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Skyworks Solutions Inc. SI86S661BB-IUR
- Part No.:
- SI86S661BB-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S661BB-IUR.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 6 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
SI86S661BB-IUR from Skyworks Solutions is a six-channel, bidirectional digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and 10 ns typical propagation delay. It operates across 2.25–5.5 V supplies on both sides and supports fail-safe default-high output mode. Used in isolated motor control gate drivers and battery management system communication interfaces.
For engineers reviewing the SI86S661BB-IUR datasheet, SI86S661BB-IUR pinout, SI86S661BB-IUR application, or SI86S661BB-IUR equivalent, key selection criteria include reinforced IEC 60747-17 certification, AEC-Q100 qualification for automotive use, tri-state output enable, and precise timing performance under –40 to 125 °C operation.
Technical Context
The SI86S661BB-IUR implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity. It features independent undervoltage lockout (UVLO) and reset circuitry per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO+ at 2.18 V.
Its architecture supports simultaneous six-channel bidirectional data transfer with Schmitt-trigger + CMOS threshold inputs, 36 ns input deglitch filtering option (not enabled in this variant), and selectable fail-safe output state during power loss-here configured as default-high via ordering code 'B'.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, QSPI, and real-time control loop signaling without protocol translation. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for industrial & automotive safety-critical systems. |
| Propagation delay | 10 ns typical - enables sub-20 ns round-trip latency in closed-loop isolated feedback paths. |
| Supply voltage | 2.25–5.5 V per side - interoperable with 3.3 V and 5 V logic domains without level shifters. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial motor drive environments. |
| Fail-safe mode | Default high output - ensures safe logic-high state on isolated outputs during VDD1 loss while VDD2 remains powered. |
| CMTI | 100 kV/µs minimum - suppresses common-mode transients induced by fast-switching SiC/GaN power stages. |
Pinout & Package
SI86S661BB-IUR uses a WB SOIC-16 (wide-body small-outline integrated circuit) package with creepage/clearance optimized for 6000 VRMS reinforcement. Pin 1 is marked with a dot; pin 16 is VDD2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides bias for primary-side transmitter circuits; requires 0.1 µF + 10 µF local bypassing. |
| A1–A6 | Side A digital I/O | Bidirectional isolated channels; support CMOS/Schmitt-trigger inputs and 50 Ω nominal output impedance. |
| VDD2, GND2 | Side B power supply | Independent secondary-side supply; enables galvanic separation between controller and power stage domains. |
| B1–B6 | Side B digital I/O | Corresponding isolated outputs/inputs; maintain signal integrity up to 150 Mbps with <3.5 ns pulse width distortion. |
| EN1, EN2 | Active-high output enable | Tri-states all outputs on respective side; allows shared bus arbitration and low-power sleep coordination. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF carrier modulation eliminates boot sequence delays-output follows input immediately after UVLO exit. |
| Reinforced IEC 60747-17 rating | Validated barrier withstand capability enables use in medical (60601-1) and industrial (62368-1) safety-certified end equipment. |
| Tri-state outputs with enable | EN1/EN2 pins allow dynamic bus contention avoidance in multi-master isolated networks without external logic. |
| Selectable fail-safe mode | Ordering code 'B' configures default-high output during VDD1 loss-critical for keeping gate drivers enabled during controller brownout. |
| High electromagnetic immunity | 100 kV/µs CMTI and RF-based architecture reject switching noise from adjacent 100+ kHz power converters. |
Applications
| Motor Control Gate Driver Interface | Automotive Battery Management System |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and SiC/GaN half-bridge drivers in traction inverters. IC Role / Device Role / Timing Role: Six-channel bidirectional isolator transmitting gate enable/disable commands and desaturation fault signals across 6000 VRMS barrier. Use Value: 10 ns propagation delay ensures <20 ns total loop latency; reinforced insulation meets ISO 26262 ASIL-D functional safety requirements. | Use Scenario: Communicating cell voltage and temperature measurements from isolated slave boards to master controller in EV battery packs. IC Role / Device Role / Timing Role: High-speed SPI isolation channel with fail-safe default-high output preventing false shutdown during transient MCU supply dips. Use Value: AEC-Q100 Grade 0 qualification and –40 to 125 °C operation ensure reliability in under-chassis thermal environments. |
| Industrial Isolated ADC/DAC Interface | Isolated Switch-Mode Power Supply Feedback |
Use Scenario: Transmitting precision analog-to-digital conversion results from isolated sensor front-ends to host processors in PLC modules. IC Role / Device Role / Timing Role: Low-jitter, low-distortion digital isolator preserving timing integrity of oversampled sigma-delta data streams. Use Value: 3.5 ns pulse width distortion prevents duty-cycle degradation in time-sensitive measurement protocols. | Use Scenario: Delivering isolated error amplifier output and synchronous rectifier control signals in 1–3 kW telecom rectifiers. IC Role / Device Role / Timing Role: Bidirectional isolator carrying feedback loop correction data and gate drive enable signals across reinforced barrier. Use Value: 150 Mbps capability supports high-frequency current-mode control loops up to 1 MHz switching frequency. |
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; 50 Mbps max data rate; 25 ns propagation delay; 3750 VRMS isolation. | Lacks reinforced 6000 VRMS rating and AEC-Q100 qualification; suitable for non-automotive industrial use only. | Choose when board space is constrained and isolated power is needed-but not for ASIL-D or 6 kVRMS compliance. |
| ISO6761RQWR | 6-channel, 50 Mbps, 3000 VRMS; no AEC-Q100; 15 ns propagation delay; 2.25–5.5 V supply. | Lower isolation rating and timing performance; lacks fail-safe default-high option and reinforced certification. | Acceptable for cost-sensitive industrial automation where 6 kVRMS and automotive qualification are not required. |
Compared with ADUM6601ARIZ-RL and ISO6761RQWR, SI86S661BB-IUR delivers higher data rate, tighter timing, reinforced safety certification, and automotive qualification-making it the only choice for high-performance, safety-critical isolated control in EV and industrial power systems.
Availability
SI86S661BB-IUR is available at Aetrix Electronics and suitable for motor control gate driver interfaces, automotive battery management systems, and isolated switch-mode power supply feedback requiring stable component supply and long-term lifecycle support.
Supply support for SI86S661BB-IUR 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 is designed for high-reliability, high-speed digital isolation in automotive, industrial, and medical systems-emphasizing reinforced safety, low-latency timing, and robust EMI immunity.
FAQ
What is the isolation voltage rating of the SI86S661BB-IUR and which safety standards does it meet?
The SI86S661BB-IUR provides 6000 VRMS reinforced isolation per UL 1577 for 1 minute and is certified to IEC 60747-17 (reinforced), CSA 62368-1/60601-1, and CQC GB4943.1. This enables its use in high-voltage industrial drives and automotive traction inverters where reinforced insulation is mandated.
Does the SI86S661BB-IUR require external startup configuration or initialization firmware?
No, the SI86S661BB-IUR uses RF-based on/off keying modulation and requires no startup initialization. Outputs follow inputs immediately after exiting undervoltage lockout (UVLO), with a typical 0.3 ms start-up time from unpowered state-ensuring deterministic behavior in safety-critical systems.
What does the 'B' in SI86S661BB-IUR indicate regarding fail-safe behavior?
The second 'B' in SI86S661BB-IUR denotes the fail-safe ordering option for default-high output: when VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic high. This prevents unintended gate turn-off in motor driver applications during controller supply faults.
Can the SI86S661BB-IUR support SPI or QSPI protocols natively?
The SI86S661BB-IUR is a general-purpose six-channel isolator-not a dedicated SPI/QSPI isolator like Si86SSxx or Si86SQxx variants. However, its 150 Mbps data rate, low skew, and bidirectional channels support custom SPI/QSPI implementations with external direction control logic.
Is the SI86S661BB-IUR qualified for automotive applications, and what grade does it meet?
Yes, the SI86S661BB-IUR is AEC-Q100 qualified for Grade 0 (–40 to +125 °C), with full PPAP documentation support and IMDS/CAMDS compliance. It is approved for use in onboard chargers, battery management systems, and traction inverters in battery electric vehicles.
SI86S661BB-IUR 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:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 5/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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-QSOP
SI86S661BB-IUR FAQ
1.How can I place an order for SI86S661BB-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S661BB-IUR 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-IUR reliable?
The price and inventory of SI86S661BB-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S661BB-IUR is usually 5 days.
3.What payment methods are accepted for SI86S661BB-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S661BB-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S661BB-IUR?
SI86S661BB-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S661BB-IUR 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-IUR?
For technical support, including SI86S661BB-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S661BB-IUR requirements.
6.How does Aetrix verify that SI86S661BB-IUR is sourced from the original manufacturer or authorized distributors?
All SI86S661BB-IUR 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-IUR meets industry standards.
7.What is the process for return or replacement of SI86S661BB-IUR?
All SI86S661BB-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI86S661BB-IUR, 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-IUR part is unused and in its original packaging.
Return procedure for SI86S661BB-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S661BB-IUR 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.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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