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Skyworks Solutions Inc. SI8435BB-D-IS1
- Part No.:
- SI8435BB-D-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8435BB-D-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,364
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Product details
Overview
SI8435BB-D-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 across 2.70–5.5 V supply rails and delivers <6 mA per channel at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power systems.
For engineers reviewing the SI8435BB-D-IS1 datasheet, SI8435BB-D-IS1 pinout, SI8435BB-D-IS1 application, or SI8435BB-D-IS1 equivalent, this device is selected for designs requiring precise timing (<1.8 ns channel-channel skew), high CMTI (25 kV/µs), AEC-Q100 qualification, and reinforced insulation compliance with UL, CSA, and VDE standards.
Technical Context
The SI8435BB-D-IS1 implements capacitive isolation with on-chip RF modulation/demodulation, eliminating start-up initialization and ensuring deterministic latency. Its three independent bidirectional channels support asymmetric voltage operation (VDD1 ≠ VDD2) and feature integrated enable inputs for output tri-state control.
Designed for high-noise environments, it maintains stable timing performance across –40 to +125 °C at full 150 Mbps, with pulse width distortion ≤2.5 ns and propagation delay skew ≤3.0 ns (P-P). The device requires only 0.1 µF VDD bypass capacitors per side and no external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed serial interfaces like isolated SPI, RS-485 transceiver control, and gate driver feedback loops. |
| Propagation Delay | 3.0–9.5 ns - enables sub-10 ns timing-critical signal isolation in real-time motor control and power converter feedback paths. |
| Channel-Channel Skew | 0.5–1.8 ns - ensures tight synchronization across three isolated signals, critical for multi-phase inverter gate drive timing. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation in industrial and automotive systems operating up to 600 VRMS working voltage. |
| Supply Range | 2.70–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog/sensor domains without level-shifting. |
| CMTI | 25 kV/µs - rejects fast common-mode transients typical in IGBT/MOSFET switching nodes and motor drives. |
| Power @ 100 Mbps | <6 mA per channel at 5 V - reduces thermal load in dense PCB layouts and extends battery life in isolated sensor nodes. |
Pinout & Package
SI8435BB-D-IS1 is housed in a RoHS-compliant 16-pin wide-body SOIC package (package width = 7.5 mm, creepage/clearance = 8.0 mm), rated for 2500 VRMS isolation and qualified to AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power input for input-side logic and isolation transmitter; accepts 2.70–5.5 V with internal regulation. |
| GND1 | Primary-side ground | Reference return for VDD1 domain; must be separated from GND2 by isolation barrier. |
| EN1 | Primary-side enable | Active-high control that forces all primary-side outputs into high-impedance state when low. |
| IN1–IN3 | Input signal terminals | Accept CMOS/LVTTL logic levels; VIH ≥2.0 V, VIL ≤0.8 V; internally pulled down when floating. |
| OUT1–OUT3 | Isolated output terminals | Drive CMOS loads up to 10 mA; VOH ≥VDD2–0.4 V, VOL ≤0.4 V; 85 Ω nominal output impedance. |
| VDD2 | Secondary-side supply | Independent power rail for output-side logic and receiver; supports asymmetrical voltage operation. |
| GND2 | Secondary-side ground | Reference return for VDD2 domain; galvanically isolated from GND1; forms isolation barrier with VDD1/GND1. |
| EN2 | Secondary-side enable | Active-high control that forces all secondary-side outputs into high-impedance state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-channel isolation | Three independent, bidirectional signal paths in one package - reduces component count and board space vs. discrete opto-isolators. |
| No start-up initialization | Immediate functional operation after power-on - eliminates boot delay in safety-critical systems like EV battery management. |
| Precision timing | Worst-case 9.5 ns propagation delay with ≤1.8 ns channel-channel skew - enables synchronous sampling of isolated current/voltage sensors. |
| Ultra-low power at speed | <6 mA per channel at 100 Mbps (5 V) - lowers thermal design requirements in enclosed industrial enclosures. |
| AEC-Q100 qualification | Grade 1 (–40 to +125 °C) - validated for automotive subsystems including onboard chargers and traction inverter controls. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Triple-channel isolator transmitting complementary high-side/low-side gate signals and analog-to-digital converter data across isolation barrier. Use Value: Sub-10 ns propagation delay and ≤1.8 ns skew ensure precise dead-time control and prevent shoot-through in IGBT/MOSFET bridges. |
Use Scenario: Providing isolated feedback for voltage regulation and over-current protection in AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: Transmitting error amplifier output and fault signals from secondary to primary side while maintaining safety isolation. Use Value: 2500 VRMS reinforced insulation and 25 kV/µs CMTI withstand fast transients generated during transformer switching. |
| Hybrid Electric Vehicle Inverter | Isolated Data Acquisition |
Use Scenario: Isolating phase current sensing, temperature monitoring, and gate driver status in traction inverters. IC Role / Device Role / Timing Role: High-speed, low-skew isolation of ADC conversion results and digital control commands between MCU and power stage. Use Value: AEC-Q100 Grade 1 qualification and 125 °C ambient operation ensure reliability under under-hood thermal stress. |
Use Scenario: Isolating serial interface lines (SPI, I²C) between precision ADCs/DACs and host processors in test equipment. IC Role / Device Role / Timing Role: Preserving signal integrity and timing accuracy across isolation barrier for multi-channel synchronized sampling. Use Value: 150 Mbps capability supports high-throughput data streaming; low jitter enables accurate timestamping of sampled events. |
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, 50 Mbps max, 2500 VRMS, SOIC-16 wide body; higher propagation delay (25 ns typ), no AEC-Q100 rating. | Suitable for general-purpose industrial isolation but not automotive-grade timing-critical systems. | Choose ADUM3401BRWZ when quad-channel count is required and 150 Mbps speed is unnecessary. |
| ISO6731FDWR | Triple-channel, 50 Mbps max, 5000 VRMS, SOIC-16 wide body; higher isolation rating but lower speed and no AEC-Q100. | Better suited for high-voltage medical or grid-tie inverter applications where 5 kVRMS is mandated. | Choose ISO6731FDWR when enhanced isolation voltage outweighs need for 150 Mbps throughput. |
Compared with ADUM3401BRWZ and ISO6731FDWR, SI8435BB-D-IS1 uniquely combines automotive qualification, 150 Mbps speed, and sub-10 ns timing in a triple-channel configuration-making it optimal for next-generation EV powertrain and high-performance industrial servo drives.
Availability
SI8435BB-D-IS1 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-D-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 specifically 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 data rate supported by SI8435BB-D-IS1?
The SI8435BB-D-IS1 supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40 to +125 °C, CL = 15 pF). This is confirmed in Table 3 timing characteristics for Si843xBx variants, which include SI8435BB-D-IS1. Performance remains stable across the full temperature range without derating.
Does SI8435BB-D-IS1 require external components for basic operation?
No, SI8435BB-D-IS1 requires only 0.1 µF bypass capacitors on VDD1 and VDD2 pins-no external resistors, transformers, or timing components. The device uses on-chip RF modulation and does not need start-up initialization, making it truly plug-and-play for isolated digital signal transmission.
What safety certifications apply to SI8435BB-D-IS1?
SI8435BB-D-IS1 is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These cover reinforced insulation up to 600 VRMS working voltage and are verified for both wide-body SOIC packages and the SI8435B variant specifically.
Is SI8435BB-D-IS1 pin-compatible with other Si843x variants?
Yes, SI8435BB-D-IS1 shares identical pinout and package (16-pin wide-body SOIC) with all Si8430/31/35 family members, including SI8430BB-D-IS1 and SI8431BB-D-IS1. Channel count, enable functionality, and supply pin assignments are consistent across the family.
What is the channel configuration of SI8435BB-D-IS1?
SI8435BB-D-IS1 provides three independent, unidirectional digital isolation channels (IN1→OUT1, IN2→OUT2, IN3→OUT3), each with dedicated enable control (EN1, EN2). It does not support bidirectional auto-sensing per channel-directionality is fixed per pin pair as defined in the datasheet pin descriptions.
SI8435BB-D-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-D-IS1 FAQ
1.How can I place an order for SI8435BB-D-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8435BB-D-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-D-IS1 reliable?
The price and inventory of SI8435BB-D-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-D-IS1 is usually 5 days.
3.What payment methods are accepted for SI8435BB-D-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8435BB-D-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8435BB-D-IS1?
SI8435BB-D-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8435BB-D-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-D-IS1?
For technical support, including SI8435BB-D-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8435BB-D-IS1 requirements.
6.How does Aetrix verify that SI8435BB-D-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8435BB-D-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-D-IS1 meets industry standards.
7.What is the process for return or replacement of SI8435BB-D-IS1?
All SI8435BB-D-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8435BB-D-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-D-IS1 part is unused and in its original packaging.
Return procedure for SI8435BB-D-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8435BB-D-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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