Skyworks Solutions Inc. SI86SL40EC-IS1R

Overview

SI86SL40EC-IS1R from Skyworks Solutions is a 4-channel, low-power digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features Schmitt-trigger inputs, tri-state outputs with enable, selectable fail-safe mode (default high/low), and operates across –40 to 125 °C with 2.25–5.5 V supply on both sides. It is used in battery management systems and onboard chargers requiring robust galvanic isolation.

For engineers reviewing the SI86SL40EC-IS1R datasheet, SI86SL40EC-IS1R pinout, SI86SL40EC-IS1R application, or SI86SL40EC-IS1R equivalent, key selection criteria include its 6000 VRMS reinforced insulation per UL 1577 and VDE 60747-17, sleep-mode capability via SMb pin, and compatibility with isolated SPI and bidirectional bus architectures in high-noise EV powertrain subsystems.

Technical Context

The SI86SL40EC-IS1R implements RF-based on/off keying across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic timing. Its architecture supports independent UVLO and reset monitoring on both sides (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO+ at 2.18 V.

It integrates four unidirectional channels (A1–A4 to B1–B4), an active-low SMb sleep control pin, and tri-state output enable logic. The device uses CMOS thresholds with 0.15×VDD input hysteresis and delivers 10 ns typical propagation delay with 3.5 ns pulse width distortion at 5 V supply.

Key Specifications

Pinout & Package

SI86SL40EC-IS1R is housed in a narrow-body SOIC-16 package (NB SOIC-16) with 8.3 mm creepage/clearance, supporting 6000 VRMS isolation. Pinout follows the Si86SL4x configuration: Side A (pins 1–8) and Side B (pins 9–16) are separated by an internal semiconductor isolation barrier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4402ARWZ and ISO7741FDWR, SI86SL40EC-IS1R uniquely combines AEC-Q100 Grade 1 qualification, 6000 VRMS reinforced isolation, integrated sleep mode (SMb), and 150 Mbps speed-making it the only drop-in solution for next-generation 800 V EV power electronics requiring ASIL-C compliance and ultra-low standby power.

Availability

SI86SL40EC-IS1R is available at Aetrix Electronics and suitable for battery management systems, onboard chargers, and traction inverter control requiring stable component supply across automotive production lifecycles.

Supply support for SI86SL40EC-IS1R 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 for wireless, automotive, and industrial markets.

The Si86S6xx/Lxx family-including SI86SL40EC-IS1R-is designed specifically for high-reliability galvanic isolation in electric vehicle powertrain systems, emphasizing AEC-Q100 qualification, reinforced safety certification, and low-power operation.

FAQ

What is the isolation voltage rating of SI86SL40EC-IS1R and which safety standards does it meet?

SI86SL40EC-IS1R provides 6000 VRMS reinforced isolation per UL 1577 (1-minute test) and complies with VDE 60747-17, CSA 62368-1, and CQC GB4943.1. These certifications validate its suitability for automotive battery systems and medical equipment where double insulation is mandated. The NB SOIC-16 package achieves 8.3 mm creepage to support these ratings.

Does SI86SL40EC-IS1R support fail-safe output behavior during power loss?

Yes, SI86SL40EC-IS1R offers a selectable fail-safe mode determined at order time: default high or default low output state when VDD1 is unpowered but VDD2 remains active. This behavior is implemented via internal circuitry and documented in Table 4 of the datasheet, enabling safe shutdown in BMS and OBC applications.

How does the SMb pin function in SI86SL40EC-IS1R, and what power savings does it provide?

The SMb pin is an active-low sleep mode control. When driven low, SI86SL40EC-IS1R disables all transmitter/receiver circuits except one monitoring channel, reducing quiescent current to 750 µA per side. This enables ultra-low-power standby in charging infrastructure without sacrificing wake latency or signal integrity.

What is the maximum data rate supported by SI86SL40EC-IS1R, and how does it compare to standard SPI interfaces?

SI86SL40EC-IS1R supports up to 150 Mbps, exceeding standard SPI (typically ≤30 MHz) and enabling full-duplex isolated SPI or QSPI implementations. Its 10 ns propagation delay and 3.5 ns pulse width distortion ensure timing margins for 50 MHz clocked interfaces, making it ideal for high-speed isolated ADC/DAC links in motor control.

Is SI86SL40EC-IS1R compatible with 3.3 V and 5 V logic families on both sides simultaneously?

Yes, SI86SL40EC-IS1R operates with independent 2.25–5.5 V supplies on Side A (VDD1) and Side B (VDD2), allowing direct interface with 3.3 V MCUs on one side and 5 V analog front-ends or gate drivers on the other-no external level shifters required.