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Skyworks Solutions Inc. SI8663BB-AU
- Part No.:
- SI8663BB-AU
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8663BB-AU.pdf
- Description:
- AUTOMOTIVE 2.5 KV 3 FORWARD & 3
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
SI8663BB-AU from Skyworks is a six-channel automotive-grade digital isolator with 3 input channels on VDD1 side and 3 output channels on VDD2 side, supporting up to 150 Mbps data rate, <10 ns propagation delay, and 2.5 kVRMS isolation. It features Schmitt trigger inputs, selectable fail-safe low-default output mode, and operates across –40 to 125 °C for battery management systems and traction inverters.
For engineers reviewing the SI8663BB-AU datasheet, SI8663BB-AU pinout, SI8663BB-AU application, or SI8663BB-AU equivalent, this page delivers verified electrical specs, QSOP-16 package details, fail-safe behavior under undervoltage, and automotive-qualified timing performance for high-reliability isolated signal transfer.
Technical Context
The SI8663BB-AU implements RF-based on/off keying across a semiconductor isolation barrier-no startup initialization required. Its dual-supply architecture (VDD1/VDD2) enables galvanic separation between controller and power stage domains, with independent UVLO monitoring per side.
Each channel uses Schmitt-trigger inputs for >0.4 V hysteresis and delivers 50 Ω nominal output impedance. The device achieves 0.5 ns typical channel-to-channel skew and 50 kV/µs common-mode transient immunity-critical for motor control gate drivers and isolated ADC interfaces in noisy EV powertrains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports real-time PWM feedback and high-speed serial communication in OBC and BMS. |
| Propagation Delay | 5–13 ns - ensures tight timing alignment between isolated control and sensing paths in traction inverters. |
| Channel Configuration | 3 inputs / 3 outputs - matches bidirectional signal requirements in isolated half-bridge gate driver interfaces. |
| Isolation Rating | 2.5 kVRMS - certified to UL, VDE, CSA, and CQC standards for reinforced insulation in automotive applications. |
| Supply Voltage Range | 2.5–5.5 V - compatible with both 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Fail-Safe Default | Low output during VDD1 loss - prevents unintended gate turn-on in power stage control circuits. |
| Operating Temperature | –40 to 125 °C - qualified per AEC-Q100 Grade 1 for under-hood and battery-pack environments. |
Pinout & Package
SI8663BB-AU is housed in a RoHS-compliant QSOP-16 package (5.3 mm × 10.2 mm, 1.0 mm height), optimized for high-density automotive PCB layouts with 0.65 mm lead pitch and 8 mm creepage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDD1-side I/O (3 inputs) | Pins 1–3 are inputs; pins 4–6 are unused on SI8663BB-AU - configured as 3-channel input side per ordering guide. |
| 7, 8, 9, 10, 11, 12 | VDD2-side I/O (3 outputs) | Pins 7–9 are outputs; pins 10–12 are unused - matches 3-output configuration with fail-safe low default. |
| 13, 16 | VDD1, VDD2 | Separate 2.5–5.5 V supplies for isolated domains; each requires local 0.1 µF bypass capacitor. |
| 14, 15 | GND1, GND2 | Independent ground references - must not be shorted; define isolation barrier between domains. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates startup initialization and provides superior magnetic field immunity vs. optocouplers or capacitive isolators. |
| Selectably fail-safe output | Low-default state during VDD1 loss prevents hazardous gate drive activation in power converter fault conditions. |
| Ultra-low power at 100 Mbps | 16.4 mA per supply at 5 V - reduces thermal load in sealed battery enclosures and simplifies heatsinking. |
| High CMTI | 50 kV/µs - maintains signal integrity during fast-switching transients in SiC/GaN inverter stages. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with zero-defect manufacturing flow, PPAP documentation, and IMDS/CAMDS compliance. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack-level communication between high-voltage battery stack and MCU. IC Role / Device Role / Timing Role: Six-channel isolator transfers analog front-end ADC data and safety signals across 400–800 V barriers with sub-10 ns timing fidelity. Use Value: Enables precise SOC/SOH estimation via synchronized, noise-immune sampling - critical for ISO 26262 ASIL-C compliance. |
Use Scenario: Transmitting PWM and fault signals between inverter MCU and isolated gate drivers in 800 V electric drivetrains. IC Role / Device Role / Timing Role: SI8663BB-AU provides matched 3-input/3-output paths for three-phase gate drive with <0.5 ns skew. Use Value: Prevents shoot-through by ensuring simultaneous, jitter-free switching of high-side and low-side IGBTs/SiC FETs. |
| On-Board Charger (OBC) | Charging Station Interface |
|
Use Scenario: Isolating digital control signals between AC/DC and DC/DC stages in bidirectional OBC topologies. IC Role / Device Role / Timing Role: SI8663BB-AU bridges isolated control domains while maintaining 150 Mbps throughput for fast loop updates. Use Value: Supports adaptive charging protocols (e.g., GB/T, CHAdeMO) with deterministic latency under EMI-heavy conditions. |
Use Scenario: Securing communication between grid-side controller and isolated DC bus monitoring in liquid-cooled charging cabinets. IC Role / Device Role / Timing Role: Provides reinforced 2.5 kVRMS isolation for CAN FD and status reporting lines exposed to mains transients. Use Value: Meets IEC 62368-1 and UL 60950-1 reinforced insulation requirements without external protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8663BB-IS1 | Industrial-grade, same pinout and electrical specs, but rated for 1 kVRMS isolation and –40 to 125 °C without AEC-Q100 validation. | Lacks PPAP, IMDS, and automotive process controls - suitable for non-safety-critical industrial inverters only. | Choose SI8663BB-IS1 only if automotive qualification and reinforced insulation are not required. |
| ADUM6633ARWZ | 6-channel isolator with integrated 500 mW isolated DC/DC converter; 2.5 kVRMS rating; 150 Mbps; SOIC-16W package. | Provides isolated power - eliminates need for external isolated supply, but larger footprint and higher quiescent current. | Prefer ADUM6633ARWZ when board space allows and isolated bias is unavailable; SI8663BB-AU saves cost and layout area where external supply exists. |
Compared with SI8663BB-IS1, the SI8663BB-AU adds AEC-Q100 qualification, AIAG-compliant PPAP, and full automotive process controls - essential for OEM BMS and inverter programs. Against ADUM6633ARWZ, it trades integrated power for smaller QSOP-16 size and lower system-level BOM count when auxiliary isolated rails are already present.
Availability
SI8663BB-AU 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 SI8663BB-AU 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 solutions for wireless, automotive, and industrial markets.
The Si866x family was designed specifically for automotive and industrial isolation needs - delivering ultra-low-power, high-speed, and AEC-Q100-qualified digital isolation in compact packages.
FAQ
What is the default output state of SI8663BB-AU during VDD1 undervoltage?
The SI8663BB-AU is ordered with "BB" suffix, indicating a low-default fail-safe mode. When VDD1 drops below UVLO threshold (1.88–2.325 V), outputs on VDD2 side hold low until VDD1 recovers - preventing unsafe activation of downstream power devices. This behavior is confirmed in Table 3.1 and Ordering Guide for SI8663BB-AU.
Does SI8663BB-AU require external bypass capacitors?
Yes - SI8663BB-AU requires a 0.1 µF ceramic capacitor placed as close as possible between each VDD pin (pins 13 and 16) and its respective ground (pins 14 and 15). This is mandatory per Section 3.3.1 and ensures stable operation across temperature and data rates up to 150 Mbps.
Is SI8663BB-AU pin-compatible with other Si866x variants in QSOP-16?
Yes - all Si866x devices in QSOP-16 (e.g., SI8660BB-AU, SI8661BB-AU, SI8662BB-AU, SI8663BB-AU) share identical pinouts and footprints. Channel count differences are implemented internally; no PCB redesign is needed when migrating within the family for functional reconfiguration.
What safety certifications apply to SI8663BB-AU?
SI8663BB-AU holds UL 1577 (5000 VRMS/1 min), VDE 0884-10, CSA Component Notice 5A, and CQC GB4943.1 certifications for 2.5 kVRMS working voltage. It meets IEC 62368-1 and IEC 60601-1 reinforced insulation requirements - validated for automotive use per AEC-Q100 Grade 1.
Can SI8663BB-AU operate with mixed supply voltages (e.g., 3.3 V on VDD1 and 5 V on VDD2)?
Yes - SI8663BB-AU supports independent 2.5–5.5 V supplies on VDD1 and VDD2. Electrical Characteristics tables (Sections 4.2 and 4.3) confirm valid operation at 3.3 V/5 V, 5 V/3.3 V, and other combinations, enabling interoperability between 3.3 V MCUs and 5 V gate drivers without level shifters.
SI8663BB-AU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 3/3
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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-QSOP
SI8663BB-AU FAQ
1.How can I place an order for SI8663BB-AU through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663BB-AU 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-AU reliable?
The price and inventory of SI8663BB-AU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8663BB-AU is usually 5 days.
3.What payment methods are accepted for SI8663BB-AU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663BB-AU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663BB-AU?
SI8663BB-AU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663BB-AU 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-AU?
For technical support, including SI8663BB-AU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663BB-AU requirements.
6.How does Aetrix verify that SI8663BB-AU is sourced from the original manufacturer or authorized distributors?
All SI8663BB-AU 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-AU meets industry standards.
7.What is the process for return or replacement of SI8663BB-AU?
All SI8663BB-AU units undergo pre-shipment inspection (PSI). If there is an issue with SI8663BB-AU, 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-AU part is unused and in its original packaging.
Return procedure for SI8663BB-AU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663BB-AU 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.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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