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Skyworks Solutions Inc. SI8660EC-AS1R
- Part No.:
- SI8660EC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8660EC-AS1R.pdf
- Description:
- AUTOMOTIVE 3.75 KV 6-CHANNEL DIG
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
SI8660EC-AS1R from Skyworks is a six-channel, ultra-low-power digital isolator with 3.75 kVRMS reinforced isolation, 150 Mbps data rate, and selectable high-fail-safe output mode. It features Schmitt-trigger inputs, 2.5–5.5 V dual-supply operation, and operates across –40 to 125 °C for use in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8660EC-AS1R datasheet, SI8660EC-AS1R pinout, SI8660EC-AS1R application, or SI8660EC-AS1R equivalent, this page delivers verified specifications, fail-safe behavior details, CMTI performance (50 kV/µs), timing skew (≤2.5 ns), and automotive-grade qualification (AEC-Q100) - all critical for high-reliability isolated power and EV subsystem design.
Technical Context
The SI8660EC-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 VDD1/VDD2 supplies (2.5–5.5 V), undervoltage lockout (UVLO+ = 2.24 V typ), and failsafe default-high output during input-side power loss.
All six channels are unidirectional from Side A (VDD1) to Side B (VDD2), with Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ) and 50 Ω nominal output impedance. Propagation delay is 8.0 ns typ (max 13 ns), pulse width distortion ≤4.5 ns, and channel-to-channel skew ≤2.5 ns - enabling precise timing in multi-phase inverter control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports high-speed SPI, UART, and PWM feedback in real-time motor control systems. |
| Isolation Rating | 3.75 kVRMS - certified per UL 1577, VDE 0884-10, and IEC 62368-1 for reinforced insulation in industrial and automotive applications. |
| Propagation Delay | 8.0 ns typical (max 13 ns) - enables sub-10 ns timing-critical gate drive synchronization across multiple power stages. |
| Channel-Channel Skew | ≤2.5 ns - ensures matched timing across all six isolated signals for balanced three-phase inverter commutation. |
| CMTI | 50 kV/µs minimum - maintains signal integrity during fast-switching transients in SiC/GaN-based inverters and DC-DC converters. |
| Supply Voltage Range | 2.5–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without level-shifting. |
| Fail-Safe Mode | Default High (Ex suffix) - outputs remain logic high during VDD1 loss, ensuring safe shutdown of downstream power stages. |
Pinout & Package
Narrow-body SOIC-16 package (NB SOIC-16), RoHS-compliant, 260 °C peak reflow, 8.0 mm × 10.0 mm footprint with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDD1 Power Supply | Input-side supply pins - must be bypassed with 0.1 µF capacitor each to GND1 for stable high-speed operation. |
| 7, 14 | GND1 | Input-side ground reference - separate from GND2 to maintain galvanic isolation integrity. |
| 8, 9, 10, 11, 12, 13 | A1–A6 Inputs | Unidirectional input channels from Side A - Schmitt-trigger inputs tolerate slow edges and reject >0.44 V hysteresis noise. |
| 15, 16 | GND2 | Output-side ground reference - electrically isolated from GND1; required for proper output driver biasing. |
| 17, 18, 19, 20, 21, 22 | B1–B6 Outputs | Isolated output channels to Side B - 50 Ω output impedance enables controlled-impedance PCB routing at 150 Mbps. |
Key Features
| Feature | Design Value |
|---|---|
| RF-Based Isolation Architecture | Eliminates LED aging and temperature drift; provides stable propagation delay (<13 ns) over –40 to 125 °C lifetime. |
| Selectably High Fail-Safe Output | Ensures B1–B6 remain logic high during VDD1 brownout - critical for safe gate driver disable in traction inverters. |
| Ultra-Low Power at 100 Mbps | 5.5 mA per channel @ 5 V / 100 Mbps - reduces thermal load in densely packed BMS and OBC modules. |
| Automotive Qualification | AEC-Q100 Grade 1 qualified, AIAG-compliant PPAP support, IMDS/CAMDS listed - meets OEM requirements for EV systems. |
| High CMTI Immunity | 50 kV/µs common-mode transient immunity - prevents false triggering during 100+ V/ns switching events in SiC inverters. |
Applications
| Motor Control Gate Driver Interface | Battery Management System (BMS) Signal Isolation |
|---|---|
Use Scenario: Isolating PWM and fault signals between MCU and 3-phase IGBT/SiC gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator transmitting gate enable, dead-time control, and DESAT feedback with <2.5 ns skew. Use Value: Enables synchronized switching of high-side and low-side devices while maintaining 3.75 kVRMS working voltage clearance per IEC 62368-1. |
Use Scenario: Isolating cell voltage monitoring, temperature sensor, and pack contactor control signals in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Provides reinforced isolation between low-voltage MCU domain and high-voltage battery domain with fail-safe high outputs. Use Value: Guarantees safe open-circuit state on contactor drivers during MCU power loss, preventing unintended pack energization. |
| On-Board Charger (OBC) Feedback Loop | Industrial Isolated ADC/DAC Interface |
Use Scenario: Transmitting isolated current/voltage sensing data and control commands between primary and secondary sides of bidirectional OBCs. IC Role / Device Role / Timing Role: Six-channel isolator handling analog feedback (via sigma-delta modulators) and digital control signals at up to 150 Mbps. Use Value: Supports high-resolution, low-latency closed-loop regulation with 8 ns typical propagation delay and 350 ps eye jitter. |
Use Scenario: Isolating serial interface lines (e.g., SPI) between microcontroller and isolated ADC/DAC in programmable logic controllers and servo drives. IC Role / Device Role / Timing Role: Unidirectional isolator for clock, data, and chip-select signals with Schmitt-trigger inputs rejecting EMI in factory-floor environments. Use Value: Maintains signal integrity at 150 Mbps despite 50 kV/µs transients from nearby VFDs and welding equipment. |
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, 150 Mbps, 3.75 kV RMS, but uses iCoupler magnetic isolation; higher 10.5 mA/channel @ 100 Mbps; no AEC-Q100 grade available. | Not qualified for automotive traction systems; suitable for industrial PLCs where magnetic coupling suffices. | Choose ADUM6601ARWZ only if magnetic isolation is preferred and AEC-Q100 compliance is not required. |
| ISO6760FDWR | 6-channel, 50 Mbps max, 5 kV RMS, capacitive isolation; lower power (1.8 mA/channel @ 1 Mbps); AEC-Q100 Grade 1 qualified. | Limited to medium-speed BMS monitoring and non-timing-critical control; insufficient for 150 Mbps SPI or PWM feedback. | Choose ISO6760FDWR when 5 kV isolation is mandatory and data rate ≤50 Mbps suffices for cost-sensitive automotive modules. |
Compared with ADUM6601ARWZ and ISO6760FDWR, SI8660EC-AS1R uniquely combines 150 Mbps speed, 3.75 kV reinforced isolation, AEC-Q100 Grade 1 qualification, and fail-safe high outputs - making it the only option for timing-critical, automotive-grade isolated gate driving and OBC control loops.
Availability
SI8660EC-AS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8660EC-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 semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The Si866x family was designed specifically for high-reliability, high-speed signal isolation in automotive electrification and industrial power conversion - emphasizing low skew, fail-safe operation, and regulatory-certified reinforced insulation.
FAQ
What is the isolation rating and safety certification status of the SI8660EC-AS1R?
The SI8660EC-AS1R provides 3.75 kVRMS reinforced isolation and is certified to UL 1577, VDE 0884-10, CSA Component Notice 5A, and IEC 62368-1. These approvals validate its use in safety-critical automotive and industrial systems where galvanic separation must withstand sustained high voltages and transient surges.
Does the SI8660EC-AS1R require external startup initialization or configuration?
No, the SI8660EC-AS1R requires no startup initialization. It begins passing data within 40 µs of VDD1/VDD2 reaching UVLO thresholds (2.24 V typ), with outputs following inputs immediately after power-up - a direct result of its RF-modulation architecture that eliminates boot ROM or calibration sequences.
How does the fail-safe high output mode function in the SI8660EC-AS1R during power loss?
In the SI8660EC-AS1R, the "E" suffix denotes default-high fail-safe mode: when VDD1 is unpowered but VDD2 remains active, all six B1–B6 outputs are pulled high via internal circuitry. This ensures downstream gate drivers or contactors enter a known safe state without external pull-ups or supervision circuits.
What is the maximum achievable data rate and timing precision of the SI8660EC-AS1R?
The SI8660EC-AS1R supports up to 150 Mbps with 8.0 ns typical propagation delay, ≤4.5 ns pulse width distortion, and ≤2.5 ns channel-to-channel skew. These values are guaranteed across –40 to 125 °C and enable deterministic timing in high-frequency motor control and digital power feedback loops.
Is the SI8660EC-AS1R qualified for automotive applications, and what documentation is available?
Yes, the SI8660EC-AS1R is AEC-Q100 Grade 1 qualified and supported with AIAG-compliant PPAP documentation, IMDS and CAMDS material declarations, and full automotive process flow validation - confirming its suitability for battery management, traction inverters, and on-board chargers in EV platforms.
SI8660EC-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:
- General Purpose
- Isolated Power:
- Yes
- 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:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8660EC-AS1R FAQ
1.How can I place an order for SI8660EC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8660EC-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 SI8660EC-AS1R reliable?
The price and inventory of SI8660EC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8660EC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8660EC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8660EC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8660EC-AS1R?
SI8660EC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8660EC-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 SI8660EC-AS1R?
For technical support, including SI8660EC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8660EC-AS1R requirements.
6.How does Aetrix verify that SI8660EC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8660EC-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 SI8660EC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8660EC-AS1R?
All SI8660EC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8660EC-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 SI8660EC-AS1R part is unused and in its original packaging.
Return procedure for SI8660EC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8660EC-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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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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