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Skyworks Solutions Inc. SI8663AB-AS1
- Part No.:
- SI8663AB-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8663AB-AS1.pdf
- Description:
- AUTOMOTIVE 2.5 KV 3 FORWARD & 3
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
SI8663AB-AS1 from Skyworks is a six-channel automotive-grade digital isolator with 3 input channels on VDD1 side and 3 on VDD2 side, supporting up to 150 Mbps data rate, <10 ns propagation delay, and 2.5 kVRMS isolation rating in narrow-body SOIC-16 package. It operates across –40 to 125 °C and features selectable fail-safe low-default output mode for power-loss scenarios in battery management systems.
For engineers reviewing the SI8663AB-AS1 datasheet, SI8663AB-AS1 pinout, SI8663AB-AS1 application, or SI8663AB-AS1 equivalent, this page delivers verified technical context, precise timing specs, automotive qualification evidence, and real-world isolation design implications - not generic marketing claims.
Technical Context
The SI8663AB-AS1 implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its dual-supply architecture (VDD1/VDD2) supports independent 2.5–5.5 V operation per side with Schmitt-trigger inputs and undervoltage lockout on both domains.
Each of its six bidirectional-capable channels delivers sub-10 ns propagation delay, ≤0.5 ns channel-to-channel skew, and 50 kV/µs common-mode transient immunity. The device uses AEC-Q100 qualified process flows and supports reinforced insulation per IEC 60950-1 and IEC 62368-1 at 2.5 kVRMS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - enables high-speed serial communication in motor control gate drivers and isolated ADC interfaces. |
| Propagation Delay | 5.0–13 ns - ensures tight timing alignment in real-time feedback loops for traction inverters. |
| Channel-Channel Skew | 0.4–2.5 ns - preserves phase coherence across multi-channel isolated sensing in BMS voltage monitoring. |
| Isolation Rating | 2.5 kVRMS - meets reinforced insulation requirements for on-board chargers operating at 400–800 V DC bus. |
| 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 state during VDD1 loss - prevents unintended activation of high-side IGBTs in power inverter stages. |
| Operating Temperature | –40 to 125 °C - validated for under-hood automotive environments including battery electric vehicle powertrain modules. |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package with 8.0 mm creepage/clearance, RoHS-compliant, JEDEC-standard 260 °C peak reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDD1-side I/O channels (3 inputs / 3 outputs) | Side A interface for MCU GPIO, SPI clock/data, or PWM signals requiring galvanic separation from high-voltage domain. |
| 7, 8 | GND1 | Input-side ground reference; must be isolated from GND2 with ≥8 mm PCB spacing per safety standards. |
| 9, 10, 11, 12, 13, 14 | VDD2-side I/O channels (3 inputs / 3 outputs) | Side B interface for gate drivers, current-sense amplifiers, or isolated ADCs in high-noise power stages. |
| 15, 16 | GND2 | Output-side ground reference; forms isolation barrier boundary with GND1 - no shared copper pour allowed. |
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 downstream power stages when input supply fails. |
| Ultra-low power at 100 Mbps | 16.4 mA per side at 5 V - reduces thermal load in compact automotive ECUs with limited heatsinking. |
| Schmitt-trigger inputs | 0.44 V typical hysteresis - rejects >1 V of conducted noise on long traces in motor drive enclosures. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with zero-defect methodology, PPAP documentation, and IMDS/CAMDS compliance. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
Use Scenario: Isolating cell voltage measurement and pack contactor control signals between low-voltage MCU and 400–800 V battery stack. IC Role / Device Role / Timing Role: Six-channel signal isolator providing independent galvanic separation for three voltage sense lines and three digital control outputs. Use Value: Enables accurate ±1 mV cell monitoring while preventing fault propagation from high-voltage domain to MCU via certified 2.5 kVRMS barrier. |
Use Scenario: Isolating AC-DC controller signals and DC-link voltage feedback in bi-directional OBC modules. IC Role / Device Role / Timing Role: Timing-critical isolator for synchronous rectifier gate drive and isolated ADC sampling clocks. Use Value: Sub-10 ns propagation delay and <0.5 ns skew preserve PWM dead-time integrity and ADC sampling window accuracy. |
| Traction Inverter Control | Hybrid Electric Vehicle Power Distribution |
Use Scenario: Transmitting PWM commands from inverter MCU to isolated gate driver ICs controlling SiC MOSFET half-bridges. IC Role / Device Role / Timing Role: High-speed digital isolator delivering synchronized gate signals across isolation barrier with minimal skew. Use Value: 150 Mbps capability supports advanced modulation schemes (e.g., SVM, SVPWM) without timing bottlenecks. |
Use Scenario: Isolating CAN FD communication and HV contactor status reporting between 12 V body control module and 48 V/400 V power domains. IC Role / Device Role / Timing Role: Dual-supply isolator enabling level-shifted, noise-immune data exchange across safety boundaries. Use Value: Schmitt-trigger inputs and 50 kV/µs CMTI prevent false triggering in EMI-heavy hybrid powertrain environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8663BB-AS1 | Same package and pinout; default output state is low (B = low-fail-safe), identical electrical specs except output default logic state. | Used where fail-safe low is required for active-high gate drivers or relay controls. | Select SI8663AB-AS1 only when low-default behavior is mandatory per system safety architecture. |
| ADUM6603ARWZ | 6-channel, 2.5 kV isolation, but 25 Mbps max data rate and higher 10.5 mA @ 1 Mbps supply current; SOIC-16 WB package. | Targeted at lower-speed industrial PLC I/O modules, not automotive high-bandwidth applications. | Choose ADUM6603ARWZ only if data rate <25 Mbps suffices and wider creepage (>10 mm) is needed for 5 kVRMS systems. |
Compared with SI8663BB-AS1, SI8663AB-AS1 offers identical performance but guarantees fail-safe low output - critical for preventing unintended power stage activation. Versus ADUM6603ARWZ, SI8663AB-AS1 delivers 6× higher bandwidth and 35% lower power at 100 Mbps, making it suitable for next-generation EV power electronics.
Availability
SI8663AB-AS1 is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, traction inverters, and hybrid electric vehicle power distribution requiring stable component supply with automotive-grade traceability.
Supply support for SI8663AB-AS1 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 automotive, industrial, and communications markets.
The SI866x family was designed specifically for high-reliability automotive and industrial isolation needs - emphasizing AEC-Q100 qualification, 60-year lifetime, and RF-based architecture to replace aging optocoupler solutions.
FAQ
What is the isolation rating and certification status of the SI8663AB-AS1?
The SI8663AB-AS1 provides 2.5 kVRMS isolation and is certified to UL 1577, CSA Component Acceptance Notice 5A, VDE 0884-10, and IEC 60950-1/62368-1 for reinforced insulation. These approvals validate its use in automotive on-board chargers and battery management systems requiring functional safety compliance.
Does the SI8663AB-AS1 require external startup initialization or configuration?
No, the SI8663AB-AS1 requires no startup initialization. It begins transmitting valid data within 15–40 µs after power application due to its RF-modulation architecture. This eliminates firmware boot dependencies and simplifies system-level timing design for SI8663AB-AS1 integration.
How does the fail-safe mode function in the SI8663AB-AS1 during power loss?
When VDD1 is unpowered and VDD2 remains active, the SI8663AB-AS1 forces all six outputs to logic low - a factory-configured behavior confirmed by the "AB" suffix. This prevents unintended activation of high-side switches in power inverters and aligns with ISO 26262 ASIL-B fault response requirements.
What are the supply current characteristics of the SI8663AB-AS1 at 100 Mbps operation?
At 100 Mbps and 5 V supply, the SI8663AB-AS1 draws 16.4 mA per side (VDD1 and VDD2), totaling 32.8 mA. This ultra-low power consumption is measured with 15 pF capacitive load on all outputs and enables thermal-efficient layout in space-constrained automotive ECUs.
Is the SI8663AB-AS1 compatible with 2.5 V and 3.3 V logic families?
Yes, the SI8663AB-AS1 supports 2.5–5.5 V operation on both VDD1 and VDD2 sides. Its input thresholds (VT+ = 1.67 V typ, VT– = 1.23 V typ) and 3.3 V–compatible VOH/VOL ensure reliable interfacing with 2.5 V, 3.3 V, and 5 V MCUs and peripherals without external level shifters.
SI8663AB-AS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (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:
- -
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- -
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- -
- 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
SI8663AB-AS1 FAQ
1.How can I place an order for SI8663AB-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663AB-AS1 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 SI8663AB-AS1 reliable?
The price and inventory of SI8663AB-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8663AB-AS1 is usually 5 days.
3.What payment methods are accepted for SI8663AB-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663AB-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663AB-AS1?
SI8663AB-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663AB-AS1 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 SI8663AB-AS1?
For technical support, including SI8663AB-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663AB-AS1 requirements.
6.How does Aetrix verify that SI8663AB-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8663AB-AS1 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 SI8663AB-AS1 meets industry standards.
7.What is the process for return or replacement of SI8663AB-AS1?
All SI8663AB-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8663AB-AS1, 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 SI8663AB-AS1 part is unused and in its original packaging.
Return procedure for SI8663AB-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663AB-AS1 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.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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