Skyworks Solutions Inc. SI86S641HC-AS1R

Overview

SI86S641HC-AS1R from Skyworks Solutions is a 4-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It supports DC to 150 Mbps data rates, delivers 10 ns typical propagation delay, and provides 6000 VRMS isolation rating in a WB SOIC-16 package. It operates from 2.25–5.5 V supplies and is AEC-Q100 qualified for automotive battery management systems.

For engineers reviewing the SI86S641HC-AS1R datasheet, SI86S641HC-AS1R pinout, SI86S641HC-AS1R application, or SI86S641HC-AS1R equivalent, key selection criteria include fail-safe output configuration (default-high), 36 ns input deglitch filtering, reinforced IEC 60747-17 certification, and compatibility with isolated SPI peripheral interfaces in high-noise motor control environments.

Technical Context

The SI86S641HC-AS1R implements RF-based on/off keying modulation across its isolation barrier-eliminating startup initialization and enabling robust noise immunity up to 100 kV/µs transient immunity. Its architecture includes Schmitt-trigger + CMOS threshold inputs and tri-state outputs controlled by EN1/EN2 enable pins.

This variant belongs to the Si86S64x subfamily and features four unidirectional channels (A1–A4 to B1–B4), no direction control pin, and integrated 36 ns input deglitch filters on all inputs. It uses separate VDD1/GND1 and VDD2/GND2 supplies with independent UVLO and reset circuitry per side.

Key Specifications

Pinout & Package

SI86S641HC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage/clearance, supporting 6000 VRMS reinforced isolation per UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4401BRWZ and ISO6741FDWR, SI86S641HC-AS1R delivers higher isolation voltage, integrated deglitching, and programmable fail-safe behavior-making it suitable for next-generation EV battery monitors and high-density industrial servo drives where signal integrity and safety certification are non-negotiable.

Availability

SI86S641HC-AS1R is available at Aetrix Electronics and suitable for automotive battery management systems, industrial motor control inverters, and isolated switch-mode power supplies requiring stable component supply across extended product lifecycles.

Supply support for SI86S641HC-AS1R 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-reliability applications.

The Si86S6xx family was designed specifically for automotive and industrial systems demanding reinforced isolation, high-speed data integrity, and long-term reliability under harsh thermal and EMI conditions.

FAQ

What is the isolation voltage rating of the SI86S641HC-AS1R?

The SI86S641HC-AS1R is rated for 6000 VRMS isolation per UL 1577 for one minute, with reinforced insulation certified to IEC 60747-17, CSA 62368-1, and CQC GB4943.1. This rating applies specifically to the WB SOIC-16 package variant and supports high-voltage applications such as onboard chargers and traction inverters where creepage and clearance must meet stringent safety standards. SI86S641HC-AS1R maintains this rating across its full operating temperature range of –40 to +125 °C.

Does the SI86S641HC-AS1R support fail-safe operation, and how is it configured?

Yes, the SI86S641HC-AS1R is ordered with default-high fail-safe behavior, meaning outputs B1–B4 drive logic-high when VDD1 is unpowered but VDD2 remains active. This behavior is fixed by the ordering code suffix "HC" and cannot be changed in-circuit. The device uses internal UVLO and reset circuitry to ensure deterministic output states during brownout events-critical for fault signaling in battery management systems. SI86S641HC-AS1R implements this without external components or configuration registers.

What is the purpose of the 36 ns input deglitch filter in the SI86S641HC-AS1R?

The 36 ns input deglitch filter in the SI86S641HC-AS1R removes narrow noise pulses-such as those induced by EFT bursts or switching transients-from A1–A4 inputs before they propagate across the isolation barrier. Any input pulse narrower than 36 ns is suppressed; wider pulses pass with a fixed 36 ns delay. This feature is factory-configured and active at power-on, eliminating the need for external RC filters in industrial PLC I/O modules or automotive sensor interfaces. SI86S641HC-AS1R relies on this hardware filter to maintain signal integrity in noisy 48 V or 400 V system environments.

Can the SI86S641HC-AS1R be used in SPI isolation applications?

Yes, the SI86S641HC-AS1R supports isolated SPI communication by assigning A1–A4 and B1–B4 to MOSI, MISO, SCLK, and CS signals-though it lacks dedicated SPI control pins like MCSb or SCSb found in the Si86SSx series. Its 150 Mbps data rate and 10 ns propagation delay enable reliable full-duplex SPI operation up to 37.5 MHz clock frequency. SI86S641HC-AS1R is commonly deployed in cost-optimized isolated ADC/DAC interfaces where discrete channel assignment suffices and direction control is managed externally.

Is the SI86S641HC-AS1R AEC-Q100 qualified, and what grade does it meet?

Yes, the SI86S641HC-AS1R is AEC-Q100 qualified to Grade 1, specifying operation from –40 to +125 °C ambient temperature with full electrical characterization across that range. This qualification covers stress testing for accelerated environmental, thermal, and reliability conditions required for automotive powertrain and chassis applications. SI86S641HC-AS1R achieves this through automotive-specific manufacturing flows, lot traceability, and failure analysis protocols-making it suitable for battery management systems and onboard chargers in BEV/HEV platforms.