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Skyworks Solutions Inc. SI86S641EC-IS1
- Part No.:
- SI86S641EC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S641EC-IS1.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 4 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:4,163
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Product details
Overview
SI86S641EC-IS1 from Skyworks Solutions is a 4-channel, reinforced digital isolator with bidirectional signal isolation across a semiconductor barrier, supporting up to 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating. It operates from 2.25–5.5 V on both sides and is qualified per AEC-Q100 for automotive traction inverters and battery management systems.
For engineers reviewing the SI86S641EC-IS1 datasheet, SI86S641EC-IS1 pinout, SI86S641EC-IS1 application, or SI86S641EC-IS1 equivalent, this page delivers verified technical context, exact pin functions, fail-safe mode behavior, IEC 60747-17 compliance, and validated alternatives for industrial and automotive isolated communication interfaces.
Technical Context
The SI86S641EC-IS1 implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing without clock recovery circuits. Its architecture supports independent undervoltage lockout (UVLO) and reset thresholds on both sides (VDD1/VDD2), with RSTB– at ~1.7 V and UVLO– at ~2.05 V.
This variant features four unidirectional channels (A1–A4 to B1–B4), active-high enable pins (EN1/EN2), Schmitt-trigger + CMOS input thresholds, and selectable fail-safe output state (low-default per "EC" suffix). It includes 36 ns input deglitch filtering and meets reinforced insulation requirements per IEC 60747-17 and UL 1577 (6000 VRMS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, CAN FD, and motor control feedback loops without protocol translation. |
| Propagation delay | 10 ns typical - enables tight timing closure in real-time control loops such as PWM gate driving and ADC sampling synchronization. |
| Isolation rating | 6000 VRMS - certified for reinforced insulation per IEC 60747-17 and UL 1577, suitable for 1000 VAC working voltage systems. |
| Supply range | 2.25–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Fail-safe mode | Default low output (EC suffix) - ensures safe shutdown state during VDD1 loss while VDD2 remains powered. |
| Transient immunity | ≥100 kV/µs CMTI - prevents false triggering in high-dV/dt environments like IGBT switching nodes and power inverter legs. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial motor drive applications. |
Pinout & Package
SI86S641EC-IS1 is housed in a wide-body SOIC-16 package (WB SOIC-16), providing 8.3 mm creepage and clearance for 6000 VRMS isolation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A supply | Power for input-side logic and transmitter; requires 0.1 µF + 10 µF bypass capacitors. |
| GND1 | Side A ground | Reference return for VDD1; must be separated from GND2 by ≥8.3 mm PCB spacing. |
| A1–A4 | Input signals (Side A) | CMOS/Schmitt-trigger inputs; support 36 ns deglitch filtering to reject EFT noise. |
| EN1 | Enable (Side A) | Active-high control for tri-stating all B-side outputs; pulled up internally if unused. |
| Isolation Barrier | Internal die boundary | Monolithic silicon dioxide barrier; no external components required for isolation integrity. |
| B1–B4 | Output signals (Side B) | 50 Ω nominal output impedance; matched trace routing recommended for >50 Mbps operation. |
| EN2 | Enable (Side B) | Active-high control for tri-stating all A-side outputs; independent of EN1 for asymmetric control. |
| VDD2 / GND2 | Side B supply & ground | Galvanically isolated power domain; supports separate 3.3 V or 5 V rails for MCU/peripheral side. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot sequence delays; outputs become valid within 0.3 ms of VDD stabilization. |
| Selectable fail-safe output | "EC" ordering code fixes default B-side output to logic low during VDD1 undervoltage, preventing unintended actuation. |
| 36 ns input deglitch filter | Rejects sub-36 ns transients common in motor drive and SMPS noise environments without affecting signal integrity. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40 to +125 °C ambient, including HTOL, TC, and ESD testing per automotive stress profiles. |
| Reinforced IEC 60747-17 rating | Meets creepage/clearance and partial discharge requirements for safety-critical medical and industrial equipment. |
Applications
| Motor Control Systems | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating gate driver control signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Bidirectional signal isolator for PWM command transmission and fault reporting across high-voltage barriers. Use Value: 10 ns propagation delay enables <100 ns total loop latency; 6000 VRMS rating supports 800 V DC bus systems. |
Use Scenario: Communicating cell voltage and temperature data from high-side monitoring ICs to MCU in EV battery packs. IC Role / Device Role / Timing Role: High-CMTI isolator for SPI-based daisy-chained ADC readouts in noisy high-voltage domains. Use Value: 100 kV/µs transient immunity prevents data corruption during contactor switching events; AEC-Q100 ensures field reliability. |
| Industrial PLC I/O Modules | Isolated Switch-Mode Power Supplies |
|
Use Scenario: Digitally isolating discrete input/output signals between field-side 24 V DC sensors and 3.3 V controller logic. IC Role / Device Role / Timing Role: Multi-channel digital isolator replacing optocouplers in DIN-rail mounted programmable logic controllers. Use Value: 150 Mbps capability supports fast response to emergency stop signals; WB SOIC-16 footprint maintains legacy board layout compatibility. |
Use Scenario: Providing feedback isolation for secondary-side voltage regulation and primary-side gate drive in LLC resonant converters. IC Role / Device Role / Timing Role: Reinforced isolator for analog voltage sensing and digital PWM signal transmission across safety barriers. Use Value: 2.25–5.5 V dual-supply operation allows direct interface with TL431 shunt regulators and UC384x controllers without LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2401ARWZ | 4-channel, 25 Mbps max, 5000 VRMS, SOIC-16, no deglitch filter | Limited to lower-speed industrial comms; lacks AEC-Q100 and 36 ns filtering | Choose when cost sensitivity outweighs speed/CMTI requirements and automotive qualification is unnecessary. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, failsafe configurable via pin | Lower data rate and CMTI (85 kV/µs); no AEC-Q100 or IEC 60747-17 certification | Prefer for non-automotive industrial designs where TI's enhanced manufacturing flow provides sufficient reliability. |
Compared with ADUM2401ARWZ and ISO6741FDWR, SI86S641EC-IS1 delivers 3× higher data rate, 18% higher isolation voltage, 18% greater CMTI, and full automotive qualification-making it the only option suitable for traction inverter gate drive and BMS telemetry in battery electric vehicles.
Availability
SI86S641EC-IS1 is available at Aetrix Electronics and suitable for automotive battery management systems, industrial motor drives, and isolated power supply feedback loops requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SI86S641EC-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 for high-reliability applications.
The Si86S6xx family was designed specifically for demanding automotive and industrial isolation needs-delivering reinforced safety certification, high-speed performance, and robust noise immunity in compact SOIC packages.
FAQ
What is the fail-safe output behavior of SI86S641EC-IS1 during VDD1 undervoltage?
The SI86S641EC-IS1 is ordered with the "EC" suffix, meaning it defaults to logic low on all B-side outputs when VDD1 falls below UVLO– (~2.05 V) while VDD2 remains powered. This behavior is hard-coded in the device and ensures safe shutdown of downstream actuators or drivers during primary-side power loss. The SI86S641EC-IS1 maintains this state until VDD1 recovers above UVLO+ (~2.18 V).
Does SI86S641EC-IS1 require external components for basic operation?
Yes-the SI86S641EC-IS1 requires two bypass capacitors per side: a 0.1 µF ceramic capacitor and a 10 µF bulk capacitor placed between VDD1/GND1 and VDD2/GND2, respectively. These must be located within 5 mm of the pins. No pull-up/down resistors are needed on EN1/EN2, as internal 100 kΩ pull-ups are provided. The SI86S641EC-IS1 does not require clocks, configuration registers, or firmware.
How does the 36 ns input deglitch filter affect signal integrity in SI86S641EC-IS1?
The 36 ns deglitch filter in SI86S641EC-IS1 removes noise pulses shorter than 36 ns-common in motor drive and SMPS environments-without distorting valid logic transitions. Input pulses wider than 36 ns pass through with only 36 ns added delay; narrower pulses are fully suppressed. This preserves signal fidelity in high-noise applications while eliminating false triggers that would otherwise corrupt control signals in the SI86S641EC-IS1.
Can SI86S641EC-IS1 be used in bidirectional data paths like I²C?
No-SI86S641EC-IS1 implements four unidirectional channels (A→B only), with no built-in direction control or open-drain outputs required for true bidirectional protocols like I²C. For I²C isolation, Skyworks recommends the Si860x or Si87xx families. The SI86S641EC-IS1 is optimized for SPI, PWM, GPIO, and digital feedback signals where direction is fixed and timing is critical.
What safety certifications apply to SI86S641EC-IS1?
SI86S641EC-IS1 holds pending UL 1577 recognition (6000 VRMS, 1 minute), CSA certification to 62368-1 and 60601-1 (reinforced), VDE certification to IEC 60747-17 (reinforced), and CQC approval to GB4943.1. All certifications are validated for the WB SOIC-16 package. The SI86S641EC-IS1 is also AEC-Q100 Grade 1 qualified, covering temperature, vibration, and reliability testing for automotive deployment.
SI86S641EC-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:
- General Purpose
- 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
SI86S641EC-IS1 FAQ
1.How can I place an order for SI86S641EC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S641EC-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 SI86S641EC-IS1 reliable?
The price and inventory of SI86S641EC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S641EC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86S641EC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S641EC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S641EC-IS1?
SI86S641EC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S641EC-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 SI86S641EC-IS1?
For technical support, including SI86S641EC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S641EC-IS1 requirements.
6.How does Aetrix verify that SI86S641EC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86S641EC-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 SI86S641EC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86S641EC-IS1?
All SI86S641EC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86S641EC-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 SI86S641EC-IS1 part is unused and in its original packaging.
Return procedure for SI86S641EC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S641EC-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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