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Skyworks Solutions Inc. SI86SS41BC-IS1
- Part No.:
- SI86SS41BC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SS41BC-IS1.pdf
- Description:
- 3.75 KVRMS SPI COMPATIBLE ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
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Product details
Overview
SI86SS41BC-IS1 from Skyworks Solutions is a 4-channel, SPI-compatible digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and dual 2.25–5.5 V supply operation. It provides isolated SPI communication between controller (Side A) and peripheral (Side B) in industrial motor drives and battery management systems.
For engineers reviewing the SI86SS41BC-IS1 datasheet, SI86SS41BC-IS1 pinout, SI86SS41BC-IS1 application, or SI86SS41BC-IS1 equivalent, this device delivers deterministic SPI signal isolation with fail-safe default-low output, 10 ns propagation delay, and AEC-Q100-qualified reliability for high-noise automotive and industrial environments.
Technical Context
The SI86SS41BC-IS1 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling immediate data transmission upon power-up. Its architecture supports independent 2.25–5.5 V supplies on both sides, with undervoltage lockout (UVLO) thresholds at 2.10–2.25 V and reset behavior triggered below 1.7 V.
It features dedicated SPI interface pins - MCSb/MCLK/MO/MI on Side A and SCSb/SCLK/SI/SO on Side B - with no internal direction control logic. The NC pin (Pin 6) confirms its non-reset variant identity versus the SI86SS51, and it lacks sleep mode (SMb) or isolated reset (ISO_RST) functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI clocking up to 75 MHz with full-duplex timing margin. |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577, IEC 60747-17, and CSA 62368-1. |
| Propagation delay | 10 ns typical - enables tight timing budgets in closed-loop motor control and real-time ADC/DAC isolation. |
| Supply voltage | 2.25–5.5 V per side - allows direct interfacing with 3.3 V and 5 V microcontrollers and peripherals without level shifters. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
| Pulse width distortion | 3.5 ns typical - preserves SPI clock duty cycle integrity for reliable sampling at high frequencies. |
| Transient immunity | ≥100 kV/µs - ensures robust operation in high-di/dt environments like inverters and SMPS. |
Pinout & Package
SI86SS41BC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage), supporting 6000 VRMS isolation. Pin assignments are validated per Figure 5 and Table 2 of Skyworks datasheet 206553B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, VDD1 | Main side (Side A) supply | Power input for controller-side logic and transmitter circuits; requires 0.1 µF + 10 µF bypass. |
| 2, GND1 | Main side ground | Reference return for Side A; must be separated from GND2 by ≥8 mm PCB clearance per safety standards. |
| 3, MCSb | Main side chip select | Active-low enable for SPI transaction initiation on Side A; synchronous with MCLK edge. |
| 4, MCLK | Main side clock input | Drives isolated SCLK output; determines maximum SPI throughput and timing margins. |
| 5, MO | Main side MOSI input | Transmits controller data to isolated peripheral; passes through RF modulation to SI output. |
| 6, NC | No connect | Physically present but unconnected die bond pad; must remain floating per design specification. |
| 7, MI | Main side MISO output | Receives isolated SO input via demodulation; provides controller with peripheral response data. |
| 8, GND2 | Secondary side ground | Return path for isolated peripheral-side logic; galvanically separated from GND1 by isolation barrier. |
| 9, SCSb | Secondary side chip select | Isolated active-low output mirroring MCSb; enables peripheral SPI interface synchronously. |
| 10, SI | Secondary side MOSI output | Isolated version of MO; drives peripheral data input with 10 ns delay and 50 Ω output impedance. |
| 11, SCLK | Secondary side clock output | Isolated copy of MCLK; maintains phase alignment for accurate peripheral sampling. |
| 12, SO | Secondary side MISO input | Receives peripheral response; demodulated and routed to MI pin with fail-safe low default. |
| 13, VDD2 | Secondary side supply | Power for isolated receiver and output drivers; independent of VDD1 for system-level fault containment. |
| 14–16, GND1/GND2/VDD1 | Ground/supply repeats | Redundant pins improve thermal dissipation and reduce ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; achieves 0.3 ms power-on stabilization without firmware handshake. |
| Schmitt trigger + CMOS threshold inputs | Provides >0.15 × VDD input hysteresis, rejecting noise spikes <36 ns and ensuring clean edge detection in noisy EMI environments. |
| Fail-safe default-low output | Guarantees known state during VDD2 brownout or Side A power loss, preventing undefined peripheral behavior in safety-critical systems. |
| Tri-state outputs with enable | Allows bus sharing on isolated SPI lines; outputs enter high-impedance when EN1/EN2 inactive (not used in SI86SS41BC-IS1). |
| Reinforced insulation certification | UL 1577, VDE 60747-17, CSA 62368-1, and CQC GB4943.1 approvals confirm suitability for medical and industrial safety boundaries. |
Applications
| Industrial Motor Control | Battery Management Systems |
|---|---|
|
Use Scenario: Isolating SPI signals between MCU and isolated gate drivers or current-sense ADCs in 3-phase inverter stacks. IC Role / Device Role / Timing Role: SPI signal translator across 6000 VRMS barrier with 10 ns propagation delay and 3.5 ns pulse width distortion. Use Value: Enables precise PWM timing synchronization while blocking ground loop currents and common-mode transients up to 100 kV/µs. |
Use Scenario: Communicating with isolated cell monitor ICs (e.g., BQ769x0) in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Bidirectional SPI isolator with fail-safe low default during partial power loss in pack monitoring subsystems. Use Value: Maintains safe shutdown state when MCU side loses power, preventing erroneous cell balancing commands. |
| Medical Isolated ADC/DAC Interfaces | Onboard Charger Control |
|
Use Scenario: Isolating SPI links between microcontroller and isolated sigma-delta ADCs in patient-connected diagnostic equipment. IC Role / Device Role / Timing Role: Reinforced insulation barrier meeting IEC 60601-1 creepage/clearance and transient immunity requirements. Use Value: Supports 6000 VRMS withstand for 1 minute and 100 kV/µs CMTI, satisfying medical safety isolation mandates. |
Use Scenario: Isolating MCU SPI commands to isolated DC-DC controllers and digital power meters in EV onboard chargers. IC Role / Device Role / Timing Role: High-speed SPI isolator with AEC-Q100 qualification and –40 to +125 °C operation. Use Value: Ensures reliable communication in thermally demanding under-hood environments with no derating required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI86SS51BC-IS1 | Includes RST and ISO_RST pins for isolated reset signaling; same pinout except Pin 6 = RST (not NC) and Pin 11 = ISO_RST (not SCLK). | Required where synchronized reset coordination across isolation barrier is needed (e.g., fault recovery in traction inverters). | Select SI86SS51BC-IS1 only if isolated reset functionality is mandatory; SI86SS41BC-IS1 reduces BOM count where reset is handled locally. |
| ADUM3401CRWZ | 4-channel, 50 Mbps SPI isolator; 25 ns propagation delay; 2.7–5.5 V supply; UL 1577 2500 VRMS rating (not reinforced). | Suitable for cost-sensitive industrial controls where 6000 VRMS and 150 Mbps are not required. | Choose ADUM3401CRWZ for lower-cost, lower-performance applications; SI86SS41BC-IS1 provides higher speed, tighter timing, and reinforced safety certification. |
Compared with SI86SS51BC-IS1, SI86SS41BC-IS1 removes isolated reset capability to simplify design and reduce pin count, while retaining identical SPI timing and isolation specs. Against ADUM3401CRWZ, it delivers 3× higher data rate, 2.5× lower propagation delay, and certified reinforced insulation for safety-critical deployments.
Availability
SI86SS41BC-IS1 is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and medical isolated ADC/DAC interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SI86SS41BC-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 Si86Sxx family was designed specifically for high-reliability, high-speed digital isolation in automotive, industrial, and medical systems requiring reinforced safety certification and sub-10 ns timing precision.
FAQ
What is the isolation voltage rating of SI86SS41BC-IS1?
SI86SS41BC-IS1 provides 6000 VRMS reinforced isolation per UL 1577 for 1 minute, validated per IEC 60747-17 and CSA 62368-1. This rating applies to the WB SOIC-16 package and supports designs requiring high working voltage barriers in industrial and automotive applications. The isolation barrier withstands transient overvoltages up to 100 kV/µs, making SI86SS41BC-IS1 suitable for high-di/dt environments such as motor drives and SMPS.
Does SI86SS41BC-IS1 support SPI full-duplex operation?
Yes, SI86SS41BC-IS1 supports true full-duplex SPI operation: MO and MI on Side A operate concurrently with SI and SO on Side B, enabling simultaneous controller-to-peripheral and peripheral-to-controller data transfer. Its 10 ns typical propagation delay and 3.5 ns pulse width distortion preserve timing integrity at SPI clock rates up to 75 MHz, and the dedicated SCLK and SCSb outputs ensure synchronous peripheral enablement without software overhead.
What is the function of Pin 6 (NC) on SI86SS41BC-IS1?
Pin 6 on SI86SS41BC-IS1 is designated NC (No Connect) and must remain unconnected per Skyworks datasheet 206553B. It is a physically present but internally unconnected bond pad-distinct from the RST pin found on SI86SS51BC-IS1 (which uses Pin 6 for reset input). Routing or terminating Pin 6 violates the device's validated layout and may compromise isolation integrity or EMC performance.
How does the fail-safe mode work on SI86SS41BC-IS1?
SI86SS41BC-IS1 is configured for default-low fail-safe operation: when VDD1 or VDD2 drops below UVLO threshold (2.10–2.25 V), all outputs (SI, SO, SCSb, SCLK) transition to logic low within 0.3 ms. This behavior prevents undefined states in peripherals during brownout events. The default-low option is fixed for this part number and cannot be changed via external configuration-it is implemented at silicon level per ordering code suffix "-IS1".
Is SI86SS41BC-IS1 qualified for automotive applications?
Yes, SI86SS41BC-IS1 is AEC-Q100 qualified for Grade 1 (–40 to +125 °C) operation and built using automotive-specific manufacturing flows. It supports AIAG-compliant PPAP documentation and IMDS/CAMDS reporting. Its 6000 VRMS reinforced isolation, 100 kV/µs CMTI, and fail-safe default-low output meet functional safety requirements for onboard chargers, battery management systems, and traction inverter control in BEV/HEV platforms.
SI86SS41BC-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
SI86SS41BC-IS1 FAQ
1.How can I place an order for SI86SS41BC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SS41BC-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 SI86SS41BC-IS1 reliable?
The price and inventory of SI86SS41BC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SS41BC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86SS41BC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SS41BC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SS41BC-IS1?
SI86SS41BC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SS41BC-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 SI86SS41BC-IS1?
For technical support, including SI86SS41BC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SS41BC-IS1 requirements.
6.How does Aetrix verify that SI86SS41BC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86SS41BC-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 SI86SS41BC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86SS41BC-IS1?
All SI86SS41BC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SS41BC-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 SI86SS41BC-IS1 part is unused and in its original packaging.
Return procedure for SI86SS41BC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SS41BC-IS1 Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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