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Skyworks Solutions Inc. SI8663BC-B-IS1R
- Part No.:
- SI8663BC-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8663BC-B-IS1R.pdf
- Description:
- DGTL ISO 3750VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,665
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Product details
Overview
SI8663BC-B-IS1R from Skyworks is a six-channel digital isolator with 3 input channels on VDD1 side and 3 on VDD2 side, 3.75 kVRMS isolation rating, 150 Mbps data rate, and fail-safe default-low output mode. It operates from 2.5–5.5 V supplies across –40 to 125 °C and is used in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8663BC-B-IS1R datasheet, SI8663BC-B-IS1R pinout, SI8663BC-B-IS1R application, or SI8663BC-B-IS1R equivalent, this page delivers verified specifications, SOIC-16 narrow-body package details, fail-safe behavior under undervoltage, and direct alternatives for industrial and automotive isolation design.
Technical Context
The SI8663BC-B-IS1R implements RF-based on/off keying across a semiconductor isolation barrier-no startup initialization required. Its dual-supply architecture supports independent 2.5–5.5 V operation on each side, with Schmitt-trigger inputs ensuring noise immunity up to 50 kV/µs CMTI.
Each of its six bidirectional-capable channels features <5 ns pulse width distortion, <2.5 ns channel-to-channel skew, and precise propagation delay matching (typ. 8 ns). The device enters undervoltage lockout below 2.16 V and exits above 2.24 V, with 70 mV hysteresis per supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 6-channel, 3-input/3-output split across isolation barrier - enables asymmetric I/O partitioning for gate driver feedback and status monitoring |
| Isolation Rating | 3.75 kVRMS (1 min) - certified to UL 1577, VDE 0884-10, CSA 5A, and CQC GB4943.1 for reinforced insulation |
| Data Rate | DC to 150 Mbps - supports high-speed serial communication in motor control PWM feedback loops |
| Propagation Delay | 5–13 ns (max), typ. 8 ns - ensures tight timing alignment between isolated control and sensing paths |
| Supply Voltage | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends |
| Fail-Safe Mode | Default-low output during VDD1 loss - prevents unintended activation of downstream power stages |
| Operating Temp | –40 to 125 °C - qualified per AEC-Q100 Grade 1 for automotive BMS and OBC applications |
Pinout & Package
SI8663BC-B-IS1R uses a RoHS-compliant 16-pin narrow-body SOIC package (5.3 mm width, 10.3 mm length) with 8.3 mm creepage and 8.0 mm clearance - compliant with IEC 60601-1 and IEC 62368-1 reinforced insulation requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry for channels A1–A3; bypass with 0.1 µF capacitor |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8 mm PCB creepage |
| INA1–INA3 | Input signals to VDD1 side | Schmitt-trigger inputs with 0.44 V hysteresis - reject fast transients up to 50 kV/µs |
| VDD2 | Output-side power supply | Supplies receiver and output driver circuitry for channels B1–B3 |
| GND2 | Output-side ground reference | Isolated return for VDD2; forms safety barrier with GND1 |
| OUTB1–OUTB3 | Isolated output signals | CMOS outputs with 50 Ω nominal impedance - match to 50 Ω traces for >50 Mbps operation |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift issues of optocouplers; no calibration or initialization needed at power-up |
| Fail-safe default-low | Guarantees low output state when VDD1 is unpowered - critical for safe shutdown in motor drive fault conditions |
| Low power at 100 Mbps | 16.4 mA per side at 5 V (typ.), enabling thermal efficiency in dense BMS modules without forced air cooling |
| High CMTI | 50 kV/µs common-mode transient immunity - maintains signal integrity in noisy inverter switching environments |
| Automotive qualification | AEC-Q100 Grade 1 rated - validated for use in on-board chargers and traction inverters with zero-defect manufacturing flow |
Applications
| Motor Control Gate Driver Interface | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase IGBT/SiC gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Six-channel isolator providing three forward PWM paths and three reverse fault/status channels across reinforced barrier. Use Value: Enables compact, thermally efficient layout with <2.5 ns channel skew - preserves dead-time integrity and prevents shoot-through. |
Use Scenario: Signal isolation between cell monitor ICs (e.g., LTC6813) and host MCU in high-voltage battery packs (up to 1000 V). IC Role / Device Role / Timing Role: Bidirectional-capable isolator transmitting voltage/temperature readings and balancing commands across isolation boundary. Use Value: 3.75 kVRMS rating and AEC-Q100 qualification ensure long-term reliability in harsh automotive environments. |
| Industrial PLC Digital I/O Module | Isolated Switch-Mode Power Supply |
Use Scenario: Providing galvanic isolation for 24 V DC input/output channels in programmable logic controllers with field-side surge protection. IC Role / Device Role / Timing Role: Replacing multiple optocouplers with single SI8663BC-B-IS1R to reduce BOM count and PCB area. Use Value: 150 Mbps capability supports fast diagnostics and real-time status polling without latency bottlenecks. |
Use Scenario: Isolating feedback signals (voltage, current, temperature) from secondary-side sensing circuits to primary-side PWM controller in AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: High-CMTI isolator maintaining regulation accuracy despite fast dV/dt noise from synchronous rectifiers. Use Value: 50 kV/µs immunity prevents false triggering of overvoltage/overcurrent protection during load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8663BB-B-IS1R | Same 3/3 channel split and SOIC-16 NB package, but 2.5 kVRMS isolation rating instead of 3.75 kVRMS | Approved for lower working voltage systems (<600 V); not suitable for 800 V EV battery domains | Select when end-equipment safety certification requires only 2.5 kVRMS and cost optimization is prioritized |
| ADUM6633ARWZ | Analog Devices' 6-channel isolator with integrated 500 mW isolated DC/DC converter; 3.75 kVRMS rating; higher quiescent current | Eliminates need for external isolated power supply but increases thermal footprint and cost | Choose when board space is constrained and isolated bias is unavailable - accept ~2× higher supply current vs. SI8663BC-B-IS1R |
Compared with SI8663BC-B-IS1R, SI8663BB-B-IS1R offers identical functionality at reduced isolation strength, while ADUM6633ARWZ trades higher power consumption for integrated power conversion - making SI8663BC-B-IS1R optimal for cost-sensitive, thermally constrained designs requiring 3.75 kVRMS compliance.
Availability
SI8663BC-B-IS1R is available at Aetrix Electronics and suitable for industrial automation systems, battery management systems, and isolated switch-mode supplies requiring stable component supply across automotive and industrial lifecycles.
Supply support for SI8663BC-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 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 digital isolation in automotive, industrial, and medical systems - emphasizing low power, precise timing, and robust safety certification.
FAQ
What is the isolation rating and safety certification status of SI8663BC-B-IS1R?
SI8663BC-B-IS1R provides 3.75 kVRMS isolation for 1 minute and is certified to UL 1577, VDE 0884-10 (reinforced), CSA Component Notice 5A, and CQC GB4943.1. These approvals validate its use in medical (IEC 60601-1) and industrial (IEC 62368-1) equipment requiring reinforced insulation.
Does SI8663BC-B-IS1R require external components for stable operation?
Yes - SI8663BC-B-IS1R requires a 0.1 µF ceramic bypass capacitor between VDD1 and GND1, and another between VDD2 and GND2, placed within 3 mm of the respective pins. No pull-up/pull-down resistors are needed due to internal fail-safe termination.
How does the fail-safe mode function in SI8663BC-B-IS1R during power loss?
SI8663BC-B-IS1R is configured as default-low: when VDD1 is unpowered but VDD2 remains active, all output channels (OUTB1–OUTB3) are driven low within 1 µs. This prevents undefined states in downstream logic or gate drivers during brown-out conditions.
What is the maximum achievable data rate and timing precision of SI8663BC-B-IS1R?
SI8663BC-B-IS1R supports up to 150 Mbps with guaranteed minimum pulse width of 5 ns. Its typical propagation delay is 8 ns, pulse width distortion is ≤0.2 ns, and channel-to-channel skew is ≤0.4 ns - enabling sub-10 ns timing-critical feedback in motor control loops.
Is SI8663BC-B-IS1R qualified for automotive applications?
Yes - SI8663BC-B-IS1R is AEC-Q100 Grade 1 qualified (–40 to 125 °C), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings - making it suitable for on-board chargers and battery management systems.
SI8663BC-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:
- 3/3
- 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
SI8663BC-B-IS1R FAQ
1.How can I place an order for SI8663BC-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663BC-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 SI8663BC-B-IS1R reliable?
The price and inventory of SI8663BC-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 SI8663BC-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8663BC-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663BC-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663BC-B-IS1R?
SI8663BC-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663BC-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 SI8663BC-B-IS1R?
For technical support, including SI8663BC-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663BC-B-IS1R requirements.
6.How does Aetrix verify that SI8663BC-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8663BC-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 SI8663BC-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8663BC-B-IS1R?
All SI8663BC-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8663BC-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 SI8663BC-B-IS1R part is unused and in its original packaging.
Return procedure for SI8663BC-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663BC-B-IS1R Tags
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