86S660EE-IS2R application, or SI86S660EE-IS2R equivalent, key selection criteria include reinforced IEC 60747-17 certification, 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, and WB SOIC-16 package compatibility with 8.3 mm creepage/clearance.

Technical Context

The SI86S660EE-IS2R implements RF-based on/off keying modulation 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 delivers six unidirectional isolated channels (A1–A6 → B1–B6), each with 50 Ω nominal output impedance, 0.1 µF + 10 µF bypassing per side, and configurable tri-state control via EN1/EN2 pins. Fail-safe output state is fixed by ordering option (EE = default low) and remains stable during supply brownout transitions.

Key Specifications

Pinout & Package

SI86S660EE-IS2R 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; pin 16 is VDD2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6600ARIZ-RL and ISO6760FRDWR, SI86S660EE-IS2R provides higher data rate (150 vs. 50 Mbps), reinforced 6000 VRMS isolation, and AEC-Q100 Grade 0 qualification - making it uniquely suitable for automotive traction and high-reliability industrial inverters where timing precision and safety certification are mandatory.

Availability

SI86S660EE-IS2R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply across automotive production lifecycles.

Supply support for SI86S660EE-IS2R 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.

The Si86S6xx family is designed for high-reliability signal isolation in automotive and industrial systems demanding reinforced safety certification, high CMTI, and extended temperature operation - specifically targeting EV powertrain and energy infrastructure applications.

FAQ

What is the isolation rating and safety certification status of SI86S660EE-IS2R?

SI86S660EE-IS2R is rated for 6000 VRMS isolation per UL 1577 for 1 minute and carries reinforced insulation certification per IEC 60747-17. It is also compliant with CSA 62368-1 and 60601-1, and CQC GB4943.1. The EE suffix indicates default-low fail-safe behavior during power loss, and the device is AEC-Q100 Grade 0 qualified for automotive use from –40 to 125 °C.

Does SI86S660EE-IS2R require external configuration or initialization at power-up?

No, SI86S660EE-IS2R requires no start-up initialization. Its RF-based on/off keying architecture enables immediate signal transmission after exiting undervoltage lockout (UVLO). Outputs follow inputs within 0.3 ms of VDD crossing the UVLO+ threshold (~2.18 V), with internal 100 kΩ pulldown ensuring defined low state during startup - eliminating firmware dependencies or register writes.

What are the supply voltage and bypass capacitor requirements for SI86S660EE-IS2R?

SI86S660EE-IS2R operates from 2.25 V to 5.5 V on both VDD1 and VDD2 sides. Each supply requires two bypass capacitors: 0.1 µF ceramic placed closest to the pin and 10 µF bulk capacitance. These must be connected between VDD1–GND1 and VDD2–GND2 respectively. Failure to meet this requirement risks increased noise susceptibility and timing jitter in the SI86S660EE-IS2R output signals.

How does the fail-safe mode work on SI86S660EE-IS2R, and how is it configured?

The fail-safe mode on SI86S660EE-IS2R is fixed at time of manufacture. The "EE" in the part number specifies default-low output behavior when either VDD1 or VDD2 falls below UVLO– (~2.05 V). During brownout, outputs enter high-impedance state briefly, then settle to logic low - preventing undefined states in safety-critical paths like BMS contactor control. No external pin or register configures this; it is an ordering-option feature baked into SI86S660EE-IS2R.

Can SI86S660EE-IS2R be used in bidirectional data paths such as isolated SPI or QSPI interfaces?

SI86S660EE-IS2R supports only unidirectional A→B signal flow (A1–A6 to B1–B6). For bidirectional protocols like SPI or QSPI, Skyworks offers dedicated variants: Si86SS51 for isolated SPI (with MISO/MOSI separation) and Si86SQ44 for QSPI (with DIR-controlled channel reversal). Using SI86S660EE-IS2R in bidirectional applications would require external direction logic and additional isolators - making Si86SS51 or Si86SQ44 the appropriate drop-in alternatives.