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Skyworks Solutions Inc. SI86SS41BE-AS2R
- Part No.:
- SI86SS41BE-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SS41BE-AS2R.pdf
- Description:
- 6.0 KVRMS SPI COMPATIBLE ISOLATO
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
SI86SS41BE-AS2R 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-AS2R datasheet, SI86SS41BE-AS2R pinout, SI86SS41BE-AS2R application, or SI86SS41BE-AS2R equivalent, this device delivers verified SPI signal isolation with fail-safe default-low output, Schmitt-trigger inputs, and AEC-Q100 qualification for battery management and onboard charger designs.
Technical Context
The SI86SS41BE-AS2R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity. Its dedicated SPI interface includes main-side pins (MCSb, MCLK, MO, MI) and isolated secondary-side pins (SCSb, SCLK, SI, SO), with no direction control or reset functionality-distinguishing it from Si86SS51 and Si86SQ44 variants.
It uses separate VDD1/GND1 and VDD2/GND2 supplies for galvanic isolation, incorporates undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V), and holds outputs low during power-up via 100 kΩ pulldown until stabilization. The device lacks sleep mode (SMb) and reset (RST/ISO_RST) pins, confirming its fixed SPI-only configuration per Figure 5 and Table 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI clocking without protocol overhead |
| Propagation delay | 10 ns typical - enables tight timing margins in real-time control loops |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per IEC 60747-17 for 600 VAC systems |
| Supply voltage | 2.25–5.5 V per side - interoperable with 3.3 V and 5 V logic domains |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Fail-safe mode | Default low output - ensures safe state during VDD2 power loss in motor gate drivers |
| Transient immunity | ≥100 kV/µs - suppresses fast common-mode transients in noisy power electronics |
Pinout & Package
SI86SS41BE-AS2R is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin assignments are validated per Figure 5 and Table 2 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Main-side power domain | Supplies controller-side SPI interface; requires 0.1 µF + 10 µF bypass capacitors |
| MCSb, MCLK, MO, MI | Main-side SPI signals | Chip select, clock, MOSI, and MISO for non-isolated MCU/controller side |
| VDD2, GND2 | Secondary-side power domain | Supplies peripheral-side SPI interface; electrically isolated from VDD1/GND1 |
| SCSb, SCLK, SI, SO | Isolated SPI signals | Galvanically isolated chip select, clock, MOSI, and MISO for peripheral side |
| NC (Pin 7) | No-connect | Internally unconnected; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; achieves 100 kV/µs CMTI without external filtering |
| Schmitt-trigger + CMOS threshold inputs | Rejects >36 ns noise pulses and ensures clean edge detection in EMI-heavy motor drive environments |
| Fail-safe default-low output | Prevents unintended peripheral activation during brown-out or power sequencing faults |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including onboard chargers and battery management systems |
| Reinforced insulation certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1 - reduces system-level safety certification effort |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
Use Scenario: Isolating SPI communication between MCU and isolated gate drivers in servo inverters. IC Role / Device Role / Timing Role: SPI signal isolator providing galvanic separation between 3.3 V control logic and 600 V power stage. Use Value: Enables precise PWM timing with 10 ns propagation delay while blocking ground-loop noise and HV transients. | Use Scenario: Isolating cell monitor ICs (e.g., BQ796xx) from host MCU in EV battery packs. IC Role / Device Role / Timing Role: Bidirectional SPI isolator maintaining integrity of voltage/temperature readback at 1–10 MHz rates. Use Value: Supports AEC-Q100-compliant data acquisition with 6000 VRMS isolation for functional safety compliance. |
| Isolated Switch-Mode Power Supply | Medical Isolated Data Acquisition |
Use Scenario: Isolating digital feedback loop signals (e.g., ADC outputs) from primary-side controller in LLC resonant converters. IC Role / Device Role / Timing Role: High-speed SPI isolator transferring digitized current/voltage samples across isolation barrier. Use Value: Maintains closed-loop bandwidth with sub-15 ns total jitter, critical for adaptive regulation stability. | Use Scenario: Isolating SPI-configured ADCs (e.g., AD7768) from patient-connected front-end circuits in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Reinforced-isolation SPI bridge meeting IEC 60601-1 creepage/clearance requirements. Use Value: Achieves 6000 VRMS withstand and 100 kV/µs CMTI to prevent leakage currents and ensure patient safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI86SS41BD-AS2R | Same pinout and SPI function but default-high fail-safe output instead of default-low | Preferred where peripheral enable is active-high and safe state requires logic high during power loss | Select based on required default output polarity; both share identical timing, isolation, and AEC-Q100 qualification |
| ADUM3401BRWZ | 4-channel SPI isolator with 50 Mbps max rate, 25 ns propagation delay, and 2500 VRMS isolation | Suitable for cost-sensitive industrial applications where 6000 VRMS and 150 Mbps are not required | Choose ADUM3401BRWZ only if lower isolation rating and reduced speed meet system safety and timing budgets |
Compared with SI86SS41BE-AS2R, SI86SS41BD-AS2R offers identical performance except for fail-safe polarity, while ADUM3401BRWZ trades isolation strength and speed for broader legacy compatibility and lower unit cost in non-automotive designs.
Availability
SI86SS41BE-AS2R is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and isolated switch-mode power supply designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI86SS41BE-AS2R 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-including SI86SS41BE-AS2R-is engineered for high-reliability isolated digital communication in harsh environments, targeting automotive electrification, industrial automation, and medical systems demanding reinforced insulation and AEC-Q100 compliance.
FAQ
What is the isolation voltage rating of the SI86SS41BE-AS2R?
The SI86SS41BE-AS2R provides 6000 VRMS reinforced isolation per UL 1577 for 1 minute, validated to IEC 60747-17 and CSA 62368-1 standards. This rating applies specifically to the WB SOIC-16 package and enables use in 600 VAC industrial and automotive systems where creepage and clearance must exceed 8.3 mm.
Does the SI86SS41BE-AS2R support SPI bidirectional data transfer?
Yes, the SI86SS41BE-AS2R supports full-duplex SPI communication via dedicated unidirectional channels: MO/MI handle main-side MOSI/MISO, while SI/SO handle isolated-side MOSI/MISO. Unlike Si86SQ44, it does not include direction control-its channel mapping is fixed for standard SPI topology.
What is the purpose of the NC pin on the SI86SS41BE-AS2R?
Pin 7 of the SI86SS41BE-AS2R is designated NC (No Connect) per Table 2 and Figure 5. It is internally unconnected and must remain unpopulated or tied to GND in PCB layout to avoid parasitic coupling; no external circuitry should reference this pin.
How does the fail-safe mode operate in the SI86SS41BE-AS2R?
The SI86SS41BE-AS2R implements a default-low fail-safe mode: when VDD2 is powered but VDD1 is unpowered or below UVLO threshold, all isolated outputs (SCSb, SCLK, SI, SO) are driven low. This behavior is fixed by ordering code 'E' and prevents unintended peripheral activation during controller-side power loss.
Is the SI86SS41BE-AS2R compatible with 3.3 V and 5 V logic levels?
Yes, the SI86SS41BE-AS2R supports 2.25–5.5 V on both VDD1 and VDD2 rails independently. It accepts CMOS/Schmitt-trigger inputs across this range and drives outputs to VOH ≥ VDDx–0.4 V and VOL ≤ 0.4 V, ensuring interoperability with 3.3 V MCUs and 5 V peripherals without level shifters.
SI86SS41BE-AS2R 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:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 6000Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86SS41BE-AS2R FAQ
1.How can I place an order for SI86SS41BE-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SS41BE-AS2R 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-AS2R reliable?
The price and inventory of SI86SS41BE-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SS41BE-AS2R is usually 5 days.
3.What payment methods are accepted for SI86SS41BE-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SS41BE-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SS41BE-AS2R?
SI86SS41BE-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SS41BE-AS2R 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-AS2R?
For technical support, including SI86SS41BE-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SS41BE-AS2R requirements.
6.How does Aetrix verify that SI86SS41BE-AS2R is sourced from the original manufacturer or authorized distributors?
All SI86SS41BE-AS2R 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-AS2R meets industry standards.
7.What is the process for return or replacement of SI86SS41BE-AS2R?
All SI86SS41BE-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SS41BE-AS2R, 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-AS2R part is unused and in its original packaging.
Return procedure for SI86SS41BE-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SS41BE-AS2R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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