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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8441BA-C-IS1R

Name: SI8441BA-C-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI8441BA-C-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8441BA-C-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

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

Datasheet:: SI8441BA-C-IS1R.pdf

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

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Product details

Overview

SI8441BA-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 2.7–5.5 V supply rails and delivers <8.0 mA per channel at 100 Mbps (5 V), enabling high-speed isolation in motor control and isolated ADC interfaces.

For engineers reviewing the SI8441BA-C-IS1R datasheet, SI8441BA-C-IS1R pinout, SI8441BA-C-IS1R application, or SI8441BA-C-IS1R equivalent, key selection criteria include its 150 Mbps capability, AEC-Q100 qualification, 2.5 kVRMS reinforced insulation, and compatibility with industrial automation and hybrid electric vehicle subsystems requiring precise timing and high CMTI.

Technical Context

The SI8441BA-C-IS1R implements capacitive isolation with on-chip RF modulation/demodulation for signal transfer across the isolation barrier. Its four independent unidirectional channels support asymmetric voltage operation (VDD1 ≠ VDD2) and feature integrated enable inputs that place outputs in high-impedance state with 5–8 ns enable-to-data timing.

It achieves stable timing performance over –40°C to +125°C at full 150 Mbps, with pulse width distortion ≤2.5 ns and output rise/fall times ≤6.5 ns (2.7 V) or ≤5.0 ns (5 V). The device requires only VDD bypass capacitors-no external components-for operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and real-time feedback loops.
Propagation Delay	3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical sampling in isolated gate drivers and ADC synchronization.
Channel-Channel Skew	0.5–1.8 ns (typ/max) - ensures tight alignment of multi-channel signals in motor phase control and encoder interfaces.
Common-Mode Transient Immunity	25 kV/µs - maintains signal integrity in noisy power electronics environments such as inverters and SMPS.
Supply Voltage Range	2.70–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters.
Isolation Rating	2500 VRMS (1 min) - certified to UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2 for reinforced insulation.
Power Consumption	<8.0 mA per channel @ 100 Mbps, 5 V - reduces thermal load and enables compact, fanless industrial designs.

Pinout & Package

SI8441BA-C-IS1R is housed in a 16-pin wide-body SOIC package (WB SOIC-16), with creepage/clearance ≥8.0 mm and reinforced insulation rated to 2500 VRMS. Pin numbering follows standard SOIC convention (pin 1 = top-left corner, notch indicator).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Primary-side input channels A–D	Digital logic inputs referenced to VDD1; accept 2.0–5.5 V high-level signals.
5, 6, 7, 8	Primary-side ground (GND1)	Return path for VDD1 supplies and input-side circuitry; must be low-impedance.
9, 10, 11, 12	Secondary-side output channels A–D	CMOS-compatible outputs referenced to VDD2; drive loads up to 10 mA.
13, 14, 15, 16	Secondary-side ground (GND2)	Isolated return path for VDD2 and output-side circuitry; galvanically separated from GND1.

Key Features

Feature	Design Value
Ultra-low power at high speed	<8.0 mA per channel @ 100 Mbps (5 V), enabling energy-efficient isolation in battery-backed or thermally constrained systems.
Precision timing performance	0.5 ns typical channel-channel skew and 1.5 ns typical pulse width distortion ensure deterministic signal alignment in closed-loop control.
AEC-Q100 qualified	Qualified to Grade 1 (–40°C to +125°C), supporting deployment in automotive powertrain and charging subsystems.
No start-up initialization	Valid output data within 15–40 µs of power application - eliminates boot-time delays in safety-critical systems.
Enable-controlled tri-state outputs	ENx pins allow dynamic disabling of secondary-side outputs with 5–8 ns enable-to-tri-state response for bus sharing or fault containment.

Applications

Industrial Motor Control	Isolated Data Acquisition
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback between MCU and three-phase inverter stage. IC Role / Device Role / Timing Role: Quad-channel digital isolator providing independent, low-skew isolation for upper/lower gate drivers and analog-to-digital converter (ADC) serial interface lines. Use Value: Enables simultaneous switching with <1.8 ns inter-channel skew, reducing shoot-through risk while maintaining 150 Mbps SPI clock integrity for real-time current monitoring.	Use Scenario: Isolating high-resolution sigma-delta ADC outputs (e.g., ADS131M04) from host processor in precision power metering. IC Role / Device Role / Timing Role: Unidirectional isolator transmitting serialized conversion data and frame sync signals across isolation barrier with minimal jitter. Use Value: 25 kV/µs CMTI prevents data corruption during fast transients in mains-connected equipment; 6 ns minimum pulse width supports high oversampling rates.
Hybrid Electric Vehicle Onboard Charger	Programmable Logic Controller I/O Module
Use Scenario: Isolating communication between primary-side AC/DC controller and secondary-side DC/DC regulation stage in bidirectional OBC. IC Role / Device Role / Timing Role: High-reliability isolator carrying UART, fault reporting, and enable signals across 2500 VRMS barrier under automotive temperature stress. Use Value: AEC-Q100 Grade 1 qualification and 60-year life at rated voltage ensure long-term reliability in harsh under-hood environments.	Use Scenario: Providing channel-isolated digital input conditioning for 24 V DC field sensors in modular PLC backplanes. IC Role / Device Role / Timing Role: Four independent input isolators converting industrial logic levels to 3.3 V microcontroller-compatible signals with noise rejection. Use Value: 2.7–5.5 V dual-supply flexibility allows direct connection to both sensor-side 24 V LDOs and controller-side 3.3 V rails without external level translation.

Industrial Motor Control

Isolated Data Acquisition

Use Scenario: Isolating PWM gate-drive signals and current-sense feedback between MCU and three-phase inverter stage.

IC Role / Device Role / Timing Role: Quad-channel digital isolator providing independent, low-skew isolation for upper/lower gate drivers and analog-to-digital converter (ADC) serial interface lines.

Use Value: Enables simultaneous switching with <1.8 ns inter-channel skew, reducing shoot-through risk while maintaining 150 Mbps SPI clock integrity for real-time current monitoring.

Use Scenario: Isolating high-resolution sigma-delta ADC outputs (e.g., ADS131M04) from host processor in precision power metering.

IC Role / Device Role / Timing Role: Unidirectional isolator transmitting serialized conversion data and frame sync signals across isolation barrier with minimal jitter.

Use Value: 25 kV/µs CMTI prevents data corruption during fast transients in mains-connected equipment; 6 ns minimum pulse width supports high oversampling rates.

Hybrid Electric Vehicle Onboard Charger

Programmable Logic Controller I/O Module

Use Scenario: Isolating communication between primary-side AC/DC controller and secondary-side DC/DC regulation stage in bidirectional OBC.

IC Role / Device Role / Timing Role: High-reliability isolator carrying UART, fault reporting, and enable signals across 2500 VRMS barrier under automotive temperature stress.

Use Value: AEC-Q100 Grade 1 qualification and 60-year life at rated voltage ensure long-term reliability in harsh under-hood environments.

Use Scenario: Providing channel-isolated digital input conditioning for 24 V DC field sensors in modular PLC backplanes.

IC Role / Device Role / Timing Role: Four independent input isolators converting industrial logic levels to 3.3 V microcontroller-compatible signals with noise rejection.

Use Value: 2.7–5.5 V dual-supply flexibility allows direct connection to both sensor-side 24 V LDOs and controller-side 3.3 V rails without external level translation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM140D0BRWZ	4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16 wide body; higher typical supply current (9.3 mA @ 100 Mbps, 5 V) and 3 ns max channel skew.	Same isolation rating and data rate, but lacks AEC-Q100 qualification and has lower CMTI (100 kV/µs typical, not guaranteed min).	Preferred where automotive qualification is unnecessary and higher CMTI margin is not required.
ISO6741QDWR	4-channel, 50 Mbps, 5000 VRMS, SOIC-16 wide body; lower speed, higher isolation, 3.0–5.5 V supply, 10 kV/µs CMTI min.	Targets high-voltage safety-critical systems (e.g., medical, grid-tie inverters) where 150 Mbps is not needed but 5 kVRMS is mandatory.	Select when working voltage exceeds 2500 VRMS or regulatory requirements demand higher test voltage.

Compared with ADUM140D0BRWZ and ISO6741QDWR, the SI8441BA-C-IS1R uniquely balances 150 Mbps speed, AEC-Q100 qualification, and 25 kV/µs guaranteed CMTI in a cost-optimized wide-body SOIC-making it optimal for automotive and industrial real-time control where timing precision and noise resilience are co-constrained.

Availability

SI8441BA-C-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle onboard chargers, and isolated data acquisition systems requiring stable component supply and long-lifecycle support.

Supply support for SI8441BA-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 designed to replace optocouplers in high-speed, low-power, and high-reliability isolation applications-targeting industrial automation, automotive electrification, and energy infrastructure where precision timing and robustness are critical.

FAQ

What is the maximum operating temperature for SI8441BA-C-IS1R at full 150 Mbps data rate?

The SI8441BA-C-IS1R is specified for continuous operation at –40°C to +125°C ambient temperature while sustaining 150 Mbps across all four channels. This rating is validated per Table 1 in the datasheet under 15 pF load and 5 V supply conditions, and applies to both wide-body SOIC package variants.

Does SI8441BA-C-IS1R support bidirectional communication on individual channels?

No, SI8441BA-C-IS1R provides four unidirectional channels only-pins 1–4 are dedicated inputs (primary side), and pins 9–12 are dedicated outputs (secondary side). Bidirectional signaling requires external logic or separate transmit/receive isolator pairs; the device does not integrate auto-direction detection or half-duplex control.

What safety certifications apply specifically to SI8441BA-C-IS1R?

SI8441BA-C-IS1R carries UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1 reinforced insulation), and VDE IEC 60747-5-2 (560 Vpeak working voltage) certifications. These are production-tested per revision C/D specifications and documented in Skyworks' certification files E257455, 232873, and 5006301-4880-0001.

How does the enable function operate on SI8441BA-C-IS1R?

Each channel has a dedicated enable input (EN1–EN4, pins 13–16 per functional description): driving ENx low places the corresponding output (OUTx) in high-impedance state within 7–9.2 ns. When ENx is high, OUTx follows INx with propagation delay of 3–9.5 ns. No pull-up/pull-down resistors are required-the enable inputs are internally biased.

Is SI8441BA-C-IS1R pin-compatible with other members of the Si8440/41/42/45 family?

Yes-SI8441BA-C-IS1R shares identical pinout, package dimensions, and footprint with all Si844xAx and Si844xBx variants in the wide-body SOIC-16 configuration. However, data rate capability differs: SI8441BA-C-IS1R supports 150 Mbps (B-grade), whereas Si8441AA-C-IS1R is limited to 1 Mbps (A-grade); electrical behavior and timing specs vary accordingly.

SI8441BA-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:: 3/1

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

SI8441BA-C-IS1R FAQ

1.How can I place an order for SI8441BA-C-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8441BA-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 SI8441BA-C-IS1R reliable?

The price and inventory of SI8441BA-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 SI8441BA-C-IS1R is usually 5 days.

3.What payment methods are accepted for SI8441BA-C-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8441BA-C-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8441BA-C-IS1R?

SI8441BA-C-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8441BA-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 SI8441BA-C-IS1R?

For technical support, including SI8441BA-C-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8441BA-C-IS1R requirements.

6.How does Aetrix verify that SI8441BA-C-IS1R is sourced from the original manufacturer or authorized distributors?

All SI8441BA-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 SI8441BA-C-IS1R meets industry standards.

7.What is the process for return or replacement of SI8441BA-C-IS1R?

All SI8441BA-C-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8441BA-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 SI8441BA-C-IS1R part is unused and in its original packaging.

Return procedure for SI8441BA-C-IS1R:

1.Submit a request within 90 days.

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

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