Skyworks Solutions Inc. SI86S641BE-AS2R

Overview

SI86S641BE-AS2R from Skyworks Solutions is a 4-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier, supporting up to 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating. It operates from 2.25–5.5 V on both sides and features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, and selectable fail-safe default-high output mode - deployed in battery management systems and isolated ADC interfaces.

For engineers reviewing the SI86S641BE-AS2R datasheet, SI86S641BE-AS2R pinout, SI86S641BE-AS2R application, or SI86S641BE-AS2R equivalent, key selection criteria include reinforced IEC 60747-17 certification, AEC-Q100 qualification for automotive use, 36 ns input deglitch filtering, and compatibility with industrial motor control and onboard charger signal integrity requirements.

Technical Context

The SI86S641BE-AS2R implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI) without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.

This device belongs to the Si86S6xx family's 4-channel forward/reverse configuration variant (A1–A4/B1–B4), with EN1/EN2 active-high output enables, no internal direction control pin, and fixed channel mapping - distinct from QSPI (Si86SQ44) or SPI-dedicated (Si86SS41/51) variants. It includes 36 ns input deglitch filters as specified in ordering option "BE".

Key Specifications

Pinout & Package

SI86S641BE-AS2R uses a WB SOIC-16 (wide-body small-outline integrated circuit) package with 16 pins and creepage/clearance optimized for 6000 VRMS reinforced isolation. Pin 1 is marked via dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4401BRWZ and ISO6741FDWR, SI86S641BE-AS2R delivers higher data rate, stronger noise immunity via deglitching, and full Grade 0 automotive qualification - making it the only option meeting reinforced insulation, 150 Mbps, and under-hood thermal requirements simultaneously.

Availability

SI86S641BE-AS2R is available at Aetrix Electronics and suitable for battery management systems, onboard chargers, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for SI86S641BE-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, with leadership in RF, timing, and isolation technologies for high-reliability applications.

The SI86S6xx family was designed specifically for high-speed, reinforced-isolation signal transfer in automotive and industrial systems - emphasizing AEC-Q100 compliance, 6000 VRMS safety, and RF-based noise resilience over legacy optocoupler architectures.

FAQ

What is the isolation voltage rating of SI86S641BE-AS2R and which safety standards does it meet?

SI86S641BE-AS2R provides 6000 VRMS isolation for 1 minute per UL 1577 and reinforced insulation per IEC 60747-17. It is certified by UL, VDE, CSA, and CQC for 62368-1 and 60601-1 end-equipment standards. The wide-body SOIC-16 package achieves ≥8.3 mm creepage and clearance, satisfying reinforced insulation requirements for 1000 VAC working voltage systems.

Does SI86S641BE-AS2R support fail-safe operation, and how is it configured?

Yes, SI86S641BE-AS2R implements selectable fail-safe mode via its "BE" ordering option, which configures outputs to default high when VDD1 is unpowered but VDD2 remains active. This behavior is hard-coded in silicon and requires no external configuration - ensuring safe state retention during primary-side power loss in battery management and motor control systems.

What is the purpose of the 36 ns input deglitch filter in SI86S641BE-AS2R?

The 36 ns input deglitch filter in SI86S641BE-AS2R removes transient noise pulses shorter than 36 ns from A1–A4 inputs, preventing false triggering in electrically noisy environments such as motor drives and switch-mode power supplies. This eliminates the need for external RC filters while maintaining full 150 Mbps data throughput for valid signals.

How does SI86S641BE-AS2R handle power supply sequencing and undervoltage conditions?

SI86S641BE-AS2R features independent UVLO monitors on VDD1 and VDD2 with thresholds of 2.10–2.25 V (rising) and 1.98–2.12 V (falling), plus dedicated reset detection at ~1.7 V. During VDD ramp-up, outputs remain low for 0.3 ms until stabilization, then transition to the fail-safe default state - ensuring deterministic behavior during asymmetric power sequencing in multi-rail systems.

Is SI86S641BE-AS2R compatible with 3.3 V and 5 V logic families on both sides?

Yes, SI86S641BE-AS2R supports 2.25–5.5 V on both VDD1 and VDD2, enabling direct interfacing with 3.3 V microcontrollers (e.g., ARM Cortex-M) and 5 V analog ICs (e.g., isolated ADCs or gate drivers) without level shifters. Input thresholds scale with VDD (VIH = 0.7×VDDx, VIL = 0.3×VDDx), and output drive strength remains consistent across the full supply range.