Skyworks Solutions Inc. SI8602AB-ASR

Overview

SI8602AB-ASR from Skyworks Solutions is a bidirectional I²C isolator with one bidirectional SDA channel and one unidirectional SCL channel, implemented in an 8-pin narrow-body SOIC package. It provides galvanic isolation up to 2.5 kVRMS, supports I²C bus speeds to 1.7 MHz, features open-drain outputs with 35 mA sink capability, and operates across –40 °C to +125 °C with 3.0–5.5 V supply rails - deployed in battery management systems and isolated digital power communications.

For engineers reviewing the SI8602AB-ASR datasheet, SI8602AB-ASR pinout, SI8602AB-ASR application, or SI8602AB-ASR equivalent, this page delivers verified electrical specs, anti-latch I²C timing behavior, automotive-grade AEC-Q100 qualification status, SOIC-8 narrow-body package dimensions, and real-world design constraints for hot-swap and ground-loop elimination in SMBus-coupled subsystems.

Technical Context

The SI8602AB-ASR uses Skyworks' proprietary RF-based semiconductor isolation barrier, enabling true bidirectional SDA and unidirectional SCL signal transfer without external anti-latch circuitry. Its side-A logic levels (VOL ≤ 0.8 V, VIL ≥ 0.41 V, ΔV ≥ 50 mV) are engineered to prevent bus latching during clock stretching, while side-B inputs accept standard CMOS thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).

Each side includes independent undervoltage lockout (UVLO) with separate AVDD/BVDD monitoring, ensuring safe startup/shutdown sequencing. The device maintains I²C compliance under hot-swap conditions via built-in protection against data corruption when an unpowered unit connects to a live bus.

Key Specifications

Pinout & Package

SI8602AB-ASR is housed in an RoHS-compliant 8-pin narrow-body SOIC package (5.3 mm × 4.4 mm, 1.27 mm pitch), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM1250ARZ and ISO1540DR, SI8602AB-ASR uniquely integrates anti-latch logic, achieves 1.7 MHz I²C speed, and delivers AEC-Q100 qualification in the same SOIC-8 footprint - making it the only drop-in solution for automotive BMS and PoE applications demanding full protocol transparency and long-term reliability.

Availability

SI8602AB-ASR is available at Aetrix Electronics and suitable for battery management systems, Power over Ethernet infrastructure, and motor control systems requiring stable component supply, automotive-grade traceability, and long-lifecycle support.

Supply support for SI8602AB-ASR 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 SI860x family was designed specifically for galvanic isolation of I²C and SMBus interfaces in safety-critical, high-reliability applications - emphasizing low propagation delay, latch-free operation, and automotive-grade manufacturing rigor.

FAQ

What is the maximum I²C bus frequency supported by the SI8602AB-ASR?

The SI8602AB-ASR supports a maximum I²C bus frequency of 1.7 MHz, meeting fast-mode-plus timing requirements. This performance is validated across the full operating temperature range (–40 °C to +125 °C) and supply voltage range (3.0–5.5 V), with propagation delays under 45 ns (5 V operation) and pulse width distortion below 35 ns - ensuring reliable clock stretching and multi-master arbitration.

Does the SI8602AB-ASR require external components for I²C isolation?

No, the SI8602AB-ASR requires only standard I²C pull-up resistors on both sides of the isolation barrier. Its integrated anti-latch architecture eliminates the need for external diodes, MOSFETs, or logic gates typically used with unidirectional isolators. The device's side-A VOL/VIL offset (≥50 mV) inherently prevents bus latching during clock stretching or arbitration.

Is the SI8602AB-ASR qualified for automotive applications?

Yes, the SI8602AB-ASR is AEC-Q100 qualified and manufactured using Skyworks' automotive-specific process flows, including zero-defect methodology, AIAG-compliant PPAP documentation, and IMDS/CAMDS material reporting. Its –40 °C to +125 °C operating range and 2.5 kVRMS isolation rating meet requirements for battery management systems and on-board chargers.

What isolation certifications does the SI8602AB-ASR hold?

The SI8602AB-ASR is certified to UL 1577 (2.5 kVRMS for 1 minute), CSA Component Notice 5A, and IEC 60950-1 reinforced insulation standards. It also complies with IEC 60747-5-5 and carries CQC approval (GB4943.1), confirming suitability for end-equipment safety certification in industrial and automotive markets.

How does the SI8602AB-ASR handle power loss on one side of the isolation barrier?

When either AVDD or BVDD drops below UVLO threshold, the corresponding side enters undervoltage lockout independently. For I²C channels, outputs go to high-impedance (Hi-Z) when power is lost on the opposite side - preventing back-powering and ensuring bus integrity. Non-I²C channels revert to defined states within 1 µs after power restoration, as specified in the Si86xx Operation Table.