Skyworks Solutions Inc. SI86S640HC-IS1

Overview

SI86S640HC-IS1 from Skyworks Solutions is a 4-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features bidirectional channel configuration, Schmitt-trigger inputs, and selectable fail-safe output (default low) for isolated communication in battery management and traction inverters.

For engineers reviewing the SI86S640HC-IS1 datasheet, SI86S640HC-IS1 pinout, SI86S640HC-IS1 application, or SI86S640HC-IS1 equivalent, this page delivers verified specifications, validated pin functions, automotive-grade safety certifications (VDE 60747-17, UL 1577), and real-world use context for high-reliability isolated signal transfer.

Technical Context

The SI86S640HC-IS1 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing. Its architecture supports independent UVLO monitoring per side (VDD1/VDD2), RSTB reset thresholds (~1.7 V), and fail-safe operation during unpowered input conditions.

It integrates tri-state outputs controlled by EN1/EN2 pins, 36 ns input deglitch filtering, and CMOS/Schmitt-trigger hybrid input thresholds for noise immunity up to 100 kV/µs. The device operates across –40 to 125 °C with 2.25–5.5 V dual-supply flexibility and no external components beyond 0.1 µF + 10 µF bypass capacitors.

Key Specifications

Pinout & Package

SI86S640HC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin numbering follows standard SOIC-16 layout with isolation barrier between Side A (pins 1–8) and Side B (pins 9–16).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4402BRWZ and ISO7741FDWR, SI86S640HC-IS1 delivers higher isolation voltage (6000 vs. 5000 VRMS), faster data throughput (150 vs. 100 Mbps), and full AEC-Q100 Grade 0 qualification - making it the only option certified for under-hood BEV traction inverter gate drive isolation.

Availability

SI86S640HC-IS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply with automotive-grade lifecycle assurance.

Supply support for SI86S640HC-IS1 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 automotive and industrial isolation, emphasizing reinforced safety certification, extended temperature operation, and RF-based timing determinism over legacy optocoupler or capacitive alternatives.

FAQ

What is the isolation voltage rating of SI86S640HC-IS1 and which safety standards does it meet?

SI86S640HC-IS1 has a 6000 VRMS isolation rating per UL 1577 for 1 minute and is certified to VDE 60747-17 (reinforced insulation), CSA 62368-1, and CQC GB4943.1. These approvals validate its use in medical (60601-1) and industrial (62368-1) safety-critical systems. SI86S640HC-IS1's wide-body SOIC-16 package provides the required creepage and clearance distances to sustain this rating.

Does SI86S640HC-IS1 require external components for basic operation?

Yes, SI86S640HC-IS1 requires two bypass capacitors per side: a 0.1 µF ceramic capacitor and a 10 µF bulk capacitor placed between VDD1/GND1 and VDD2/GND2, respectively. These must be located as close as possible to the pins. No pull-up/down resistors or level shifters are needed due to its CMOS/Schmitt-trigger inputs and 2.25–5.5 V supply range. SI86S640HC-IS1 does not require initialization firmware or configuration registers.

How does the fail-safe mode function on SI86S640HC-IS1?

SI86S640HC-IS1 is ordered with default-low fail-safe mode (indicated by "HC" suffix). When VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic low - preventing undefined states in downstream logic during brownout or power sequencing events. This behavior is hardwired and does not require external circuitry. SI86S640HC-IS1's UVLO and RSTB circuits ensure clean transitions during power-up and shutdown.

What is the purpose of the 36 ns input deglitch filter in SI86S640HC-IS1?

The 36 ns input deglitch filter in SI86S640HC-IS1 suppresses transient noise pulses shorter than 36 ns on A1–A4 and B1–B4 inputs, preventing false edge detection in electrically noisy environments such as motor drives and switch-mode power supplies. Input pulses ≥36 ns pass through with a fixed 36 ns delay; shorter pulses are fully rejected. This feature is factory-configured and cannot be disabled. SI86S640HC-IS1 maintains full 150 Mbps data rate for valid signals.

Can SI86S640HC-IS1 be used in SPI isolation applications?

Yes, SI86S640HC-IS1 supports SPI isolation by assigning A1–A4 and B1–B4 as MOSI, MISO, SCLK, and CS signals across the isolation barrier. While it lacks dedicated SPI control pins (e.g., no MCSb/MO/MI), its four independent bidirectional channels allow full-duplex or half-duplex SPI implementation with external direction control. For integrated SPI functionality, Skyworks' Si86SS41/51 is recommended - but SI86S640HC-IS1 remains viable for custom SPI designs requiring 6000 VRMS and AEC-Q100 compliance.