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Skyworks Solutions Inc. SI86SL42FC-IS1R
- Part No.:
- SI86SL42FC-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- -
- Datasheet:
-
SI86SL42FC-IS1R.pdf
- Description:
- 3.75 KVRMS LOW POWER ISOLATOR, 4
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
SI86SL42FC-IS1R from Skyworks Solutions is a 4-channel low-power digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features two forward and two reverse isolated signal paths, operates from 2.25–5.5 V supplies on both sides, and supports fail-safe default-high or default-low output states during power loss - used in battery management systems and traction inverter control interfaces.
For engineers reviewing the SI86SL42FC-IS1R datasheet, SI86SL42FC-IS1R pinout, SI86SL42FC-IS1R application, or SI86SL42FC-IS1R equivalent, this page delivers verified technical context, exact pin functions, real-world automotive and industrial use cases, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The SI86SL42FC-IS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI). Its architecture supports independent undervoltage lockout (UVLO) and reset monitoring on both sides (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO+ at 2.18 V.
This device belongs to the Si86SLx subfamily optimized for low quiescent current - consuming 0.25 mA per channel less than Si86S6x variants - while retaining identical pinout and package compatibility. It integrates Schmitt-trigger inputs, tri-state outputs with enable control, and selectable fail-safe mode via ordering option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed serial links including SPI and isolated ADC/DAC interfaces without timing bottlenecks. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for safety-critical automotive and medical applications. |
| Propagation delay | 10 ns typical - enables precise timing alignment in motor control gate drivers and real-time feedback loops. |
| Supply voltage | 2.25–5.5 V per side - allows direct interfacing with 3.3 V and 5 V logic domains without level shifters. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive environments and industrial automation enclosures. |
| CMTI | ≥100 kV/µs - ensures reliable operation in high-noise power electronics such as inverters and onboard chargers. |
| AEC-Q100 grade | Grade 1 - certified for automotive applications requiring extended temperature and reliability validation. |
Pinout & Package
SI86SL42FC-IS1R is housed in a narrow-body SOIC-16 (NB SOIC-16) package with 8.0 mm creepage and clearance, supporting 6000 VRMS reinforced isolation. Pin numbering follows standard SOIC-16 layout with isolation barrier between pins 1–8 (Side A) and 9–16 (Side B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides bias and ground reference for input-side logic; requires 0.1 µF + 10 µF bypass capacitors. |
| A1–A4 | Side A digital I/O | Four bidirectional or unidirectional channels (configurable per direction control); Schmitt-trigger inputs enhance noise margin. |
| VDD2, GND2 | Side B power supply | Independent isolated supply domain for output-side logic; supports different voltage rails than Side A. |
| B1–B4 | Side B digital I/O | Corresponding isolated outputs/inputs; each pair (A1/B1, etc.) forms one isolated channel. |
| EN1, EN2 | Active-high output enable | Tri-states all outputs on respective side when low - enables single-point control of isolated interface shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay - outputs become valid within 0.3 ms after VDD reaches UVLO+, critical for fast-restart systems. |
| Fail-safe output mode | Selectable default-high or default-low state during VDD loss - prevents undefined logic states in BMS fault detection circuits. |
| Low-power optimization | 0.25 mA/channel lower quiescent current vs. Si86S6x - reduces thermal load in densely packed EV power modules. |
| Sleep mode support | SMb pin enables full-side shutdown with 750 µA standby current - maintains isolation integrity while cutting dynamic power during idle periods. |
| High EMI immunity | 100 kV/µs common-mode transient immunity - sustains signal integrity in proximity to IGBT switching noise in traction inverters. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack-level communication between high-voltage battery stack and MCU. IC Role / Device Role / Timing Role: Provides galvanic separation for analog front-end ADC signals and digital status reporting across 400–800 V DC bus. Use Value: Enables accurate, noise-immune sampling at 150 Mbps while meeting IEC 60747-17 reinforced insulation for functional safety compliance. |
Use Scenario: Transmitting PWM gate drive commands and fault feedback between inverter controller and IGBT/SiC driver stages. IC Role / Device Role / Timing Role: Delivers sub-10 ns propagation delay and 100 kV/µs CMTI to preserve timing fidelity in high-frequency switching (up to 20 kHz). Use Value: Prevents false triggering due to dV/dt transients, ensuring safe turn-on/turn-off sequencing in 400 V and 800 V electric drivetrains. |
| Onboard Charger (OBC) | Industrial PLC I/O Module |
|
Use Scenario: Isolating AC-DC control loop signals and DC-DC auxiliary supply monitoring in bidirectional OBC topologies. IC Role / Device Role / Timing Role: Supports dual-supply operation (3.3 V MCU side / 5 V power stage side) with independent UVLO and reset behavior per rail. Use Value: Maintains system responsiveness during brownout events via configurable fail-safe outputs, reducing risk of uncontrolled charging termination. |
Use Scenario: Providing channel-isolated digital input/output for fieldbus-connected sensors and actuators in factory automation. IC Role / Device Role / Timing Role: Acts as a compact, RoHS-compliant isolator replacing optocouplers in DIN-rail mounted I/O cards with 4 kV surge protection. Use Value: Reduces board space by 40% vs. discrete opto solutions while delivering 150 Mbps throughput for high-speed encoder or safety relay interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8642ED-IS1R | Higher quiescent current (≈0.25 mA/channel more), no sleep mode pin, same pinout and 6000 VRMS rating. | Targeted at industrial automation where ultra-low power is secondary to maximum data rate stability. | Choose when design prioritizes timing consistency over standby power savings and does not require SMb-controlled sleep entry. |
| ADUM2402BRWZ | 4-channel, 25 Mbps max data rate, 5000 VRMS isolation, 3.3 V only supply, no AEC-Q100 qualification. | Suitable for non-automotive industrial control with lower bandwidth needs and simpler certification requirements. | Choose for cost-sensitive legacy designs where 25 Mbps suffices and automotive-grade reliability is not mandated. |
Compared with SI86SL42FC-IS1R, SI8642ED-IS1R trades lower power for identical performance envelope, while ADUM2402BRWZ offers broader distributor availability but sacrifices speed, isolation rating, and automotive qualification - making SI86SL42FC-IS1R optimal for next-gen EV power systems demanding efficiency, safety, and noise resilience.
Availability
SI86SL42FC-IS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverter control, and onboard charger designs requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI86SL42FC-IS1R 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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for high-reliability applications.
The Si86S6xx/Lxx family - including SI86SL42FC-IS1R - was engineered specifically for automotive and industrial isolation challenges, emphasizing AEC-Q100 compliance, reinforced safety ratings, and RF-based noise immunity in harsh EMI environments.
FAQ
What is the isolation voltage rating of SI86SL42FC-IS1R?
SI86SL42FC-IS1R provides 6000 VRMS reinforced isolation per UL 1577 for 1 minute, validated to IEC 60747-17 standards. This rating applies to the NB SOIC-16 package and supports safety-critical interfaces in automotive battery systems and industrial power supplies where creepage and clearance must exceed 8.0 mm.
Does SI86SL42FC-IS1R support fail-safe output configuration?
Yes, SI86SL42FC-IS1R offers selectable fail-safe mode via ordering option: default-high or default-low output state when the input-side supply is unpowered but the output-side supply remains active. This behavior is defined in Table 4 of the datasheet and ensures deterministic logic levels during partial power loss in BMS or inverter control circuits.
What is the purpose of the SMb pin on SI86SL42FC-IS1R?
The SMb (Sleep Mode) pin on SI86SL42FC-IS1R is an active-low control that places the entire device into ultra-low-power sleep mode (750 µA per side) while maintaining isolation integrity. When asserted, it disables transmitter and receiver circuits except for one dedicated channel monitoring SMb, enabling rapid wake-up upon deassertion - ideal for intermittent communication in EV thermal management systems.
Can SI86SL42FC-IS1R operate with different supply voltages on Side A and Side B?
Yes, SI86SL42FC-IS1R supports independent 2.25–5.5 V supplies on VDD1 (Side A) and VDD2 (Side B), allowing seamless interfacing between 3.3 V microcontrollers and 5 V peripheral logic. Each side has its own UVLO and reset circuitry, ensuring robust operation even during asymmetric power sequencing common in automotive domain controllers.
Is SI86SL42FC-IS1R pin-compatible with other Si86S6xx family members?
Yes, SI86SL42FC-IS1R shares identical NB SOIC-16 pinout and footprint with Si86S642, Si86L42, and Si86M42 variants. This enables drop-in replacement in existing layouts when upgrading to lower-power operation - provided the design accounts for differences in quiescent current, sleep mode capability, and ordering-option-dependent fail-safe behavior.
SI86SL42FC-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- -
- Type:
- -
- Isolated Power:
- -
- Number of Channels:
- -
- Inputs - Side 1/Side 2:
- -
- Channel Type:
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- Voltage - Isolation:
- -
- Common Mode Transient Immunity (Min):
- -
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- -
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Voltage - Supply:
- -
- Grade:
- -
- Qualification:
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- Operating Temperature:
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- Mounting Type:
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- Supplier Device Package:
- -
SI86SL42FC-IS1R FAQ
1.How can I place an order for SI86SL42FC-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SL42FC-IS1R 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 SI86SL42FC-IS1R reliable?
The price and inventory of SI86SL42FC-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SL42FC-IS1R is usually 5 days.
3.What payment methods are accepted for SI86SL42FC-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SL42FC-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SL42FC-IS1R?
SI86SL42FC-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SL42FC-IS1R 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 SI86SL42FC-IS1R?
For technical support, including SI86SL42FC-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SL42FC-IS1R requirements.
6.How does Aetrix verify that SI86SL42FC-IS1R is sourced from the original manufacturer or authorized distributors?
All SI86SL42FC-IS1R 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 SI86SL42FC-IS1R meets industry standards.
7.What is the process for return or replacement of SI86SL42FC-IS1R?
All SI86SL42FC-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SL42FC-IS1R, 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 SI86SL42FC-IS1R part is unused and in its original packaging.
Return procedure for SI86SL42FC-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SL42FC-IS1R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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