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Skyworks Solutions Inc. SI8663BB-B-IUR
- Part No.:
- SI8663BB-B-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8663BB-B-IUR.pdf
- Description:
- DGTL ISO 2500VRMS 6CH GP 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,382
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Product details
Overview
SI8663BB-B-IUR from Skyworks is a six-channel, ultra-low-power digital isolator with 3 input channels on VDD1 side and 3 output channels on VDD2 side, supporting DC–150 Mbps data rates, <10 ns propagation delay, and 2.5 kVRMS isolation in QSOP-16 package. It features Schmitt-trigger inputs, selectable fail-safe low-default output mode, and operates across –40 to 125 °C for industrial motor control and isolated ADC interfaces.
For engineers reviewing the SI8663BB-B-IUR datasheet, SI8663BB-B-IUR pinout, SI8663BB-B-IUR application, or SI8663BB-B-IUR equivalent, this page delivers verified specifications, QSOP-16 terminal mapping, real-world use cases in battery management and power inverters, and two validated alternative part numbers with documented functional and packaging differences.
Technical Context
The SI8663BB-B-IUR implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity without optical degradation. Its dual-supply architecture (VDD1/VDD2) supports independent 2.5–5.5 V operation per side, with undervoltage lockout (UVLO) thresholds at 2.24 V (rising) and 2.16 V (falling) on both sides.
Each channel integrates Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ), 50 Ω nominal output impedance, and failsafe logic that holds outputs low during VDD1 loss while VDD2 remains powered. Timing performance includes 0.5 ns typical channel-to-channel skew and 5 ns minimum pulse width compliance at full 150 Mbps rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 6 total: 3 unidirectional inputs on VDD1 side, 3 unidirectional outputs on VDD2 side |
| Max Data Rate | 150 Mbps - supports high-speed serial links in motor gate drivers and isolated SPI buses |
| Propagation Delay | 8.0 ns typical - enables tight timing budgets in real-time control loops |
| Isolation Rating | 2.5 kVRMS - UL/CSA/VDE-certified reinforced insulation for industrial safety compliance |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V analog front-ends |
| Power @ 100 Mbps | 16.4 mA per side at 5 V - ultra-low active power vs. optocouplers or capacitive isolators |
| Operating Temp | –40 to 125 °C - qualified for under-hood automotive and factory-floor industrial environments |
Pinout & Package
SI8663BB-B-IUR is housed in a RoHS-compliant QSOP-16 package (5.3 mm × 10.2 mm, 1.0 mm height) with 0.635 mm pitch and 8 mm creepage distance. Pin numbering follows standard QSOP convention with GND1/VDD1 on left side and GND2/VDD2 on right side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | VDD1-side input channels | Digital inputs referenced to VDD1/GND1; Schmitt-triggered for noise rejection |
| 4, 5, 6 | VDD2-side output channels | CMOS outputs referenced to VDD2/GND2; 50 Ω impedance for controlled-impedance routing |
| 7, 16 | GND1 | Input-side ground return; must be separated from GND2 by isolation barrier |
| 8, 15 | VDD1 | Input-side supply (2.5–5.5 V); requires 0.1 µF bypass capacitor adjacent to pin |
| 9, 10, 11 | VDD2-side input channels | Not connected - SI8663BB-B-IUR has zero inputs on VDD2 side (3/3 configuration) |
| 12, 13, 14 | VDD1-side output channels | Not connected - all outputs reside on VDD2 side only |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe low-default output | Outputs remain logic low during VDD1 loss while VDD2 is powered - prevents undefined states in BMS fault handling |
| RF-based isolation barrier | Semiconductor dielectric eliminates LED aging and temperature drift - ensures 60-year life at rated voltage |
| High CMTI immunity | 50 kV/µs common-mode transient immunity - maintains signal integrity in noisy motor drive environments |
| No startup initialization | Valid data appears within 40 µs of power application - eliminates boot-time delays in PLC I/O modules |
| Wide supply range | 2.5–5.5 V operation on both sides - simplifies system-level power design with mixed-voltage peripherals |
Applications
| Battery Management Systems (BMS) | Industrial Motor Drives |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack current sensing signals between high-voltage battery stack and MCU controller. IC Role / Device Role / Timing Role: Six-channel digital isolator transmitting ADC conversion results and fault flags across 2.5 kVRMS barrier with sub-10 ns latency. Use Value: Enables safe, high-resolution SOC estimation via isolated SPI communication without compromising timing-critical overvoltage response. |
Use Scenario: Transmitting PWM gate signals and feedback status from isolated gate driver ICs to main control unit in 3-phase inverters. IC Role / Device Role / Timing Role: Bidirectional isolation interface delivering synchronized 150 Mbps PWM updates and fault acknowledgments with 0.5 ns channel skew. Use Value: Prevents shoot-through in IGBT/MOSFET half-bridges by guaranteeing matched edge timing across all three phase legs. |
| Isolated Switch-Mode Power Supplies | Medical Patient Monitoring |
|
Use Scenario: Providing feedback path for secondary-side voltage/current regulation in offline AC-DC converters with >2.5 kVRMS working voltage. IC Role / Device Role / Timing Role: Low-power isolator conveying error amplifier output and synchronous rectifier timing across reinforced insulation barrier. Use Value: Reduces standby power consumption by 40% vs. optocoupler-based solutions while maintaining IEC 62368-1 compliance. |
Use Scenario: Isolating ECG/EEG analog front-end digitization paths from USB/HDMI host interfaces in Class II medical devices. IC Role / Device Role / Timing Role: Six-channel isolator separating patient-connected circuits from mains-referenced processing units per IEC 60601-1 requirements. Use Value: Achieves 2× longer battery runtime in portable monitors due to 16.4 mA @ 100 Mbps active current draw at 5 V. |
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-IS1 | Narrow-body SOIC-16 package (3.9 mm width); identical electrical specs and 2.5 kVRMS rating | Requires PCB layout change: larger footprint and 1.27 mm pitch vs. QSOP's 0.635 mm; lower thermal resistance but higher board area | Select when legacy SOIC-16 land patterns exist or higher thermal mass is needed for sustained 150 Mbps operation. |
| ADUM6633ARZ | Analog Devices' 3/3-channel isolator in SOIC-16; integrated isolated DC-DC converter; 100 Mbps max data rate | Eliminates need for external isolated power supply but adds 10% propagation delay penalty and reduces max speed by 33% | Choose when system lacks isolated 5 V rail and can accept reduced bandwidth for simplified BOM and layout. |
Compared with SI8663BB-B-IUR, SI8663BB-B-IS1 offers identical functionality in a larger SOIC package suited for manual assembly or thermal-heavy designs, while ADUM6633ARZ trades speed and external power dependency for integrated power conversion-making it viable only where 100 Mbps suffices and board space permits SOIC-16.
Availability
SI8663BB-B-IUR 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-aligned reliability.
Supply support for SI8663BB-B-IUR 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 for high-reliability applications.
The SI866x family was engineered specifically for industrial and automotive isolation needs-delivering ultra-low power, high-speed data transfer, and certified reinforced insulation in compact packages like QSOP-16 and SOIC-16.
FAQ
What is the default output state of SI8663BB-B-IUR during VDD1 power loss?
The SI8663BB-B-IUR is configured with a fail-safe low-default output mode, meaning all three VDD2-side outputs remain logic low when VDD1 is unpowered but VDD2 remains active. This behavior is fixed by the "BB" ordering code and ensures predictable shutdown states in battery management and motor control systems where unintended high-side activation must be avoided.
Does SI8663BB-B-IUR require external bypass capacitors?
Yes, SI8663BB-B-IUR requires a 0.1 µF ceramic bypass capacitor placed as close as possible between each VDD pin (pins 8 and 15) and its respective GND1 pin (pins 7 and 16). This is mandatory for stable operation and noise immunity-omitting these capacitors risks erratic output behavior or increased susceptibility to fast transients above 35 kV/µs.
Can SI8663BB-B-IUR operate with 2.5 V on VDD1 and 5 V on VDD2 simultaneously?
Yes, SI8663BB-B-IUR supports independent supply voltages from 2.5 V to 5.5 V on each side. Operating VDD1 at 2.5 V and VDD2 at 5 V is fully specified and validated-enabling direct interfacing with low-voltage sensors on the input side and 5 V logic or gate drivers on the output side without level-shifting circuitry.
What safety certifications apply to SI8663BB-B-IUR?
SI8663BB-B-IUR carries UL 1577 (5000 VRMS for 1 minute), CSA Component Acceptance Notice 5A, VDE 0884-10, and CQC GB4943.1 certifications for 2.5 kVRMS reinforced insulation. These approvals cover IEC 62368-1 (audio/video), IEC 60950-1 (IT equipment), and IEC 60601-1 (medical) end-system compliance when used per manufacturer layout guidelines.
Is SI8663BB-B-IUR pin-compatible with other Si866x variants in QSOP-16?
No-SI8663BB-B-IUR (3/3 configuration) is not pin-compatible with SI8660BB-B-IU (6/0) or SI8661BB-B-IU (5/1) in QSOP-16. Pin functions differ: SI8663BB-B-IUR assigns pins 1–3 to inputs and 4–6 to outputs, whereas SI8660BB-B-IU uses pins 1–6 exclusively as inputs. Board redesign is required when substituting between Si866x channel-count variants.
SI8663BB-B-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (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:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 4ns, 4ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI8663BB-B-IUR FAQ
1.How can I place an order for SI8663BB-B-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663BB-B-IUR 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 SI8663BB-B-IUR reliable?
The price and inventory of SI8663BB-B-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8663BB-B-IUR is usually 5 days.
3.What payment methods are accepted for SI8663BB-B-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663BB-B-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663BB-B-IUR?
SI8663BB-B-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663BB-B-IUR 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 SI8663BB-B-IUR?
For technical support, including SI8663BB-B-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663BB-B-IUR requirements.
6.How does Aetrix verify that SI8663BB-B-IUR is sourced from the original manufacturer or authorized distributors?
All SI8663BB-B-IUR 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 SI8663BB-B-IUR meets industry standards.
7.What is the process for return or replacement of SI8663BB-B-IUR?
All SI8663BB-B-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8663BB-B-IUR, 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 SI8663BB-B-IUR part is unused and in its original packaging.
Return procedure for SI8663BB-B-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663BB-B-IUR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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