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Skyworks Solutions Inc. SI86S642FC-AS1R
- Part No.:
- SI86S642FC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S642FC-AS1R.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 4 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
SI86S642FC-AS1R from Skyworks Solutions is a 4-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It supports up to 150 Mbps data rate, features 10 ns typical propagation delay, 3.5 ns pulse width distortion, 6000 VRMS isolation rating, and operates from 2.25 V to 5.5 V on both sides. It is used in isolated motor control gate drivers and battery management system communication interfaces.
For engineers reviewing the SI86S642FC-AS1R datasheet, SI86S642FC-AS1R pinout, SI86S642FC-AS1R application, or SI86S642FC-AS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, fail-safe default-high output option, Schmitt-trigger + CMOS input thresholds, and 100 kV/µs CMTI performance - all confirmed for this exact SOIC-16 WB variant.
Technical Context
The SI86S642FC-AS1R implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its architecture delivers precise channel-to-channel matching with 3.5 ns pulse width distortion and 10 ns propagation delay at 5 V supply.
It integrates dual-side undervoltage lockout (UVLO) with independent RSTB reset detection (~1.7 V threshold), fail-safe output state selection (default high), and tri-state output enable control per side. The device supports AEC-Q100 qualification and operates across –40 °C to +125 °C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - enables high-speed SPI, CAN FD, and encoder feedback links without protocol translation. |
| Propagation Delay | 10 ns typical - ensures tight timing alignment in closed-loop motor control and real-time power converter feedback paths. |
| Pulse Width Distortion | 3.5 ns typical - preserves duty cycle integrity for PWM signals and clock distribution across isolation boundary. |
| Isolation Rating | 6000 VRMS (1 min) - meets reinforced insulation requirements for industrial inverters and EV traction systems. |
| CMTI | ≥100 kV/µs - rejects fast transient noise in high-dV/dt environments like SiC/GaN gate drive circuits. |
| Supply Voltage Range | 2.25 V to 5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
The SI86S642FC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced insulation. Pin 1 is marked with a dot; pins 1–8 constitute Side A (input side), pins 9–16 constitute Side B (output side), with isolation barrier between pins 8 and 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides isolated 2.25–5.5 V bias for four input-side channels; requires 0.1 µF + 10 µF local bypass. |
| A1–A4 | Side A digital inputs | Four unidirectional input terminals with Schmitt-trigger + CMOS thresholds for noise immunity. |
| EN1 | Side A output enable | Active-high control that places B1–B4 outputs in high-impedance state when low. |
| VDD2, GND2 | Side B power supply | Independent 2.25–5.5 V bias for output-side circuitry; electrically isolated from VDD1/GND1. |
| B1–B4 | Side B digital outputs | Four CMOS outputs with 50 Ω nominal impedance; support fail-safe default-high state during VDD1 loss. |
| EN2 | Side B output enable | Active-high control that places A1–A4 inputs in high-impedance state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced IEC 60747-17 rating | Validated insulation structure supporting 6000 VRMS working voltage - eliminates need for external creepage enhancement in safety-critical designs. |
| Selectable fail-safe mode | Default-high output configuration (confirmed by -AS1R suffix) ensures safe logic state during input-side power loss in BMS monitoring circuits. |
| No start-up initialization | RF modulation architecture enables immediate data transmission upon power stabilization - removes boot-time uncertainty in real-time control loops. |
| Tri-state outputs with enable | Dual EN1/EN2 pins allow independent high-Z control of each side's I/O - essential for bus arbitration and multi-master isolated networks. |
| High electromagnetic immunity | 100 kV/µs common-mode transient immunity - maintains signal integrity in proximity to 100+ A switching nodes in power converters. |
Applications
| Motor Control Gate Driver Isolation | Isolated ADC/DAC Interface |
|---|---|
|
Use Scenario: Isolating PWM signals and fault feedback between MCU and SiC/GaN half-bridge gate drivers in industrial servo drives. IC Role / Device Role / Timing Role: Bidirectional digital isolator providing timing-critical gate enable/disable and DESAT fault reporting across 6000 VRMS barrier. Use Value: 10 ns propagation delay and 3.5 ns pulse width distortion preserve dead-time accuracy and prevent shoot-through in high-frequency switching. |
Use Scenario: Connecting isolated precision ADCs (e.g., ADS131M04) to host MCU in energy metering and grid-tie inverter monitoring. IC Role / Device Role / Timing Role: High-noise-immunity data path for serial conversion results and configuration commands across reinforced insulation barrier. Use Value: Schmitt-trigger inputs reject >36 ns noise pulses; 150 Mbps rate supports oversampled 24-bit ADC streaming without bottleneck. |
| Battery Management System Communication | Onboard Charger Control Interface |
|
Use Scenario: Isolating UART or SPI communication between main controller and cell monitoring ICs (e.g., BQ79616) in EV battery packs. IC Role / Device Role / Timing Role: Fail-safe default-high isolator ensuring open-circuit signaling during cell-side power loss or fuse blow events. Use Value: AEC-Q100 qualification and –40 °C to +125 °C operation guarantee reliability in thermally stressed pack environments. |
Use Scenario: Isolating control signals between AC/DC PFC stage and DC/DC LLC stage in EV onboard chargers. IC Role / Device Role / Timing Role: Reinforced isolator carrying enable, fault, and synchronization signals across 1000+ V potential difference. Use Value: 6000 VRMS rating and UL/VDE/CSA/CQC certifications satisfy system-level safety standards (IEC 62109, UL 62368-1). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 4-channel, 25 Mbps max rate; 37 ns propagation delay; 5000 VRMS isolation; no AEC-Q100 qualification. | Limited to lower-speed industrial PLC I/O modules; not suitable for automotive BMS or OBC where 150 Mbps or AEC-Q100 is required. | Choose ADUM2402BRWZ only if data rate <25 Mbps and automotive qualification is unnecessary. |
| ISO6742FDWR | 4-channel, 50 Mbps max rate; 25 ns propagation delay; 5000 VRMS; 3.3 V only supply; no fail-safe default-high option. | Suitable for cost-sensitive industrial sensors but lacks the high-speed, dual-supply flexibility and fail-safe state needed for motor control feedback. | Prefer ISO6742FDWR only for fixed 3.3 V systems with moderate speed and non-safety-critical default states. |
Compared with ADUM2402BRWZ and ISO6742FDWR, the SI86S642FC-AS1R delivers 6× higher data rate, 3.6× tighter propagation delay, 20% higher isolation voltage, AEC-Q100 compliance, and factory-configured default-high fail-safe - making it uniquely suited for next-generation EV and industrial real-time control.
Availability
SI86S642FC-AS1R is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery management systems, and isolated power supply monitoring requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for SI86S642FC-AS1R 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 was designed specifically for high-reliability, high-speed digital isolation in automotive and industrial systems demanding reinforced safety certification, ultra-low propagation delay, and robust CMTI performance.
FAQ
What is the isolation voltage rating of the SI86S642FC-AS1R?
The SI86S642FC-AS1R is rated for 6000 VRMS isolation for 1 minute per UL 1577, with reinforced insulation certified to IEC 60747-17. This rating applies to the wide-body SOIC-16 package and is validated for continuous working voltage in industrial and automotive applications meeting IEC 62368-1 and IEC 60601-1 requirements.
Does the SI86S642FC-AS1R support fail-safe operation, and how is it configured?
Yes, the SI86S642FC-AS1R is ordered with default-high fail-safe output (indicated by the "-AS1R" suffix). When VDD1 is unpowered but VDD2 remains active, B1–B4 outputs default to logic high. This behavior is factory-configured and does not require external components or configuration registers.
What is the maximum data rate supported by the SI86S642FC-AS1R?
The SI86S642FC-AS1R supports DC to 150 Mbps data rate across all four channels. This capability is verified under load conditions with CL = 15 pF and is maintained across the full operating temperature range (–40 °C to +125 °C) and supply voltage range (2.25 V to 5.5 V).
Is the SI86S642FC-AS1R qualified for automotive applications?
Yes, the SI86S642FC-AS1R is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C) and supports AIAG-compliant PPAP documentation. It is manufactured using automotive-specific process flows and is approved for use in onboard chargers, battery management systems, and traction inverter control units.
What are the supply voltage requirements for SI86S642FC-AS1R operation?
The SI86S642FC-AS1R requires independent 2.25 V to 5.5 V supplies on both sides (VDD1/GND1 and VDD2/GND2). Each side must be decoupled with 0.1 µF ceramic + 10 µF bulk capacitors placed adjacent to the respective VDD/GND pins. Operation outside this range may trigger UVLO or cause undefined output states.
SI86S642FC-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86S642FC-AS1R FAQ
1.How can I place an order for SI86S642FC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S642FC-AS1R 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 SI86S642FC-AS1R reliable?
The price and inventory of SI86S642FC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S642FC-AS1R is usually 5 days.
3.What payment methods are accepted for SI86S642FC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S642FC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S642FC-AS1R?
SI86S642FC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S642FC-AS1R 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 SI86S642FC-AS1R?
For technical support, including SI86S642FC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S642FC-AS1R requirements.
6.How does Aetrix verify that SI86S642FC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI86S642FC-AS1R 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 SI86S642FC-AS1R meets industry standards.
7.What is the process for return or replacement of SI86S642FC-AS1R?
All SI86S642FC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S642FC-AS1R, 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 SI86S642FC-AS1R part is unused and in its original packaging.
Return procedure for SI86S642FC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S642FC-AS1R Tags
-
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
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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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