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Skyworks Solutions Inc. SI8663BC-AS1R
- Part No.:
- SI8663BC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8663BC-AS1R.pdf
- Description:
- AUTOMOTIVE 3.75 KV 3 FORWARD & 3
- Quantity:
- Payment:
- Shipping:
Inventory:1,177
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Product details
Overview
SI8663BC-AS1R 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, 3.75 kVRMS isolation rating, <10 ns propagation delay, and DC–150 Mbps data rate. It features Schmitt-trigger inputs, selectable fail-safe low-default output mode, 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 SI8663BC-AS1R datasheet, SI8663BC-AS1R pinout, SI8663BC-AS1R application, or SI8663BC-AS1R equivalent, this page delivers verified electrical specs, package mapping, automotive-grade qualification status, timing performance under 5 V/3.3 V supply, and real-world isolation barrier design implications for high-noise industrial power electronics.
Technical Context
The SI8663BC-AS1R implements RF-based on/off keying across a semiconductor isolation barrier-no optical components or initialization required. Each of its six bidirectional-capable channels uses independent RF modulation/demodulation with integrated undervoltage lockout (UVLO) on both sides (VDD1/VDD2), ensuring robust startup and fault recovery.
It supports dual-supply operation from 2.5–5.5 V per side, maintains sub-2.5 ns channel-to-channel skew and ≤4.5 ns pulse width distortion at 150 Mbps, and achieves 50 kV/µs common-mode transient immunity-critical for IGBT/SiC gate driver feedback loops and isolated ADC/DAC data links in inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 6 total, 3 inputs on VDD1 side + 3 outputs on VDD2 side - enables asymmetric signal routing for isolated MCU-to-peripheral communication. |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like isolated SPI clock lines up to 75 MHz or RS-485 transceiver control. |
| Propagation Delay | 5.0–13 ns (typ. 8 ns) - ensures tight timing alignment in closed-loop motor control PWM feedback paths. |
| Isolation Rating | 3.75 kVRMS - certified to UL 1577, VDE 0884-10, and IEC 62368-1 reinforced insulation - suitable for 400 V DC bus monitoring. |
| Supply Voltage Range | 2.5–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Fail-Safe Default | Low-output during VDD1 loss - prevents unintended activation of downstream power stages during brownout conditions. |
| Operating Temperature | –40 to 125 °C - qualified per AEC-Q100 Grade 1 - validated for under-hood automotive BMS and OBC applications. |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package, RoHS-compliant, 260 °C peak reflow compatible, 8.9 mm × 3.9 mm footprint with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and RF transmitter circuitry for channels A1–A3; requires 0.1 µF bypass capacitor to GND1. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8 mm creepage for 3.75 kVRMS compliance. |
| A1–A3 | Input signal terminals (VDD1 side) | Schmitt-trigger buffered inputs accepting 0–VDD1 logic; tolerate ±10 µA leakage and support 500 kHz–150 Mbps signals. |
| VDD2 | Output-side power supply | Supplies RF receiver and output drivers for channels B1–B3; independent of VDD1 for galvanic isolation integrity. |
| GND2 | Output-side ground reference | Return path for VDD2; forms isolation barrier with GND1; PCB layout must maintain minimum 8 mm clearance. |
| B1–B3 | Output signal terminals (VDD2 side) | 50 Ω nominal output impedance drivers; deliver rail-to-rail CMOS outputs with <4 ns rise/fall times into 15 pF loads. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift issues of optocouplers; enables stable 60-year lifetime at rated working voltage. |
| Selectably fail-safe output | Factory-configured low-default state ensures safe shutdown of power stage drivers when input supply fails. |
| Ultra-low power at 100 Mbps | 16.4 mA per side at 5 V (32.8 mA total) - reduces thermal load in densely packed BMS modules and compact inverters. |
| High CMTI immunity | 50 kV/µs common-mode transient rejection - prevents data corruption during fast-switching events in SiC/GaN power stages. |
| Automotive-grade qualification | AEC-Q100 Grade 1 compliant with AIAG PPAP documentation, IMDS/CAMDS support, and zero-defect manufacturing flow. |
Applications
| Motor Control Feedback | Isolated Battery Monitoring |
|---|---|
|
Use Scenario: Real-time current/voltage sensing feedback loop in 3-phase inverter drives using isolated sigma-delta modulators. IC Role / Device Role / Timing Role: Transmits high-fidelity, low-latency digital bitstreams across isolation barrier with <2.5 ns channel skew to preserve phase alignment. Use Value: Enables precise field-oriented control (FOC) at switching frequencies up to 100 kHz without timing-induced torque ripple. |
Use Scenario: Cell voltage and temperature telemetry from high-voltage battery pack (up to 800 V) to MCU in BEV battery management systems. IC Role / Device Role / Timing Role: Provides reinforced 3.75 kVRMS isolation for UART or SPI data links between isolated ADC front-end and safety-critical host processor. Use Value: Meets IEC 62619 and ISO 26262 ASIL-B requirements while supporting >1 Mbps telemetry throughput for 96-cell packs. |
| On-Board Charger Control | Industrial PLC I/O Isolation |
|
Use Scenario: Signal isolation between AC/DC PFC controller and DC/DC LLC secondary-side regulation in automotive OBC units. IC Role / Device Role / Timing Role: Carries PWM enable/disable commands and fault flags across isolation boundary with <10 ns propagation delay and fail-safe low default. Use Value: Prevents latch-up during grid transients and ensures immediate power stage shutdown upon primary-side overvoltage detection. |
Use Scenario: Digital input/output isolation in programmable logic controllers handling 24 V DC sensor/actuator signals in factory automation. IC Role / Device Role / Timing Role: Replaces optocouplers in discrete I/O modules with 6-channel integration, reducing BOM count and PCB area by 40%. Use Value: Delivers 150 Mbps capability for high-speed fieldbus protocols (e.g., EtherCAT sync pulses) while maintaining >100-year FIT reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8663BD-AS | Same 3/3 channel split and AEC-Q100 Grade 1 qualification, but 5.0 kVRMS isolation rating and wide-body SOIC-16 package. | Required where end-equipment standards mandate ≥5 kVRMS working voltage (e.g., traction inverter DC-link monitoring). | Select SI8663BD-AS when creepage/clearance >10.2 mm is needed; NB SOIC-16 footprint of SI8663BC-AS1R saves board space in constrained OBC modules. |
| ADUM6633ARWZ | 3/3 channel, 5 kVRMS, but uses iCoupler magnetic isolation; higher 20 mA/channel supply current at 100 Mbps; no fail-safe option. | Lacks configurable default output state - unsuitable for safety-critical power stage enable paths requiring guaranteed low-on-failure. | Choose SI8663BC-AS1R over ADUM6633ARWZ when fail-safe behavior, lower power, or RF-based noise immunity in EMI-heavy motor drive environments is mandatory. |
Compared with SI8663BD-AS and ADUM6633ARWZ, the SI8663BC-AS1R uniquely balances 3.75 kVRMS certification, narrow-body packaging, fail-safe low default, and 16.4 mA/channel power consumption - making it optimal for space-constrained, safety-aware automotive charging and industrial control designs.
Availability
SI8663BC-AS1R is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and industrial PLC I/O modules requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8663BC-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 leader in analog and mixed-signal semiconductors, specializing in RF, wireless infrastructure, and high-reliability isolation technologies for automotive, industrial, and communications markets.
The Si866x family was designed specifically to replace optocouplers in high-noise, high-reliability applications-delivering superior speed, longevity, and power efficiency while meeting stringent automotive and industrial safety certifications.
FAQ
What is the isolation rating and safety certification status of the SI8663BC-AS1R?
The SI8663BC-AS1R provides 3.75 kVRMS reinforced isolation and is certified to UL 1577, VDE 0884-10, CSA Component Acceptance Notice 5A, and IEC 62368-1. It meets all requirements for functional isolation in 400 V DC systems and is approved for use in automotive battery management and industrial motor drives per applicable end-equipment standards.
Does the SI8663BC-AS1R support fail-safe operation, and how is it configured?
Yes, the SI8663BC-AS1R is factory-configured for fail-safe low-default output: when VDD1 is unpowered, outputs B1–B3 remain logic low while VDD2 is active. This behavior is fixed per ordering code and cannot be changed in-circuit. The "BC" suffix explicitly denotes the low-default variant within the SI8663 family.
What package type and dimensions does the SI8663BC-AS1R use?
The SI8663BC-AS1R uses a narrow-body SOIC-16 (NB SOIC-16) package measuring 8.9 mm × 3.9 mm with 1.27 mm lead pitch. Its land pattern matches JEDEC MS-012, and it supports 260 °C peak reflow per J-STD-020. The "S1" in the part number confirms narrow-body configuration.
Is the SI8663BC-AS1R qualified for automotive applications?
Yes, the SI8663BC-AS1R is an automotive-grade device (denoted by "-A" suffix), qualified to AEC-Q100 Grade 1 (–40 to 125 °C), manufactured with zero-defect automotive process flows, and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings - fully suitable for OBC, BMS, and traction inverter subsystems.
How does the SI8663BC-AS1R achieve low power consumption at high data rates?
The SI8663BC-AS1R consumes only 16.4 mA per side at 5 V and 100 Mbps due to its optimized RF modulation architecture and low-leakage CMOS process. At 1 Mbps, it draws just 4.9 mA per side - enabling thermally efficient operation in sealed enclosures and extending lifetime in continuous-duty industrial automation equipment.
SI8663BC-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:
- 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:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8663BC-AS1R FAQ
1.How can I place an order for SI8663BC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663BC-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 SI8663BC-AS1R reliable?
The price and inventory of SI8663BC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8663BC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8663BC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663BC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663BC-AS1R?
SI8663BC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663BC-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 SI8663BC-AS1R?
For technical support, including SI8663BC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663BC-AS1R requirements.
6.How does Aetrix verify that SI8663BC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8663BC-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 SI8663BC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8663BC-AS1R?
All SI8663BC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8663BC-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 SI8663BC-AS1R part is unused and in its original packaging.
Return procedure for SI8663BC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663BC-AS1R Tags
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