Skyworks Solutions Inc. SI86S642EB-AU

Overview

SI86S642EB-AU from Skyworks Solutions is a 4-channel, reinforced digital isolator with bidirectional signal isolation across a 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 supplies on both sides and features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, and selectable fail-safe default output (low) for industrial motor control and isolated ADC interfaces.

For engineers reviewing the SI86S642EB-AU datasheet, SI86S642EB-AU pinout, SI86S642EB-AU application, or SI86S642EB-AU equivalent, key selection criteria include its 4-channel forward/reverse configuration, WB SOIC-16 package with 8.3 mm creepage, AEC-Q100 qualification, and support for noise-immune isolated communication in battery management systems and traction inverters.

Technical Context

The SI86S642EB-AU implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling robust operation without optical degradation. Its architecture delivers 100 kV/µs CMTI, 36 ns input deglitch filtering, and independent UVLO monitoring per side (VDDUV+ = 2.18 V typ).

It supports dual-supply operation with side-specific enable pins (EN1/EN2), tri-state output control, and failsafe low-default behavior during unpowered input conditions - all verified under IEC 60747-17 reinforced insulation requirements and UL 1577 recognition at 6000 VRMS.

Key Specifications

Pinout & Package

SI86S642EB-AU is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, certified for reinforced insulation per IEC 60747-17 and UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4402ARWZ and ISO6741QDWR, SI86S642EB-AU delivers higher isolation voltage, faster data throughput, integrated noise filtering, and guaranteed fail-safe low behavior - making it the only option qualified for AEC-Q100 Grade 0 and certified for 6000 VRMS reinforced insulation in traction inverter subsystems.

Availability

SI86S642EB-AU is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and isolated switch-mode power supply designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI86S642EB-AU 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 for high-reliability applications.

The Si86S6xx family was designed specifically for high-speed, reinforced-isolation requirements in automotive traction systems and industrial automation, emphasizing AEC-Q100 qualification, 6000 VRMS certification, and RF-based noise immunity.

FAQ

What is the isolation voltage rating of the SI86S642EB-AU and which safety standards does it meet?

The SI86S642EB-AU provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation), CSA 62368-1, VDE 60747-17, and CQC GB4943.1. This enables use in 1000 VAC working voltage systems such as EV traction inverters and industrial AC drives where reinforced insulation is mandatory. The SI86S642EB-AU achieves this in a WB SOIC-16 package with 8.3 mm creepage distance.

Does the SI86S642EB-AU support bidirectional communication on each channel?

Yes, the SI86S642EB-AU supports true bidirectional signal isolation: A1–A4 and B1–B4 are independent digital I/O pairs across the isolation barrier, allowing data flow in either direction per channel without external direction control logic. This is confirmed in Figure 2 (Si86S64x pinouts) and Table 1 of the datasheet, where all A/B pins are labeled "Digital I/O" with no fixed transmit/receive assignment.

What is the purpose of the EN1 and EN2 pins on the SI86S642EB-AU?

EN1 and EN2 are active-high enable inputs that place all outputs on Side A or Side B, respectively, into high-impedance (tri-state) mode when driven low. This allows dynamic channel disabling during system sleep or fault conditions without disrupting the isolation barrier. The SI86S642EB-AU uses these pins for synchronized shutdown in motor control gate drivers and BMS cell monitoring circuits.

How does the 36 ns input deglitch filter function in the SI86S642EB-AU?

The SI86S642EB-AU includes a factory-configured 36 ns input deglitch filter that rejects noise pulses shorter than 36 ns on all A1–A4 inputs. Any valid pulse wider than 36 ns passes through with a fixed 36 ns delay; narrower pulses are fully suppressed. This feature is explicitly specified for the Si86S64x family in Section 3.4.5 and improves reliability in electrically noisy environments like motor drives and power converters.

Is the SI86S642EB-AU qualified for automotive applications and what grade does it meet?

Yes, the SI86S642EB-AU is AEC-Q100 qualified and rated for Grade 0 (–40 to +125 °C), with AIAG-compliant PPAP documentation and IMDS/CAMDS support. It is designed for automotive onboard chargers, battery management systems, charging stations, and traction inverters - meeting the robustness, defectivity, and process-flow requirements defined in the AEC-Q100 stress test standard.