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Skyworks Solutions Inc. SI8435BB-C-IS1
- Part No.:
- SI8435BB-C-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8435BB-C-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
SI8435BB-C-IS1 from Skyworks Solutions is a triple-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate, <9.5 ns worst-case propagation delay, and 2500 VRMS isolation. It operates from 2.70–5.5 V on both sides, delivers <6 mA per channel at 100 Mbps (5 V), and targets isolated communication in motor control and industrial power systems.
For engineers reviewing the SI8435BB-C-IS1 datasheet, SI8435BB-C-IS1 pinout, SI8435BB-C-IS1 application, or SI8435BB-C-IS1 equivalent, this page provides verified electrical specs, timing performance, safety certifications (UL, CSA, VDE), and real-world design context for high-speed, low-power isolation in harsh environments.
Technical Context
The SI8435BB-C-IS1 implements capacitive isolation with on-chip RF modulation/demodulation, enabling DC-to-150 Mbps operation without start-up initialization. Its dual-supply architecture (VDD1/VDD2) supports independent 2.70–5.5 V domains, and internal series termination (~85 Ω) minimizes external BOM requirements.
It features precise timing control: 0.5–1.8 ns channel-channel skew, 1.5 ns typical pulse width distortion, and 25 kV/µs common-mode transient immunity. Safety compliance includes UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK working voltage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed serial interfaces (e.g., SPI, RS-485 isolators, isolated ADC/DAC links) |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures tight timing budgets in real-time motor control and power inverter feedback loops |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements for industrial and automotive subsystems |
| Supply Range | 2.70–5.5 V on both sides - supports interoperability with 3.3 V and 5 V logic domains without level shifters |
| Power @ 100 Mbps | <6 mA per channel at 5 V - reduces thermal load in densely packed isolated gate drivers and SMPS controllers |
| CMTI | 25 kV/µs - maintains signal integrity during fast-switching transients in SiC/GaN inverter applications |
| Operating Temp | –40 to +125 °C - qualified for under-hood and industrial ambient conditions at full 150 Mbps data rate |
Pinout & Package
SI8435BB-C-IS1 is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc Rev. 1.7, p.28), providing 8.0 mm creepage/clearance for reinforced insulation. Pin functions are symmetric across three isolated channels plus enable and ground connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Side 1 inputs/outputs/enable/ground | Pins 1–3: Channel A/B/C inputs; Pin 4: EN1; Pins 5–8: VDD1, GND1, NC, NC - support unilateral or bidirectional signaling |
| 9, 10, 11, 12, 13, 14, 15, 16 | Side 2 inputs/outputs/enable/ground | Pins 9–11: Channel A/B/C outputs; Pin 12: EN2; Pins 13–16: VDD2, GND2, NC, NC - galvanically isolated domain with independent supply |
Key Features
| Feature | Design Value |
|---|---|
| Triple-channel isolation | Three independent data paths in one package - reduces PCB area vs. discrete single-channel isolators in 3-phase motor control or isolated ADC interfaces |
| No start-up initialization | Immediate data transmission after power-on - eliminates boot delay in safety-critical power supply monitoring and fault reporting |
| Ultra-low power at speed | <1.6 mA/channel at 1 Mbps (5 V) - extends battery life in isolated sensor nodes and portable test equipment |
| Precision timing | 0.5 ns typical channel-channel skew - preserves phase alignment in multi-axis servo drives and synchronized PWM generation |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - validates suitability for hybrid electric vehicle battery management and traction inverter interfaces |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating gate drive signals and current sense feedback in 3-phase inverter stacks using SiC MOSFETs. IC Role / Device Role / Timing Role: SI8435BB-C-IS1 provides three independent, high-CMTI signal paths for PWM inputs and analog feedback, maintaining timing coherence across phases. Use Value: Enables >100 kHz switching with sub-10 ns propagation delay matching, reducing dead-time uncertainty and improving efficiency. |
Use Scenario: Isolating primary-side controller feedback (voltage/current) to secondary-side regulation in LLC resonant converters. IC Role / Device Role / Timing Role: SI8435BB-C-IS1 transmits error amplifier output and synchronous rectifier timing across isolation barrier with minimal latency. Use Value: Supports fast transient response (<1 µs loop latency) while meeting 2500 VRMS safety requirements for medical and industrial AC/DC supplies. |
| Isolated Data Acquisition | Hybrid Electric Vehicle Systems |
Use Scenario: Isolating SPI bus between MCU and isolated delta-sigma ADC in high-voltage battery monitoring units. IC Role / Device Role / Timing Role: SI8435BB-C-IS1 carries clock, data-in, and data-out across isolation boundary with matched channel skew. Use Value: Preserves 16-bit resolution timing integrity at 10+ MSPS sampling rates, avoiding inter-symbol interference. |
Use Scenario: Signal isolation between vehicle control unit (VCU) and onboard charger (OBC) or DC-DC converter modules. IC Role / Device Role / Timing Role: SI8435BB-C-IS1 handles CAN physical layer enable control, status reporting, and analog sensing isolation. Use Value: Meets AEC-Q100 Grade 1 and reinforced insulation requirements for 400–800 V EV architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1310BRWZ | 3-channel, 100 Mbps max, 35 ns max propagation delay, 2500 VRMS, SOIC-16 wide body | Limited to 100 Mbps; higher propagation delay increases timing margin pressure in 150 Mbps designs | Prefer SI8435BB-C-IS1 where >100 Mbps or <10 ns delay is required; ADUM1310BRWZ suits cost-sensitive 50 Mbps industrial PLC I/O |
| ISO6731FDWR | 3-channel, 50 Mbps max, 2500 VRMS, SOIC-16 wide body, lower power at low speeds | Not rated for >50 Mbps; lacks AEC-Q100 qualification and 125 °C operation at full speed | Choose ISO6731FDWR only for low-data-rate, non-automotive applications where ultra-low standby current dominates |
Compared with ADUM1310BRWZ and ISO6731FDWR, SI8435BB-C-IS1 uniquely combines 150 Mbps capability, sub-10 ns timing, AEC-Q100 Grade 1, and 2.7–5.5 V dual-supply flexibility - making it the only option among the three qualified for high-speed, high-temp automotive and industrial inverters.
Availability
SI8435BB-C-IS1 is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and hybrid electric vehicle systems requiring stable component supply and long-term lifecycle support.
Supply support for SI8435BB-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, with leadership in RF, timing, and isolation technologies.
The Si84xx family was designed for high-reliability, low-power digital isolation in demanding industrial, automotive, and energy infrastructure applications - emphasizing timing precision, safety certification, and wide operating margins.
FAQ
What is the maximum data rate supported by SI8435BB-C-IS1?
The SI8435BB-C-IS1 supports up to 150 Mbps, verified across its full operating temperature range (–40 to +125 °C) and supply range (2.70–5.5 V). This rating applies to all three channels simultaneously under 15 pF load conditions, as confirmed in Skyworks' Rev. 1.7 datasheet Table 3 timing characteristics for Si843xBx variants.
Does SI8435BB-C-IS1 require external bypass capacitors?
Yes - SI8435BB-C-IS1 requires local 0.1 µF ceramic bypass capacitors on both VDD1 and VDD2 pins, placed as close as possible to the device. The datasheet explicitly states "only VDD bypass capacitors are required" and warns against omitting them, as instability or increased EMI susceptibility may result without proper decoupling.
Is SI8435BB-C-IS1 pin-compatible with other Si843x variants?
SI8435BB-C-IS1 shares the same 16-pin wide-body SOIC footprint and pinout with all Si8430/31/35 family members, including Si8435AB-C-IS1 and Si8435CB-C-IS1. However, functional differences exist: SI8435BB-C-IS1 is the Bx-speed grade (150 Mbps), whereas Ax-grade parts are limited to 1 Mbps. Pin compatibility does not imply functional interchangeability.
What safety certifications apply to SI8435BB-C-IS1?
SI8435BB-C-IS1 is certified to UL 1577 (2500 VRMS, File E257455), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK, File 5006301-4880-0001). These cover reinforced insulation for industrial and automotive applications, with production-tested isolation voltage of 3000 VRMS for 1 second.
Can SI8435BB-C-IS1 operate with different supply voltages on each side?
Yes - SI8435BB-C-IS1 supports independent supply rails: VDD1 (2.70–5.5 V) powers Side 1 circuitry, and VDD2 (2.70–5.5 V) powers Side 2. This enables level translation between 3.3 V microcontrollers and 5 V analog front-ends or gate drivers without external level shifters, as specified in Table 1 of the datasheet.
SI8435BB-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:
- 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-C-IS1 FAQ
1.How can I place an order for SI8435BB-C-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8435BB-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 SI8435BB-C-IS1 reliable?
The price and inventory of SI8435BB-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 SI8435BB-C-IS1 is usually 5 days.
3.What payment methods are accepted for SI8435BB-C-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8435BB-C-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8435BB-C-IS1?
SI8435BB-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8435BB-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 SI8435BB-C-IS1?
For technical support, including SI8435BB-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8435BB-C-IS1 requirements.
6.How does Aetrix verify that SI8435BB-C-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8435BB-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 SI8435BB-C-IS1 meets industry standards.
7.What is the process for return or replacement of SI8435BB-C-IS1?
All SI8435BB-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8435BB-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 SI8435BB-C-IS1 part is unused and in its original packaging.
Return procedure for SI8435BB-C-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8435BB-C-IS1 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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