Skyworks Solutions Inc. SI86S662EC-IS1R

Overview

SI86S662EC-IS1R from Skyworks Solutions is a 6-channel, reinforced-isolation digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and dual 2.25–5.5 V supply operation. It features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, selectable fail-safe (default high/low), and operates across –40 to 125 °C for automotive and industrial systems requiring robust signal integrity across high-noise power domains.

For engineers reviewing the SI86S662EC-IS1R datasheet, SI86S662EC-IS1R pinout, SI86S662EC-IS1R application, or SI86S662EC-IS1R equivalent, key selection criteria include its 6-channel bidirectional isolation capability, 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, and WB SOIC-16 package with reinforced IEC 60747-17 certification - critical for onboard chargers, motor control, and isolated ADC/DAC interfaces.

Technical Context

The SI86S662EC-IS1R implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing without clock recovery circuits. Its architecture supports independent UVLO and reset per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.

It delivers precise timing performance: 10 ns typical propagation delay, 3.5 ns pulse width distortion, and 100 kV/µs common-mode transient immunity. The device includes tri-state output control via EN1/EN2 pins and supports fail-safe default states (high or low) during unpowered conditions - configurable by ordering option.

Key Specifications

Pinout & Package

SI86S662EC-IS1R 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; the isolation barrier separates Side A (pins 1–8) and Side B (pins 9–16).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6601ARIZ-RL and ISO6760FDWR, SI86S662EC-IS1R delivers higher isolation (6000 VRMS), faster data rate (150 Mbps), and AEC-Q100 qualification - making it uniquely suited for automotive OBCs and high-performance motor drives where timing fidelity and safety certification are non-negotiable.

Availability

SI86S662EC-IS1R is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for SI86S662EC-IS1R 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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.

The SI86S6xx family was designed specifically for high-reliability, high-speed digital isolation in safety-critical automotive and industrial power systems - emphasizing reinforced insulation, AEC-Q100 compliance, and RF-based timing precision.

FAQ

What is the isolation voltage rating of the SI86S662EC-IS1R?

The SI86S662EC-IS1R is rated for 6000 VRMS isolation for 1 minute per UL 1577 and certified to IEC 60747-17 for reinforced insulation. This rating applies to the WB SOIC-16 package and is validated for continuous working voltage up to 1140 V peak in end-system safety standards such as IEC 62368-1 and IEC 60601-1. SI86S662EC-IS1R maintains this rating across its full operating temperature range of –40 to 125 °C.

Does the SI86S662EC-IS1R require external startup initialization or configuration?

No, the SI86S662EC-IS1R uses an RF on/off keying architecture that requires no startup initialization or configuration. Outputs become valid within 0.3 ms after VDD1 and VDD2 exceed their respective UVLO+ thresholds (2.18 V typical). SI86S662EC-IS1R enters normal operation immediately - no firmware handshake, clock training, or register programming is needed.

What fail-safe behavior does the SI86S662EC-IS1R exhibit during loss of input-side power?

The SI86S662EC-IS1R offers a selectable fail-safe mode determined by ordering option: either default-high or default-low output state when VDD1 is unpowered but VDD2 remains active. This behavior is implemented via internal circuitry that holds outputs at the configured logic level - ensuring predictable system response during brownout or controller failure. SI86S662EC-IS1R does not float or enter high-impedance state in this condition.

Can the SI86S662EC-IS1R support SPI communication between isolated domains?

Yes, the SI86S662EC-IS1R supports SPI isolation by assigning dedicated channels to MOSI, MISO, SCLK, CS, and auxiliary signals (e.g., INT, READY). Its 150 Mbps data rate and 10 ns propagation delay preserve timing integrity at SPI clock frequencies up to 20 MHz. SI86S662EC-IS1R's Schmitt-trigger inputs reject high-frequency noise common in motor-drive environments, eliminating need for external filtering on SPI lines.

What is the common-mode transient immunity (CMTI) specification for the SI86S662EC-IS1R?

The SI86S662EC-IS1R guarantees ≥100 kV/µs common-mode transient immunity (CMTI), measured per JEDEC standard JESD22-A114. This performance is achieved through RF modulation architecture and optimized layout - enabling reliable operation in high-dV/dt applications such as SiC/GaN-based traction inverters and isolated gate driver interfaces where transients exceed 50 kV/µs.