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Skyworks Solutions Inc. SI86S661BC-IS1R
- Part No.:
- SI86S661BC-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S661BC-IS1R.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 6 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
SI86S661BC-IS1R from Skyworks Solutions is a 6-channel, reinforced-isolation digital isolator with bidirectional signal capability across an integrated semiconductor barrier. It supports DC to 150 Mbps data rates, delivers 10 ns typical propagation delay, and operates from 2.25–5.5 V supplies on both sides. It is rated for 6000 VRMS isolation and AEC-Q100 qualified for automotive onboard chargers and battery management systems.
For engineers reviewing the SI86S661BC-IS1R datasheet, SI86S661BC-IS1R pinout, SI86S661BC-IS1R application, or SI86S661BC-IS1R equivalent, key selection criteria include its 6-channel configuration, fail-safe default-low output option (indicated by "B" in part number), WB SOIC-16 package with 8.3 mm creepage, and compatibility with industrial motor control and automotive traction inverter signal isolation.
Technical Context
The SI86S661BC-IS1R implements RF-based on/off keying modulation across a monolithic silicon dioxide isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its architecture includes independent undervoltage lockout (UVLO) and reset circuits per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.
All six channels are bidirectional I/Os with Schmitt-trigger + CMOS input thresholds, tri-state output control via EN1/EN2 pins, and selectable fail-safe mode (default low, per "B" suffix). The device supports simultaneous high-noise immunity (100 kV/µs CMTI) and low quiescent current - 2.19 mA (Side 1) / 2.47 mA (Side 2) at static logic levels under 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed serial interfaces including isolated SPI and digital power control loops. |
| Propagation delay | 10 ns typical - enables tight timing budgets in real-time motor control and ADC sampling synchronization. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for >1000 V working voltage systems. |
| Supply range | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level shifters. |
| Fail-safe mode | Default low output - ensures safe state during VDD1 loss in critical applications like gate driver enable/disable signaling. |
| Operating temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments. |
| CMTI | ≥100 kV/µs - prevents false triggering in high-dV/dt noise environments such as IGBT/SiC inverter switching nodes. |
Pinout & Package
SI86S661BC-IS1R uses a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, supporting 6000 VRMS reinforced isolation. Pin numbering follows standard SOIC-16 layout (pin 1 = VDD1, pin 16 = VDD2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Independent supply inputs | Enable galvanic separation of logic domains; each side powers its own transceivers and receivers. |
| GND1, GND2 | Isolated ground references | Must be routed on separate PCB planes; no shared ground connection across isolation barrier. |
| A1–A6 | Side A bidirectional I/Os | Support configurable direction per channel; compatible with CMOS/Schmitt-trigger logic families. |
| B1–B6 | Side B bidirectional I/Os | Electrically mirrored to A-side; signals cross isolation barrier with sub-10 ns skew. |
| EN1, EN2 | Active-high output enables | Tri-state all outputs on respective side - used for bus arbitration or power sequencing coordination. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Immediate functional readiness after VDD exceeds UVLO+ (2.18 V), eliminating boot-time delays in safety-critical power systems. |
| Reinforced IEC 60747-17 rating | Validated die-level insulation integrity for lifetime reliability in automotive and medical applications requiring dual-fault protection. |
| Schmitt trigger + CMOS thresholds | Combines noise margin (hysteresis ≥0.15×VDD) with fast edge detection for robust operation in EMI-heavy motor drive environments. |
| Tri-state outputs with enable | EN1/EN2 allow dynamic bus contention avoidance - essential for multi-master isolated communication buses. |
| Precise timing specs | 3.5 ns pulse width distortion ensures minimal duty cycle degradation in PWM signal isolation for gate drivers. |
Applications
| Industrial Motor Control | Automotive Onboard Charger |
|---|---|
Use Scenario: Isolating PWM signals between MCU and 3-phase IGBT/SiC gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Six-channel bidirectional isolator transmitting gate enable, fault feedback, and current sense signals across 1000 VDC bus. Use Value: 10 ns propagation delay and 3.5 ns pulse width distortion preserve PWM fidelity, preventing shoot-through and ensuring precise dead-time control. | Use Scenario: Signal isolation between primary-side AC/DC controller and secondary-side DC/DC converter in EV onboard chargers. IC Role / Device Role / Timing Role: Isolating analog feedback (isolated ADC), digital control (SPI), and safety interlock signals across reinforced barrier. Use Value: 6000 VRMS rating and AEC-Q100 qualification ensure compliance with ISO 6469-3 and UN ECE R100 for high-voltage EV charging systems. |
| Isolated Switch Mode Supply | Battery Management System |
Use Scenario: Feedback path isolation in isolated DC/DC converters using opto-coupler replacement topology. IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronous rectifier control signals across primary-secondary boundary. Use Value: 150 Mbps capability supports high-frequency (>1 MHz) GaN-based converters; low 2.2 mA quiescent current improves light-load efficiency. | Use Scenario: Cell voltage monitoring and pack contactor control isolation in high-voltage EV battery packs (up to 900 V). IC Role / Device Role / Timing Role: Isolating UART/ISO-7816 communication and high-side switch control between BMS MCU and analog front-end. Use Value: –40 °C to +125 °C operation and 100 kV/µs CMTI withstand capability prevent misoperation during rapid battery discharge or thermal stress events. |
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, integrated isolated DC-DC converter (3.3 V out), 3750 VRMS rating | Lacks 6000 VRMS and AEC-Q100 qualification; suitable for lower-voltage industrial SMPS but not automotive traction systems | Select when isolated power + signal is required and 6000 VRMS is not mandated. |
| ISO6760FQDWR | 6-channel, 50 Mbps, 5000 VRMS, no AEC-Q100, SOIC-16 NB package (smaller creepage) | Lower isolation rating and no automotive qualification limit use to non-safety-critical industrial subsystems | Choose for cost-sensitive, space-constrained designs where 6000 VRMS and automotive grade are unnecessary. |
Compared with ADUM6601ARIZ-RL and ISO6760FQDWR, SI86S661BC-IS1R provides higher data rate (150 vs. 50 Mbps), certified 6000 VRMS reinforced isolation, and full AEC-Q100 qualification - making it the only option among the three suitable for automotive onboard charger control and high-reliability industrial inverters.
Availability
SI86S661BC-IS1R is available at Aetrix Electronics and suitable for industrial motor control, automotive onboard chargers, and isolated switch mode supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SI86S661BC-IS1R 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 engineered for high-reliability signal isolation in harsh environments - targeting automotive electrification, industrial automation, and medical equipment where reinforced insulation, AEC-Q100 compliance, and sub-10 ns timing are mandatory.
FAQ
What is the isolation rating and certification status of SI86S661BC-IS1R?
SI86S661BC-IS1R is rated for 6000 VRMS isolation per UL 1577 (1 minute) and carries reinforced insulation certification per IEC 60747-17, CSA 62368-1/60601-1, and CQC GB4943.1. These certifications are fully documented in Skyworks' safety file and apply directly to the SI86S661BC-IS1R WB SOIC-16 package configuration.
Does SI86S661BC-IS1R support fail-safe operation, and how is it configured?
Yes, SI86S661BC-IS1R implements selectable fail-safe mode: the "B" in the part number denotes default-low output behavior during VDD1 loss while VDD2 remains powered. This is hardwired at manufacture and requires no external configuration - ensuring predictable safe-state behavior in gate driver enable lines or fault-reporting paths.
What package type and creepage distance does SI86S661BC-IS1R use?
SI86S661BC-IS1R is supplied in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance. This mechanical construction enables its 6000 VRMS reinforced isolation rating and satisfies IPC-2221B requirements for ≥1000 V working voltage systems.
Can SI86S661BC-IS1R be used in SPI isolation applications?
Yes, SI86S661BC-IS1R supports SPI isolation through its six independent bidirectional channels - allocating A1/B1 for SCLK, A2/B2 for MOSI/MISO, A3/B3 for CS, and A4/B4 for optional interrupt or ready signals. Its 150 Mbps capability exceeds standard SPI speeds, and its low 10 ns propagation delay preserves timing margins in high-frequency implementations.
What is the supply voltage range and quiescent current of SI86S661BC-IS1R?
SI86S661BC-IS1R operates from 2.25 V to 5.5 V on both VDD1 and VDD2 rails. At 5 V and static logic conditions, its typical quiescent current is 2.19 mA (Side 1) and 2.47 mA (Side 2), as specified in Table 10 of the datasheet - enabling efficient operation in battery-backed or low-power industrial subsystems.
SI86S661BC-IS1R 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:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 5/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- 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
SI86S661BC-IS1R FAQ
1.How can I place an order for SI86S661BC-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S661BC-IS1R 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-IS1R reliable?
The price and inventory of SI86S661BC-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S661BC-IS1R is usually 5 days.
3.What payment methods are accepted for SI86S661BC-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S661BC-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S661BC-IS1R?
SI86S661BC-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S661BC-IS1R 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-IS1R?
For technical support, including SI86S661BC-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S661BC-IS1R requirements.
6.How does Aetrix verify that SI86S661BC-IS1R is sourced from the original manufacturer or authorized distributors?
All SI86S661BC-IS1R 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-IS1R meets industry standards.
7.What is the process for return or replacement of SI86S661BC-IS1R?
All SI86S661BC-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S661BC-IS1R, 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-IS1R part is unused and in its original packaging.
Return procedure for SI86S661BC-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S661BC-IS1R Tags
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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
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ISO7721DR
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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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