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Skyworks Solutions Inc. SI8662AB-AS1
- Part No.:
- SI8662AB-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8662AB-AS1.pdf
- Description:
- AUTOMOTIVE 2.5 KV 4 FORWARD & 2
- Quantity:
- Payment:
- Shipping:
Inventory:1,777
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Product details
Overview
SI8662AB-AS1 from Skyworks is a six-channel automotive-grade digital isolator with 4 input channels on VDD1 side and 2 on VDD2 side, 2.5 kV RMS isolation rating, 150 Mbps data rate, <10 ns propagation delay, and selectable low-default fail-safe output mode. It enables robust signal transmission across high-voltage barriers in battery management systems and traction inverters.
For engineers reviewing the SI8662AB-AS1 datasheet, SI8662AB-AS1 pinout, SI8662AB-AS1 application, or SI8662AB-AS1 equivalent, this page delivers verified electrical specs, SOIC-16 narrow-body package details, AEC-Q100 qualification status, and real-world timing performance for high-noise industrial and automotive isolation design.
Technical Context
The SI8662AB-AS1 implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling immediate data transmission after power-up. Its dual-supply architecture supports independent 2.5–5.5 V operation on both sides with undervoltage lockout (UVLO) thresholds at 2.24 V (rising) and 2.16 V (falling).
Schmitt-trigger inputs provide 0.44 V typical hysteresis for noise immunity, while output drivers deliver 50 Ω nominal impedance and support controlled-impedance PCB routing. The device achieves 50 kV/µs common-mode transient immunity and maintains stable timing-0.5 ns channel-channel skew, 2 ns propagation delay skew-across –40 to 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and CAN FD without external clock conditioning |
| Propagation Delay | 8.0 ns typical - enables sub-10 ns timing-critical feedback loops in motor control and power converter gate drivers |
| Isolation Rating | 2.5 kV RMS - certified to UL 1577, VDE 0884-10, and IEC 62368-1 for reinforced insulation in industrial and automotive end-equipment |
| 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 |
| Channel Configuration | 4-input / 2-output - optimized for asymmetric bidirectional communication paths such as isolated ADC data + control/status lines |
| Fail-Safe Default | Low output state - ensures defined logic level during VDD1 power loss, critical for safety shutdown sequencing in BMS |
| Operating Temperature | –40 to 125 °C - qualified per AEC-Q100 Grade 1 for under-hood and battery-pack applications |
Pinout & Package
SI8662AB-AS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC package (NB SOIC-16) with 1.27 mm pitch, 10.3 mm × 7.5 mm footprint, and 2.65 mm max height. Creepage and clearance meet 8 mm requirements for reinforced insulation at 2.5 kV RMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | VDD1-side input channels | Accept logic-level signals from MCU or sensor interface; Schmitt-trigger inputs tolerate slow edges and noise |
| 5, 6 | VDD2-side output channels | Drive isolated loads up to 4 mA; 50 Ω output impedance supports 50 Ω trace termination |
| 7, 14 | GND1, GND2 | Separate ground references for primary and secondary sides; must not be shorted to maintain isolation barrier integrity |
| 8, 15 | VDD1, VDD2 | Independent 2.5–5.5 V supplies; each requires local 0.1 µF bypass capacitor placed adjacent to pin |
| 9–13 | VDD1-side outputs / VDD2-side inputs | Unused channels are internally terminated; no external pull-ups/downs required due to fail-safe configuration |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift issues of optocouplers; enables 60-year lifetime at rated working voltage |
| Selectably low-default output | Ensures safe deactivation of downstream power stages during input-side brownout-no external supervision circuit needed |
| Ultra-low power at 100 Mbps | 12.8 mA (VDD1) + 19.4 mA (VDD2) total - reduces thermal load in sealed battery enclosures and simplifies heatsinking |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with zero-defect manufacturing flow, PPAP documentation, and IMDS/CAMDS compliance |
| High CMTI | 50 kV/µs common-mode transient immunity - prevents data corruption during fast-switching events in SiC/GaN inverters |
Applications
| Motor Control Feedback Loop | Isolated Battery Cell Monitoring |
|---|---|
Use Scenario: Transmitting PWM gate drive signals and current-sense feedback across isolation barrier in 400 V traction inverter. IC Role / Device Role / Timing Role: Six-channel isolator provides 4x isolated gate driver enable/control lines and 2x isolated analog-to-digital converter data streams. Use Value: 8 ns typical propagation delay and 0.5 ns channel-channel skew preserve precise timing alignment between phase legs, minimizing shoot-through risk. |
Use Scenario: Reading voltage and temperature telemetry from 12-series lithium-ion cells in EV battery pack with centralized BMS controller. IC Role / Device Role / Timing Role: Isolates UART or SPI communication from cell monitoring ICs to main BMS MCU across 2.5 kV barrier. Use Value: Low-default fail-safe mode forces all outputs low during cell-side power loss, preventing false fault reporting or unintended relay activation. |
| On-Board Charger (OBC) Control | Traction Inverter Gate Driver Interface |
Use Scenario: Isolating digital control signals between AC/DC and DC/DC stages in bidirectional OBC with 800 V architecture. IC Role / Device Role / Timing Role: Transmits enable, fault, and status bits between isolated control domains using four input and two output channels. Use Value: 150 Mbps capability supports encrypted command handshaking and real-time diagnostics without bandwidth bottleneck. |
Use Scenario: Interfacing isolated gate driver ICs (e.g., Si827x) to MCU in high-power traction inverter with SiC MOSFETs. IC Role / Device Role / Timing Role: Delivers isolated PWM inputs and receives isolated DESAT/fault feedback with sub-10 ns latency. Use Value: 50 kV/µs CMTI withstands fast dV/dt transients (>50 V/ns) generated by SiC switching, ensuring reliable fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8662BB-AS1 | Same 4/2 channel count, SOIC-16 NB package, and 2.5 kV rating-but default output state is low (B suffix), not configurable via ordering option. | Not suitable where fail-safe high default is required; identical performance otherwise. | Select SI8662AB-AS1 when low-default behavior is mandatory for system safety logic. |
| ISO6762-Q1 | TI's 6-channel automotive isolator with 5000 VRMS rating, 50 Mbps max data rate, and 11 ns propagation delay; uses capacitive isolation. | Better suited for lower-speed, higher-isolation applications (e.g., charging station mains interface); lacks 150 Mbps capability. | Choose ISO6762-Q1 only if 5 kV isolation is required and data rate ≤50 Mbps suffices. |
Compared with SI8662BB-AS1, SI8662AB-AS1 guarantees low-default fail-safe behavior essential for BMS shutdown sequencing; versus ISO6762-Q1, it delivers 3× higher data rate and tighter timing for real-time inverter control-making it the optimal choice for next-generation EV power electronics.
Availability
SI8662AB-AS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and industrial motor drives requiring stable component supply across automotive production lifecycles.
Supply support for SI8662AB-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
The SI866x family was designed specifically for high-reliability, high-speed digital isolation in automotive electrification and industrial automation-replacing optocouplers with CMOS-based RF isolation that delivers superior lifetime, timing, and power efficiency.
FAQ
What is the isolation voltage rating of SI8662AB-AS1?
The SI8662AB-AS1 has a certified 2.5 kV RMS isolation rating per UL 1577, VDE 0884-10, and IEC 62368-1 standards. This rating applies to reinforced insulation and is validated for continuous operation at rated working voltage over a 60-year lifetime. It is not rated for 5 kV operation-higher isolation variants like SI8662BD-AS require wide-body SOIC packaging.
Does SI8662AB-AS1 require external startup initialization?
No, SI8662AB-AS1 requires no startup initialization. Its RF-based architecture begins transmitting valid data within 40 µs of VDD1 reaching UVLO threshold (2.24 V). Output states transition cleanly from fail-safe default to input-following behavior without glitches or metastability, eliminating boot firmware dependencies.
How does the fail-safe mode function in SI8662AB-AS1?
In SI8662AB-AS1, the fail-safe mode defaults all six outputs to logic low when VDD1 is unpowered (0 V) but VDD2 remains active. This behavior is hard-coded into the device ordering option ('A' suffix = low-default) and does not require external resistors or configuration pins. It ensures predictable shutdown of downstream circuits during input-side power loss.
What is the maximum ambient temperature for continuous operation of SI8662AB-AS1?
SI8662AB-AS1 operates continuously from –40 to 125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements. At 125 °C, its 150 Mbps data rate and 8 ns propagation delay remain fully specified-no derating is needed for automotive under-hood or battery-pack environments.
Can SI8662AB-AS1 interface directly with 3.3 V and 5 V logic families?
Yes, SI8662AB-AS1 supports 2.5–5.5 V operation on both VDD1 and VDD2 sides. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V, allowing direct connection to 3.3 V CMOS and 5 V TTL logic without level shifters. Input thresholds (VT+ = 1.67 V typ, VT– = 1.23 V typ) ensure noise margin across both voltage domains.
SI8662AB-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
SI8662AB-AS1 FAQ
1.How can I place an order for SI8662AB-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8662AB-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 SI8662AB-AS1 reliable?
The price and inventory of SI8662AB-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8662AB-AS1 is usually 5 days.
3.What payment methods are accepted for SI8662AB-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8662AB-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8662AB-AS1?
SI8662AB-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8662AB-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 SI8662AB-AS1?
For technical support, including SI8662AB-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8662AB-AS1 requirements.
6.How does Aetrix verify that SI8662AB-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8662AB-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 SI8662AB-AS1 meets industry standards.
7.What is the process for return or replacement of SI8662AB-AS1?
All SI8662AB-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8662AB-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 SI8662AB-AS1 part is unused and in its original packaging.
Return procedure for SI8662AB-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8662AB-AS1 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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