Skyworks Solutions Inc. SI86S663BE-AS2R

Overview

SI86S663BE-AS2R from Skyworks Solutions is a 6-channel reinforced digital isolator with 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 default-low output mode. It is used in battery management systems and traction inverters to isolate high-voltage control signals from low-voltage MCU domains.

For engineers reviewing the SI86S663BE-AS2R datasheet, SI86S663BE-AS2R pinout, SI86S663BE-AS2R application, or SI86S663BE-AS2R equivalent, key selection criteria include reinforced IEC 60747-17 certification, 125 °C operating temperature, tri-state outputs with EN1/EN2 control, and WB SOIC-16 package with 8.3 mm creepage.

Technical Context

The SI86S663BE-AS2R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity. Its architecture supports independent UVLO monitoring per side (VDD1/VDD2), RSTB reset thresholds (~1.7 V), and fail-safe output behavior during unpowered conditions.

It integrates Schmitt-trigger inputs with 0.15×VDD hysteresis and CMOS thresholds, delivers 50 Ω nominal output impedance, and supports sleep mode via external SMb pin-though this variant lacks SMb (confirmed by OPN suffix "BE" and pinout Figure 4). All six channels are unidirectional (A→B), with no DIR or SPI functionality.

Key Specifications

Pinout & Package

SI86S663BE-AS2R uses a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, certified for 6000 VRMS isolation per UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6603ARIZ-RL and ISO6763RQWR, SI86S663BE-AS2R uniquely combines AEC-Q100 Grade 1, 6000 VRMS reinforced isolation, 150 Mbps speed, and programmable fail-safe default-low-making it the only drop-in solution for ASIL-B/C traction inverter signal chains requiring guaranteed safe state on power loss.

Availability

SI86S663BE-AS2R 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 SI86S663BE-AS2R 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 for wireless, automotive, and industrial markets.

The Si86S6xx family was designed specifically for high-reliability automotive and industrial isolation, emphasizing reinforced safety certification, extended temperature operation, and RF-based noise immunity over legacy capacitive or magnetic isolators.

FAQ

What is the isolation rating and safety certification status of SI86S663BE-AS2R?

SI86S663BE-AS2R provides 6000 VRMS reinforced isolation per UL 1577 and is certified to IEC 60747-17, CSA 62368-1/60601-1, and CQC GB4943.1. These approvals are fully documented in Skyworks' safety file 206553B and apply directly to the SI86S663BE-AS2R WB SOIC-16 package configuration.

Does SI86S663BE-AS2R support bidirectional data flow or SPI protocol?

No. SI86S663BE-AS2R is a fixed unidirectional 6-channel isolator (A→B only) with no DIR pin, SPI interface pins (MCSb/MCLK/MO/MI), or QSPI functionality. Its pinout matches Figure 4 for Si86S66x devices and excludes all direction-control or protocol-specific signals found in Si86SQ44 or Si86SS51 variants.

What is the function of EN1 and EN2 pins on SI86S663BE-AS2R?

EN1 and EN2 are active-high output enable pins controlling all six outputs on Side A and Side B respectively. When low, they place corresponding outputs in high-impedance state-enabling shared bus architectures and power sequencing in multi-isolator systems. Both pins tolerate 0–5.5 V and require no external pull-ups.

Is SI86S663BE-AS2R compatible with 3.3 V and 5 V logic systems?

Yes. SI86S663BE-AS2R operates across 2.25–5.5 V on both VDD1 and VDD2, supporting direct interfacing with 3.3 V MCUs and 5 V peripheral logic. Input thresholds scale with VDD (VIH = 0.7×VDD, VIL = 0.3×VDD), and outputs drive to VOH ≥ VDD–0.4 V and VOL ≤ 0.4 V across the full supply range.

What packaging and creepage specifications apply to SI86S663BE-AS2R?

SI86S663BE-AS2R uses a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance. This mechanical configuration enables its 6000 VRMS UL 1577 rating and satisfies reinforced insulation requirements for 800 V battery systems per IEC 62368-1 Annex GG.