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Skyworks Solutions Inc. SI8435BB-D-IS1R
- Part No.:
- SI8435BB-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8435BB-D-IS1R.pdf
- Description:
- DGTL ISO 2500VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
SI8435BB-D-IS1R 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 reinforced 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-D-IS1R datasheet, SI8435BB-D-IS1R pinout, SI8435BB-D-IS1R application, or SI8435BB-D-IS1R equivalent, key selection criteria include its 150 Mbps capability, 0.5 ns typical channel-to-channel skew, AEC-Q100 qualification, and compatibility with 3.3 V/5 V mixed-supply systems in safety-critical isolation barriers.
Technical Context
The SI8435BB-D-IS1R implements capacitive isolation using differential RF signaling across an on-chip SiO₂ barrier, enabling high-speed signal transmission without magnetic or optical coupling. Its architecture supports independent supply domains (VDD1/VDD2), true DC-coupled operation, and no start-up initialization-ensuring deterministic behavior at power-on.
All three channels are unidirectional and individually enabled via dedicated ENx pins. Timing performance is guaranteed across –40 °C to +125 °C at 150 Mbps, with CMTI >25 kV/µs and pulse width distortion ≤1.5 ns (typ), making it suitable for fast-switching gate drivers and isolated ADC interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables real-time feedback in servo drives and digital power controllers. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures tight timing alignment between isolated control and sensing paths. |
| Channel-Channel Skew | 0.5 ns (typ), ≤1.8 ns (max) - critical for synchronized multi-phase PWM or encoder signal isolation. |
| Isolation Rating | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, VDE 0884-2, and CSA 5A. |
| Supply Voltage Range | 2.70–5.5 V on both sides - supports interoperability with 3.3 V microcontrollers and 5 V analog front-ends. |
| Power Consumption | <6 mA per channel at 100 Mbps (5 V) - reduces thermal load in densely packed industrial modules. |
| Operating Temperature | –40 °C to +125 °C - validated for under-hood automotive and factory-floor industrial environments. |
Pinout & Package
SI8435BB-D-IS1R is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm creepage/clearance, rated for 2500 VRMS reinforced insulation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Provides power to input-side logic and channel 1–3 input receivers (pins 1, 2, 3). |
| GND1 | Primary-side ground | Reference for VDD1 and input signals; must be separated from GND2 by isolation barrier. |
| IN1–IN3 | Input signal terminals | Accept CMOS-level digital inputs (VIH ≥2.0 V, VIL ≤0.8 V); each maps to one isolated output. |
| EN1–EN3 | Channel enable inputs | Active-high enables; drive low to force corresponding output into high-impedance state. |
| VDD2 | Secondary-side supply | Power for output-side drivers (pins 10–12); independent of VDD1 for level-shifting capability. |
| GND2 | Secondary-side ground | Reference for VDD2 and outputs; galvanically isolated from GND1. |
| OUT1–OUT3 | Isolated output terminals | CMOS-compatible outputs (VOH ≥VDD2–0.4 V, VOL ≤0.4 V); drive loads up to 10 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Triple unidirectional channels | Enables simultaneous isolation of PWM, fault, and status signals in single-package space-constrained designs. |
| Ultra-low power at high speed | Consumes only 2.9–4.4 mA per side at 100 Mbps (5 V), reducing system-level heat dissipation. |
| High CMTI immunity | 25 kV/µs common-mode transient rejection prevents false triggering in noisy motor-drive environments. |
| DC-coupled & glitch-free | No start-up initialization or re-synchronization required; maintains signal integrity during brown-out conditions. |
| AEC-Q100 qualified | Validated for automotive applications including hybrid electric vehicle battery management and traction inverters. |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
|
Use Scenario: Isolating gate driver enable signals and current-sense feedback in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: SI8435BB-D-IS1R provides three independent, low-skew isolation paths for PWM, DESAT, and temperature fault signals. Use Value: Enables precise timing coordination (<1.8 ns skew) and noise immunity (>25 kV/µs) in high-dV/dt switching environments. |
Use Scenario: Transmitting error amplifier output across isolation barrier in isolated DC-DC converters with optocoupler replacement. IC Role / Device Role / Timing Role: SI8435BB-D-IS1R replaces aging optocouplers with faster, more stable, and temperature-invariant digital isolation. Use Value: Eliminates optocoupler CTR degradation and enables 150 Mbps closed-loop bandwidth for dynamic load regulation. |
| Automotive Battery Management | Isolated Data Acquisition |
|
Use Scenario: Isolating cell voltage monitoring and balancing commands between high-voltage battery pack and MCU in HEV/EV systems. IC Role / Device Role / Timing Role: SI8435BB-D-IS1R serves as the isolation interface for BMS analog front-end SPI bus and GPIO lines. Use Value: AEC-Q100 qualification and 125 °C operation ensure reliability in under-hood thermal environments. |
Use Scenario: Isolating serial interface (SPI/I²C) and trigger lines between isolated ADC/DAC and host processor in test equipment. IC Role / Device Role / Timing Role: SI8435BB-D-IS1R transmits synchronized sample clocks and conversion data across isolation boundary. Use Value: 0.5 ns typical channel skew preserves phase accuracy in multi-channel synchronized sampling systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM130N0BRZ | Triple-channel, 150 Mbps, 3.0–5.5 V supply, 2.5 kVRMS, SOIC-16 narrow body (4.01 mm creepage) | Limited to 105 °C max ambient; lacks AEC-Q100 qualification | Preferred where board space is constrained and automotive qualification is not required. |
| ISO6731FDWR | Triple-channel, 50 Mbps, 1.71–5.5 V, 5 kVRMS, SOIC-16 wide body (8.0 mm creepage) | Lower data rate; higher isolation rating but slower timing (25 ns max propagation delay) | Chosen when enhanced safety margin (5 kVRMS) outweighs need for 150 Mbps speed. |
Compared with ADUM130N0BRZ and ISO6731FDWR, the SI8435BB-D-IS1R uniquely combines AEC-Q100 qualification, 150 Mbps speed, and 125 °C operation in a wide-body SOIC-making it optimal for automotive and industrial systems demanding both performance and long-term reliability under thermal stress.
Availability
SI8435BB-D-IS1R is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and isolated power supply feedback requiring stable component supply and long-lifecycle support.
Supply support for SI8435BB-D-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 SI8435BB-D-IS1R belongs to Skyworks' Si84xx family of capacitive digital isolators, engineered for high-reliability isolation in automotive, industrial, and energy infrastructure applications where speed, low power, and safety certification are critical.
FAQ
What is the maximum data rate supported by the SI8435BB-D-IS1R?
The SI8435BB-D-IS1R supports a maximum data rate of 150 Mbps under specified operating conditions (VDD = 5 V, TA = –40 °C to +125 °C). This is confirmed in Table 3's timing characteristics for Si843xBx variants, where "Maximum Data Rate" is listed as 0–150 Mbps. The SI8435BB-D-IS1R is a "Bx" variant, as indicated by the "BB" suffix in the part number and verified by its 150 Mbps rating and sub-10 ns propagation delay.
Does the SI8435BB-D-IS1R require external components for basic operation?
No, the SI8435BB-D-IS1R 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 features no start-up initialization, operates DC-coupled, and maintains stable timing across temperature and voltage, as stated in the "Description" and "Features" sections of the datasheet.
What safety certifications apply to the SI8435BB-D-IS1R?
The SI8435BB-D-IS1R is certified to UL 1577 (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2), all covering reinforced insulation. These certifications are explicitly listed in Tables 6 and 7 and apply to the 2.5 kVRMS-rated devices, including SI8435BB-D-IS1R in its wide-body SOIC package.
How does the enable functionality work on the SI8435BB-D-IS1R?
Each of the three channels on the SI8435BB-D-IS1R has a dedicated active-high enable pin (EN1–EN3). When an ENx pin is driven low, the corresponding output (OUTx) enters a high-impedance state. Enable-to-data-valid delay is 5.0–8.0 ns (ten1), and enable-to-tri-state delay is 7.0–9.2 ns (ten2), as specified in Table 3's timing section for Si843xBx devices.
Is the SI8435BB-D-IS1R suitable for automotive applications?
Yes-the SI8435BB-D-IS1R is AEC-Q100 qualified (Grade 1: –40 °C to +125 °C), explicitly listed under "Features" and confirmed in Table 1's operating temperature specification. Its 125 °C ambient rating at full 150 Mbps data rate, combined with reinforced isolation and high CMTI, makes it suitable for hybrid electric vehicle battery management and traction inverter subsystems.
SI8435BB-D-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:
- 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-IS1R FAQ
1.How can I place an order for SI8435BB-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8435BB-D-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 SI8435BB-D-IS1R reliable?
The price and inventory of SI8435BB-D-IS1R 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-IS1R is usually 5 days.
3.What payment methods are accepted for SI8435BB-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8435BB-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8435BB-D-IS1R?
SI8435BB-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8435BB-D-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 SI8435BB-D-IS1R?
For technical support, including SI8435BB-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8435BB-D-IS1R requirements.
6.How does Aetrix verify that SI8435BB-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8435BB-D-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 SI8435BB-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8435BB-D-IS1R?
All SI8435BB-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8435BB-D-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 SI8435BB-D-IS1R part is unused and in its original packaging.
Return procedure for SI8435BB-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8435BB-D-IS1R 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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