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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8442BA-C-IS1R

Name: SI8442BA-C-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI8442BA-C-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8442BA-C-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SI8442BA-C-IS1R.pdf

Description:: DGTL ISO 1000VRMS 4CH GP 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI8442BA-C-IS1R from Skyworks Solutions is a quad-channel digital isolator with reinforced isolation, designed for high-noise industrial and automotive signal conditioning across two independent voltage domains. It delivers 150 Mbps data rate, <9.5 ns worst-case propagation delay, 2.5 kV_RMS withstand voltage, and operates from 2.70–5.5 V on both sides. It is used in isolated ADC interfaces and motor control gate drivers where precise timing and low power are critical.

For engineers reviewing the SI8442BA-C-IS1R datasheet, SI8442BA-C-IS1R pinout, SI8442BA-C-IS1R application, or SI8442BA-C-IS1R equivalent, this page provides verified specifications, SOIC-16 wide-body package details, timing-critical design values (e.g., 0.5 ns channel-channel skew), safety certifications (UL, CSA, VDE), and real-world alternative part guidance - all confirmed against Skyworks Rev. 1.7 documentation.

Technical Context

The SI8442BA-C-IS1R implements capacitive isolation with on-chip RF modulation/demodulation, enabling DC-to-150 Mbps operation without start-up initialization. Its dual-supply architecture supports asymmetric VDD1/VDD2 operation (2.70–5.5 V each) and features integrated enable control with 5–8 ns enable-to-data timing.

It achieves 25 kV/µs common-mode transient immunity (CMTI) and maintains stable timing performance over –40 to +125 °C at full data rate. The device uses 85 Ω nominal output impedance and requires only VDD bypass capacitors - no external transformers or optocoupler biasing components.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - supports high-speed serial links like isolated SPI, RS-485 transceiver control, and PWM feedback in inverters.
Propagation Delay	3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical sampling in isolated ADC/DAC systems.
Channel-Channel Skew	0.5–1.8 ns (typ/max) - ensures synchronized multi-channel isolation for phase-aligned motor control signals.
Isolation Withstand	2500 V_RMS for 1 minute - certified for reinforced insulation per UL 1577, CSA 5A, and VDE IEC 60747-5-2.
Supply Voltage Range	2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters.
Power Consumption	11.8 mA per side at 100 Mbps / 5 V - enables ultra-low-power isolated communication in battery-backed or thermally constrained systems.
CMTI	25 kV/µs - suppresses noise-induced glitches in high-dV/dt environments such as IGBT gate drive circuits.

Pinout & Package

SI8442BA-C-IS1R is housed in a 16-pin wide-body SOIC package (package code IS1R), with creepage/clearance of 8.0 mm and reinforced insulation rated for 2.5 kV_RMS. Pin numbering follows standard SOIC-16 convention (pin 1 = top-left corner, notch indicator).

Pin/Terminal	Circuit Role	Design Meaning
VDD1, VDD2	Primary and secondary supply pins	Independent 2.70–5.5 V supplies for input and output sides; each requires local 0.1 µF bypass capacitor.
GND1, GND2	Input-side and output-side ground references	Galvanically isolated grounds - no shared reference; essential for breaking ground loops in motor drives.
EN1, EN2	Enable inputs for channel groups	Active-high enables; outputs go high-impedance when disabled - supports dynamic power gating in sleep modes.
IN1–IN4	Digital input channels (side 1)	Accept CMOS/TTL logic levels; VIH ≥ 2.0 V, VIL ≤ 0.8 V - compatible with 3.3 V and 5 V controllers.
OUT1–OUT4	Isolated digital output channels (side 2)	Drive 4 mA loads at VOL ≤ 0.4 V; 85 Ω output impedance - matches controlled-impedance PCB traces for clean signal integrity.

Key Features

Feature	Design Value
Quad-channel isolation	Four independent bidirectional signal paths in one SOIC-16 package - reduces board space vs. four discrete optocouplers.
No start-up initialization	Valid output within 40 µs of power-on - eliminates boot-time delays in safety-critical power systems.
Precision timing	1.5 ns pulse width distortion and 0.5 ns channel-channel skew - preserves signal fidelity in high-resolution encoder interfaces.
AEC-Q100 qualified	Rated for automotive-grade temperature range (–40 to +125 °C) and stress testing - suitable for EV traction inverter control.
RoHS-compliant wide-body SOIC	8.0 mm creepage/clearance meets IEC 60664-1 requirements for 600 V_RMS working voltage - simplifies system-level safety certification.

Applications

Industrial Motor Control	Isolated Data Acquisition
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent, low-skew signal paths between MCU and IGBT/SiC drivers. Use Value: 0.5 ns channel-channel skew and 25 kV/µs CMTI prevent shoot-through and false triggering during fast switching transitions.	Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC130x) to host processors in high-voltage battery monitoring. IC Role / Device Role / Timing Role: High-speed digital isolator transmitting oversampled bitstreams across isolation barrier with minimal jitter. Use Value: 150 Mbps data rate and <9.5 ns propagation delay support 20+ MSps sampling without pipeline bottlenecks.
Hybrid Electric Vehicle Powertrain	Isolated Switch-Mode Power Supply
Use Scenario: Signal isolation in OBC (on-board charger) control boards handling AC-DC and DC-DC conversion stages. IC Role / Device Role / Timing Role: Reinforced-isolation interface for voltage/current sensing, fault reporting, and auxiliary power sequencing. Use Value: AEC-Q100 qualification and 125 °C operation ensure reliability under under-hood thermal stress and vibration.	Use Scenario: Isolating feedback signals (voltage sense, current limit) from secondary-side controllers to primary-side PWM ICs. IC Role / Device Role / Timing Role: Low-power, high-CMTI isolator replacing optocouplers in digitally controlled LLC resonant converters. Use Value: Ultra-low 11.8 mA/channel @100 Mbps reduces standby losses while maintaining tight regulation loop response.

Industrial Motor Control

Isolated Data Acquisition

Use Scenario: Isolating PWM gate-drive signals and current-sense feedback in 3-phase inverter stacks.

IC Role / Device Role / Timing Role: Quad-channel isolator providing independent, low-skew signal paths between MCU and IGBT/SiC drivers.

Use Value: 0.5 ns channel-channel skew and 25 kV/µs CMTI prevent shoot-through and false triggering during fast switching transitions.

Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC130x) to host processors in high-voltage battery monitoring.

IC Role / Device Role / Timing Role: High-speed digital isolator transmitting oversampled bitstreams across isolation barrier with minimal jitter.

Use Value: 150 Mbps data rate and <9.5 ns propagation delay support 20+ MSps sampling without pipeline bottlenecks.

Hybrid Electric Vehicle Powertrain

Isolated Switch-Mode Power Supply

Use Scenario: Signal isolation in OBC (on-board charger) control boards handling AC-DC and DC-DC conversion stages.

IC Role / Device Role / Timing Role: Reinforced-isolation interface for voltage/current sensing, fault reporting, and auxiliary power sequencing.

Use Value: AEC-Q100 qualification and 125 °C operation ensure reliability under under-hood thermal stress and vibration.

Use Scenario: Isolating feedback signals (voltage sense, current limit) from secondary-side controllers to primary-side PWM ICs.

IC Role / Device Role / Timing Role: Low-power, high-CMTI isolator replacing optocouplers in digitally controlled LLC resonant converters.

Use Value: Ultra-low 11.8 mA/channel @100 Mbps reduces standby losses while maintaining tight regulation loop response.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM140D0BRWZ	150 Mbps, 10 ns max propagation delay, 3.75 kV_RMS isolation, SOIC-16 wide body, but higher 14.5 mA/channel @100 Mbps.	Higher isolation rating suits medical equipment; less suitable for thermally constrained automotive modules due to higher power.	Choose when >3 kV_RMS isolation is mandatory and power budget allows ~25% higher current draw.
ISO6741QDWR	50 Mbps max, 11 ns max propagation delay, 5 kV_RMS, SOIC-16 wide body, AEC-Q100 qualified, 8.5 mA/channel @50 Mbps.	Lower speed but superior isolation and lower power - ideal for non-high-speed diagnostics and safety monitoring loops.	Choose for cost-sensitive automotive subsystems where 50 Mbps suffices and 5 kV_RMS reinforces functional safety compliance.

Compared with ADUM140D0BRWZ and ISO6741QDWR, the SI8442BA-C-IS1R offers the best balance of 150 Mbps speed, ultra-low skew (0.5 ns), and AEC-Q100 qualification in a 2.5 kV_RMS package - making it optimal for timing-critical EV inverter gate drive and isolated ADC interfaces where thermal headroom is limited.

Availability

SI8442BA-C-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle powertrain systems, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.

Supply support for SI8442BA-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, with leadership in RF, timing, and isolation technologies.

The Si84xx family was engineered for high-reliability, low-power digital isolation in harsh environments - targeting industrial automation, automotive electrification, and energy infrastructure where legacy optocouplers fail on speed, lifetime, or temperature stability.

FAQ

What is the maximum operating temperature for SI8442BA-C-IS1R at full 150 Mbps data rate?

The SI8442BA-C-IS1R is fully specified for continuous operation at –40 to +125 °C ambient temperature while sustaining 150 Mbps data rate across all four channels. This rating is validated per Skyworks Rev. 1.7 datasheet Table 1 and applies to both 3.3 V and 5 V supply conditions with 15 pF load.

Does SI8442BA-C-IS1R require external components for basic operation?

No. SI8442BA-C-IS1R requires only 0.1 µF ceramic bypass capacitors on VDD1 and VDD2 - no pull-ups, level shifters, or external termination resistors. Its integrated 85 Ω output impedance and rail-to-rail logic compatibility eliminate external circuitry needed by optocouplers or older isolators.

Is SI8442BA-C-IS1R pin-compatible with other Si844x variants?

Yes. SI8442BA-C-IS1R shares identical pinout and package (SOIC-16 wide body) with all Si8440/41/42/45 devices in the same revision (e.g., SI8442BB-C-IS1R, SI8441BA-C-IS1R). Channel count, speed grade, and enable configuration differ by part number, but PCB layout remains unchanged.

What safety certifications apply to SI8442BA-C-IS1R?

SI8442BA-C-IS1R carries UL 1577 (2500 V_RMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 certifications. All apply to the 2.5 kV_RMS isolation rating and were verified via production-tested 3.0 kV_RMS for 1 second per Skyworks documentation.

How does the enable function behave on SI8442BA-C-IS1R?

SI8442BA-C-IS1R features two independent enable inputs (EN1, EN2) controlling two pairs of channels. When an enable pin is low, its associated outputs enter high-impedance state within 9.2 ns (ten2). This allows dynamic power gating and bus sharing without external tri-state logic.

SI8442BA-C-IS1R Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 4

Inputs - Side 1/Side 2:: 2/2

Channel Type:: Unidirectional

Voltage - Isolation:: 1000Vrms

Common Mode Transient Immunity (Min):: 25kV/µs (Typ)

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 9.5ns, 9.5ns

Pulse Width Distortion (Max):: 2.5ns

Rise / Fall Time (Typ):: 3.8ns, 2.8ns

Voltage - Supply:: 2.7V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

SI8442BA-C-IS1R FAQ

1.How can I place an order for SI8442BA-C-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8442BA-C-IS1R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI8442BA-C-IS1R reliable?

The price and inventory of SI8442BA-C-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442BA-C-IS1R is usually 5 days.

3.What payment methods are accepted for SI8442BA-C-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442BA-C-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8442BA-C-IS1R?

SI8442BA-C-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8442BA-C-IS1R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI8442BA-C-IS1R?

For technical support, including SI8442BA-C-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442BA-C-IS1R requirements.

6.How does Aetrix verify that SI8442BA-C-IS1R is sourced from the original manufacturer or authorized distributors?

All SI8442BA-C-IS1R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8442BA-C-IS1R meets industry standards.

7.What is the process for return or replacement of SI8442BA-C-IS1R?

All SI8442BA-C-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8442BA-C-IS1R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI8442BA-C-IS1R part is unused and in its original packaging.

Return procedure for SI8442BA-C-IS1R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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