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Skyworks Solutions Inc. SI86S661BE-IS2R
- Part No.:
- SI86S661BE-IS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S661BE-IS2R.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 6 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
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Product details
Overview
SI86S661BE-IS2R from Skyworks Solutions is a 6-channel, reinforced digital isolator with bidirectional signal isolation across a semiconductor barrier, supporting up to 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating. It operates from 2.25–5.5 V supplies on both sides and is qualified per AEC-Q100 for automotive traction inverters and battery management systems.
For engineers reviewing the SI86S661BE-IS2R datasheet, SI86S661BE-IS2R pinout, SI86S661BE-IS2R application, or SI86S661BE-IS2R equivalent, this device delivers precise timing, fail-safe default-low output configuration, Schmitt-trigger + CMOS input thresholds, and tri-state output enable-key selection criteria for high-noise industrial motor control and isolated ADC interfaces.
Technical Context
The SI86S661BE-IS2R implements RF-based on/off keying modulation across a monolithic semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its architecture supports independent undervoltage lockout (UVLO) and reset monitoring on both sides (VDD1/VDD2), with RSTB– threshold at ~1.7 V and UVLO– at 1.98 V.
It features six unidirectional I/O channels (A1–A6/B1–B6), dual active-high enable inputs (EN1/EN2), and no direction control or sleep mode pins-distinguishing it from Si86SQ44 or Si86SMx variants. The device uses HF XMTR/RCVR circuitry per channel and requires only 0.1 µF + 10 µF bypass capacitors per supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed serial links including isolated SPI and CAN FD physical layer interfaces. |
| Propagation Delay | 10 ns typical - enables tight timing budgets in real-time motor control feedback loops and isolated gate driver timing paths. |
| Isolation Rating | 6000 VRMS - meets reinforced insulation requirements per IEC 60747-17 and UL 1577 for 1-minute withstand, suitable for 1000 VAC working voltage systems. |
| Supply Voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level shifters. |
| Pulse Width Distortion | 3.5 ns typical - ensures minimal duty cycle degradation in clock forwarding or PWM isolation applications. |
| Transient Immunity | ≥100 kV/µs - provides robust operation in high dv/dt environments such as IGBT/SiC inverter switching nodes. |
| Operating Temperature | –40 to +125 °C - validated for under-hood automotive and industrial ambient conditions without derating. |
Pinout & Package
SI86S661BE-IS2R is housed in a WB SOIC-16 (wide-body small-outline integrated circuit) package with 16 leads, providing ≥8.3 mm creepage and clearance for 6000 VRMS isolation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A power supply | Supplies primary-side logic and transmitter circuits; must be decoupled with 0.1 µF + 10 µF capacitors. |
| GND1 | Side A ground | Reference return for Side A signals; must be separated from GND2 by isolation barrier. |
| A1–A6 | Side A digital inputs/outputs | Unidirectional channels from Side A to Side B; each has Schmitt-trigger + CMOS threshold for noise immunity. |
| EN1 | Side A output enable | Active-high control: drives all Side A outputs into high-impedance state when low. |
| Isolation Barrier | Internal die separation | Monolithic semiconductor barrier rated for 6000 VRMS; defines creepage/clearance between Side A and Side B pins. |
| B1–B6 | Side B digital inputs/outputs | Unidirectional channels from Side B to Side A; electrically isolated but functionally paired with A1–A6. |
| EN2 | Side B output enable | Active-high control: drives all Side B outputs into high-impedance state when low. |
| GND2 | Side B ground | Reference return for Side B signals; galvanically isolated from GND1. |
| VDD2 | Side B power supply | Supplies secondary-side logic and receiver circuits; independent of VDD1, enabling dual-supply system partitioning. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot sequence delays-output transitions begin immediately after VDD exceeds UVLO+ (2.18 V). |
| Selectable fail-safe mode | SI86S661BE-IS2R is ordered with default-low output during unpowered conditions (VDD1 < 2.25 V), ensuring safe shutdown in BMS fault states. |
| High electromagnetic immunity | 100 kV/µs common-mode transient immunity (CMTI) prevents data corruption near high-power switching nodes in inverters. |
| Tri-state outputs with enable | EN1/EN2 pins allow synchronized bus contention control across all six channels-critical for shared isolated communication buses. |
| Schmitt trigger + CMOS thresholds | Input hysteresis ≥0.15 × VDDx rejects sub-36 ns noise pulses while maintaining compatibility with standard CMOS logic families. |
| AEC-Q100 qualification | Qualified to Grade 0 (–40 to +150 °C junction), including HTOL, TC, and ESD testing-validates reliability for automotive traction systems. |
Applications
| Motor Control Feedback | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating encoder position signals and current-sense ADC outputs in 3-phase PMSM servo drives. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator conveying PWM timing, analog-to-digital conversion results, and fault flags across high-voltage barriers. Use Value: 10 ns propagation delay preserves phase alignment between current sampling and gate drive timing, reducing torque ripple by ≤1.2%. |
Use Scenario: Connecting isolated sigma-delta ADCs (e.g., AMC1306) to MCU over SPI while maintaining ±0.1% measurement accuracy. IC Role / Device Role / Timing Role: Digital isolator for SCLK, MOSI, MISO, CS, and DRDY lines-enabling full-duplex SPI with 150 Mbps capability. Use Value: 3.5 ns pulse width distortion prevents clock duty cycle skew that would degrade ADC effective resolution below 16 bits. |
| Traction Inverter Gate Drive | Battery Management System |
|
Use Scenario: Isolating gate driver control signals (HO/LO, FAULT, DESAT) between MCU and high-side IGBT/SiC modules in EV inverters. IC Role / Device Role / Timing Role: Reinforced isolator delivering fast, jitter-free PWM edges with fail-safe default-low output during MCU brownout. Use Value: 6000 VRMS rating supports 800 V DC bus systems with 200% safety margin per IEC 60747-17 reinforced insulation requirements. |
Use Scenario: Isolating cell voltage monitoring ICs (e.g., BQ79616) from host MCU in 96-cell BEV battery packs. IC Role / Device Role / Timing Role: Six-channel isolator routing UART, GPIO, and alert signals across isolation barrier while meeting ASIL-B functional safety goals. Use Value: AEC-Q100 Grade 0 qualification and 125 °C ambient operation ensure continuous monitoring during sustained high-temperature charging cycles. |
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, 50 Mbps max, 25 ns propagation delay, 5000 VRMS, integrated isolated DC-DC converter. | Preferred where board space is constrained and isolated power is needed-but adds 15 mA quiescent current overhead. | Choose ADUM6601ARIZ-RL if isolated side power delivery is required; SI86S661BE-IS2R requires external isolated supplies but offers 3× higher speed and lower timing uncertainty. |
| ISO6760FRDWR | 6-channel, 50 Mbps max, 12 ns propagation delay, 5000 VRMS, lower CMTI (85 kV/µs), non-AEC-Q100. | Suitable for industrial automation but not certified for automotive traction systems. | Choose ISO6760FRDWR for cost-sensitive factory automation; SI86S661BE-IS2R is required for AEC-Q100-compliant EV subsystems with >100 kV/µs noise immunity needs. |
Compared with ADUM6601ARIZ-RL and ISO6760FRDWR, SI86S661BE-IS2R delivers the highest data rate (150 Mbps) and strongest noise immunity (100 kV/µs) in its class, making it uniquely suited for time-critical automotive inverter control where deterministic latency and fault resilience are mandatory.
Availability
SI86S661BE-IS2R is available at Aetrix Electronics and suitable for automotive traction inverters, battery management systems, and isolated ADC interfaces requiring stable component supply across extended temperature and high-reliability production programs.
Supply support for SI86S661BE-IS2R 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 high-performance analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The Si86S6xx family was designed specifically for automotive and industrial systems demanding reinforced isolation, AEC-Q100 qualification, and sub-10 ns timing precision-targeting traction inverters, onboard chargers, and high-fidelity sensor interfaces.
FAQ
What is the isolation voltage rating of SI86S661BE-IS2R and which safety standards does it meet?
SI86S661BE-IS2R is rated for 6000 VRMS isolation per UL 1577 (1-minute test) and carries reinforced insulation certification per IEC 60747-17, CSA 62368-1, and VDE 60747-17. These approvals validate its use in safety-critical automotive and medical applications where galvanic separation must withstand transient overvoltages up to 10 kV peak.
Does SI86S661BE-IS2R support bidirectional data flow on individual channels?
No, SI86S661BE-IS2R provides six unidirectional channels (A1→B1 through A6→B6). Directionality is fixed per channel; it does not include DIR or ISO_DIR pins like the Si86SQ44. For bidirectional bus isolation, separate forward/reverse channel pairs or dedicated QSPI isolators are required.
What is the default output state of SI86S661BE-IS2R during power loss on the input side?
SI86S661BE-IS2R is ordered with default-low fail-safe mode: when VDD1 falls below 2.25 V (unpowered), and VDD2 remains powered, all B1–B6 outputs are driven low. This behavior is confirmed in Table 4 of the datasheet and ensures safe shutdown in battery management fault conditions.
Can SI86S661BE-IS2R be used in systems requiring AEC-Q100 qualification?
Yes, SI86S661BE-IS2R is fully AEC-Q100 qualified (Grade 0, –40 to +150 °C junction), including stress testing for HTOL, temperature cycling, and ESD. Its qualification covers the entire WB SOIC-16 package variant and supports PPAP documentation for automotive Tier 1 suppliers.
What bypass capacitance is required for stable operation of SI86S661BE-IS2R?
SI86S661BE-IS2R requires two bypass capacitors per supply rail: a 0.1 µF ceramic capacitor placed adjacent to each VDD/GND pair (VDD1/GND1 and VDD2/GND2), plus a 10 µF bulk capacitor located within 10 mm of the package. This dual-capacitor network suppresses high-frequency switching noise and maintains stable UVLO behavior.
SI86S661BE-IS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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:
- 6000Vrms
- 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-SOIC
SI86S661BE-IS2R FAQ
1.How can I place an order for SI86S661BE-IS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S661BE-IS2R 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 SI86S661BE-IS2R reliable?
The price and inventory of SI86S661BE-IS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S661BE-IS2R is usually 5 days.
3.What payment methods are accepted for SI86S661BE-IS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S661BE-IS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S661BE-IS2R?
SI86S661BE-IS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S661BE-IS2R 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 SI86S661BE-IS2R?
For technical support, including SI86S661BE-IS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S661BE-IS2R requirements.
6.How does Aetrix verify that SI86S661BE-IS2R is sourced from the original manufacturer or authorized distributors?
All SI86S661BE-IS2R 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 SI86S661BE-IS2R meets industry standards.
7.What is the process for return or replacement of SI86S661BE-IS2R?
All SI86S661BE-IS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S661BE-IS2R, 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 SI86S661BE-IS2R part is unused and in its original packaging.
Return procedure for SI86S661BE-IS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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