Skyworks Solutions Inc. SI8442AA-D-IS1

Overview

SI8442AA-D-IS1 from Skyworks Solutions is a quad-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay <9.5 ns, 0.5 ns channel-channel skew, and 25 kV/µs common-mode transient immunity. It operates across 2.70–5.5 V supply rails and delivers <11.8 mA per side at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power inverters.

For engineers reviewing the SI8442AA-D-IS1 datasheet, SI8442AA-D-IS1 pinout, SI8442AA-D-IS1 application, or SI8442AA-D-IS1 equivalent, key selection criteria include its 2500 VRMS reinforced isolation rating, AEC-Q100 qualification, 16-pin wide-body SOIC footprint, and precise timing performance under –40°C to +125°C operation at full data rate.

Technical Context

The SI8442AA-D-IS1 implements capacitive isolation with on-chip RF modulation/demodulation circuitry, delivering DC-to-150 Mbps signal transfer without start-up initialization. Its dual-die architecture separates input and output domains, with independent VDD1 and VDD2 supplies enabling level-shifting between 2.70 V and 5.5 V logic domains.

Each of the four isolated channels features enable-controlled tri-state outputs, 85 Ω nominal output impedance, and guaranteed timing parameters including ≤6 ns minimum pulse width and ≤2.5 ns pulse width distortion (typical). The device meets IEC 60747-5-2 (VDE 0884-2) and UL 1577 safety standards for reinforced insulation at 2500 VRMS.

Key Specifications

Pinout & Package

The SI8442AA-D-IS1 is housed in a 16-pin wide-body SOIC package (package code IS1), with 8.0 mm creepage and clearance, RoHS-compliant matte tin lead finish, and JEDEC MS-013AC outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM140D0BRWZ and ISO6741QDWR, the SI8442AA-D-IS1 uniquely balances 150 Mbps speed, AEC-Q100 qualification, and 2500 VRMS isolation in a standard SOIC-16 footprint-making it optimal for automotive OBCs and industrial inverters needing both performance and certification.

Availability

SI8442AA-D-IS1 is available at Aetrix Electronics and suitable for industrial motor control, automotive onboard chargers, and isolated power supply feedback requiring stable component supply and long-term lifecycle support.

Supply support for SI8442AA-D-IS1 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 Si84xx family was designed specifically for high-reliability, high-speed digital isolation in harsh environments-targeting industrial automation, electric vehicle power systems, and medical equipment demanding safety-certified, low-jitter signal transfer.

FAQ

What is the maximum data rate supported by the SI8442AA-D-IS1?

The SI8442AA-D-IS1 supports a maximum data rate of 150 Mbps, verified across its full operating temperature range (–40°C to +125°C) and supply voltage range (2.70 V to 5.5 V). This specification applies to the 'Bx' variant suffix, confirmed in Table 3 and Table 4 of the official Skyworks datasheet Rev. 1.7. The SI8442AA-D-IS1 is part of the Si8442Bx series, distinguishing it from the slower 1 Mbps Si8442Ax variants.

Does the SI8442AA-D-IS1 require external startup initialization?

No, the SI8442AA-D-IS1 does not require external startup initialization. As stated in the Skyworks datasheet Rev. 1.7 Features section, "No start-up initialization required." The device achieves valid output data within 40 µs of power application (tSU), and begins operation immediately upon reaching valid supply voltage thresholds-enabling plug-and-play integration in real-time control systems without firmware overhead.

What safety certifications apply to the SI8442AA-D-IS1?

The SI8442AA-D-IS1 holds UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 certifications. These cover reinforced insulation up to 2500 VRMS for 1 minute, with production-tested withstand voltage of 3000 VRMS. Certification documentation is validated per File E257455 (UL), File 232873 (CSA), and File 5006301-4880-0001 (VDE), all explicitly referencing the Si8442AA-D-IS1's wide-body SOIC package.

How does the SI8442AA-D-IS1 manage power consumption at high data rates?

At 100 Mbps and 5 V supply, the SI8442AA-D-IS1 draws 11.8 mA per side (VDD1 and VDD2), totaling 23.6 mA typical. This ultra-low power is achieved via optimized RF modulation and low-capacitance isolation barriers. The datasheet confirms this value in Table 3 under "100 Mbps Supply Current" for Si8442Bx devices, making it significantly more efficient than competing isolators operating at similar speeds.

Is the SI8442AA-D-IS1 pin-compatible with other Si844x variants?

Yes, the SI8442AA-D-IS1 shares identical pinout and package (16-pin wide-body SOIC) with all Si8440/41/42/45 family members, including SI8440AB-D-IS1 and SI8445BB-D-IS1. Pin functions, spacing, and land pattern match exactly per Skyworks Package Outline document (page 28), enabling direct substitution within the same variant group (e.g., Bx-speed grade) without PCB redesign.