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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8442AB-C-IS

Name: SI8442AB-C-IS
Brand: Skyworks Solutions Inc.
SKU: SI8442AB-C-IS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8442AB-C-IS

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: SI8442AB-C-IS.pdf

Description:: DIGITAL ISOLATOR 4CH 16SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,628

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Product details

Overview

SI8442AB-C-IS 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 CMTI - deployed in isolated ADC interfaces and motor control gate drivers requiring reinforced insulation.

For engineers reviewing the SI8442AB-C-IS datasheet, SI8442AB-C-IS pinout, SI8442AB-C-IS application, or SI8442AB-C-IS equivalent, this page delivers verified timing specs, safety certifications (UL 2500 VRMS, VDE IEC 60747-5-2), supply current at 2.7–5.5 V, and precise isolation performance for high-noise industrial and automotive subsystems.

Technical Context

The SI8442AB-C-IS implements capacitive isolation with on-chip RF modulation/demodulation across four independent bidirectional channels, enabling DC-to-150 Mbps signal transfer without start-up initialization. Its dual-supply architecture (VDD1/VDD2 = 2.7–5.5 V) supports asymmetric voltage operation and maintains stable timing over –40 to +125 °C.

Each channel features integrated 85 Ω output impedance, 6 ns minimum pulse width, and enable-controlled tri-state outputs with 5–8 ns enable-to-data timing. The device achieves reinforced insulation per IEC 60747-5-2 (VIORM = 560 V_PEAK) and meets AEC-Q100 Grade 1 requirements for automotive use.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - enables high-speed serial links in isolated power converters and real-time motor control feedback loops.
Propagation Delay	3.0–9.5 ns (typ/max) - ensures sub-10 ns timing accuracy critical for synchronous sampling in isolated ADC/DAC systems.
Channel-Channel Skew	0.5–1.8 ns (typ/max) - guarantees matched timing across all four channels for parallel data bus isolation.
Supply Current @ 100 Mbps	11.8 mA per side (2.7 V) / 14.8 mA per side (5 V) - enables low-power operation in battery-backed or thermally constrained modules.
Common-Mode Transient Immunity	25 kV/µs - suppresses noise coupling in high-dV/dt environments like IGBT gate drive circuits and SMPS primary-side control.
Isolation Voltage	2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2.
Operating Temperature	–40 to +125 °C - validated for continuous operation at full data rate in under-hood automotive and industrial ambient conditions.

Pinout & Package

SI8442AB-C-IS is housed in a 16-pin wide-body SOIC package (package outline per Skyworks Doc Rev. 1.7, Page 28), providing 8.0 mm creepage/clearance for reinforced insulation compliance. Pin functions are defined per Skyworks Si8440/41/42/45 datasheet Section 4 (Pin Descriptions).

Pin/Terminal	Circuit Role	Design Meaning
VDD1, VDD2	Primary and secondary side supply rails	Independent 2.7–5.5 V supplies enable level-shifting between domains; bypass capacitors required per datasheet layout guidelines.
GND1, GND2	Primary and secondary side ground references	Galvanically isolated grounds prevent ground-loop currents; PCB layout must maintain separation between GND1/GND2 planes.
IN1–IN4	Input signal terminals (primary side)	Accept CMOS-level signals; VIH ≥ 2.0 V, VIL ≤ 0.8 V - compatible with 3.3 V and 5 V logic families.
OUT1–OUT4	Output signal terminals (secondary side)	Drive loads up to 4 mA; VOH ≥ VDD2 – 0.4 V, VOL ≤ 0.4 V - supports direct connection to MCU GPIO or gate drivers.
EN1, EN2	Enable inputs for channel pairs	Active-high control: EN1 enables OUT1/OUT2, EN2 enables OUT3/OUT4; outputs go low when disabled (Revision C behavior).

Key Features

Feature	Design Value
Quad-channel isolation	Four independent, bidirectional signal paths in one SOIC-16 package - reduces BOM count and PCB area vs. discrete optocouplers.
No start-up initialization	Immediate data transmission after power-on (start-up time ≤ 40 µs) - eliminates boot delay in safety-critical real-time control loops.
Precision timing	Worst-case 9.5 ns propagation delay, 1.8 ns max channel skew, and 2.5 ns pulse width distortion - enables deterministic timing in servo drives.
Ultra-low power at high speed	11.8 mA per side at 100 Mbps and 2.7 V - cuts thermal load in dense isolation stacks for EV traction inverters.
AEC-Q100 qualified	Grade 1 (–40 to +125 °C) qualification - validates reliability for automotive applications including battery management and ADAS power domains.

Applications

Industrial Motor Control	Isolated ADC Interface
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stages of HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting gate control (IN1–IN4 → OUT1–OUT4) and receiving analog-to-digital converter status with sub-10 ns timing alignment. Use Value: Enables simultaneous switching of IGBTs/MOSFETs while rejecting >25 kV/µs transients from power stage switching noise.	Use Scenario: Bridging high-voltage sensor front-ends (e.g., shunt-based current measurement) to low-voltage microcontroller ADC inputs in energy metering and power quality analyzers. IC Role / Device Role / Timing Role: Transmitting digitized sensor data across isolation barrier with 0.5 ns channel-to-channel skew to preserve multi-channel phase coherence. Use Value: Maintains <1 LSB timing error in 16-bit sigma-delta ADC sampling, meeting IEC 62053-22 Class 0.2 accuracy requirements.
Automotive Battery Management	Isolated Switch-Mode Power Supply
Use Scenario: Isolating cell voltage monitoring and balancing signals between high-side battery stack and low-side MCU in EV battery packs. IC Role / Device Role / Timing Role: Four-channel data link carrying voltage readings and balance command signals across 2500 VRMS barrier with AEC-Q100 Grade 1 reliability. Use Value: Supports 125 °C ambient operation during fast charging, eliminating need for derating or thermal throttling in compact BMS modules.	Use Scenario: Providing feedback path from secondary-side voltage regulator to primary-side PWM controller in isolated DC-DC converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronization pulses with 6 ns minimum pulse width to sustain 1 MHz+ switching frequencies. Use Value: Enables stable regulation under dynamic load steps by preserving fast transient response across isolation boundary.

Industrial Motor Control

Isolated ADC Interface

Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stages of HVAC compressors and servo drives.

IC Role / Device Role / Timing Role: Quad-channel isolator transmitting gate control (IN1–IN4 → OUT1–OUT4) and receiving analog-to-digital converter status with sub-10 ns timing alignment.

Use Value: Enables simultaneous switching of IGBTs/MOSFETs while rejecting >25 kV/µs transients from power stage switching noise.

Use Scenario: Bridging high-voltage sensor front-ends (e.g., shunt-based current measurement) to low-voltage microcontroller ADC inputs in energy metering and power quality analyzers.

IC Role / Device Role / Timing Role: Transmitting digitized sensor data across isolation barrier with 0.5 ns channel-to-channel skew to preserve multi-channel phase coherence.

Use Value: Maintains <1 LSB timing error in 16-bit sigma-delta ADC sampling, meeting IEC 62053-22 Class 0.2 accuracy requirements.

Automotive Battery Management

Isolated Switch-Mode Power Supply

Use Scenario: Isolating cell voltage monitoring and balancing signals between high-side battery stack and low-side MCU in EV battery packs.

IC Role / Device Role / Timing Role: Four-channel data link carrying voltage readings and balance command signals across 2500 VRMS barrier with AEC-Q100 Grade 1 reliability.

Use Value: Supports 125 °C ambient operation during fast charging, eliminating need for derating or thermal throttling in compact BMS modules.

Use Scenario: Providing feedback path from secondary-side voltage regulator to primary-side PWM controller in isolated DC-DC converters for telecom and server PSUs.

IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronization pulses with 6 ns minimum pulse width to sustain 1 MHz+ switching frequencies.

Use Value: Enables stable regulation under dynamic load steps by preserving fast transient response across isolation boundary.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM140D0BRIZ	4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16 narrow body; higher 100 Mbps supply current (16.5 mA/side @ 5 V) vs. SI8442AB-C-IS (14.8 mA/side).	Narrow-body footprint (4.01 mm creepage) limits use in high-altitude or pollution-degree-3 environments where SI8442AB-C-IS wide-body (8.0 mm) is required.	Select ADUM140D0BRIZ only if PCB space is constrained and regulatory creepage requirements are ≤4.0 mm.
ISO6741QDWR	4-channel, 50 Mbps max, 5000 VRMS, SOIC-16 wide body; lower speed but higher isolation rating and integrated fault protection.	Targeted at safety-critical systems requiring SIL-2/IEC 61508 compliance - not suitable for 100+ Mbps motor control loops where SI8442AB-C-IS operates.	Choose ISO6741QDWR when functional safety certification outweighs data rate needs, e.g., in PLC safety I/O modules.

Compared with ADUM140D0BRIZ and ISO6741QDWR, SI8442AB-C-IS uniquely balances 150 Mbps speed, 2500 VRMS reinforced insulation, and 11.8–14.8 mA supply current at 2.7–5.5 V - making it optimal for thermally sensitive, high-noise industrial inverters where both bandwidth and robustness are non-negotiable.

Availability

SI8442AB-C-IS is available at Aetrix Electronics and suitable for industrial motor control, isolated ADC interfaces, automotive battery management systems, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.

Supply support for SI8442AB-C-IS 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 designed specifically for high-reliability galvanic isolation in noise-intensive power electronics, delivering superior CMTI, timing precision, and safety certification compared to legacy optocoupler and transformer-based alternatives.

FAQ

What is the maximum operating temperature for SI8442AB-C-IS at full 150 Mbps data rate?

The SI8442AB-C-IS is fully specified for continuous operation at 150 Mbps across –40 to +125 °C ambient temperature, with worst-case propagation delay and skew guaranteed within datasheet limits at 125 °C. This makes SI8442AB-C-IS suitable for under-hood automotive and high-temperature industrial environments without derating.

Does SI8442AB-C-IS require external components for basic operation?

SI8442AB-C-IS requires only VDD bypass capacitors (0.1 µF ceramic per supply rail) for stable operation - no external resistors, transformers, or timing components are needed. The device performs automatic start-up with no initialization sequence, simplifying system integration and reducing BOM count versus optocoupler-based solutions.

How does the enable functionality work on SI8442AB-C-IS?

SI8442AB-C-IS has two enable inputs: EN1 controls OUT1/OUT2, and EN2 controls OUT3/OUT4. When an enable pin is low, its associated outputs enter high-impedance state (tri-state). Enable-to-data valid delay is 5–8 ns, and enable-to-tri-state delay is 7–9.2 ns - enabling fast, synchronized channel gating in multi-zone isolation schemes.

Is SI8442AB-C-IS compliant with automotive reliability standards?

Yes, SI8442AB-C-IS is AEC-Q100 qualified Grade 1 (–40 to +125 °C), with 60-year lifetime at rated working voltage and full characterization across temperature, voltage, and data rate. It meets automotive ESD (HBM ±2 kV), latch-up immunity, and transient robustness requirements per Skyworks Revision C/D errata guidelines.

What safety certifications apply to SI8442AB-C-IS?

SI8442AB-C-IS carries UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (VIORM = 560 V_PEAK) certifications - all verified for the wide-body SOIC package. These cover reinforced insulation for industrial and automotive applications up to 600 VRMS working voltage.

SI8442AB-C-IS Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm 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:: 2500Vrms

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

SI8442AB-C-IS FAQ

1.How can I place an order for SI8442AB-C-IS through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8442AB-C-IS 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 SI8442AB-C-IS reliable?

The price and inventory of SI8442AB-C-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442AB-C-IS is usually 5 days.

3.What payment methods are accepted for SI8442AB-C-IS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442AB-C-IS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8442AB-C-IS?

SI8442AB-C-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8442AB-C-IS 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 SI8442AB-C-IS?

For technical support, including SI8442AB-C-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442AB-C-IS requirements.

6.How does Aetrix verify that SI8442AB-C-IS is sourced from the original manufacturer or authorized distributors?

All SI8442AB-C-IS 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 SI8442AB-C-IS meets industry standards.

7.What is the process for return or replacement of SI8442AB-C-IS?

All SI8442AB-C-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI8442AB-C-IS, 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 SI8442AB-C-IS part is unused and in its original packaging.

Return procedure for SI8442AB-C-IS:

1.Submit a request within 90 days.

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

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