Skyworks Solutions Inc. SI8441BB-C-IS1R

Overview

SI8441BB-C-IS1R 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 <8.0 mA per channel at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power systems.

For engineers reviewing the SI8441BB-C-IS1R datasheet, SI8441BB-C-IS1R pinout, SI8441BB-C-IS1R application, or SI8441BB-C-IS1R equivalent, key selection criteria include reinforced 2500 VRMS isolation rating, AEC-Q100 qualification, precise timing performance at 125 °C ambient, and compatibility with 3.3 V and 5 V logic domains on both sides of isolation barrier.

Technical Context

The SI8441BB-C-IS1R uses capacitive isolation technology with on-chip RF modulation/demodulation for signal transfer across the isolation barrier. Its four independent channels support bidirectional or unidirectional data flow without start-up initialization, and each channel features integrated 85 Ω output impedance for controlled-impedance PCB trace matching.

It implements enable-controlled tri-state outputs with 5.0–8.0 ns enable-to-data-valid latency and supports operation over –40 to +125 °C at full 150 Mbps data rate. Safety certification includes UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 V_PEAK working voltage).

Key Specifications

Pinout & Package

The SI8441BB-C-IS1R is housed in a 16-pin wide-body SOIC package (package outline per Skyworks Doc #28) with 8.0 mm minimum creepage/clearance, rated for 2500 VRMS isolation. Pin 1 is marked with a dot; pins 1–8 form the primary-side interface, and pins 9–16 form the secondary-side interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM140D0BRIZ and ISO6741QDWR, the SI8441BB-C-IS1R uniquely combines AEC-Q100 Grade 1 qualification, 150 Mbps speed, and 2500 VRMS isolation in a wide-body SOIC-making it optimal for automotive OBC and industrial servo drives requiring both performance and safety certification.

Availability

SI8441BB-C-IS1R is available at Aetrix Electronics and suitable for industrial motor drives, automotive onboard chargers, isolated switch-mode supplies, and precision data acquisition systems requiring stable component supply and long-term lifecycle support.

Supply support for SI8441BB-C-IS1R 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 for wireless, automotive, and industrial markets.

The SI8441BB-C-IS1R belongs to the Si844x family of capacitive digital isolators, designed specifically for high-reliability, high-speed isolation in safety-critical power conversion and motor control applications.

FAQ

What is the maximum data rate supported by the SI8441BB-C-IS1R?

The SI8441BB-C-IS1R supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40 to +125 °C, CL = 15 pF). This is confirmed in Table 3 of the Skyworks datasheet Rev. 1.7, where Si844xBx variants-including SI8441BB-C-IS1R-are explicitly rated for 0–150 Mbps operation with 6.0 ns minimum pulse width.

Does the SI8441BB-C-IS1R require external pull-up or pull-down resistors on its input pins?

No, the SI8441BB-C-IS1R does not require external pull-up or pull-down resistors on IN1–IN4 pins. Its CMOS-compatible inputs have defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds and internal biasing that ensures valid logic states without external components-verified in Tables 3–5 of the datasheet under "High Level Input Voltage" and "Low Level Input Voltage" parameters.

What safety certifications apply to the SI8441BB-C-IS1R?

The SI8441BB-C-IS1R is certified to UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 V_PEAK). These are documented in Tables 6 and 7 of the datasheet Rev. 1.7 and apply to the 2.5 kVRMS-rated devices, including SI8441BB-C-IS1R in wide-body SOIC packaging.

How does the enable functionality work on the SI8441BB-C-IS1R?

The SI8441BB-C-IS1R features dual enable inputs (EN1 and EN2) that place respective output banks into high-impedance tri-state mode when deasserted. Enable-to-data-valid latency is 5.0–8.0 ns, and enable-to-tri-state latency is 7.0–9.2 ns-values measured per Figure 1 and specified in Table 3. This allows dynamic control of isolated signal paths without disrupting upstream logic.

Is the SI8441BB-C-IS1R suitable for automotive applications?

Yes, the SI8441BB-C-IS1R is AEC-Q100 qualified (Grade 1, –40 to +125 °C), making it suitable for automotive applications including onboard chargers, battery management interfaces, and traction inverter control. This qualification is explicitly stated in the "Features" section of the datasheet Rev. 1.7 and validated across all electrical specs in Tables 3–5 at full temperature range.