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Skyworks Solutions Inc. SI86S661BC-AS1R
- Part No.:
- SI86S661BC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S661BC-AS1R.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 6 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:3,808
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Product details
Overview
SI86S661BC-AS1R from Skyworks Solutions is a 6-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features dual supply operation (2.25–5.5 V), 10 ns typical propagation delay, and selectable fail-safe output (default low) for isolated communication in battery management and traction inverters.
For engineers reviewing the SI86S661BC-AS1R datasheet, SI86S661BC-AS1R pinout, SI86S661BC-AS1R application, or SI86S661BC-AS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, 100 kV/µs CMTI, tri-state outputs with enable, Schmitt-trigger inputs, and WB SOIC-16 package compatibility with 8 mm creepage/clearance.
Technical Context
The SI86S661BC-AS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent UVLO monitoring per side (VDDUV+ = 2.18 V typ), RSTB reset threshold (~1.7 V), and fail-safe default-low output behavior during unpowered conditions on Side A.
It integrates six bidirectional digital channels with CMOS/Schmitt-trigger inputs, 50 Ω nominal output impedance, and precise timing: 3.5 ns pulse width distortion and 10 ns propagation delay (typ). Sleep mode is not implemented-this variant lacks SMb pin functionality and uses EN1/EN2 for tri-state control only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, CAN FD, and isolated ADC interfaces without protocol translation. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for automotive BMS and OBC applications. |
| Propagation delay | 10 ns (typ) - enables tight timing budgets in motor control gate drivers and real-time feedback loops. |
| CMTI | ≥100 kV/µs - ensures reliable operation in high-dV/dt environments like power inverters and industrial drives. |
| Supply voltage | 2.25–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Operating temp | –40 to +125 °C - qualified for under-hood automotive use and industrial ambient conditions. |
| Fail-safe mode | Default low output - prevents undefined states during power loss in safety-critical signal paths. |
Pinout & Package
SI86S661BC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.0 mm creepage and clearance, supporting 6000 VRMS isolation. Pinout follows Figure 4 (Si86S66x) in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Side A / Side B supply | Independent 2.25–5.5 V supplies; require 0.1 µF + 10 µF bypassing per side. |
| GND1, GND2 | Side A / Side B ground | Galvanically isolated reference planes; no shared ground connection permitted. |
| A1–A6 | Side A digital I/O | Bidirectional channels; Schmitt-trigger inputs with 0.15×VDD hysteresis for noise rejection. |
| B1–B6 | Side B digital I/O | Corresponding isolated outputs/inputs; 50 Ω nominal output impedance for controlled-impedance routing. |
| EN1, EN2 | Active-high enable | Tri-states all outputs on respective side; no internal pull-up-requires external bias if left floating. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay-output follows input immediately after UVLO exit (tSTART = 0.3 ms). |
| Reinforced insulation | IEC 60747-17 certified at 6000 VRMS-enables single-package isolation in medical (60601-1) and EV traction systems. |
| High CMTI | 100 kV/µs minimum common-mode transient immunity-prevents data corruption in 1200 V SiC inverter switching noise. |
| Tri-state outputs | EN1/EN2 pins provide side-level output disable-supports bus arbitration and hot-swap capability in modular systems. |
| Selectable fail-safe | Default-low ordering option ensures safe de-energization of downstream logic during VDD1 loss in BMS monitoring circuits. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage measurement and pack current sensing signals between high-voltage battery stack and MCU-side monitor IC. IC Role / Device Role / Timing Role: Six-channel digital isolator transmitting ADC conversion results and fault flags across 6000 VRMS barrier with <10 ns skew. Use Value: Enables ASIL-B compliant monitoring by guaranteeing deterministic timing and reinforced insulation per ISO 26262. | Use Scenario: Transmitting PWM gate drive signals and fault feedback from isolated gate driver ICs to main inverter controller. IC Role / Device Role / Timing Role: High-speed, low-skew isolator delivering synchronized 150 Mbps control pulses with 3.5 ns pulse width distortion. Use Value: Prevents shoot-through in SiC MOSFET half-bridges by maintaining precise edge alignment under 100 kV/µs transients. |
| Onboard Charger (OBC) | Industrial PLC I/O Module |
Use Scenario: Isolating communication between AC/DC PFC controller and DC/DC LLC controller in bi-directional OBC topologies. IC Role / Device Role / Timing Role: Bidirectional 6-channel isolator carrying UART, SPI, and status signals across reinforced barrier with independent VDD1/VDD2 domains. Use Value: Eliminates ground loop interference and meets CISPR-25 Class 5 EMI limits in automotive charging systems. | Use Scenario: Providing channel-isolated digital input/output for 24 V sensor/actuator interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Industrial-grade isolator with –40 to +125 °C operation and 6000 VRMS withstand supporting DIN rail-mounted I/O modules. Use Value: Reduces system-level certification cost by replacing discrete optocouplers and external protection components. |
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 | 6-channel, 6000 VRMS, but integrated isolated DC-DC converter (500 mW); higher quiescent current (1.8 mA/channel). | Eliminates need for external isolated supply; unsuitable where external 3.3/5 V rails are already available and space-constrained. | Choose ADUM6601ARIZ-RL when isolated power + signal is required in one package; SI86S661BC-AS1R when optimizing for lowest power and board area. |
| ISO6760FDWR | 6-channel, 5000 VRMS (not reinforced), 50 Mbps max data rate, lower CMTI (85 kV/µs), SOIC-16 NB package. | Limited to non-safety-critical industrial applications; insufficient for automotive AEC-Q100 or medical 60601-1 compliance. | Choose ISO6760FDWR for cost-sensitive non-automotive designs; SI86S661BC-AS1R when 6000 VRMS, 150 Mbps, and AEC-Q100 are mandatory. |
Compared with ADUM6601ARIZ-RL and ISO6760FDWR, SI86S661BC-AS1R delivers the highest combination of speed (150 Mbps), noise immunity (100 kV/µs), and safety certification (IEC 60747-17 reinforced) in a minimal-footprint WB SOIC-16, making it optimal for space- and performance-constrained automotive power electronics.
Availability
SI86S661BC-AS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, onboard chargers, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI86S661BC-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 leader in analog and mixed-signal semiconductors, specializing in RF, wireless infrastructure, and high-reliability isolation technologies.
The Si86S6xx family was designed specifically for automotive and industrial applications demanding reinforced isolation, high-speed data integrity, and AEC-Q100 qualification-targeting electric vehicle powertrain and factory automation systems.
FAQ
What is the isolation rating and safety certification status of SI86S661BC-AS1R?
SI86S661BC-AS1R provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation). It also meets CSA 62368-1 and 60601-1, and CQC GB4943.1. These certifications are fully documented and validated for automotive and medical end-equipment compliance. SI86S661BC-AS1R is AEC-Q100 qualified for Grade 0 (–40 to +125 °C).
Does SI86S661BC-AS1R support sleep mode or low-power operation?
No, SI86S661BC-AS1R does not implement sleep mode-it lacks the SMb pin found in Si86SMx variants. It operates in standard low-quiescent-current mode with typical IDD1/IDD2 of 1.28–2.27 mA (per side, 500 kHz toggle). Power reduction is achieved via EN1/EN2 tri-state control, not deep-sleep circuitry. For sleep-capable alternatives, consider Si86SM61BC-AS1R.
What is the default output state during power loss on Side A for SI86S661BC-AS1R?
SI86S661BC-AS1R is ordered with default-low fail-safe mode (denoted by "B" in part number suffix). When VDD1 is unpowered (<2.25 V) but VDD2 remains active, all B1–B6 outputs are driven low. This behavior is guaranteed by internal circuitry and verified in Table 4 of the datasheet, ensuring safe shutdown in BMS and inverter control paths.
Can SI86S661BC-AS1R be used in SPI or QSPI interfaces?
Yes, SI86S661BC-AS1R supports SPI isolation using any combination of its six channels-for example, MOSI, MISO, SCLK, CS, and two auxiliary signals. However, it does not integrate dedicated SPI logic (like Si86SSx) or direction control (like Si86SQ44). Full QSPI requires external direction management; for native QSPI, Si86SQ44 is recommended instead.
What package type and creepage distance does SI86S661BC-AS1R use?
SI86S661BC-AS1R uses the WB SOIC-16 package with 8.0 mm minimum creepage and clearance, enabling 6000 VRMS isolation. This wide-body footprint satisfies reinforced insulation requirements for 1200 V systems per IEC 62368-1 and UL 60950-1. The "AS1R" suffix confirms tape-and-reel packaging with 1000-unit reels.
SI86S661BC-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:
- 6
- Inputs - Side 1/Side 2:
- 5/1
- 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
SI86S661BC-AS1R FAQ
1.How can I place an order for SI86S661BC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S661BC-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 SI86S661BC-AS1R reliable?
The price and inventory of SI86S661BC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S661BC-AS1R is usually 5 days.
3.What payment methods are accepted for SI86S661BC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S661BC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S661BC-AS1R?
SI86S661BC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S661BC-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 SI86S661BC-AS1R?
For technical support, including SI86S661BC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S661BC-AS1R requirements.
6.How does Aetrix verify that SI86S661BC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI86S661BC-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 SI86S661BC-AS1R meets industry standards.
7.What is the process for return or replacement of SI86S661BC-AS1R?
All SI86S661BC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S661BC-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 SI86S661BC-AS1R part is unused and in its original packaging.
Return procedure for SI86S661BC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S661BC-AS1R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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