Skyworks Solutions Inc. SI86S622EE-AS4

Overview

SI86S622EE-AS4 from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features Schmitt-trigger + CMOS inputs, selectable fail-safe output (default low), and operates across –40 to +125 °C in NB SOIC-8 package. It enables isolated communication in battery management systems and traction inverters.

For engineers reviewing the SI86S622EE-AS4 datasheet, SI86S622EE-AS4 pinout, SI86S622EE-AS4 application, or SI86S622EE-AS4 equivalent, key selection criteria include its 10 ns typical propagation delay, 100 kV/µs CMTI, dual-channel architecture with independent side-A/side-B supplies, and automotive-grade safety certifications including VDE 60747-17 and UL 1577.

Technical Context

The SI86S622EE-AS4 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture delivers precise timing with ≤4.5 ns pulse width distortion and supports independent UVLO and reset monitoring per side (VDD1/VDD2).

It integrates input deglitch filters (36 ns) and offers fail-safe operation where outputs default to logic low during unpowered input-side conditions. The device maintains 50 Ω nominal output impedance and requires only 0.1 µF + 10 µF bypass capacitors per supply rail.

Key Specifications

Pinout & Package

NB SOIC-8 package (wide-body, 8-pin) with 3.9 mm creepage/clearance and 0.036 mm internal DTI; optimized for 6000 VRMS withstand per UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM220N0BRZ-RL7 and ISO7721DWR, the SI86S622EE-AS4 provides higher isolation voltage (6000 vs. 5000 VRMS), automotive qualification, and integrated 36 ns input filtering-making it uniquely suited for safety-critical EV powertrain subsystems requiring long-term reliability under high dV/dt stress.

Availability

SI86S622EE-AS4 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, onboard chargers, and industrial PLC I/O modules requiring stable component supply and automotive-grade lifecycle assurance.

Supply support for SI86S622EE-AS4 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 markets.

The Si86S6xx family was designed specifically for automotive and industrial isolation applications demanding AEC-Q100 qualification, reinforced safety certification, and robust performance in high-noise, high-voltage environments.

FAQ

What is the isolation voltage rating of the SI86S622EE-AS4 and how is it certified?

The SI86S622EE-AS4 is rated for 6000 VRMS isolation per UL 1577 and carries reinforced insulation certification per VDE 60747-17 and CSA 62368-1. These ratings are validated through time-dependent dielectric breakdown (TDDB) testing and 1-minute withstand tests. The NB SOIC-8 package provides 3.9 mm creepage and clearance, meeting requirements for 1000 VDC working voltage in automotive traction systems. SI86S622EE-AS4 achieves this with a 0.036 mm internal distance through insulation (DTI).

Does the SI86S622EE-AS4 require external components for stable operation?

Yes - the SI86S622EE-AS4 requires two bypass capacitors per supply rail: a 0.1 µF ceramic capacitor placed adjacent to each VDD pin and a 10 µF bulk capacitor near the package. These are mandatory for noise suppression and stable RF oscillator operation. Input/output series resistors (50–300 Ω) are optional but recommended in highly noisy environments. SI86S622EE-AS4 does not require pull-up/down resistors due to its integrated fail-safe configuration.

How does the fail-safe mode function on the SI86S622EE-AS4?

The SI86S622EE-AS4 is configured as a default-low fail-safe device: when VDD1 (side-A supply) is unpowered or below UVLO threshold (≤2.12 V), the B1 and B2 outputs are actively driven low while VDD2 remains powered. This behavior is hard-coded into the silicon and cannot be changed in-circuit. SI86S622EE-AS4 uses internal pulldown circuitry during startup (0.3 ms) and transitions to its defined fail-safe state after reset release. It does not enter high-impedance mode.

What is the significance of the "EE" and "AS4" suffixes in SI86S622EE-AS4?

The "EE" denotes the NB SOIC-8 package variant with enhanced creepage (8.0 mm) and reinforced insulation rating, while "AS4" specifies the ordering option for default-low fail-safe output behavior and AEC-Q100 Grade 0 qualification (–40 to +125 °C). SI86S622EE-AS4 is distinct from "EB" (default-high) and "ES" (standard industrial grade) variants. These suffixes define critical safety, thermal, and functional attributes-not just packaging.

Can the SI86S622EE-AS4 interface directly with 1.8 V logic?

No - the SI86S622EE-AS4 has a minimum supply voltage of 2.25 V per side and is not rated for 1.8 V operation. Its input thresholds scale with VDD (VIH = 0.7 × VDD, VIL = 0.3 × VDD), so at 2.25 V supply, VIH is 1.575 V - insufficient for reliable 1.8 V logic high detection. SI86S622EE-AS4 supports 2.5 V, 3.3 V, and 5.0 V logic families. For 1.8 V systems, level-shifting circuitry or a different isolator (e.g., Si862xx with 1.71 V min) is required.