Skyworks Solutions Inc. SI86SL42BE-IS2R

Overview

SI86SL42BE-IS2R 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 two forward and two reverse isolated channels, Schmitt-trigger inputs, tri-state outputs with enable, and operates across –40 to 125 °C in NB SOIC-16 package. Used in battery management systems and traction inverters where high noise immunity and fail-safe operation are critical.

For engineers reviewing the SI86SL42BE-IS2R datasheet, SI86SL42BE-IS2R pinout, SI86SL42BE-IS2R application, or SI86SL42BE-IS2R equivalent, this page delivers verified specifications, validated pin functions, automotive-grade safety certifications (UL, VDE, CSA), and real-world use context for isolated SPI, ADC/DAC interfaces, and motor control gate drivers.

Technical Context

The SI86SL42BE-IS2R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI). Its architecture supports independent undervoltage lockout (UVLO) and reset per side (VDD1/VDD2), with fail-safe output default selectable at order time (high or low).

It integrates sleep mode via SMb pin-driving SMb low reduces quiescent current to 750 µA per side while retaining one active channel to monitor SMb state. Unlike Si86S6x variants, the SL-series prioritizes power efficiency over timing performance, delivering lower IDD without altering pinout or functional interface.

Key Specifications

Pinout & Package

NB SOIC-16 package (5.3 mm × 10.3 mm, 1.75 mm height) with creepage/clearance ≥8.3 mm, compliant with reinforced insulation standards for 6000 VRMS withstand.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM2402BRWZ and ISO7741FDWR, SI86SL42BE-IS2R uniquely combines AEC-Q100 Grade 0 qualification, 6000 VRMS reinforced isolation, and integrated sleep mode-making it the only option qualified for primary-side isolation in 800 V battery electric vehicle power conversion systems.

Availability

SI86SL42BE-IS2R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply across automotive production lifecycles.

Supply support for SI86SL42BE-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 semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.

The Si86Sxx family-including SI86SL42BE-IS2R-is engineered for high-reliability isolation in automotive electrification and industrial automation, emphasizing safety certification, low power, and noise resilience over legacy optocoupler alternatives.

FAQ

What is the isolation voltage rating of the SI86SL42BE-IS2R?

The SI86SL42BE-IS2R is rated for 6000 VRMS reinforced isolation per UL 1577 and IEC 60747-17, validated for one-minute withstand. This rating applies specifically to the NB SOIC-16 package variant and supports designs requiring compliance with IEC 62368-1 and IEC 60601-1 for medical and EV applications. The SI86SL42BE-IS2R achieves this through its proprietary silicon dioxide isolation barrier and optimized package mold compound.

Does the SI86SL42BE-IS2R support fail-safe output configuration?

Yes, the SI86SL42BE-IS2R offers a factory-selectable fail-safe mode where outputs default to either high or low during input-side power loss while the output side remains powered. This behavior is defined in ordering code suffixes and confirmed in Table 4 of the datasheet. For SI86SL42BE-IS2R, the "E" in the part number indicates default-low configuration, ensuring predictable shutdown states in battery management and motor control safety chains.

How does the SMb pin function on the SI86SL42BE-IS2R?

The SMb pin on the SI86SL42BE-IS2R is an active-low sleep mode control that reduces total quiescent current to 750 µA per side when asserted. Unlike standard enable pins, SMb retains one always-on isolation channel to monitor its state-allowing immediate wake-up when released. This feature is exclusive to SL-series devices and is documented in Section 3.4.2 of the datasheet. The SI86SL42BE-IS2R uses SMb to achieve ultra-low power without sacrificing restart latency.

What is the maximum data rate supported by the SI86SL42BE-IS2R?

The SI86SL42BE-IS2R supports data rates from DC up to 150 Mbps across all four channels, as specified in the device family description and electrical characteristics tables. This performance is maintained across the full operating temperature range (–40 to 125 °C) and supply voltage range (2.25–5.5 V). The SI86SL42BE-IS2R achieves this using RF-based on/off keying modulation, which avoids the speed limitations of pulse-width or edge-detection schemes used in competing isolators.

Is the SI86SL42BE-IS2R pin-compatible with other Si86Sxx devices?

The SI86SL42BE-IS2R shares identical pinout and footprint with Si86S642BE-IS2R and Si86SM42BE-IS2R in the NB SOIC-16 package, as confirmed in Figures 2 and 3 of the datasheet. However, functional differences exist: SL-series prioritizes low power (0.25 mA/channel less than S6x), SM-series adds sleep mode control, and S6x offers higher timing precision. Pin compatibility enables drop-in replacement only when power and timing requirements align with the SL-series specification.