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Skyworks Solutions Inc. SI8435BB-D-IS
- Part No.:
- SI8435BB-D-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8435BB-D-IS.pdf
- Description:
- DGTL ISO 2500VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
SI8435BB-D-IS from Skyworks Solutions is a triple-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, rated for 2500 VRMS isolation and supporting up to 150 Mbps data rate with worst-case propagation delay under 9.5 ns. It operates across 2.70–5.5 V supply rails on both sides and delivers <6 mA per channel at 100 Mbps (5 V), enabling high-speed signal isolation in motor control and isolated power supplies.
For engineers reviewing the SI8435BB-D-IS datasheet, SI8435BB-D-IS pinout, SI8435BB-D-IS application, or SI8435BB-D-IS equivalent, this page provides verified electrical specs, safety certifications (UL, CSA, VDE), timing performance at 150 Mbps, and real-world design context for industrial and automotive systems requiring reinforced insulation and AEC-Q100 qualification.
Technical Context
The SI8435BB-D-IS implements capacitive coupling-based digital isolation with three independent unidirectional channels, each featuring integrated output drivers and input receivers with precise edge detection. Its architecture eliminates start-up initialization and supports asymmetric supply operation (VDD1 ≠ VDD2) while maintaining stable timing across –40 to +125 °C.
It achieves 25 kV/µs common-mode transient immunity (CMTI), 0.5 ns typical channel-to-channel skew, and 1.5 ns pulse width distortion-enabling robust noise rejection in high-dV/dt environments such as inverters and isolated ADC interfaces. All channels include enable inputs for tri-state control with sub-10 ns enable-to-output response.
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 PWM feedback loops without timing bottlenecks. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables tight-loop timing in motor gate drivers and real-time control systems where sub-10 ns latency is critical. |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements for industrial mains-connected equipment and EV battery management subsystems. |
| Supply Range | 2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Power Consumption | <6 mA per channel at 100 Mbps (5 V) - reduces thermal load and extends battery life in portable isolated sensor nodes. |
| CMTI | 25 kV/µs - prevents false triggering during fast-switching events in SiC/GaN inverter gate drive circuits. |
| Operating Temp | –40 to +125 °C at full 150 Mbps - qualified for under-hood automotive and industrial ambient conditions without derating. |
| AEC-Q100 | Qualified - validated for automotive applications including hybrid electric vehicle battery monitoring and onboard chargers. |
Pinout & Package
SI8435BB-D-IS is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc Rev. 1.7, p.28), offering 8.0 mm creepage and clearance for reinforced insulation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Primary-side I/O and supply | Pins 1–8 include VDD1, GND1, EN1, EN2, EN3, and three input channels (IN1–IN3); enables local side control and power domain separation. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Secondary-side I/O and supply | Pins 9–16 include VDD2, GND2, and three output channels (OUT1–OUT3); provides galvanically isolated signal transmission with independent biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Triple unidirectional channels | Three independent isolated signal paths support simultaneous control of multiple subsystems (e.g., three-phase motor gate drivers). |
| No start-up initialization | Valid output data within 40 µs of power application - eliminates boot-time delays in safety-critical power-on sequences. |
| Enable-controlled tri-state outputs | EN1–EN3 pins allow dynamic channel disable with 7–9.2 ns transition to high-Z - supports bus sharing and hot-swap isolation. |
| Low pulse width distortion | 1.5 ns typical (|tPLH − tPHL|) - preserves duty cycle integrity for PWM and clock distribution applications. |
| 85 Ω nominal output impedance | Matches standard PCB trace impedances - minimizes reflections in high-speed routing without external termination resistors. |
| 60-year lifetime at rated voltage | Validated reliability under continuous 2500 VRMS stress - ensures long-term field operation in infrastructure and medical equipment. |
Applications
| Motor Control Systems | Isolated Switch-Mode Power Supplies |
|---|---|
|
Use Scenario: Isolating gate driver signals in three-phase inverter stages for industrial servo drives. IC Role / Device Role / Timing Role: SI8435BB-D-IS transmits PWM commands across isolation barrier with <9.5 ns propagation delay and <0.5 ns channel skew. Use Value: Enables precise phase alignment and reduces shoot-through risk in SiC-based inverters operating at >100 kHz switching frequencies. |
Use Scenario: Providing feedback isolation for secondary-side voltage sensing in LLC resonant converters. IC Role / Device Role / Timing Role: SI8435BB-D-IS carries error amplifier output across isolation boundary with 25 kV/µs CMTI immunity. Use Value: Maintains regulation accuracy under high dV/dt noise from primary-side switching, eliminating need for optocoupler compensation networks. |
| Industrial Automation PLCs | Hybrid Electric Vehicle Battery Management |
|
Use Scenario: Isolating digital I/O between fieldbus controllers and high-voltage I/O modules in factory automation racks. IC Role / Device Role / Timing Role: SI8435BB-D-IS handles discrete status and command signals with 150 Mbps capability and AEC-Q100 qualification. Use Value: Supports deterministic communication cycles in EtherCAT and PROFINET slave nodes without jitter-induced frame loss. |
Use Scenario: Isolating cell voltage measurement data from battery pack monitoring ICs to MCU in HEV traction battery packs. IC Role / Device Role / Timing Role: SI8435BB-D-IS transfers ADC conversion results across 2500 VRMS barrier with <10 ns timing uncertainty. Use Value: Ensures accurate state-of-charge estimation under EMI-rich under-hood conditions while meeting ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1311BRWZ | 3-channel, 100 Mbps max, 30 ns max propagation delay, 2500 VRMS isolation, SOIC-16 wide body | Limited to 100 Mbps and higher latency - suitable only where timing budget exceeds 20 ns | Choose when lower data rate suffices and legacy ADI ecosystem integration is prioritized over speed. |
| ISO7731FDWR | 3-channel, 100 Mbps max, 11 ns max propagation delay, 5000 VRMS isolation, SOIC-16 wide body | Higher isolation rating but no AEC-Q100 qualification; different enable logic polarity | Prefer for mains-connected industrial equipment needing 5 kVRMS, but avoid in automotive BMS due to missing AEC-Q100. |
Compared with ADUM1311BRWZ and ISO7731FDWR, SI8435BB-D-IS uniquely combines 150 Mbps throughput, AEC-Q100 qualification, and sub-10 ns propagation delay in a single wide-body SOIC package-making it optimal for next-generation EV inverters and high-bandwidth industrial controllers where timing margin and automotive compliance are non-negotiable.
Availability
SI8435BB-D-IS is available at Aetrix Electronics and suitable for motor control systems, isolated switch-mode power supplies, and hybrid electric vehicle battery management requiring stable component supply, long-term lifecycle support, and certified reinforced insulation.
Supply support for SI8435BB-D-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, with leadership in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
The SI84xx family was designed to replace optocouplers and older capacitive isolators in high-reliability, high-speed applications-delivering superior data rate, timing precision, and safety certification in compact SOIC packages.
FAQ
What is the maximum data rate supported by SI8435BB-D-IS?
The SI8435BB-D-IS supports a maximum data rate of 150 Mbps, verified across its full operating temperature range (–40 to +125 °C) and supply voltage range (2.70–5.5 V). This performance is specified for the 'Bx' variant in the Si843x family and confirmed in Tables 3–5 of the Skyworks datasheet Rev. 1.7. SI8435BB-D-IS maintains this rate with worst-case propagation delay under 9.5 ns and pulse width distortion below 2.5 ns.
Does SI8435BB-D-IS require external components for basic operation?
No, SI8435BB-D-IS requires only VDD bypass capacitors (typically 0.1 µF ceramic) on each supply rail-no external resistors, transformers, or timing components are needed. The device integrates all isolation circuitry, output drivers, and input receivers on-die, and starts delivering valid output data within 40 µs of power application without initialization firmware or configuration registers.
Is SI8435BB-D-IS qualified for automotive applications?
Yes, SI8435BB-D-IS is AEC-Q100 qualified (Grade 1, –40 to +125 °C), making it suitable for automotive applications including hybrid electric vehicle battery management, onboard chargers, and inverter control units. Its 2500 VRMS isolation rating, 25 kV/µs CMTI, and 60-year lifetime at rated voltage align with functional safety requirements for ASIL-B systems.
What safety certifications does SI8435BB-D-IS hold?
SI8435BB-D-IS is certified to UL 1577 (2500 VRMS), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (reinforced insulation). These approvals cover both wide-body and narrow-body SOIC variants and are production-tested to 3000 VRMS for 1 second per regulatory requirements.
How does the enable function operate on SI8435BB-D-IS?
SI8435BB-D-IS features three independent enable inputs (EN1–EN3) that place corresponding output channels into high-impedance state within 7–9.2 ns. When disabled, outputs float with leakage <±10 µA; when enabled, propagation delay remains consistent at 3.0–9.5 ns. This allows dynamic channel gating in shared-bus architectures without affecting timing of active channels.
SI8435BB-D-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:
- 3
- Inputs - Side 1/Side 2:
- 3/0
- 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
SI8435BB-D-IS FAQ
1.How can I place an order for SI8435BB-D-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8435BB-D-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 SI8435BB-D-IS reliable?
The price and inventory of SI8435BB-D-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8435BB-D-IS is usually 5 days.
3.What payment methods are accepted for SI8435BB-D-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8435BB-D-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8435BB-D-IS?
SI8435BB-D-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8435BB-D-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 SI8435BB-D-IS?
For technical support, including SI8435BB-D-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8435BB-D-IS requirements.
6.How does Aetrix verify that SI8435BB-D-IS is sourced from the original manufacturer or authorized distributors?
All SI8435BB-D-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 SI8435BB-D-IS meets industry standards.
7.What is the process for return or replacement of SI8435BB-D-IS?
All SI8435BB-D-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI8435BB-D-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 SI8435BB-D-IS part is unused and in its original packaging.
Return procedure for SI8435BB-D-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8435BB-D-IS Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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