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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8442AA-C-IS1

Name: SI8442AA-C-IS1
Brand: Skyworks Solutions Inc.
SKU: SI8442AA-C-IS1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8442AA-C-IS1

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

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

Datasheet:: SI8442AA-C-IS1.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI8442AA-C-IS1 from Skyworks Solutions is a quad-channel digital isolator with reinforced isolation, designed for high-noise industrial and automotive signal interfaces. 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 across –40 to +125 °C - enabling use in isolated motor control gate drivers and EV battery management systems.

For engineers reviewing the SI8442AA-C-IS1 datasheet, SI8442AA-C-IS1 pinout, SI8442AA-C-IS1 application, or SI8442AA-C-IS1 equivalent, key selection criteria include channel count (4), isolation rating (2.5 kV_RMS), supply voltage range (2.70–5.5 V), CMTI (25 kV/µs), and SOIC-16 wide-body package compatibility with IEC 60747-5-2 and UL 1577 certification.

Technical Context

The SI8442AA-C-IS1 implements capacitive isolation using on-chip RF modulation/demodulation across a silicon dioxide barrier, supporting bidirectional data transmission without start-up initialization. Its architecture includes independent enable inputs per side and integrated 85 Ω output impedance matching for controlled-impedance PCB trace routing.

It features precise timing performance: ≤1.5 ns pulse width distortion, ≤0.5 ns channel-to-channel skew, and ≤3.0 ns propagation delay skew at 5 V, making it suitable for synchronous sampling in isolated ADC interfaces and real-time feedback loops in power inverters.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	150 Mbps maximum - supports high-speed serial communication in motor control and industrial Ethernet PHY isolation.
Propagation Delay	3.0–9.5 ns - enables sub-10 ns timing-critical feedback paths in closed-loop power converters.
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	2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V legacy logic without level shifters.
CMTI	25 kV/µs minimum - ensures robust operation in high-dV/dt environments like IGBT gate drive circuits.
Operating Temp	–40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions at full 150 Mbps data rate.
Power @ 100 Mbps	11.8 mA per side at 5 V - ultra-low active power enables thermally constrained designs in sealed enclosures.

Pinout & Package

SI8442AA-C-IS1 is housed in a 16-pin wide-body SOIC package (package width 10.3 mm, creepage/clearance ≥8.0 mm), optimized for reinforced insulation compliance and high-voltage spacing in industrial PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VDD1	Primary-side supply	Provides power to input-side logic and isolation transmitter; accepts 2.70–5.5 V with bypass capacitor required.
GND1	Primary-side ground	Reference return for VDD1 and input signals; must be separated from secondary-side ground by isolation barrier.
EN1	Primary-side enable	Active-high control: drives outputs low when deasserted; enables power-gating of unused channels.
IN1–IN4	Input data channels	Digital CMOS inputs accepting 0.8 V / 2.0 V thresholds; compatible with 3.3 V and 5 V logic families.
VDD2	Secondary-side supply	Independent supply for output-side logic and receiver; supports different voltage than VDD1 (e.g., 3.3 V MCU side).
GND2	Secondary-side ground	Isolated reference for VDD2 and output signals; no electrical connection to GND1.
EN2	Secondary-side enable	Active-high control for output-side driver stage; decouples output behavior from primary-side activity.
OUT1–OUT4	Output data channels	CMOS outputs with 85 Ω nominal impedance; require external termination only for >50 MHz signals on long traces.

Key Features

Feature	Design Value
Quad-channel isolation	Four independent bidirectional data paths in single SOIC-16 package - reduces board space vs. discrete optocouplers or dual isolators.
No start-up initialization	Immediate data transmission after power-on (start-up time ≤40 µs) - eliminates boot-time delays in safety-critical power systems.
Precision timing	≤0.5 ns channel-to-channel skew and ≤1.5 ns pulse width distortion - preserves signal integrity in multi-channel synchronized acquisition.
AEC-Q100 qualified	Grade 1 qualification (–40 to +125 °C) - validated for automotive subsystems including battery monitoring and onboard chargers.
RoHS-compliant wide-body SOIC	10.3 mm body width with 8.0 mm creepage/clearance - meets IEC 60664-1 requirements for 600 V_RMS working voltage applications.

Applications

Industrial Motor Control	EV Battery Management
Use Scenario: Isolating PWM gate-drive signals between MCU and IGBT/SiC half-bridge drivers in servo inverters. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting four independent control signals with matched propagation delay and low skew. Use Value: Enables precise dead-time control and prevents shoot-through faults via sub-10 ns timing consistency across all four channels.	Use Scenario: Transmitting cell voltage and temperature telemetry from high-side battery monitor ICs to isolated MCU in 400–800 V traction packs. IC Role / Device Role / Timing Role: Reinforced-isolation data link carrying analog-to-digital conversion results across 500+ V potential difference. Use Value: Maintains 25 kV/µs CMTI immunity during fast transients from contactor switching, ensuring data integrity without corruption.
Isolated Switch-Mode Supply	Industrial PLC I/O Modules
Use Scenario: Providing feedback path for secondary-side voltage sensing in isolated DC-DC converters with synchronous rectification. IC Role / Device Role / Timing Role: High-speed digital isolator replacing optocoupler in TL431-based feedback loop with 150 Mbps capability. Use Value: Supports >1 MHz switching frequencies with <10 ns propagation delay, improving transient response and regulation accuracy.	Use Scenario: Isolating digital input/output lines between field-side sensors/actuators and backplane controller in modular PLC chassis. IC Role / Device Role / Timing Role: Four-channel isolator handling parallel status reporting and command distribution across multiple I/O slots. Use Value: Eliminates ground loops and noise coupling in electrically noisy factory environments while supporting hot-swap I/O module insertion.

Industrial Motor Control

EV Battery Management

Use Scenario: Isolating PWM gate-drive signals between MCU and IGBT/SiC half-bridge drivers in servo inverters.

IC Role / Device Role / Timing Role: Quad-channel isolator transmitting four independent control signals with matched propagation delay and low skew.

Use Value: Enables precise dead-time control and prevents shoot-through faults via sub-10 ns timing consistency across all four channels.

Use Scenario: Transmitting cell voltage and temperature telemetry from high-side battery monitor ICs to isolated MCU in 400–800 V traction packs.

IC Role / Device Role / Timing Role: Reinforced-isolation data link carrying analog-to-digital conversion results across 500+ V potential difference.

Use Value: Maintains 25 kV/µs CMTI immunity during fast transients from contactor switching, ensuring data integrity without corruption.

Isolated Switch-Mode Supply

Industrial PLC I/O Modules

Use Scenario: Providing feedback path for secondary-side voltage sensing in isolated DC-DC converters with synchronous rectification.

IC Role / Device Role / Timing Role: High-speed digital isolator replacing optocoupler in TL431-based feedback loop with 150 Mbps capability.

Use Value: Supports >1 MHz switching frequencies with <10 ns propagation delay, improving transient response and regulation accuracy.

Use Scenario: Isolating digital input/output lines between field-side sensors/actuators and backplane controller in modular PLC chassis.

IC Role / Device Role / Timing Role: Four-channel isolator handling parallel status reporting and command distribution across multiple I/O slots.

Use Value: Eliminates ground loops and noise coupling in electrically noisy factory environments while supporting hot-swap I/O module insertion.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM1402ARWZ	4-channel, 100 Mbps, 2.5 kV_RMS, SOIC-16 wide-body; uses iCoupler magnetic isolation; higher 10 ns max propagation delay.	Limited to 100 Mbps - unsuitable for >100 MHz clock forwarding or high-speed serial links requiring 150 Mbps.	Choose ADUM1402ARWZ if system design prioritizes legacy Analog Devices ecosystem compatibility over peak speed.
ISO6741QDWR	4-channel, 50 Mbps, 5 kV_RMS, SOIC-16 wide-body; capacitive isolation; AEC-Q100 Grade 0 (–40 to +150 °C); higher isolation rating.	Lower 50 Mbps data rate restricts use in high-bandwidth feedback or telemetry; wider temp range suits extreme under-hood locations.	Choose ISO6741QDWR where 5 kV_RMS isolation and extended temperature margin outweigh need for 150 Mbps throughput.

Compared with ADUM1402ARWZ and ISO6741QDWR, SI8442AA-C-IS1 uniquely balances 150 Mbps speed, 2.5 kV_RMS reinforced isolation, and –40 to +125 °C operation in a standard SOIC-16 footprint - making it optimal for next-generation industrial inverters and EV subsystems demanding both bandwidth and reliability.

Availability

SI8442AA-C-IS1 is available at Aetrix Electronics and suitable for industrial motor control, EV battery management, isolated switch-mode supplies, and PLC I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for SI8442AA-C-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 for wireless, automotive, and industrial markets.

The Si84xx family was engineered specifically for high-reliability, high-speed digital isolation in harsh electromagnetic environments - targeting applications where legacy optocouplers fail due to aging, speed limits, or temperature drift.

FAQ

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

The SI8442AA-C-IS1 supports up to 150 Mbps across all four channels simultaneously. This specification is guaranteed over the full operating temperature range (–40 to +125 °C) and supply voltage range (2.70–5.5 V), verified per Skyworks' characterization in Table 3 and Table 4 of the Rev. 1.7 datasheet. SI8442AA-C-IS1 achieves this using high-frequency RF modulation across its capacitive isolation barrier.

Does SI8442AA-C-IS1 require external components for basic operation?

No, SI8442AA-C-IS1 requires only VDD bypass capacitors (0.1 µF ceramic recommended per supply rail) for stable operation. Unlike optocouplers, it needs no pull-up resistors, level shifters, or external timing components. The SI8442AA-C-IS1 integrates internal termination, regulated biasing, and self-clocking circuitry - simplifying layout and reducing BOM count.

What safety certifications apply to SI8442AA-C-IS1?

SI8442AA-C-IS1 is certified to UL 1577 (2500 V_RMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (reinforced insulation). These certifications cover the wide-body SOIC package variant and are production-tested to 3000 V_RMS for 1 second. SI8442AA-C-IS1 meets creepage/clearance requirements per IEC 60664-1 for 600 V_RMS working voltage.

Can SI8442AA-C-IS1 operate with different supply voltages on each side?

Yes, SI8442AA-C-IS1 supports independent VDD1 and VDD2 supplies ranging from 2.70 V to 5.5 V each. This allows interfacing a 5 V microcontroller on the primary side with a 3.3 V FPGA or ADC on the secondary side without external level translation. SI8442AA-C-IS1 maintains full 150 Mbps performance and timing specifications across all valid supply combinations.

Is SI8442AA-C-IS1 suitable for automotive applications?

Yes, SI8442AA-C-IS1 is AEC-Q100 qualified (Grade 1: –40 to +125 °C) and used in automotive subsystems including battery management, onboard chargers, and motor control. Its 25 kV/µs CMTI, 2.5 kV_RMS isolation, and robust EMC performance meet stringent automotive EMC and functional safety requirements. Note that Skyworks marks the Si844x family as "Not Recommended for New Designs" - consult current Skyworks alternatives for greenfield projects.

SI8442AA-C-IS1 Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

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

Packaging:: Tube

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:: 1Mbps

Propagation Delay tpLH / tpHL (Max):: 35ns, 35ns

Pulse Width Distortion (Max):: 25ns

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

SI8442AA-C-IS1 FAQ

1.How can I place an order for SI8442AA-C-IS1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8442AA-C-IS1 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 SI8442AA-C-IS1 reliable?

The price and inventory of SI8442AA-C-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442AA-C-IS1 is usually 5 days.

3.What payment methods are accepted for SI8442AA-C-IS1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442AA-C-IS1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8442AA-C-IS1?

SI8442AA-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8442AA-C-IS1 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 SI8442AA-C-IS1?

For technical support, including SI8442AA-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442AA-C-IS1 requirements.

6.How does Aetrix verify that SI8442AA-C-IS1 is sourced from the original manufacturer or authorized distributors?

All SI8442AA-C-IS1 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 SI8442AA-C-IS1 meets industry standards.

7.What is the process for return or replacement of SI8442AA-C-IS1?

All SI8442AA-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8442AA-C-IS1, 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 SI8442AA-C-IS1 part is unused and in its original packaging.

Return procedure for SI8442AA-C-IS1:

1.Submit a request within 90 days.

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

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