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Skyworks Solutions Inc. SI86S631BC-AS1R
- Part No.:
- SI86S631BC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S631BC-AS1R.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 3 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
SI86S631BC-AS1R from Skyworks Solutions is a 3-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features tri-state outputs with enable, selectable fail-safe mode (default high/low), and operates across –40 to 125 °C with 2.25–5.5 V dual-supply support. It is used in battery management systems and traction inverters where high noise immunity and safety-certified signal isolation are required.
For engineers reviewing the SI86S631BC-AS1R datasheet, SI86S631BC-AS1R pinout, SI86S631BC-AS1R application, or SI86S631BC-AS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, 10 ns typical propagation delay, 3.5 ns pulse width distortion, transient immunity ≥100 kV/µs, and WB SOIC-16 package compatibility with 6000 VRMS withstand voltage.
Technical Context
The SI86S631BC-AS1R implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent UVLO and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.
It delivers precise timing with 10 ns typical propagation delay and 3.5 ns pulse width distortion, while supporting tri-state output control via EN1/EN2 pins and fail-safe default states configurable at order time. The device integrates Schmitt-trigger + CMOS threshold inputs and requires only 0.1 µF and 10 µF bypass capacitors per supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed serial interfaces including isolated SPI and CAN FD gateways. |
| Isolation Rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for industrial and automotive safety-critical systems. |
| Propagation Delay | 10 ns typical - enables tight timing budgets in motor control feedback loops and real-time power converter control. |
| Pulse Width Distortion | 3.5 ns typical - ensures minimal duty cycle error in PWM signal isolation for gate drivers and ADC sampling clocks. |
| Supply Voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level shifters. |
| Transient Immunity | ≥100 kV/µs - suppresses fast common-mode transients in high-di/dt environments like inverters and chargers. |
| Operating Temperature | –40 to 125 °C - qualified for under-hood automotive use and industrial ambient conditions without derating. |
| AEC-Q100 Grade | Grade 1 - validated for automotive applications including onboard chargers and battery management systems. |
Pinout & Package
SI86S631BC-AS1R uses a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS operation. Pin layout follows the Si86S63x family configuration with three bidirectional channels, dual enable inputs, and separate supply/ground rails per side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN1) | Side A output enable input | Active-high control for tristating all Side A outputs (A1–A3); enables low-power shutdown when inactive. |
| 2 (VDD1) | Side A power supply | 2.25–5.5 V supply for input-side circuitry; requires 0.1 µF + 10 µF local bypassing. |
| 3 (A1) | Side A channel 1 I/O | Bidirectional isolated data path; supports Schmitt-trigger + CMOS input thresholds for noise immunity. |
| 4 (A2) | Side A channel 2 I/O | Independent isolated channel with identical timing and drive specs as A1/A3. |
| 5 (A3) | Side A channel 3 I/O | Third isolated channel; shares same fail-safe default state configured at order time (high or low). |
| 6 (NC) | No connect | Internally unconnected; must remain floating or grounded per layout guidelines. |
| 7–8 (GND1) | Side A ground | Reference for VDD1 and Side A signals; requires low-inductance connection to local ground plane. |
| 9–10 (B1, B2) | Side B channel 1–2 I/O | Isolated output-side counterparts to A1/A2; electrically separated by reinforced barrier. |
| 11 (B3) | Side B channel 3 I/O | Corresponds to A3; maintains same fail-safe behavior and timing specs across isolation boundary. |
| 12 (EN2) | Side B output enable input | Active-high control for tristating all Side B outputs (B1–B3); independent of EN1 for asymmetric control. |
| 13 (GND2) | Side B ground | Isolated reference for VDD2 and Side B signals; must be separated from GND1 by minimum creepage distance. |
| 14 (VDD2) | Side B power supply | 2.25–5.5 V supply for output-side circuitry; independent of VDD1 for dual-domain operation. |
| 15–16 (GND1) | Side A ground (redundant) | Second GND1 pin for improved grounding; connects to same net as pin 7–8. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced IEC 60747-17 rating | Validated for functional safety systems requiring dual-insulation integrity in EV traction inverters and medical isolation barriers. |
| Tri-state outputs with independent EN1/EN2 | Enables dynamic bus sharing in multi-master isolated networks without contention or external logic. |
| Selectable fail-safe output state | Configurable at order time (BC = default high, BD = default low) to ensure safe system state during power loss in BMS monitoring paths. |
| Schmitt-trigger + CMOS threshold inputs | Provides >0.15 × VDD input hysteresis, rejecting EMI-induced glitches in noisy motor drive environments. |
| No start-up initialization | RF-modulated architecture eliminates boot delay-outputs follow inputs within 0.3 ms after VDD exceeds UVLO+ (2.18 V typical). |
| 100 kV/µs transient immunity | Withstands fast dv/dt events in SiC/GaN inverter switching nodes without data corruption or latch-up. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack current sensing signals between high-voltage battery stack and low-voltage MCU domain. IC Role / Device Role / Timing Role: Signal-level galvanic isolation for analog front-end ADC references and digital status lines, maintaining <10 ns timing alignment across domains. Use Value: Enables accurate SOC/SOH estimation under 125 °C ambient while meeting IEC 61508 SIL-2 requirements via reinforced insulation. |
Use Scenario: Transmitting PWM gate drive commands and fault feedback from MCU to isolated gate drivers in 800 V EV inverters. IC Role / Device Role / Timing Role: High-speed, low-skew isolation of complementary PWM pairs with 3.5 ns pulse width distortion to prevent shoot-through. Use Value: Supports >100 kHz switching frequencies with deterministic latency, reducing thermal stress on SiC MOSFETs. |
| Onboard Charger (OBC) | Industrial PLC I/O Module |
|
Use Scenario: Isolating communication between AC/DC and DC/DC controller sections in bi-directional OBCs for V2G applications. IC Role / Device Role / Timing Role: Bidirectional data isolation for CAN FD and isolated SPI between primary and secondary control domains. Use Value: Maintains 150 Mbps throughput across 6000 VRMS barrier, enabling real-time grid synchronization and fault logging. |
Use Scenario: Providing channelized isolation for digital input/output terminals in modular PLC backplanes exposed to 300 VAC field wiring. IC Role / Device Role / Timing Role: Three independent isolation channels handling discrete sensor inputs, actuator outputs, and diagnostic status flags. Use Value: Eliminates ground loops and common-mode noise in factory automation, improving MTBF by >5× vs optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3301ARWZ | 3-channel, 25 Mbps max, 2.5–5.5 V, 3750 VRMS, SOIC-16 (standard body) | Limited to industrial temp (–40 to 105 °C); no AEC-Q100 or 6000 VRMS rating | Choose for cost-sensitive non-automotive designs where 25 Mbps suffices and creepage >8 mm not required. |
| ISO6731FDWR | 3-channel, 50 Mbps max, 2.25–5.5 V, 5000 VRMS, SOIC-16 (wide body) | Lower CMTI (85 kV/µs), no fail-safe option, non-AEC-Q100 | Use where UL 1577 5000 VRMS is acceptable and automotive qualification is not mandated. |
Compared with ADUM3301ARWZ and ISO6731FDWR, SI86S631BC-AS1R provides 6× higher data rate, 20% higher transient immunity, full AEC-Q100 Grade 1 compliance, and certified 6000 VRMS reinforced insulation-making it the only option qualified for high-voltage automotive powertrain subsystems.
Availability
SI86S631BC-AS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI86S631BC-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 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 Si86S6xx family was designed specifically for high-reliability, high-noise-immunity digital isolation in automotive power electronics and industrial automation-emphasizing reinforced safety certification, extended temperature operation, and RF-based timing precision.
FAQ
What is the isolation voltage rating of SI86S631BC-AS1R and which safety standards does it meet?
SI86S631BC-AS1R has a 6000 VRMS isolation rating for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation), CSA 62368-1/60601-1, and CQC GB4943.1. This makes SI86S631BC-AS1R suitable for high-voltage automotive and medical applications where dual insulation integrity is mandatory.
Does SI86S631BC-AS1R require external start-up initialization or configuration?
No, SI86S631BC-AS1R uses an RF-modulated architecture with no firmware or calibration sequence. It begins passing signals within 0.3 ms after VDD exceeds UVLO+ (2.18 V typical), with outputs transitioning to their fail-safe default state (high, per BC suffix) without host intervention.
How does the fail-safe mode work on SI86S631BC-AS1R, and how is it selected?
The SI86S631BC-AS1R is ordered with "BC" suffix indicating default-high fail-safe behavior: when VDD1 is unpowered but VDD2 remains active, outputs B1–B3 drive high. This is factory-configured and cannot be changed in-circuit; alternative "BD" parts provide default-low behavior.
What are the supply bypassing requirements for SI86S631BC-AS1R?
SI86S631BC-AS1R requires a 0.1 µF ceramic capacitor and a 10 µF bulk capacitor placed as close as possible between VDD1–GND1 and VDD2–GND2. These minimize supply ripple and ensure stable RF oscillator operation-omitting either capacitor risks increased jitter or startup failure.
Can SI86S631BC-AS1R be used in SPI isolation applications?
Yes, SI86S631BC-AS1R supports isolated SPI by assigning A1/B1 to SCLK, A2/B2 to MOSI/MISO, and A3/B3 to CS. While not a dedicated SPI isolator like Si86SS41, its 150 Mbps rate, low skew, and tri-state enables robust multi-drop SPI bus isolation in BMS and OBC controllers.
SI86S631BC-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:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86S631BC-AS1R FAQ
1.How can I place an order for SI86S631BC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S631BC-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 SI86S631BC-AS1R reliable?
The price and inventory of SI86S631BC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S631BC-AS1R is usually 5 days.
3.What payment methods are accepted for SI86S631BC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S631BC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S631BC-AS1R?
SI86S631BC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S631BC-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 SI86S631BC-AS1R?
For technical support, including SI86S631BC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S631BC-AS1R requirements.
6.How does Aetrix verify that SI86S631BC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI86S631BC-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 SI86S631BC-AS1R meets industry standards.
7.What is the process for return or replacement of SI86S631BC-AS1R?
All SI86S631BC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S631BC-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 SI86S631BC-AS1R part is unused and in its original packaging.
Return procedure for SI86S631BC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S631BC-AS1R 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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