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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8442BB-D-ISR

Name: SI8442BB-D-ISR
Brand: Skyworks Solutions Inc.
SKU: SI8442BB-D-ISR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8442BB-D-ISR

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

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

Datasheet:: SI8442BB-D-ISR.pdf

Description:: DGTL ISO 2500VRMS 4CH GP 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI8442BB-D-ISR 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 <11.8 mA per side at 100 Mbps (5 V), enabling high-speed isolation in motor control and isolated power supplies.

For engineers reviewing the SI8442BB-D-ISR datasheet, SI8442BB-D-ISR pinout, SI8442BB-D-ISR application, or SI8442BB-D-ISR equivalent, this page provides verified timing specs, safety certifications (UL, CSA, VDE), supply current behavior at 2.7 V/3.3 V/5 V, and precise channel-to-channel skew values critical for synchronous signal integrity in industrial inverters and isolated ADC interfaces.

Technical Context

The SI8442BB-D-ISR implements capacitive isolation with on-chip RF modulation/demodulation, delivering stable timing performance across –40 °C to +125 °C at 150 Mbps. Its dual-supply architecture (VDD1/VDD2) enables level-shifting between 2.7 V and 5.5 V domains while maintaining <1.5 ns pulse width distortion and <3 ns propagation delay skew.

Each of its four isolated channels features independent enable control, 85 Ω nominal output impedance, and supports tri-state output mode with 5–8 ns enable-to-data timing. The device achieves 2500 VRMS reinforced insulation with 8.0 mm clearance/creepage (wide-body SOIC) and meets IEC 60747-5-2, UL 1577, and CSA Component Notice 5A requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Data Rate	150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated gate driver feedback loops.
Propagation Delay (tPLH/tPHL)	3.0–9.5 ns - ensures sub-10 ns latency for real-time control in motor drives and power inverters.
Channel-Channel Skew	0.5–1.8 ns - guarantees tight synchronization across all four channels for multi-phase PWM or ADC sampling.
Supply Current @ 100 Mbps	11.8 mA per side (5 V) - enables low-power operation in battery-backed or energy-sensitive industrial systems.
Common-Mode Transient Immunity	25 kV/µs - maintains signal integrity in noisy environments such as variable-frequency drives and EV traction inverters.
Isolation Voltage	2500 VRMS (1 min) - certified for reinforced insulation in safety-critical applications per UL, CSA, and VDE standards.
Operating Temperature	–40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions without derating.

Pinout & Package

SI8442BB-D-ISR is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc #28), with 8.0 mm minimum creepage/clearance and 2500 VRMS isolation rating. Pin functions are symmetrically distributed across two sides to minimize PCB routing complexity in split-domain designs.

Pin/Terminal	Circuit Role	Design Meaning
VDD1, VDD2	Primary and secondary side supply inputs	Independent 2.7–5.5 V rails allow level translation; bypass capacitors required per side for noise suppression.
GND1, GND2	Primary and secondary side ground references	Galvanically isolated grounds prevent ground-loop currents and enable floating domain operation.
IN1–IN4	Input signal terminals (primary side)	Accept CMOS/TTL logic levels; VIH ≥ 2.0 V, VIL ≤ 0.8 V; input leakage ±10 µA ensures low standby current.
OUT1–OUT4	Output signal terminals (secondary side)	Drive 15 pF loads with 3.8–5.0 ns rise/fall times; VOH ≥ VDD–0.4 V, VOL ≤ 0.4 V at 4 mA.
EN1–EN4	Per-channel enable inputs	Active-high control; outputs go high-impedance when disabled; enable-to-data valid time = 5–8 ns.

Key Features

Feature	Design Value
Quad-channel isolation with independent enables	Enables selective channel shutdown in multi-signal systems (e.g., disable unused ADC channels to reduce power).
0.5 ns typical channel-channel skew	Supports synchronized sampling across multiple isolated sensors or simultaneous gate drive signals in 3-phase inverters.
25 kV/µs CMTI	Prevents data corruption during fast-switching events in SiC/GaN-based power converters with dV/dt > 50 V/ns.
150 Mbps data rate with <9.5 ns max propagation delay	Meets timing budgets for isolated SPI clock rates up to 37.5 MHz (4x oversampling) and real-time encoder interfaces.
AEC-Q100 qualified (Grade 1)	Validated for automotive subsystems including battery management and onboard chargers operating at 125 °C ambient.

Applications

Industrial Motor Control	Isolated Power Supply Feedback
Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase IGBT/SiC gate drivers in servo drives. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting complementary high-side/low-side gate signals and desaturation fault returns with <1.8 ns inter-channel skew. Use Value: Enables precise dead-time control and fast fault response (<10 ns detection latency) to prevent shoot-through in high-frequency inverters.	Use Scenario: Providing isolated voltage/current feedback from secondary side to primary-side controller in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting analog-derived digital error signals (e.g., from isolated sigma-delta ADC) with 150 Mbps capability and <9.5 ns delay. Use Value: Maintains loop stability at switching frequencies >1 MHz by minimizing isolation-induced phase lag in regulation path.
Automotive Onboard Charger	Isolated Data Acquisition
Use Scenario: Isolating CAN communication lines and HV sensing signals in bidirectional OBC units compliant with ISO 26262 ASIL-B. IC Role / Device Role / Timing Role: Delivering reinforced insulation (2500 VRMS) and AEC-Q100 Grade 1 qualification for 125 °C operation near HV components. Use Value: Eliminates need for external isolation components in compact OBC designs while meeting automotive safety certification requirements.	Use Scenario: Interfacing isolated 24-bit delta-sigma ADCs to host processor in precision test equipment and grid-tied energy meters. IC Role / Device Role / Timing Role: Transporting synchronized multi-channel conversion results with <0.5 ns channel skew to preserve phase coherence across CT/PT inputs. Use Value: Achieves <100 dB SNR in isolated measurement paths by eliminating timing jitter-induced harmonic distortion.

Industrial Motor Control

Isolated Power Supply Feedback

Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase IGBT/SiC gate drivers in servo drives.

IC Role / Device Role / Timing Role: Quad-channel isolator transmitting complementary high-side/low-side gate signals and desaturation fault returns with <1.8 ns inter-channel skew.

Use Value: Enables precise dead-time control and fast fault response (<10 ns detection latency) to prevent shoot-through in high-frequency inverters.

Use Scenario: Providing isolated voltage/current feedback from secondary side to primary-side controller in LLC resonant converters.

IC Role / Device Role / Timing Role: Transmitting analog-derived digital error signals (e.g., from isolated sigma-delta ADC) with 150 Mbps capability and <9.5 ns delay.

Use Value: Maintains loop stability at switching frequencies >1 MHz by minimizing isolation-induced phase lag in regulation path.

Automotive Onboard Charger

Isolated Data Acquisition

Use Scenario: Isolating CAN communication lines and HV sensing signals in bidirectional OBC units compliant with ISO 26262 ASIL-B.

IC Role / Device Role / Timing Role: Delivering reinforced insulation (2500 VRMS) and AEC-Q100 Grade 1 qualification for 125 °C operation near HV components.

Use Value: Eliminates need for external isolation components in compact OBC designs while meeting automotive safety certification requirements.

Use Scenario: Interfacing isolated 24-bit delta-sigma ADCs to host processor in precision test equipment and grid-tied energy meters.

IC Role / Device Role / Timing Role: Transporting synchronized multi-channel conversion results with <0.5 ns channel skew to preserve phase coherence across CT/PT inputs.

Use Value: Achieves <100 dB SNR in isolated measurement paths by eliminating timing jitter-induced harmonic distortion.

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-16WB; higher 13.5 mA supply current at 100 Mbps (5 V); no AEC-Q100 qualification.	Targeted at industrial automation where automotive qualification is not required; lacks grade-1 temperature support.	Choose ADUM140D0BRWZ if legacy Analog Devices design ecosystem or specific layout compatibility is prioritized over automotive qualification.
ISO6741QDWR	4-channel, 50 Mbps max, 5000 VRMS, SOIC-16WB; lower speed but higher isolation rating; 10.5 mA @ 50 Mbps (5 V); AEC-Q100 qualified.	Suitable for high-isolation, lower-speed applications like HV battery monitoring where 150 Mbps is unnecessary.	Choose ISO6741QDWR when working-voltage requirements exceed 2500 VRMS and system data rates stay below 50 Mbps.

Compared with ADUM140D0BRWZ and ISO6741QDWR, SI8442BB-D-ISR uniquely balances 150 Mbps speed, AEC-Q100 Grade 1 qualification, and 2500 VRMS isolation in a single wide-body SOIC package-making it optimal for space-constrained automotive and industrial inverters requiring both high bandwidth and safety compliance.

Availability

SI8442BB-D-ISR is available at Aetrix Electronics and suitable for industrial motor control, automotive onboard chargers, and isolated power supply feedback requiring stable component supply and long-term lifecycle support.

Supply support for SI8442BB-D-ISR 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-reliability industrial and automotive systems, delivering superior speed, power efficiency, and lifetime stability through capacitive isolation architecture.

FAQ

What is the maximum data rate supported by SI8442BB-D-ISR?

The SI8442BB-D-ISR supports a maximum data rate of 150 Mbps, verified across the full operating temperature range (–40 °C to +125 °C) and supply voltages (2.7 V to 5.5 V). This specification applies specifically to the 'B' variant (e.g., SI8442BB-D-ISR) as confirmed in Tables 3–5 of the Skyworks datasheet Rev. 1.7, distinguishing it from the 1 Mbps 'A' variant in the same family.

Does SI8442BB-D-ISR require external start-up initialization?

No, SI8442BB-D-ISR does not require start-up initialization. The device begins transmitting valid data within 15–40 µs after power application (tSU), with no firmware or configuration sequence needed. This zero-initialization behavior is explicitly stated in the Features section and confirmed in Table 3–5 timing notes for SI844xBx variants.

What safety certifications apply to SI8442BB-D-ISR?

SI8442BB-D-ISR holds UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 certifications. These cover reinforced insulation up to 2500 VRMS for 1 minute, with production testing at 3000 VRMS. Certification validity is tied to the wide-body SOIC package and applies to all Si844xBx devices per Table 6 and regulatory summary on page 14.

How does SI8442BB-D-ISR handle supply voltage mismatch between VDD1 and VDD2?

SI8442BB-D-ISR supports independent 2.7–5.5 V operation on VDD1 and VDD2, enabling true level-shifting (e.g., 3.3 V MCU to 5 V gate driver). Electrical characteristics-including VIH/VIL thresholds, VOH/VOL levels, and timing-are guaranteed across all combinations within this range, as validated in Tables 3–5 for 2.7 V, 3.3 V, and 5 V dual-rail configurations.

Is SI8442BB-D-ISR pin-compatible with other Si844x variants?

Yes, SI8442BB-D-ISR shares identical pinout and package (16-pin wide-body SOIC) with all Si8440/41/42/45 devices, including SI8442AB-D-ISR and SI8442BB-D-IS. Pin compatibility is confirmed in Skyworks' Package Outline (page 28) and Pin Descriptions (page 25), ensuring drop-in replacement within the same speed grade and channel count.

SI8442BB-D-ISR Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

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

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

SI8442BB-D-ISR FAQ

1.How can I place an order for SI8442BB-D-ISR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8442BB-D-ISR 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 SI8442BB-D-ISR reliable?

The price and inventory of SI8442BB-D-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8442BB-D-ISR is usually 5 days.

3.What payment methods are accepted for SI8442BB-D-ISR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8442BB-D-ISR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8442BB-D-ISR?

SI8442BB-D-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8442BB-D-ISR 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 SI8442BB-D-ISR?

For technical support, including SI8442BB-D-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8442BB-D-ISR requirements.

6.How does Aetrix verify that SI8442BB-D-ISR is sourced from the original manufacturer or authorized distributors?

All SI8442BB-D-ISR 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 SI8442BB-D-ISR meets industry standards.

7.What is the process for return or replacement of SI8442BB-D-ISR?

All SI8442BB-D-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8442BB-D-ISR, 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 SI8442BB-D-ISR part is unused and in its original packaging.

Return procedure for SI8442BB-D-ISR:

1.Submit a request within 90 days.

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

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