Skyworks Solutions Inc. SI86S606AB-IUR

Overview

SI86S606AB-IUR from Skyworks Solutions is a bidirectional I²C isolator with two unidirectional non-I²C channels, designed for galvanic isolation of SMBus and I²C interfaces in high-reliability systems. It features 5.0 kV_RMS isolation, 1.7 MHz I²C bus speed support, open-drain SDA/SCL outputs with 35 mA sink capability, and operates across –40 °C to +125 °C at 3.0–5.5 V supply.

For engineers reviewing the SI86S606AB-IUR datasheet, SI86S606AB-IUR pinout, SI86S606AB-IUR application, or SI86S606AB-IUR equivalent, this device delivers certified reinforced insulation (UL, VDE, CSA), AEC-Q100 qualification, hot-swap robustness, and anti-latch I²C channel architecture - critical for automotive battery management, isolated digital power communication, and PoE controller isolation where ground-loop elimination and safety compliance are mandatory.

Technical Context

The SI86S606AB-IUR implements Skyworks' proprietary RF-based semiconductor isolation barrier, enabling true bidirectional SDA/SCL signaling without external anti-latch circuitry. Its Side A logic levels (VOL ≤ 0.8 V, VIL ≥ 0.41 V, ΔV ≥ 50 mV) prevent bus latching during clock stretching, while Side B supports standard CMOS thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).

All six channels - two bidirectional I²C (SDA/SCL) and two forward-only unidirectional digital channels - operate independently with separate AVDD/AGND and BVDD/BGND domains. Undervoltage lockout (UVLO) functions per-side, and unpowered-side inputs enter high-impedance state to avoid data corruption during hot-insertion.

Key Specifications

Pinout & Package

SI86S606AB-IUR is housed in a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16), offering 8.3 mm creepage and clearance for reinforced insulation compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C isolator applications.

Compared with ADUM1250ARZ and ISO1540DR, SI86S606AB-IUR uniquely integrates two forward unidirectional channels with 5.0 kV_RMS reinforced insulation and AEC-Q100 qualification - delivering higher functional integration, broader safety certification, and automotive-grade reliability in a single WB SOIC-16 package.

Availability

SI86S606AB-IUR is available at Aetrix Electronics and suitable for automotive battery management systems, isolated digital power supply communications, and Power over Ethernet applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI86S606AB-IUR 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, isolation, and connectivity solutions for high-performance wireless and wired infrastructure.

The Si860x family - including SI86S606AB-IUR - was engineered specifically for robust, certified galvanic isolation of I²C/SMBus interfaces in automotive, industrial, and medical systems where safety, longevity, and noise immunity are non-negotiable.

FAQ

What is the maximum I²C bus frequency supported by SI86S606AB-IUR?

The SI86S606AB-IUR supports a maximum I²C bus frequency of 1.7 MHz, enabling full-speed operation including clock stretching and multi-master arbitration. This specification is guaranteed across the full operating temperature range (–40 °C to +125 °C) and supply voltage range (3.0–5.5 V), as verified in Table 5.3 of the official Skyworks datasheet Rev. 206852A.

Does SI86S606AB-IUR include built-in anti-latch protection for I²C bus isolation?

Yes, SI86S606AB-IUR incorporates dedicated anti-latch circuitry on Side A, ensuring stable bidirectional I²C operation without external components. Its Side A output low voltage (VOL ≤ 0.8 V) is intentionally higher than its input low threshold (VIL ≥ 0.41 V), maintaining a minimum ΔV of 50 mV to prevent bus latching during clock stretching - a core feature confirmed in Section 3.2 and Table 5.3 of the Si860x datasheet.

What safety certifications does SI86S606AB-IUR hold?

SI86S606AB-IUR is certified to UL 1577 (5.0 kV_RMS), VDE 0884-10 (reinforced), CSA Component Notice 5A, and IEC 61010-1. It also meets IEC 60950-1 and GB4943.1 standards. These certifications are explicitly listed in the Safety Regulatory Approvals section of the Si860x datasheet and apply to the SI86S606AB-IUR variant per Table 1.1 ordering guide.

Is SI86S606AB-IUR qualified for automotive applications?

Yes, SI86S606AB-IUR is AEC-Q100 qualified and designated as an automotive-grade part (suffix "-A"). It is manufactured using automotive-specific process flows, supported by AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect methodology - all confirmed in Section 1.1 (Ordering Guide) and Automotive Applications section of the Si860x datasheet.

What is the function of the two unidirectional channels in SI86S606AB-IUR?

The two unidirectional channels in SI86S606AB-IUR are forward-only (A-to-B) digital isolators, intended for auxiliary signals such as interrupt requests, reset commands, or fault flags. As specified in Table 1.1 and Figure 3.7, they operate at up to 10 Mbps, support CMOS logic levels, and share the same isolation barrier and safety ratings as the I²C channels - enabling consolidated isolation of control and telemetry paths.