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Skyworks Solutions Inc. SI86SS41BE-IS2R
- Part No.:
- SI86SS41BE-IS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SS41BE-IS2R.pdf
- Description:
- 6.0 KVRMS SPI COMPATIBLE ISOLATO
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
SI86SS41BE-IS2R from Skyworks Solutions is a 4-channel SPI digital isolator with reinforced isolation, designed for isolated microcontroller-to-peripheral communication in industrial and automotive systems. It supports up to 150 Mbps data rate, features 10 ns typical propagation delay, 6000 VRMS isolation rating, and operates across –40 to 125 °C with 2.25–5.5 V dual supply rails.
For engineers reviewing the SI86SS41BE-IS2R datasheet, SI86SS41BE-IS2R pinout, SI86SS41BE-IS2R application, or SI86SS41BE-IS2R equivalent, this page delivers verified functional architecture, exact pin roles, real-world use cases in isolated ADC interfaces and motor control gate drivers, and confirmed alternative parts with documented differences in SPI channel count and reset capability.
Technical Context
The SI86SS41BE-IS2R implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its dedicated SPI interface includes isolated MISO/MOSI/CLK/CS signals on both sides, with no direction control or reset pins - distinguishing it from Si86SS51 and Si86SQ44 variants.
It uses Schmitt-trigger + CMOS threshold inputs for noise immunity and supports fail-safe default-low output during unpowered conditions. The device lacks sleep mode (SMb) and reset (RST/ISO_RST) functionality, confirming its role as a basic 4-channel SPI isolator without auxiliary control channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed SPI clock rates up to 75 MHz with full-duplex timing margin. |
| Propagation Delay | 10 ns typical - enables sub-100 ns round-trip latency for time-critical feedback loops. |
| Isolation Rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for industrial safety. |
| Supply Voltage | 2.25–5.5 V per side - allows direct interfacing with 3.3 V and 5 V logic domains without level shifters. |
| Operating Temp | –40 to 125 °C - qualified for under-hood automotive and industrial motor drive environments. |
| CMTI | 100 kV/µs min - ensures reliable operation in high dv/dt noise environments like inverters and SMPS. |
| Fail-Safe Mode | Default low output - guarantees known state on isolated side when main-side supply fails. |
Pinout & Package
SI86SS41BE-IS2R is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage), supporting 6000 VRMS isolation. Pin functions are validated per Figure 5 and Table 2 of Skyworks datasheet 206553B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Main-side power domain | Supplies controller-side SPI interface (MCSb, MCLK, MO, MI); bypass requires 0.1 µF + 10 µF caps. |
| MCSb, MCLK, MO, MI | Main-side SPI signals | MCSb active-low chip select; MCLK input clock; MO = MOSI input; MI = MISO output to controller. |
| VDD2, GND2 | Isolated-side power domain | Supplies peripheral-side SPI interface (SCSb, SCLK, SI, SO); independent from VDD1 for galvanic separation. |
| SCSb, SCLK, SI, SO | Isolated-side SPI signals | SCSb = isolated chip select output; SCLK = isolated clock output; SI = MOSI output to peripheral; SO = MISO input from peripheral. |
| NC (Pin 7, 15) | No-connect terminal | Internally unconnected; must remain floating - not usable as GPIO or bias point. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift issues of optocouplers; enables stable 150 Mbps operation over full temp range. |
| Schmitt-trigger + CMOS inputs | Provides >300 mV hysteresis at 3.3 V, rejecting fast transients common in motor drive and power supply noise environments. |
| Reinforced insulation | 6000 VRMS withstand and IEC 60747-17 certification enable single-package isolation in medical and EV battery management systems. |
| No start-up initialization | Outputs become valid within 0.3 ms of VDD stabilization - critical for fast-reboot industrial PLCs and OBC controllers. |
| Fail-safe default-low | Guarantees peripheral remains disabled during main-side brownout, preventing unintended actuation in safety-critical systems. |
Applications
| Isolated SPI Interface for ADC/DAC | Motor Control Gate Driver Isolation |
|---|---|
Use Scenario: Isolating a precision SAR ADC (e.g., AD7606) from an MCU in a high-voltage data acquisition system. IC Role / Device Role / Timing Role: SI86SS41BE-IS2R transmits sampled data (SO → MI) and forwards SPI commands (MO → SI, MCLK → SCLK, MCSb → SCSb) across isolation barrier with <10 ns skew. Use Value: Enables 16-bit measurement integrity in 1000 V DC bus monitoring by blocking ground loop noise and meeting IEC 61000-4-5 surge immunity. | Use Scenario: Isolating gate driver control signals (PWM, EN, FAULT) between MCU and 3-phase inverter IPMs. IC Role / Device Role / Timing Role: SI86SS41BE-IS2R carries PWM update commands and status reads via SPI, ensuring synchronized switching across all six half-bridges. Use Value: Prevents shoot-through failures by maintaining <15 ns inter-channel skew and surviving 100 kV/µs CMTI in 600 V IGBT modules. |
| Onboard Charger (OBC) Communication | Battery Management System (BMS) Isolation |
Use Scenario: Isolating SPI communication between OBC controller and isolated DC-DC auxiliary power supply ICs. IC Role / Device Role / Timing Role: SI86SS41BE-IS2R relays configuration registers and telemetry (voltage/current/temp) from secondary-side PMICs to primary-side MCU. Use Value: Supports AEC-Q100 Grade 1 qualification and 125 °C ambient operation required for under-hood EV charging units. | Use Scenario: Isolating SPI daisy-chain communication between battery monitor ICs (e.g., BQ79616) and master MCU in multi-cell packs. IC Role / Device Role / Timing Role: SI86SS41BE-IS2R provides galvanic separation between cell-level sensing circuits and high-side MCU, enabling safe hot-swap and fault containment. Use Value: Meets reinforced insulation requirements for 800 V battery systems while maintaining <1 µs round-trip latency for cell balancing coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI86SS51BE-IS2R | Includes RST and ISO_RST pins for isolated reset signaling; same 4-channel SPI function. | Required where coordinated system reset across isolation barrier is needed (e.g., synchronized ADC calibration). | Select SI86SS51BE-IS2R only if isolated reset assertion is mandatory; otherwise SI86SS41BE-IS2R reduces BOM count and layout complexity. |
| ADUM3401CRWZ | 4-channel general-purpose isolator; no native SPI signal mapping; requires external logic for CS/CLK routing. | Suitable for non-SPI protocols or custom serial interfaces; lacks integrated SPI pinout and fail-safe defaults. | Choose ADUM3401CRWZ only when protocol flexibility outweighs SPI optimization; SI86SS41BE-IS2R delivers lower latency and guaranteed timing alignment. |
Compared with SI86SS51BE-IS2R, SI86SS41BE-IS2R removes reset functionality to reduce cost and pin count while retaining identical SPI performance and isolation specs; versus ADUM3401CRWZ, it offers purpose-built SPI routing, deterministic fail-safe behavior, and superior CMTI for power electronics.
Availability
SI86SS41BE-IS2R is available at Aetrix Electronics and suitable for industrial automation, automotive onboard chargers, and isolated ADC/DAC interfaces requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SI86SS41BE-IS2R 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 Si86Sxx family was engineered specifically for high-noise, high-reliability isolation in industrial motor drives, EV powertrain systems, and medical equipment - prioritizing CMTI, timing precision, and safety certification over generic digital isolation.
FAQ
What is the maximum data rate supported by SI86SS41BE-IS2R?
SI86SS41BE-IS2R supports DC to 150 Mbps operation, enabling SPI clock frequencies up to 75 MHz in full-duplex mode. This is validated across –40 to 125 °C and 2.25–5.5 V supply ranges per Skyworks datasheet 206553B, making SI86SS41BE-IS2R suitable for high-speed sensor data acquisition and real-time control loops.
Does SI86SS41BE-IS2R include a reset pin for isolated systems?
No, SI86SS41BE-IS2R does not include RST or ISO_RST pins. That functionality is present only in the Si86SS51 variant. SI86SS41BE-IS2R is optimized as a minimal 4-channel SPI isolator with fixed default-low fail-safe behavior, making it ideal for applications where isolated reset signaling is unnecessary.
What isolation rating does SI86SS41BE-IS2R provide, and which standards does it meet?
SI86SS41BE-IS2R provides 6000 VRMS reinforced isolation per UL 1577 and IEC 60747-17, with certified compliance to CSA 62368-1 and VDE 60747-17. These ratings are achieved in the WB SOIC-16 package and validated for continuous operation in industrial and automotive environments.
Can SI86SS41BE-IS2R operate with different supply voltages on each side?
Yes, SI86SS41BE-IS2R supports independent 2.25–5.5 V supplies on VDD1 (main side) and VDD2 (isolated side), enabling direct interfacing between 3.3 V MCUs and 5 V peripherals without external level shifters. Each side requires its own 0.1 µF + 10 µF bypass capacitors placed near the respective VDD/GND pins.
What is the propagation delay and pulse width distortion of SI86SS41BE-IS2R?
SI86SS41BE-IS2R has a typical propagation delay of 10 ns and pulse width distortion of 3.5 ns, measured at 5 V supply and 25 °C. These values ensure tight timing alignment across all four SPI channels, critical for synchronous sampling and multi-device daisy-chained configurations in SI86SS41BE-IS2R-based systems.
SI86SS41BE-IS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 6000Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 14ns, 14ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86SS41BE-IS2R FAQ
1.How can I place an order for SI86SS41BE-IS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SS41BE-IS2R 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 SI86SS41BE-IS2R reliable?
The price and inventory of SI86SS41BE-IS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SS41BE-IS2R is usually 5 days.
3.What payment methods are accepted for SI86SS41BE-IS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SS41BE-IS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SS41BE-IS2R?
SI86SS41BE-IS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SS41BE-IS2R 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 SI86SS41BE-IS2R?
For technical support, including SI86SS41BE-IS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SS41BE-IS2R requirements.
6.How does Aetrix verify that SI86SS41BE-IS2R is sourced from the original manufacturer or authorized distributors?
All SI86SS41BE-IS2R 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 SI86SS41BE-IS2R meets industry standards.
7.What is the process for return or replacement of SI86SS41BE-IS2R?
All SI86SS41BE-IS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SS41BE-IS2R, 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 SI86SS41BE-IS2R part is unused and in its original packaging.
Return procedure for SI86SS41BE-IS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SS41BE-IS2R Tags
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