Skyworks Solutions Inc. SI86S622BE-AS4R

Overview

SI86S622BE-AS4R from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, AEC-Q100 qualification, and 150 Mbps data rate. It features Schmitt-trigger inputs, selectable fail-safe output (default low), 10 ns typical propagation delay, and operates across 2.25–5.5 V supply rails. It serves as a robust signal-level isolator in automotive battery management systems and industrial motor control interfaces.

For engineers reviewing the SI86S622BE-AS4R datasheet, SI86S622BE-AS4R pinout, SI86S622BE-AS4R application, or SI86S622BE-AS4R equivalent, key selection criteria include its 6 kVRMS reinforced insulation rating per UL 1577, CMTI of 100 kV/µs, -40 to +125 °C operating range, and SSO-8 package with side-A/side-B galvanic separation for high-noise environments.

Technical Context

The SI86S622BE-AS4R implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic timing. Its architecture delivers precise channel-to-channel skew ≤3 ns and pulse width distortion ≤4.5 ns, supporting high-fidelity digital signal transfer in isolated gate drivers and ADC interface paths.

It integrates independent undervoltage lockout (UVLO) and reset circuitry per side (VDD1/VDD2), with UVLO thresholds at 2.10–2.25 V (rising) and 1.98–2.12 V (falling), plus RSTB thresholds near 1.7 V. Fail-safe behavior defaults to logic low during input-side power loss, confirmed by ordering code 'E' in the part number.

Key Specifications

Pinout & Package

SI86S622BE-AS4R uses an SSO-8 (wide-body SOIC-8) package with 8.0 mm creepage/clearance, optimized for 6000 VRMS isolation. Pin 1 = VDD1, Pin 2 = A1, Pin 3 = A2, Pin 4 = GND1, Pin 5 = GND2, Pin 6 = B1, Pin 7 = B2, Pin 8 = VDD2. No NC pins; all terminals are functional and assigned to side-A or side-B domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM220N0BRZ-RL7 and ISO7721DWR, SI86S622BE-AS4R uniquely combines AEC-Q100 Grade 1, 6000 VRMS reinforced isolation, and 150 Mbps speed in an SSO-8 package-making it optimal for next-generation EV power electronics and high-density industrial inverters where safety, speed, and space are co-constrained.

Availability

SI86S622BE-AS4R is available at Aetrix Electronics and suitable for automotive battery management systems, industrial motor control drives, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI86S622BE-AS4R 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-reliability applications.

The Si86S6xx family was designed specifically for automotive and industrial systems demanding reinforced isolation, high CMTI, and AEC-Q100 compliance-targeting battery management, traction inverters, and factory automation.

FAQ

What is the isolation voltage rating of the SI86S622BE-AS4R and which safety standards does it meet?

The SI86S622BE-AS4R is rated for 6000 VRMS isolation per UL 1577 for 1 minute and carries reinforced insulation certification per VDE 60747-17 (2121 Vpeak), CSA 62368-1 (600 VRMS), and CQC GB4943.1 (250 VRMS). These ratings are validated for the SSO-8 package and apply directly to the SI86S622BE-AS4R device as shipped.

Does the SI86S622BE-AS4R require external components for stable operation?

Yes, the SI86S622BE-AS4R requires 0.1 µF and 10 µF bypass capacitors on both VDD1–GND1 and VDD2–GND2 pairs, placed as close as possible to the pins. Input/output series resistors (50–300 Ω) are optional but recommended in noisy environments to damp ringing and improve EMC performance.

What does the 'E' in SI86S622BE-AS4R indicate regarding fail-safe behavior?

The 'E' suffix in SI86S622BE-AS4R specifies the default-low fail-safe option: when VDD1 is unpowered or below UVLO, outputs B1 and B2 remain logic low while VDD2 is active. This behavior is factory-configured and irreversible-critical for safety-critical shutdown sequences in automotive and industrial systems.

How does the SI86S622BE-AS4R achieve high common-mode transient immunity (CMTI)?

The SI86S622BE-AS4R achieves 100 kV/µs CMTI through its RF-based modulation architecture and optimized internal layout, which minimizes coupling between side-A and side-B domains. This is measured per Figure 8 in the datasheet with ±1500 V common-mode steps and verified across –40 to +125 °C.

Is the SI86S622BE-AS4R pin-compatible with other devices in the Si86S6xx family?

No-SI86S622BE-AS4R has a fixed 2-channel configuration with A1/A2 inputs and B1/B2 outputs in SSO-8. While pinout matches SI86S620/S621 variants in the same package, functional differences (e.g., deglitch filter presence, fail-safe mode) mean direct substitution requires validation of timing, power, and safety behavior in the target application.