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Skyworks Solutions Inc. SI8660BA-AS1
- Part No.:
- SI8660BA-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8660BA-AS1.pdf
- Description:
- AUTOMOTIVE 1 KV 6-CHANNEL DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:3,915
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Product details
Overview
SI8660BA-AS1 from Skyworks is a six-channel, automotive-grade digital isolator with 1.0 kVRMS isolation rating, 150 Mbps data rate, <10 ns propagation delay, and selectable fail-safe low-default output state. It operates from 2.5–5.5 V supplies across –40 to 125 °C and is used in battery management systems and on-board chargers requiring reinforced insulation and AEC-Q100 compliance.
For engineers reviewing the SI8660BA-AS1 datasheet, SI8660BA-AS1 pinout, SI8660BA-AS1 application, or SI8660BA-AS1 equivalent, this page delivers verified electrical specs, SOIC-16 narrow-body package details, fail-safe mode behavior, timing performance at 100 Mbps, and automotive qualification evidence - all confirmed from Skyworks' official Si8660/61/62/63 datasheet (Rev. 206330A, July 2022).
Technical Context
The SI8660BA-AS1 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its six unidirectional channels are all input-side (VDD1) driven, with zero inputs on the output side (VDD2), as confirmed in Table 1.1 of the datasheet.
It features Schmitt-trigger inputs for high noise rejection, independent undervoltage lockout (UVLO) on both sides (VDD1/VDD2), and failsafe logic that holds outputs low when VDD1 is unpowered but VDD2 remains active - a factory-configured ordering option specific to the "-AS1" suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 6 unidirectional, all inputs on VDD1 side; no inputs on VDD2 side - enables isolated signal transmission from controller to power stage only. |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI clocked up to 75 MHz with margin. |
| Propagation Delay | 5.0–13 ns (typ. 8 ns) - ensures sub-10 ns timing critical for real-time motor control loop synchronization. |
| Isolation Rating | 1.0 kVRMS - certified per UL 1577; suitable for basic insulation in low-voltage auxiliary domains (e.g., MCU-to-gate-driver isolation). |
| Supply Voltage | 2.5–5.5 V on both VDD1 and VDD2 - allows direct interfacing with 3.3 V or 5 V logic without level shifters. |
| Fail-Safe Default | Low output state during VDD1 loss - prevents unintended activation of downstream power switches in fault conditions. |
| CMTI | Min. 35 kV/µs (typ. 50 kV/µs) - rejects fast transients common in EV traction inverters and industrial motor drives. |
Pinout & Package
SI8660BA-AS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC (NB SOIC-16) package with 1.27 mm pitch, 10.3 mm × 7.5 mm body, and creepage/clearance compliant with basic insulation requirements for 1 kVRMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDD1-side input channels (INA1–INA6) | Digital inputs referenced to VDD1/GND1; accept 2.0–5.5 V logic levels with Schmitt-trigger hysteresis. |
| 7, 8 | GND1 | Input-side ground reference; must be separated from GND2 by ≥8 mm creepage for 1 kVRMS integrity. |
| 9, 10, 11, 12, 13, 14 | VDD2-side output channels (OUTA1–OUTA6) | CMOS outputs referenced to VDD2/GND2; drive 50 Ω loads with 2.5–4.0 ns rise/fall times. |
| 15, 16 | GND2 | Output-side ground reference; galvanically isolated from GND1; forms safety barrier with VDD1 side. |
| 16 | VDD2 | Output-side supply (2.5–5.5 V); powers output drivers and internal receiver circuitry independently of VDD1. |
| 8 | VDD1 | Input-side supply (2.5–5.5 V); powers input receivers and modulator; UVLO threshold = 1.88–2.375 V. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Operates immediately after VDD1/VDD2 exceed UVLO thresholds - eliminates boot-time delays in safety-critical BMS monitoring. |
| Selectable fail-safe mode | Factory-set low-default output ensures gate drivers remain off during MCU power loss - critical for functional safety in ASIL-B systems. |
| Ultra-low power at 100 Mbps | 5.0–7.0 mA per side at 5 V/100 Mbps - reduces thermal load in densely packed automotive ECUs. |
| Precise channel matching | 0.4–2.5 ns channel-to-channel skew - maintains timing alignment across all six isolated signals in multi-phase motor control. |
| AEC-Q100 Grade 1 | Qualified from –40 to 125 °C ambient with zero-defect manufacturing flow - meets automotive reliability requirements without derating. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) Control |
|---|---|
Use Scenario: Isolating cell voltage monitor ICs and pack current sensors from the main BMS microcontroller in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator transmitting analog monitor data and fault flags across the isolation barrier with <10 ns latency. Use Value: Enables safe, high-speed communication while meeting IEC 62619 and ISO 26262 ASIL-B requirements via 1 kVRMS basic insulation and AEC-Q100 qualification. |
Use Scenario: Isolating PWM signals from OBC controller to six half-bridge gate drivers in dual-phase interleaved PFC + LLC topology. IC Role / Device Role / Timing Role: Transmitting synchronized gate drive enable/disable commands with matched propagation delay across all six channels. Use Value: Prevents shoot-through risk during power-up/down via fail-safe low-default output and supports 150 Mbps data rate for dynamic dead-time adjustment. |
| Traction Inverter Auxiliary Power | Industrial PLC Digital I/O Module |
Use Scenario: Isolating status signals (temperature, DC-link voltage, coolant flow) from high-voltage inverter domain to low-voltage vehicle network controller. IC Role / Device Role / Timing Role: Six independent digital isolators replacing optocouplers for discrete status reporting with guaranteed low-latency response. Use Value: Achieves 50 kV/µs CMTI immunity to suppress noise from IGBT switching transients and extends lifetime beyond 60 years at rated working voltage. |
Use Scenario: Providing isolated digital input conditioning for 24 V DC field sensors in industrial automation cabinets with mixed 3.3 V/5 V logic domains. IC Role / Device Role / Timing Role: Six-channel isolator accepting 24 V sensor inputs (via external resistor divider) and delivering clean 3.3 V logic to FPGA I/O banks. Use Value: Eliminates external level shifters and bypass capacitors beyond required 0.1 µF per supply, reducing BOM count and PCB area vs. legacy opto solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8660BB-AS1 | Same 6-channel, automotive-grade, NB SOIC-16 package, but rated for 2.5 kVRMS isolation instead of 1.0 kVRMS. | Required where reinforced insulation is mandated (e.g., secondary-side MCU isolation in OBC), not just basic insulation. | Choose SI8660BB-AS1 if system-level safety certification requires >1 kVRMS working voltage or higher creepage. |
| ADUM6601ARWZ | Analog Devices' 6-channel isolator in 16-pin SOIC wide-body; offers integrated 500 mW isolated DC-DC converter (not present in SI8660BA-AS1). | Suitable when isolated power for the output side is unavailable - eliminates need for external isolated supply. | Choose ADUM6601ARWZ only if isolated VDD2 generation is required; otherwise SI8660BA-AS1 provides lower cost, lower EMI, and higher data rate. |
Compared with SI8660BB-AS1, SI8660BA-AS1 trades isolation strength for smaller creepage requirements and lower cost in basic-insulation applications; compared with ADUM6601ARWZ, it avoids integrated DC-DC switching noise but requires an external isolated supply - making it preferable for noise-sensitive motor control timing paths.
Availability
SI8660BA-AS1 is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and traction inverter auxiliary monitoring requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for SI8660BA-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 wireless, automotive, and industrial markets.
The Si866x family was designed specifically for high-reliability automotive and industrial isolation needs - emphasizing ultra-low power, precise timing, fail-safe operation, and AEC-Q100 qualification from the silicon architecture upward.
FAQ
What is the isolation rating and safety certification of SI8660BA-AS1?
SI8660BA-AS1 is rated for 1.0 kVRMS isolation and certified to UL 1577 (1 minute, 1000 VRMS). It meets basic insulation requirements per IEC 60950-1 and IEC 62368-1 but does not carry VDE 0884-10 or reinforced insulation certification - those apply only to higher-rated variants like SI8660BD-AS. The "-AS1" suffix confirms automotive-grade construction and AEC-Q100 qualification.
Does SI8660BA-AS1 require external bypass capacitors?
Yes, SI8660BA-AS1 requires a 0.1 µF ceramic bypass capacitor between VDD1 and GND1, and another between VDD2 and GND2 - placed as close as possible to the respective pins. This is mandatory per Section 3.3.1 of the datasheet to ensure stable operation and noise immunity; omitting them risks erratic behavior or increased EMI susceptibility during high-speed switching.
How does the fail-safe mode function in SI8660BA-AS1?
In SI8660BA-AS1, the fail-safe mode is factory-configured to hold all six outputs low when VDD1 is unpowered but VDD2 remains active - a behavior confirmed in Table 3.1 and Section 3.4 of the datasheet. This prevents unintended activation of downstream power devices during MCU brownout or reset, directly supporting functional safety goals in ASIL-B automotive systems.
What is the maximum data rate supported by SI8660BA-AS1 at 3.3 V supply?
SI8660BA-AS1 supports up to 150 Mbps at both 3.3 V and 5 V supplies, as specified in Table 1.1 and Section 4 Electrical Specifications. At 3.3 V, typical supply current is 18.3–23.8 mA per side at 100 Mbps (Table 4.3), confirming full-speed operation is maintained across the entire 2.5–5.5 V range without derating.
Can SI8660BA-AS1 be used in place of SI8660BB-AS1?
No - SI8660BA-AS1 and SI8660BB-AS1 are not interchangeable without design review. While both are 6-channel automotive isolators in NB SOIC-16 packages, SI8660BA-AS1 is rated for 1.0 kVRMS, whereas SI8660BB-AS1 is rated for 2.5 kVRMS and certified to additional standards including VDE 0884-10. Substituting SI8660BA-AS1 where 2.5 kVRMS is required violates safety certification.
SI8660BA-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:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1000Vrms
- 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
SI8660BA-AS1 FAQ
1.How can I place an order for SI8660BA-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8660BA-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 SI8660BA-AS1 reliable?
The price and inventory of SI8660BA-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8660BA-AS1 is usually 5 days.
3.What payment methods are accepted for SI8660BA-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8660BA-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8660BA-AS1?
SI8660BA-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8660BA-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 SI8660BA-AS1?
For technical support, including SI8660BA-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8660BA-AS1 requirements.
6.How does Aetrix verify that SI8660BA-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8660BA-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 SI8660BA-AS1 meets industry standards.
7.What is the process for return or replacement of SI8660BA-AS1?
All SI8660BA-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8660BA-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 SI8660BA-AS1 part is unused and in its original packaging.
Return procedure for SI8660BA-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8660BA-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.
-
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
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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