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Skyworks Solutions Inc. SI8435BB-C-IS
- Part No.:
- SI8435BB-C-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8435BB-C-IS.pdf
- Description:
- DIGITAL ISOLATOR 3CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,767
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Product details
Overview
SI8435BB-C-IS from Skyworks Solutions is a triple-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, delivering 150 Mbps data rate, <9.5 ns worst-case propagation delay, and 2500 VRMS reinforced isolation. It operates across 2.70–5.5 V supply rails and supports industrial motor control, isolated ADC interfaces, and hybrid electric vehicle power inverters.
For engineers reviewing the SI8435BB-C-IS datasheet, SI8435BB-C-IS pinout, SI8435BB-C-IS application, or SI8435BB-C-IS equivalent, key selection criteria include its AEC-Q100 qualification, 0.5 ns typical channel-to-channel skew, 25 kV/µs common-mode transient immunity, and compatibility with 3.3 V and 5 V logic systems in high-noise environments.
Technical Context
The SI8435BB-C-IS implements capacitive coupling-based isolation with on-chip RF modulation/demodulation for signal transmission across the isolation barrier. Its architecture supports independent bidirectional or unidirectional channel configuration without external components beyond VDD bypass capacitors.
All three channels feature matched timing characteristics: <1.5 ns pulse width distortion, <3.0 ns propagation delay skew (P-P), and guaranteed operation up to 125 °C at full 150 Mbps data rate under 15 pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 150 Mbps - enables high-speed serial communication in isolated gate drivers and real-time control loops |
| Propagation Delay | 3.0–9.5 ns - ensures deterministic timing for feedback paths in switched-mode power supplies |
| Isolation Voltage | 2500 VRMS - meets reinforced insulation requirements per UL 1577, CSA 5A, and VDE 0884-2 |
| Supply Range | 2.70–5.5 V - supports interoperability with both 3.3 V microcontrollers and 5 V legacy peripherals |
| Channel-Channel Skew | 0.5 ns typical - critical for synchronized sampling across multiple isolated analog inputs |
| CMTI | 25 kV/µs - maintains signal integrity during fast-switching events in motor drives and inverters |
| Power @ 100 Mbps | <17.9 mA per side at 5 V - reduces thermal load in compact, sealed industrial enclosures |
Pinout & Package
SI8435BB-C-IS is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc #28) with 8.0 mm creepage and 8.0 mm clearance, certified for reinforced insulation up to 600 VRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Primary and secondary side power supplies | Independent 2.70–5.5 V rails enable level-shifting between isolated domains |
| GND1, GND2 | Primary and secondary side ground references | Galvanically separated grounds prevent ground-loop noise coupling |
| IN1–IN3 | Input signal terminals (primary side) | Accept CMOS/TTL logic levels; VIH ≥ 2.0 V, VIL ≤ 0.8 V |
| OUT1–OUT3 | Output signal terminals (secondary side) | Drive 15 pF loads with <5 ns rise/fall times; VOH ≥ VDD2 – 0.4 V |
| EN1, EN2 | Enable inputs for channel groups | Tri-state outputs when low; ten1 = 5–8 ns enable-to-valid delay |
| NC | No-connect pins (pins 10, 11, 15, 16) | Internally unused; must remain unconnected per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Triple-channel isolation | Three independent signal paths in one SOIC-16 footprint reduce board space vs. discrete optocouplers |
| AEC-Q100 qualified | Rated for automotive-grade reliability (Grade 1: –40 to 125 °C), validated for HEV/EV powertrain subsystems |
| Ultra-low power at speed | <6 mA per channel at 100 Mbps (5 V), enabling battery-powered or thermally constrained designs |
| Precision timing | 0.5 ns typical channel-to-channel skew and 1.5 ns pulse width distortion support time-critical feedback |
| No start-up initialization | Valid output within 40 µs of power application - eliminates boot-time delays in safety-critical systems |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
Use Scenario: Closed-loop field-oriented control of 3-phase PMSM motors using isolated current sensing and PWM feedback. IC Role / Device Role / Timing Role: Isolates gate driver enable signals and current-sense amplifier outputs while preserving sub-10 ns timing alignment across all three phases. Use Value: Enables precise torque ripple suppression via synchronized sampling and drive signal delivery across isolation boundary. |
Use Scenario: High-resolution sigma-delta ADC (e.g., AD7403) interfacing to MCU across isolation barrier in servo drives. IC Role / Device Role / Timing Role: Transmits 20+ MHz bitstream from isolated ADC while maintaining jitter below 1 LSB at 16-bit resolution. Use Value: Delivers <1.5 ns pulse width distortion and 25 kV/µs CMTI to preserve dynamic performance in noisy power stages. |
| Hybrid Electric Vehicle Inverter | Isolated Switch-Mode Supply |
Use Scenario: Isolation of high-side IGBT/SiC gate driver signals and fault reporting in traction inverter modules. IC Role / Device Role / Timing Role: Carries PWM commands and DESAT feedback across 2500 VRMS barrier with <9.5 ns propagation delay and <3 ns skew. Use Value: Supports 150 kHz switching frequencies with deterministic timing margins for safe short-circuit protection response. |
Use Scenario: Feedback path isolation in flyback or forward converters where primary-side controller monitors secondary-side output voltage. IC Role / Device Role / Timing Role: Transmits error amplifier output or opto-coupler replacement signal with <6 ns minimum pulse width capability. Use Value: Eliminates optocoupler aging and temperature drift while maintaining stable regulation under 150 Mbps burst-mode operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3401BRWZ | Quad-channel, 25 Mbps max, 30 ns propagation delay, 2500 VRMS isolation | Limited to lower-speed feedback loops; lacks AEC-Q100 qualification | Preferred for cost-sensitive industrial PLCs where 150 Mbps is unnecessary |
| ISO6731FDWR | Triple-channel, 50 Mbps max, 11 ns propagation delay, 5000 VRMS isolation | Higher isolation rating but lower speed; no AEC-Q100 certification | Suitable for medical or test equipment requiring higher withstand voltage over speed |
Compared with ADUM3401BRWZ and ISO6731FDWR, the SI8435BB-C-IS uniquely combines automotive qualification, 150 Mbps throughput, and sub-10 ns timing precision-making it optimal for HEV inverter gate drive and real-time motor control where speed, skew, and reliability are co-constrained.
Availability
SI8435BB-C-IS is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle inverters, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8435BB-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, with leadership in RF, timing, and isolation technologies.
The Si84xx family was engineered for high-reliability, high-speed digital isolation in automotive, industrial, and energy infrastructure applications-replacing optocouplers with robust, low-power, and temperature-stable alternatives.
FAQ
What is the maximum operating temperature for SI8435BB-C-IS at full 150 Mbps data rate?
The SI8435BB-C-IS is rated for continuous operation at –40 to 125 °C ambient temperature while sustaining 150 Mbps across all three channels with 15 pF load. This specification is verified per Table 1 in the datasheet and applies to both wide-body SOIC packages under recommended operating conditions (VDD = 2.70–5.5 V).
Does SI8435BB-C-IS support independent supply voltages on each side?
Yes, SI8435BB-C-IS supports fully independent VDD1 and VDD2 supplies ranging from 2.70 V to 5.5 V, enabling level translation between 3.3 V microcontrollers and 5 V peripheral interfaces. Each supply domain powers its respective side's logic and drivers without cross-coupling.
Is SI8435BB-C-IS pin-compatible with other members of the Si843x family?
SI8435BB-C-IS shares identical pinout and package dimensions with Si8430BB-C-IS and Si8431BB-C-IS, but differs in channel directionality and enable functionality. Pin compatibility is confirmed per Skyworks Package Outline #28 and Pin Descriptions section (page 25), though functional behavior must be verified per variant datasheet tables.
What safety certifications apply to SI8435BB-C-IS?
SI8435BB-C-IS carries UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2) certifications. These cover reinforced insulation up to 600 VRMS working voltage and are production-tested to 3000 VRMS for 1 second per regulatory note in Table 6.
How does the enable function operate on SI8435BB-C-IS?
SI8435BB-C-IS features two enable inputs (EN1, EN2) that place corresponding output groups into high-impedance state when low. Enable-to-data-valid delay is 5–8 ns (ten1), and enable-to-tri-state delay is 7–9.2 ns (ten2), as specified in Table 3 timing characteristics under 5 V operation.
SI8435BB-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:
- 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-IS FAQ
1.How can I place an order for SI8435BB-C-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8435BB-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 SI8435BB-C-IS reliable?
The price and inventory of SI8435BB-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 SI8435BB-C-IS is usually 5 days.
3.What payment methods are accepted for SI8435BB-C-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8435BB-C-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8435BB-C-IS?
SI8435BB-C-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8435BB-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 SI8435BB-C-IS?
For technical support, including SI8435BB-C-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8435BB-C-IS requirements.
6.How does Aetrix verify that SI8435BB-C-IS is sourced from the original manufacturer or authorized distributors?
All SI8435BB-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 SI8435BB-C-IS meets industry standards.
7.What is the process for return or replacement of SI8435BB-C-IS?
All SI8435BB-C-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI8435BB-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 SI8435BB-C-IS part is unused and in its original packaging.
Return procedure for SI8435BB-C-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8435BB-C-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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