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Skyworks Solutions Inc. SI8660EC-B-IS1R
- Part No.:
- SI8660EC-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8660EC-B-IS1R.pdf
- Description:
- DGTL ISO 3750VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
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Product details
Overview
SI8660EC-B-IS1R from Skyworks is a six-channel, unidirectional digital isolator with 3.75 kVRMS reinforced isolation, 150 Mbps data rate, <10 ns propagation delay, and selectable high-default fail-safe output mode. It operates from 2.5–5.5 V on both sides and is housed in a RoHS-compliant narrow-body SOIC-16 package for industrial motor control and isolated power supply feedback loops.
For engineers reviewing the SI8660EC-B-IS1R datasheet, SI8660EC-B-IS1R pinout, SI8660EC-B-IS1R application, or SI8660EC-B-IS1R equivalent, this page delivers verified electrical specs, fail-safe behavior under undervoltage, CMTI immunity (50 kV/µs), and precise timing metrics critical for real-time isolated communication in high-noise environments.
Technical Context
The SI8660EC-B-IS1R implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity without optical degradation. Its six channels are all input-side referenced (6 inputs on VDD1 side, 0 on VDD2), supporting unidirectional signal transmission only.
It features independent undervoltage lockout (UVLO) on both sides (VDDUV+ = 2.24 V typ), Schmitt-trigger inputs (VT+ = 1.67 V, VT– = 1.23 V), and failsafe operation where outputs default to logic high when VDD1 is unpowered but VDD2 remains active-enabled by internal pull-ups per ordering option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated ADC/DAC clocking without oversampling. |
| Propagation Delay | 8.0 ns typical - enables sub-10 ns timing-critical isolation in gate driver feedback and real-time motor control loops. |
| Channel-Channel Skew | 0.5 ns typical - ensures synchronized sampling across multiple isolated sensor or PWM channels in multi-axis systems. |
| Common-Mode Transient Immunity | 50 kV/µs - maintains signal integrity during fast-switching events in inverters and SMPS with >1 kV common-mode transients. |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V legacy peripherals without level-shifting. |
| Isolation Rating | 3.75 kVRMS - certified to UL, VDE, CSA, and CQC standards for reinforced insulation in industrial safety-critical applications. |
| Fail-Safe Default Output | High - guarantees known safe state (e.g., disable signal asserted) during input-side power loss in BMS or OBC systems. |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package, 7.5 mm body width, 1.27 mm pitch, RoHS-compliant, JEDEC MS-012-AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDD1-side Inputs (IN1–IN6) | Digital input signals referenced to VDD1/GND1; Schmitt-triggered for noise rejection in noisy industrial environments. |
| 7, 14 | GND1, GND2 | Separate ground references for isolated domains; must not be shorted to preserve galvanic isolation integrity. |
| 8, 9, 10, 11, 12, 13 | VDD2-side Outputs (OUT1–OUT6) | CMOS-compatible outputs referenced to VDD2/GND2; 50 Ω nominal impedance for controlled-impedance trace routing. |
| 15, 16 | VDD1, VDD2 | Independent 2.5–5.5 V supplies per side; each requires local 0.1 µF bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift of optocouplers; enables stable 60-year lifetime at rated working voltage. |
| Selectably high-fail-safe output | Guarantees logic-high output during VDD1 loss-critical for safety shutdown in traction inverters and battery management. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V / 100 Mbps - reduces thermal load in dense PCB layouts and extends system efficiency. |
| Wide temperature range | –40 °C to +125 °C operation - qualified for under-hood automotive and industrial ambient conditions without derating. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use including on-board chargers and hybrid EV power stages per AEC-Q100 Rev G. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating gate driver enable/disable signals and fault feedback between MCU and IGBT/SiC half-bridge drivers in servo drives. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator transmitting PWM control and overcurrent status across 3.75 kVRMS barrier with <10 ns delay. Use Value: Enables precise timing alignment between control and power stages while meeting reinforced insulation requirements for UL 61800-5-1 compliance. |
Use Scenario: Providing isolated feedback for secondary-side voltage regulation and primary-side synchronous rectifier control in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting error amplifier output and SR gate timing signals across isolation boundary with 50 kV/µs CMTI immunity. Use Value: Maintains regulation stability during fast load transients and EMI-rich switching events without false triggering or timing jitter. |
| Battery Management System | Medical Isolated Data Acquisition |
|
Use Scenario: Isolating cell voltage monitoring and pack-level fault signals between analog front-end and host MCU in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Six-channel isolator delivering high-default fail-safe outputs to ensure open-circuit detection and safe shutdown during input-side brownout. Use Value: Meets IEC 61000-4-5 surge immunity and reinforced insulation (IEC 62368-1) for medical-grade battery safety certification. |
Use Scenario: Isolating ADC serial interface (SPI) and calibration signals between patient-connected analog front-end and digital processing unit in portable ECG monitors. IC Role / Device Role / Timing Role: Transmitting sampled biopotential data at up to 150 Mbps with <0.5 ns channel skew to preserve waveform fidelity. Use Value: Supports 60-year reliability and low leakage (<±10 µA) required for IEC 60601-1 patient isolation and creepage/clearance compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6601ARWZ | 6-channel, 25 Mbps max rate, integrated isolated DC-DC converter (5 V output), 2.5 kVRMS rating | Suitable where auxiliary isolated power is needed; lower speed limits use in high-bandwidth feedback paths | Choose ADUM6601ARWZ if board space is constrained and isolated 5 V bias is required-but avoid for >25 Mbps SPI or real-time control. |
| ISO6760FDWR | 6-channel, 50 Mbps max rate, 5 kVRMS, 2.5–5.5 V supply, no fail-safe selection (default low only) | Higher isolation rating suits mains-connected equipment; lacks configurable fail-safe state for safety-critical defaults | Choose ISO6760FDWR for UL 62368-1 reinforced insulation at 5 kVRMS-but verify system-level fail-safe logic compatibility before substitution. |
Compared with ADUM6601ARWZ and ISO6760FDWR, SI8660EC-B-IS1R uniquely combines 150 Mbps speed, 3.75 kVRMS rating, and factory-configured high-default fail-safe behavior-making it optimal for automotive OBCs and industrial inverters requiring both bandwidth and deterministic safety states.
Availability
SI8660EC-B-IS1R is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified reliability.
Supply support for SI8660EC-B-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 leader in high-performance analog semiconductors, specializing in RF, timing, and isolation technologies for communications, automotive, and industrial markets.
The Si866x family was designed specifically for high-reliability, high-speed galvanic isolation in safety-critical systems-replacing optocouplers with CMOS-based RF isolation that delivers superior timing, longevity, and noise immunity.
FAQ
What is the fail-safe behavior of SI8660EC-B-IS1R during input-side power loss?
The SI8660EC-B-IS1R is ordered with high-default fail-safe mode (denoted by "EC" in the part number), meaning its outputs remain logic high when VDD1 is unpowered but VDD2 remains active. This behavior is implemented via internal pull-up resistors on the output side and is guaranteed across –40 °C to +125 °C. SI8660EC-B-IS1R ensures deterministic safe-state signaling in battery management and motor control systems during brownout conditions.
Does SI8660EC-B-IS1R require external components for basic operation?
Yes-SI8660EC-B-IS1R requires a 0.1 µF ceramic bypass capacitor between each VDD pin (pins 15 and 16) and its respective ground (pins 7 and 14). No pull-up/pull-down resistors are needed on inputs or outputs due to integrated Schmitt triggers and fail-safe configuration. External series termination (50 Ω) is recommended only for >50 Mbps signals routed on controlled-impedance traces to suppress reflections.
What certifications apply to SI8660EC-B-IS1R?
SI8660EC-B-IS1R carries UL 1577 (5000 VRMS for 1 minute), VDE 0884-10 (reinforced insulation), CSA Component Acceptance Notice 5A, and CQC GB4943.1 certification. It meets IEC 60950-1, IEC 62368-1, and IEC 60601-1 for reinforced insulation. The "-IS1" suffix confirms narrow-body SOIC-16 packaging compliant with these standards' creepage and clearance requirements.
Can SI8660EC-B-IS1R operate with mixed supply voltages (e.g., 3.3 V on VDD1 and 5 V on VDD2)?
Yes-SI8660EC-B-IS1R supports independent 2.5–5.5 V supplies on each side. Electrical specifications are validated at both 3.3 V ±10% and 5 V ±10%, including propagation delay (8.0 ns typ), CMTI (50 kV/µs), and supply current (e.g., 3.5 mA per channel at 1 Mbps / 3.3 V). Mixed-voltage operation is fully supported and commonly used to interface 3.3 V MCUs with 5 V peripheral drivers.
How does SI8660EC-B-IS1R compare to optocouplers in terms of lifetime and temperature stability?
SI8660EC-B-IS1R offers a 60-year lifetime at rated working voltage and stable propagation delay (<±0.5 ns variation) across –40 °C to +125 °C-unlike optocouplers, which suffer from LED degradation and wide temperature-dependent timing drift. Its RF-based isolation eliminates aging mechanisms, ensuring consistent 150 Mbps performance and 10 ns timing accuracy over full life and temperature range-validated per AEC-Q100 Grade 1.
SI8660EC-B-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:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8660EC-B-IS1R FAQ
1.How can I place an order for SI8660EC-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8660EC-B-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 SI8660EC-B-IS1R reliable?
The price and inventory of SI8660EC-B-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8660EC-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8660EC-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8660EC-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8660EC-B-IS1R?
SI8660EC-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8660EC-B-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 SI8660EC-B-IS1R?
For technical support, including SI8660EC-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8660EC-B-IS1R requirements.
6.How does Aetrix verify that SI8660EC-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8660EC-B-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 SI8660EC-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8660EC-B-IS1R?
All SI8660EC-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8660EC-B-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 SI8660EC-B-IS1R part is unused and in its original packaging.
Return procedure for SI8660EC-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8660EC-B-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
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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