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Skyworks Solutions Inc. SI86S661BB-AUR
- Part No.:
- SI86S661BB-AUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S661BB-AUR.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 6 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:4,499
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Product details
Overview
SI86S661BB-AUR from Skyworks Solutions is a 6-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and dual 2.25–5.5 V supply operation. It features Schmitt-trigger + CMOS inputs, tri-state outputs with enable, selectable fail-safe default-high/low output, and operates across –40 to 125 °C for automotive and industrial isolated interfaces.
For engineers reviewing the SI86S661BB-AUR datasheet, SI86S661BB-AUR pinout, SI86S661BB-AUR application, or SI86S661BB-AUR equivalent, key selection criteria include reinforced IEC 60747-17 certification, 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, and AEC-Q100 qualification for traction inverter and battery management systems.
Technical Context
The SI86S661BB-AUR implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and delivering superior noise immunity versus pulse-based schemes. Its architecture supports independent UVLO and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and 100 kΩ weak pulldown during unpowered states.
It provides six bidirectional isolated channels with side-specific enable pins (EN1/EN2), no internal direction control, and supports fail-safe output state selection via ordering option. The device requires only 0.1 µF and 10 µF bypass capacitors per supply rail and exhibits 50 Ω ±40% nominal output impedance for controlled-impedance PCB routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, CAN FD, and real-time motor control feedback loops |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for 1-minute withstand |
| Propagation delay | 10 ns typical - enables sub-20 ns round-trip latency in closed-loop isolated gate drivers |
| Pulse width distortion | 3.5 ns typical - preserves duty cycle integrity for PWM signals in isolated SMPS controllers |
| CMTI | ≥100 kV/µs - ensures reliable operation in high-dV/dt environments like traction inverters and motor drives |
| Supply voltage | 2.25–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V analog front-ends without level shifters |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Safety certification | AEC-Q100 Grade 0 - validated for automotive applications including onboard chargers and BMS |
Pinout & Package
SI86S661BB-AUR is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance) with 6.0 kVRMS isolation capability. Pin 1 is VDD1; pin 16 is VDD2; GND1 (pin 8) and GND2 (pin 9) are separated by the isolation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Independent power supplies | Side A and Side B each require local 0.1 µF + 10 µF bypassing; no shared supply constraint |
| GND1, GND2 | Isolated ground references | Must be routed on separate PCB planes; no direct connection permitted across isolation barrier |
| A1–A6 | Digital I/O (Side A) | Bidirectional channels; logic levels referenced to VDD1/GND1; Schmitt-trigger + CMOS thresholds |
| B1–B6 | Digital I/O (Side B) | Bidirectional channels; logic levels referenced to VDD2/GND2; fully symmetric to A-side functionality |
| EN1, EN2 | Active-high output enable | Tri-states all outputs on respective side; enables single-point control of isolated interface readiness |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay; outputs follow inputs immediately after UVLO exit (~0.3 ms) |
| Selectable fail-safe mode | Ordering option determines default output state (high or low) when input supply is unpowered but output supply remains active |
| High electromagnetic immunity | 100 kV/µs common-mode transient immunity ensures robustness in noisy motor drive and inverter environments |
| Low power with sleep mode | Supports external pin-controlled sleep mode (not enabled in SI86S661BB-AUR variant); quiescent current <2.8 mA per side at 5 V |
| Reinforced safety certification | UL 1577, CSA 62368-1/60601-1, VDE 60747-17, CQC GB4943.1 - accepted for end-equipment safety approvals |
| Automotive-grade manufacturing | Produced using automotive-specific process flows with AIAG-compliant PPAP and IMDS/CAMDS documentation support |
Applications
| Motor Control Systems | Onboard Chargers (OBC) |
|---|---|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stages for EV traction motors. IC Role / Device Role / Timing Role: Six-channel digital isolator providing bidirectional signal transfer across high-voltage barriers with <10 ns propagation delay. Use Value: Enables precise timing alignment between PWM commands and sensed currents, reducing torque ripple and improving efficiency. | Use Scenario: Isolating communication and control signals between AC/DC front-end and DC/DC secondary stage in 11–22 kW OBCs. IC Role / Device Role / Timing Role: Reinforced isolator handling UART, SPI, and fault signaling with 6000 VRMS withstand for functional safety compliance. Use Value: Eliminates need for optocouplers or discrete isolation solutions, reducing BOM count and board space while meeting IEC 62109. |
| Battery Management Systems | Industrial PLC I/O Modules |
Use Scenario: Isolating cell voltage monitoring, temperature sensing, and balancing command signals between high-voltage battery packs and MCU subsystems. IC Role / Device Role / Timing Role: Six-channel isolator supporting daisy-chained ADC interfaces and isolated GPIO for pack-level supervision. Use Value: Provides certified reinforced insulation for >1000 V battery stacks while maintaining sub-microsecond signal fidelity for fast fault response. | Use Scenario: Isolating digital input/output signals between field-side sensors/actuators and controller-side logic in modular PLC backplanes. IC Role / Device Role / Timing Role: High-CMTI isolator enabling reliable 24 V DC input conditioning and 24 V/100 mA output driving in electrically noisy factory environments. Use Value: Prevents ground loop interference and EMI-induced false triggering, improving system uptime and diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6601ARIZ-RL | Integrated isolated DC-DC converter; 6-channel; 25 Mbps max; 3750 VRMS isolation; no AEC-Q100 rating | Preferred where auxiliary power is needed on isolated side; unsuitable for 150 Mbps or automotive-grade reliability | Choose ADUM6601ARIZ-RL only if isolated power is required and speed/safety certification are secondary |
| ISO6760FDWR | 6-channel; 50 Mbps; 5000 VRMS; 2.25–5.5 V; AEC-Q100 Grade 1; no selectable fail-safe mode | Valid for industrial automation but lacks fail-safe configuration flexibility and 6000 VRMS rating for high-voltage OBC/BMS | Choose ISO6760FDWR for cost-sensitive non-automotive designs where 50 Mbps suffices and fail-safe state is fixed |
Compared with ADUM6601ARIZ-RL and ISO6760FDWR, SI86S661BB-AUR delivers 3× higher data rate than ISO6760FDWR and 6× higher than ADUM6601ARIZ-RL, plus AEC-Q100 Grade 0 qualification and 6000 VRMS isolation-making it uniquely suited for high-performance automotive traction and charging systems.
Availability
SI86S661BB-AUR is available at Aetrix Electronics and suitable for motor control systems, onboard chargers, battery management systems, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI86S661BB-AUR 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 electrification and industrial automation-emphasizing reinforced safety, low-latency timing, and robust CMTI performance.
FAQ
What is the isolation voltage rating of the SI86S661BB-AUR and which safety standards does it meet?
The SI86S661BB-AUR has a 6000 VRMS isolation rating per UL 1577 for 1 minute and is certified to IEC 60747-17 (reinforced insulation), CSA 62368-1/60601-1, and CQC GB4943.1. These certifications validate its use in high-voltage automotive and industrial systems where reinforced insulation is mandated, such as in traction inverters and medical power supplies. SI86S661BB-AUR meets all specified limits without derating.
Does the SI86S661BB-AUR support fail-safe output configuration, and how is it selected?
Yes, SI86S661BB-AUR offers a selectable fail-safe mode where the default output state (high or low) is determined at manufacture via ordering option. This behavior activates when the input-side supply (VDD1) is unpowered but the output-side supply (VDD2) remains active. The setting is fixed per part number and cannot be changed in-circuit. SI86S661BB-AUR's ordering code indicates the configured default state.
What are the supply voltage requirements and bypassing recommendations for SI86S661BB-AUR?
SI86S661BB-AUR operates with independent 2.25–5.5 V supplies on both sides (VDD1 and VDD2). Each supply requires a 0.1 µF ceramic capacitor placed adjacent to the pin and a 10 µF bulk capacitor nearby. No level-shifting circuitry is needed between 3.3 V and 5 V domains. SI86S661BB-AUR tolerates supply ramp rates up to 1 V/µs and includes undervoltage lockout with 2.18 V typical threshold.
How does the SI86S661BB-AUR handle power-up sequencing and reset behavior?
SI86S661BB-AUR features independent UVLO and reset circuits per side. When VDD1 or VDD2 rises above ~2.18 V, outputs enter a 0.3 ms stabilization period before following inputs. Below ~1.7 V (RSTB–), the device asserts full reset and reloads configuration upon recovery. Outputs are pulled low via 100 kΩ resistors during unpowered states. SI86S661BB-AUR requires no external reset circuitry.
Is the SI86S661BB-AUR pin-compatible with other devices in the Si86S6xx family?
Yes, SI86S661BB-AUR shares identical WB SOIC-16 pinout and channel mapping with all Si86S66x variants (e.g., SI86S660, SI86S662, SI86S663), differing only in channel count and fail-safe configuration. All Si86S66x devices use pins A1–A6 and B1–B6 for I/O, EN1/EN2 for side-enable, and VDD1/GND1/VDD2/GND2 in fixed locations. SI86S661BB-AUR can be substituted within this group without layout changes.
SI86S661BB-AUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 5/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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-QSOP
SI86S661BB-AUR FAQ
1.How can I place an order for SI86S661BB-AUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S661BB-AUR 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 SI86S661BB-AUR reliable?
The price and inventory of SI86S661BB-AUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S661BB-AUR is usually 5 days.
3.What payment methods are accepted for SI86S661BB-AUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S661BB-AUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S661BB-AUR?
SI86S661BB-AUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S661BB-AUR 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 SI86S661BB-AUR?
For technical support, including SI86S661BB-AUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S661BB-AUR requirements.
6.How does Aetrix verify that SI86S661BB-AUR is sourced from the original manufacturer or authorized distributors?
All SI86S661BB-AUR 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 SI86S661BB-AUR meets industry standards.
7.What is the process for return or replacement of SI86S661BB-AUR?
All SI86S661BB-AUR units undergo pre-shipment inspection (PSI). If there is an issue with SI86S661BB-AUR, 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 SI86S661BB-AUR part is unused and in its original packaging.
Return procedure for SI86S661BB-AUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S661BB-AUR 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
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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