Skyworks Solutions Inc. SI86S640EE-IS2R

Overview

SI86S640EE-IS2R from Skyworks Solutions is a 4-channel reinforced digital isolator with 6000 VRMS isolation, 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 industrial motor control and isolated ADC interfaces.

For engineers reviewing the SI86S640EE-IS2R datasheet, SI86S640EE-IS2R pinout, SI86S640EE-IS2R application, or SI86S640EE-IS2R equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in battery management and power inverters, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The SI86S640EE-IS2R implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating startup initialization and delivering best-in-class CMTI (>100 kV/µs) and noise immunity. Its architecture supports independent side-A and side-B undervoltage lockout (UVLO) with 2.10–2.25 V thresholds and reset detection at ~1.7 V.

It provides four bidirectional isolated channels with dedicated EN1/EN2 enable inputs per side, 10 ns typical propagation delay, 3.5 ns pulse width distortion, and integrated input deglitch filtering (36 ns) for robust operation in noisy industrial environments.

Key Specifications

Pinout & Package

SI86S640EE-IS2R is housed in a WB SOIC-16 (wide-body) package with 8.3 mm creepage/clearance, supporting 6000 VRMS isolation. Pin assignments follow Figure 2 of the datasheet (Si86S64x/L4x family).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4401BRWZ and ISO6741QDWR, SI86S640EE-IS2R delivers higher isolation (6000 VRMS), faster data rate (150 Mbps), built-in 36 ns deglitching, and AEC-Q100 Grade 0 qualification-making it uniquely suitable for high-reliability automotive traction and industrial servo systems requiring both speed and safety.

Availability

SI86S640EE-IS2R is available at Aetrix Electronics and suitable for industrial motor control, onboard chargers, and traction inverter designs requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.

Supply support for SI86S640EE-IS2R 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 high-performance wireless and power systems.

The Si86S6xx family was designed specifically for high-noise, high-voltage industrial and automotive applications demanding reinforced isolation, ultra-low propagation delay, and AEC-Q100 reliability-targeting battery management, motor drives, and EV charging infrastructure.

FAQ

What is the isolation voltage rating of the SI86S640EE-IS2R?

The SI86S640EE-IS2R is rated for 6000 VRMS isolation for one minute per UL 1577, with reinforced insulation certified to VDE 60747-17, CSA 62368-1, and CQC GB4943.1. This rating applies specifically to its WB SOIC-16 package and enables use in high-voltage systems such as EV traction inverters and industrial SMPS where creepage and clearance must exceed 8 mm.

Does the SI86S640EE-IS2R require external startup configuration or initialization?

No, the SI86S640EE-IS2R uses an RF on/off keying architecture that requires no startup initialization. Outputs become valid within 0.3 ms after VDD rises above the UVLO threshold (2.10–2.25 V), and the device enters normal operation without firmware or register programming - a key advantage over capacitor-based or digital isolators needing calibration sequences.

What does the "EE" suffix indicate in SI86S640EE-IS2R?

The "EE" suffix in SI86S640EE-IS2R denotes the fail-safe option with default-low output behavior during input-side power loss. When VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic low - a critical safety feature for enabling controlled shutdown in battery management systems and motor drives.

Can the SI86S640EE-IS2R be used in SPI isolation applications?

Yes, the SI86S640EE-IS2R supports isolated SPI communication through its four independent bidirectional channels. While not a dedicated SPI isolator like the Si86SS41, it can isolate MOSI, MISO, SCLK, and CS signals with matched propagation delay (<10 ns) and low skew - enabling reliable full-duplex SPI operation up to 150 Mbps in isolated ADC/DAC interfaces.

What is the purpose of the EN1 and EN2 pins on the SI86S640EE-IS2R?

EN1 and EN2 are active-high enable inputs controlling the output drivers on Side A and Side B respectively. When pulled low, they place all associated I/O pins (A1–A4 or B1–B4) into high-impedance state - allowing multiple SI86S640EE-IS2R devices to share a common isolated bus without contention, essential in modular power converter architectures.