Skyworks Solutions Inc. SI86S641EC-AS1R

Overview

SI86S641EC-AS1R 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 SI86S641EC-AS1R datasheet, SI86S641EC-AS1R pinout, SI86S641EC-AS1R application, or SI86S641EC-AS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, AEC-Q100 qualification, 36 ns input deglitch filtering, –40 to 125 °C operation, and WB SOIC-16 package with 8.3 mm creepage.

Technical Context

The SI86S641EC-AS1R implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing without clock recovery circuits. Its architecture delivers 100 kV/µs CMTI and supports independent UVLO (2.10–2.25 V) and reset thresholds (1.7 V) per side.

It integrates four isolated bidirectional channels with side-specific enable pins (EN1/EN2), configurable fail-safe output state, and 36 ns input noise filters - all within a single WB SOIC-16 package rated for 6000 VRMS withstand voltage per UL 1577 and reinforced insulation per IEC 60747-17.

Key Specifications

Pinout & Package

SI86S641EC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, optimized for 6000 VRMS reinforced isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4401BRWZ and ISO6741FDWR, SI86S641EC-AS1R delivers higher isolation voltage, automotive qualification, and built-in noise filtering - making it the sole choice for next-generation EV battery monitors and high-CMTI motor drives where safety and signal integrity are non-negotiable.

Availability

SI86S641EC-AS1R is available at Aetrix Electronics and suitable for battery management systems, isolated switch mode supplies, and medical data acquisition requiring stable component supply across extended product lifecycles.

Supply support for SI86S641EC-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.

The Si86S6xx family was designed specifically for high-reliability isolation in automotive electrification and industrial power systems, emphasizing reinforced safety certification, high CMTI, and zero-startup-delay operation.

FAQ

What is the isolation voltage rating of SI86S641EC-AS1R and which safety standards does it meet?

SI86S641EC-AS1R is rated for 6000 VRMS isolation for 1 minute per UL 1577 and carries reinforced insulation certification per IEC 60747-17, CSA 62368-1, and CQC GB4943.1. This enables use in high-voltage automotive and medical systems where dual-redundant insulation is mandated. The WB SOIC-16 package provides 8.3 mm creepage to satisfy 2× MOPP requirements in IEC 60601-1 applications.

Does SI86S641EC-AS1R require external configuration or initialization at power-up?

No, SI86S641EC-AS1R requires no start-up initialization due to its RF on/off keying architecture. Outputs become valid within 0.3 ms after VDD exceeds the UVLO threshold (2.10–2.25 V), and the device enters normal operation immediately. This eliminates boot firmware dependencies and simplifies system-level timing in real-time control applications.

What does the "EC" suffix in SI86S641EC-AS1R indicate?

The "EC" suffix denotes the fail-safe output configuration option: default-high output state when the input supply (VDD1) is unpowered but the output supply (VDD2) remains active. This behavior is defined in Table 4 of the datasheet and is critical for safety-critical functions such as fault signaling in battery management systems.

Can SI86S641EC-AS1R support SPI isolation, and how are the pins assigned?

SI86S641EC-AS1R supports standard SPI isolation via its four bidirectional channels: A1/B1 for SCLK, A2/B2 for MOSI, A3/B3 for MISO, and A4/B4 for CS. Unlike dedicated SPI isolators (e.g., Si86SSx), it lacks integrated SPI protocol logic but provides the raw isolated I/O needed for custom SPI implementations with full timing control.

What is the purpose of the 36 ns input deglitch filter in SI86S641EC-AS1R?

The 36 ns input deglitch filter in SI86S641EC-AS1R blocks transient pulses shorter than 36 ns - such as EFT bursts or switching noise - from propagating across the isolation barrier. This prevents false edge detection in sensitive applications like isolated current sensing or encoder feedback, while adding only fixed 36 ns delay to valid signals.