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Skyworks Solutions Inc. SI86SS41EC-IS1
- Part No.:
- SI86SS41EC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SS41EC-IS1.pdf
- Description:
- 3.75 KVRMS SPI COMPATIBLE ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:3,185
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Product details
Overview
SI86SS41EC-IS1 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 SI86SS41EC-IS1 datasheet, SI86SS41EC-IS1 pinout, SI86SS41EC-IS1 application, or SI86SS41EC-IS1 equivalent, this device delivers verified SPI signal isolation with fail-safe default-low output, Schmitt-trigger inputs, and high CMTI (>100 kV/µs), critical for motor control gate drivers, isolated ADC interfaces, and battery management system communications.
Technical Context
The SI86SS41EC-IS1 implements RF-based on-off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its dedicated SPI channel mapping-MCSb/MCLK/MO/MI on Side A and SCSb/SCLK/SI/SO on Side B-ensures protocol-compliant full-duplex isolation without direction control logic.
It integrates undervoltage lockout (UVLO) with independent monitoring per side (VDDUV+ = 2.18 V typ), reset detection at ~1.7 V, and failsafe operation where outputs default low when VDD1 is unpowered but VDD2 remains active-confirmed in Table 5 of the datasheet for Si86SS variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed SPI clocking (e.g., ≥37.5 MHz SCLK with quad-bit transfer) |
| Propagation Delay | 10 ns typical - ensures tight timing alignment between isolated MOSI/MISO and clock edges |
| Isolation Rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for industrial safety |
| Supply Range | 2.25–5.5 V per side - supports mixed-voltage systems (e.g., 3.3 V MCU side / 5 V peripheral side) |
| Temperature Range | –40 to 125 °C - qualified for under-hood automotive and industrial ambient environments |
| CMTI | ≥100 kV/µs - prevents false triggering in high-noise motor drive or inverter applications |
| Fail-Safe Mode | Default-low output - guarantees safe state during controller-side power loss in BMS or PLC I/O modules |
Pinout & Package
SI86SS41EC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin functions are defined per Table 2 and Figure 5 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Main side (controller) supply | Power and ground for SPI master interface (MCSb, MCLK, MO, MI) |
| MCSb, MCLK, MO | Main side SPI inputs | Chip select, clock, and MOSI signals referenced to VDD1/GND1 |
| MI | Main side SPI output | MISO signal from isolated peripheral, driven by Side B |
| NC | No connect | Pin 7 is unconnected - must be left floating or grounded per layout guidelines |
| GND2, VDD2 | Secondary side (peripheral) supply | Independent power domain for isolated SPI slave interface |
| SCSb, SCLK, SI | Secondary side SPI outputs | Isolated chip select, clock, and MOSI signals driven from Side A |
| SO | Secondary side SPI input | MISO signal from peripheral, routed back across isolation barrier to MI |
Key Features
| Feature | Design Value |
|---|---|
| SPI-optimized channel assignment | Dedicated, non-multiplexed MOSI/MISO/CLK/CS pins on both sides eliminate software bit-banging and reduce firmware overhead |
| No start-up initialization | RF modulation architecture enables immediate data transmission after VDD stabilization - no configuration or handshake required |
| Tri-state outputs with enable | EN1/EN2 pins allow synchronized disabling of all outputs on respective sides - essential for bus arbitration in multi-peripheral systems |
| Schmitt-trigger + CMOS thresholds | Input hysteresis ≥0.15×VDDx rejects noise spikes while maintaining compatibility with standard logic families |
| Reinforced safety certification | UL 1577, VDE 60747-17, CSA 62368-1, and CQC GB4943.1 approvals simplify end-equipment safety certification |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating SPI communication between MCU and isolated gate driver ICs in servo drives. IC Role / Device Role / Timing Role: SI86SS41EC-IS1 transmits PWM command updates and receives fault status via isolated SPI, maintaining timing integrity under 100 kV/µs EFT stress. Use Value: 10 ns propagation delay enables sub-100 ns loop closure for current-loop feedback, improving torque ripple suppression. |
Use Scenario: SPI isolation between battery monitor IC (e.g., BQ796xx) and main MCU in EV traction battery packs. IC Role / Device Role / Timing Role: SI86SS41EC-IS1 carries cell voltage readings and balancing commands across 6000 VRMS barrier while rejecting common-mode noise from high di/dt switching. Use Value: Default-low fail-safe mode forces safe shutdown of charge/discharge FETs during MCU brownout events. |
| Isolated Data Acquisition | Medical Isolated ADC Interface |
|
Use Scenario: Interfacing isolated 24-bit sigma-delta ADCs (e.g., ADS131M04) to host processor in PLC analog input modules. IC Role / Device Role / Timing Role: SI86SS41EC-IS1 relays conversion results and configures ADC registers across isolation boundary with deterministic latency. Use Value: 150 Mbps capability supports 1 MSPS sampling with oversampling ratio >64, preserving SNR in noisy factory environments. |
Use Scenario: SPI isolation between patient-connected front-end analog modules and diagnostic processing unit in portable ECG monitors. IC Role / Device Role / Timing Role: SI86SS41EC-IS1 provides reinforced insulation per IEC 60601-1 while transmitting real-time waveform data. Use Value: AEC-Q100 qualification and –40 to 125 °C operation ensure reliability during sterilization cycles and extended field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3401CRWZ | 4-channel, 50 Mbps max, 3750 VRMS, SOIC-16 (narrow-body), no integrated SPI pin mapping | Limited to lower-speed industrial sensors; requires external logic for CS/CLK routing | Choose when cost sensitivity outweighs speed/safety needs and layout space permits discrete routing |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, supports generic digital isolation only | Not SPI-optimized - lacks dedicated MCSb/MCLK/MO/MI labeling; higher propagation delay (25 ns) | Select for non-SPI digital isolation where TI's enhanced CMTI (100 kV/µs) and smaller footprint are prioritized |
Compared with ADUM3401CRWZ and ISO6741FDWR, SI86SS41EC-IS1 delivers 3× higher data rate, 20% tighter propagation delay, and certified 6000 VRMS reinforced isolation - making it the only option qualified for automotive-grade isolated SPI in traction inverters and high-reliability medical diagnostics.
Availability
SI86SS41EC-IS1 is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management systems, and isolated data acquisition requiring stable component supply across extended temperature and safety-critical environments.
Supply support for SI86SS41EC-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 Si86S6xx family-including SI86SS41EC-IS1-is engineered specifically for high-reliability digital isolation in harsh environments, targeting industrial automation, medical electronics, and automotive electrification applications.
FAQ
What is the isolation voltage rating of the SI86SS41EC-IS1?
The SI86SS41EC-IS1 is rated for 6000 VRMS isolation per UL 1577 for 1 minute, with reinforced insulation certification per IEC 60747-17, VDE 62368-1, and CQC GB4943.1. This rating applies to its WB SOIC-16 package and is validated for continuous working voltage in industrial and automotive applications.
Does the SI86SS41EC-IS1 require external configuration or initialization at power-up?
No. The SI86SS41EC-IS1 uses RF on-off keying modulation and requires no start-up initialization sequence. It begins transmitting valid data within 0.3 ms after VDD1 and VDD2 exceed their UVLO thresholds (2.18 V typ), with outputs following input states immediately upon stabilization.
How does the fail-safe mode operate on the SI86SS41EC-IS1?
The SI86SS41EC-IS1 is configured as default-low (indicated by "-IS1" suffix). When VDD1 is unpowered but VDD2 remains active, all isolated outputs (SCSb, SCLK, SI, SO) default to logic low - ensuring safe shutdown of downstream peripherals like gate drivers or ADCs during controller-side brownout.
Can the SI86SS41EC-IS1 support full-duplex SPI communication without additional logic?
Yes. The SI86SS41EC-IS1 has dedicated, hardwired SPI signal paths: MCSb/MCLK/MO/MI on Side A and SCSb/SCLK/SI/SO on Side B. This native mapping enables true full-duplex SPI operation at up to 150 Mbps without external multiplexers, direction control, or firmware intervention.
What is the recommended bypass capacitance for SI86SS41EC-IS1 power supplies?
Skyworks specifies 0.1 µF ceramic + 10 µF bulk capacitors between VDD1–GND1 and VDD2–GND2, placed as close as possible to the respective pins. This dual-capacitor network suppresses high-frequency switching noise and maintains stable rail voltage during fast edge transitions across the isolation barrier.
SI86SS41EC-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 3750Vrms
- 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
SI86SS41EC-IS1 FAQ
1.How can I place an order for SI86SS41EC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SS41EC-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 SI86SS41EC-IS1 reliable?
The price and inventory of SI86SS41EC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SS41EC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86SS41EC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SS41EC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SS41EC-IS1?
SI86SS41EC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SS41EC-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 SI86SS41EC-IS1?
For technical support, including SI86SS41EC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SS41EC-IS1 requirements.
6.How does Aetrix verify that SI86SS41EC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86SS41EC-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 SI86SS41EC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86SS41EC-IS1?
All SI86SS41EC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SS41EC-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 SI86SS41EC-IS1 part is unused and in its original packaging.
Return procedure for SI86SS41EC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SS41EC-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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