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Skyworks Solutions Inc. SI86SS41EE-IS2R
- Part No.:
- SI86SS41EE-IS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SS41EE-IS2R.pdf
- Description:
- 6.0 KVRMS SPI COMPATIBLE ISOLATO
- Quantity:
- Payment:
- Shipping:
Inventory:1,467
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Product details
Overview
SI86SS41EE-IS2R from Skyworks Solutions is a 4-channel SPI digital isolator with reinforced isolation, designed for bidirectional isolated communication between microcontroller and peripheral in high-noise industrial or 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 SI86SS41EE-IS2R datasheet, SI86SS41EE-IS2R pinout, SI86SS41EE-IS2R application, or SI86SS41EE-IS2R equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in isolated ADC/DAC and motor control, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The SI86SS41EE-IS2R implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI). Its dedicated SPI interface includes non-isolated main side (MCSb, MCLK, MO, MI) and isolated secondary side (SCSb, SCLK, SI, SO) signal paths, with no direction control or reset pins.
It uses CMOS threshold inputs with Schmitt trigger hysteresis for enhanced noise rejection, supports fail-safe default-low output during unpowered conditions, and requires only 0.1 µF + 10 µF bypass capacitors per supply rail - no external resistors or timing components needed for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed isolated SPI communication without protocol overhead or clock stretching. |
| Propagation Delay | 10 ns typical - ensures tight timing alignment between controller and isolated peripheral in real-time systems. |
| Isolation Rating | 6000 VRMS - meets reinforced insulation requirements for industrial safety standards (IEC 60747-17, UL 1577). |
| Supply Voltage | 2.25–5.5 V per side - supports interoperability 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 environments without derating. |
| Pulse Width Distortion | 3.5 ns typical - preserves SPI clock duty cycle integrity for reliable sampling at high frequencies. |
| Transient Immunity | ≥100 kV/µs - suppresses fast common-mode transients in motor drives and switch-mode power supplies. |
Pinout & Package
SI86SS41EE-IS2R is housed in a WB SOIC-16 package (wide-body, 10.3 mm body width, 1.27 mm pitch), providing 8.3 mm creepage and clearance for 6000 VRMS isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Main side (Side A) supply | Power input for controller-side logic; must be decoupled with 0.1 µF + 10 µF capacitors. |
| GND1 | Main side ground | Reference return path for Side A signals; separate from GND2 to maintain isolation integrity. |
| MCSb | Main side chip select | Active-low enable for SPI transaction initiation on controller side; synchronous with MCLK. |
| MCLK | Main side clock input | Drives isolated SCLK output; determines maximum SPI bit rate across isolation barrier. |
| MO | Main side MOSI input | Transmits controller data to peripheral; isolated via RF modulation to SI output. |
| MI | Main side MISO output | Receives peripheral response from SO input; completes full-duplex SPI loopback path. |
| NC | No connect | Pin 7 is internally unused; must remain unconnected per datasheet Figure 5 for SI86SS41. |
| GND2 | Secondary side ground | Return path for isolated peripheral-side signals; galvanically separated from GND1. |
| SCSb | Secondary side chip select | Isolated copy of MCSb; enables peripheral device only when controller asserts chip select. |
| SI | Secondary side MOSI output | Isolated data output driven by MO; interfaces directly with peripheral's MOSI pin. |
| SCLK | Secondary side clock output | Isolated copy of MCLK; provides synchronized clock to peripheral for data sampling. |
| SO | Secondary side MISO input | Receives peripheral response; feeds back through isolation to MI pin on controller side. |
| VDD2 | Secondary side supply | Power for isolated peripheral-side circuitry; independent voltage domain from VDD1. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates startup initialization delay and optical aging concerns; enables immediate operation after power-up. |
| Schmitt trigger + CMOS threshold inputs | Provides ≥0.15 × VDD input hysteresis for reliable noise rejection in EMI-heavy motor drive or power supply environments. |
| Fail-safe default-low output | Ensures peripheral remains disabled during VDD2 power-up or brownout, preventing spurious command execution. |
| Tri-state capable outputs | Allows multiple peripherals to share an isolated bus without contention when chip select is deasserted. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including onboard chargers and battery management systems. |
Applications
| Isolated SPI Interface for Industrial ADC/DAC | Motor Control Gate Driver Isolation |
|---|---|
|
Use Scenario: Isolating high-resolution SAR ADC (e.g., AD7606) or precision DAC (e.g., DAC8568) from host MCU in PLC analog I/O modules. IC Role / Device Role / Timing Role: SI86SS41EE-IS2R bridges SPI commands and data across isolation barrier while preserving timing integrity for 1 MSPS sampling rates. Use Value: Enables 6000 VRMS reinforced insulation without adding jitter or latency that would degrade effective number of bits (ENOB). |
Use Scenario: Providing isolated SPI configuration and status feedback between MCU and isolated gate driver IC (e.g., Si823Hx) in servo inverters. IC Role / Device Role / Timing Role: SI86SS41EE-IS2R carries PWM setup registers and fault reporting across isolation boundary with <10 ns skew. Use Value: Maintains functional safety compliance (IEC 61800-5-2) while supporting real-time diagnostics and dynamic parameter updates. |
| Onboard Charger (OBC) Communication | Battery Management System (BMS) Stack Monitoring |
|
Use Scenario: Isolating MCU SPI interface from isolated DC-DC controller (e.g., UCC28911) and auxiliary power monitoring ICs in EV OBC units. IC Role / Device Role / Timing Role: SI86SS41EE-IS2R transmits telemetry and control commands across primary-secondary boundary in multi-kW AC/DC converters. Use Value: Supports 150 Mbps burst transfers for fast calibration updates while meeting reinforced insulation requirements per UL 62368-1. |
Use Scenario: Isolating master MCU from daisy-chained cell monitor ICs (e.g., BQ79616) in high-voltage EV battery packs. IC Role / Device Role / Timing Role: SI86SS41EE-IS2R relays voltage/temperature readings and balancing commands across 400–800 V stack boundaries. Use Value: Delivers deterministic latency (<15 ns total round-trip) required for active cell balancing synchronization across 12+ series cells. |
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 data rate; 30 ns propagation delay; 2500 VRMS isolation; SOIC-16 NB package. | Limited to lower-speed SPI (≤25 MHz SCLK); insufficient for 150 Mbps QSPI or high-frequency ADC streaming. | Select when cost sensitivity outweighs speed/isolation needs and ambient temperature stays ≤105 °C. |
| SI86SS51EE-IS2R | Same pinout and package; adds ISO_RST and RST pins for isolated reset signaling; identical electrical specs otherwise. | Required where peripheral-side reset coordination is mandatory (e.g., isolated FPGA configuration or watchdog recovery). | Choose SI86SS51EE-IS2R if system-level reset sequencing across isolation barrier is needed; otherwise SI86SS41EE-IS2R suffices. |
Compared with ADUM3401CRWZ, SI86SS41EE-IS2R delivers 3× higher data rate and 6000 VRMS isolation in same footprint, enabling next-gen OBC and BMS designs; versus SI86SS51EE-IS2R, it omits reset functionality to reduce cost and complexity where reset isolation is unnecessary.
Availability
SI86SS41EE-IS2R is available at Aetrix Electronics and suitable for industrial automation systems, onboard chargers, and battery management systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI86SS41EE-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 for high-reliability markets.
The Si86Sxx family was engineered specifically for high-speed, low-power, reinforced-isolation applications in industrial automation, medical electronics, and electric vehicle power systems - prioritizing noise immunity, timing precision, and safety certification.
FAQ
What is the maximum SPI clock frequency supported by SI86SS41EE-IS2R?
SI86SS41EE-IS2R supports up to 150 Mbps data rate, corresponding to a maximum SCLK frequency of 75 MHz in standard SPI mode (2 bits per clock cycle). This enables full utilization of high-speed ADCs and DACs without protocol bottlenecks. The 10 ns typical propagation delay ensures minimal skew between SCLK and data edges, preserving setup/hold timing margins at 75 MHz.
Does SI86SS41EE-IS2R require external pull-up or pull-down resistors on its pins?
No, SI86SS41EE-IS2R does not require external pull-up or pull-down resistors on any pin. Its inputs feature Schmitt trigger hysteresis and CMOS thresholds, and outputs include internal weak pulldowns (100 kΩ) during undervoltage lockout. External resistors are only recommended in excessively noisy systems per AN1359, not for baseline operation.
How does SI86SS41EE-IS2R handle power loss on the secondary side (VDD2)?
When VDD2 drops below 2.25 V (unpowered state), SI86SS41EE-IS2R enters fail-safe mode and holds all secondary-side outputs (SCSb, SCLK, SI, SO) low - the default-low ordering option confirmed by the "EE" suffix. This prevents unintended peripheral activation during brownout or startup, ensuring safe system behavior in critical applications like motor control.
Can SI86SS41EE-IS2R be used in place of SI86SS51EE-IS2R?
SI86SS41EE-IS2R and SI86SS51EE-IS2R share identical pinout, package, and core SPI functionality, but SI86SS51EE-IS2R adds RST and ISO_RST pins for isolated reset signaling. SI86SS41EE-IS2R can replace SI86SS51EE-IS2R only if reset coordination across isolation is not required; otherwise, the missing reset capability may compromise system reliability.
What safety certifications apply to SI86SS41EE-IS2R?
SI86SS41EE-IS2R carries pending UL 1577 (6000 VRMS), CSA 62368-1/60601-1, VDE 60747-17, and CQC GB4943.1 certifications for reinforced insulation. Its WB SOIC-16 package achieves 8.3 mm creepage/clearance, satisfying end-equipment requirements for industrial and automotive safety standards without additional board-level barriers.
SI86SS41EE-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
SI86SS41EE-IS2R FAQ
1.How can I place an order for SI86SS41EE-IS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SS41EE-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 SI86SS41EE-IS2R reliable?
The price and inventory of SI86SS41EE-IS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SS41EE-IS2R is usually 5 days.
3.What payment methods are accepted for SI86SS41EE-IS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SS41EE-IS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SS41EE-IS2R?
SI86SS41EE-IS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SS41EE-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 SI86SS41EE-IS2R?
For technical support, including SI86SS41EE-IS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SS41EE-IS2R requirements.
6.How does Aetrix verify that SI86SS41EE-IS2R is sourced from the original manufacturer or authorized distributors?
All SI86SS41EE-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 SI86SS41EE-IS2R meets industry standards.
7.What is the process for return or replacement of SI86SS41EE-IS2R?
All SI86SS41EE-IS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SS41EE-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 SI86SS41EE-IS2R part is unused and in its original packaging.
Return procedure for SI86SS41EE-IS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SS41EE-IS2R Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO6741FQDWRQ1
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ISO7741FDWR
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