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Skyworks Solutions Inc. SI86S631BE-AS2
- Part No.:
- SI86S631BE-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S631BE-AS2.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 3 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,557
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Product details
Overview
SI86S631BE-AS2 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 Schmitt-trigger + CMOS inputs, tri-state outputs with enable, selectable fail-safe default-high/low output, and operates across –40 to 125 °C in WB SOIC-16 package. Used in battery management systems and traction inverters where high CMTI and safety-certified galvanic isolation are required.
For engineers reviewing the SI86S631BE-AS2 datasheet, SI86S631BE-AS2 pinout, SI86S631BE-AS2 application, or SI86S631BE-AS2 equivalent, key selection criteria include reinforced IEC 60747-17 certification, 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs transient immunity, and dual supply operation (2.25–5.5 V per side) supporting isolated ADC/DAC interfaces and motor control signal conditioning.
Technical Context
The SI86S631BE-AS2 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 on both sides (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 maintaining tri-state output control via EN1/EN2 pins and configurable fail-safe behavior during power loss. The device uses HF XMTR/RCVR circuitry per channel and requires only 0.1 µF + 10 µF bypass capacitors per supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, CAN FD, and real-time control loops without protocol translation. |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for automotive BMS and OBC applications. |
| Propagation delay | 10 ns typical - enables sub-100 ns closed-loop timing in motor gate drivers and isolated current sensing. |
| Pulse width distortion | 3.5 ns typical - preserves duty cycle integrity for PWM signals across isolation barrier. |
| Transient immunity | 100 kV/µs minimum - withstands fast EFT/burst events in noisy industrial and EV power stages. |
| Supply voltage | 2.25–5.5 V per side - allows direct interface with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive use and industrial motor drives. |
Pinout & Package
SI86S631BE-AS2 is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced insulation. Pin 1 is marked with a dot; pin 16 is VDD2.
| 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 system-level power gating. |
| 2 VDD1 | Side A supply | 2.25–5.5 V power for transmitter circuits and input logic on Side A. |
| 3 A1 | Side A digital I/O | Unidirectional or bidirectional isolated signal path (configurable via external logic). |
| 4 A2 | Side A digital I/O | Independent isolated channel with same timing specs as A1. |
| 5 A3 | Side A digital I/O | Third isolated channel; supports redundant sensing or multi-signal isolation in BMS. |
| 6 NC | No connect | Internally unconnected; must be left floating or tied to GND per layout guidelines. |
| 7 B1 | Side B digital I/O | Corresponding isolated output for A1; referenced to VDD2/GND2. |
| 8 B2 | Side B digital I/O | Corresponding isolated output for A2; supports differential signaling when paired. |
| 9 B3 | Side B digital I/O | Corresponding isolated output for A3; maintains 3.5 ns PW distortion across all channels. |
| 10 EN2 | Side B output enable input | Active-high control for tristating all Side B outputs (B1–B3); decouples isolated side during fault conditions. |
| 11 GND2 | Side B ground | Reference return for Side B circuits; must be separated from GND1 by ≥8 mm creepage. |
| 12 VDD2 | Side B supply | 2.25–5.5 V power for receiver circuits and output drivers on Side B. |
| 13 GND1 | Side A ground | Reference return for Side A circuits; forms primary isolation barrier with GND2. |
| 14 HF XMTR | High-frequency transmitter node | Internal RF carrier modulation node; not user-accessible but critical for CMTI performance. |
| 15 HF RCVR | High-frequency receiver node | Internal demodulation node; ensures <10 ns propagation delay and low jitter. |
| 16 NC | No connect | Internally unconnected; no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay-output follows input immediately after UVLO exit (~0.3 ms). |
| Tri-state outputs with enable | EN1/EN2 pins allow dynamic disabling of entire Side A or Side B I/O banks for bus arbitration or fault containment. |
| Selectable fail-safe mode | Ordering option determines default output state (high or low) during VDD1 undervoltage-critical for safe shutdown in traction inverters. |
| Schmitt trigger + CMOS inputs | Input hysteresis ≥0.15 × VDDx rejects >36 ns noise pulses and ensures clean edge detection in EMI-heavy environments. |
| AEC-Q100 Grade 1 | Qualified for automotive applications up to 125 °C ambient-validates reliability for onboard chargers and battery management IC interfaces. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitor signals and pack contactor control lines between high-voltage battery stack and low-voltage MCU. IC Role / Device Role / Timing Role: SI86S631BE-AS2 provides three independent, reinforced-isolation paths for voltage sense, temperature, and precharge control with <10 ns timing skew. Use Value: Enables functional safety compliance (ISO 26262 ASIL-B) via 6000 VRMS isolation and AEC-Q100 qualification, reducing need for external safety components. | Use Scenario: Galvanically isolating gate drive signals from MCU PWM outputs to IGBT/SiC half-bridge drivers in EV powertrain inverters. IC Role / Device Role / Timing Role: SI86S631BE-AS2 transmits three synchronized PWM channels across isolation barrier with 3.5 ns pulse width distortion to prevent shoot-through. Use Value: Maintains tight timing alignment between upper/lower gate drivers, improving inverter efficiency and thermal margin under 10 kHz switching. |
| Onboard Charger (OBC) | Industrial Motor Drive |
Use Scenario: Isolating communication lines (UART, SPI) and status feedback (overvoltage, overtemperature) between AC/DC stage controller and DC/DC stage in bidirectional OBC. IC Role / Device Role / Timing Role: SI86S631BE-AS2 carries isolated control and telemetry data at up to 150 Mbps with fail-safe default-low outputs during AC brownout. Use Value: Supports seamless transition between charging modes (AC fast, DC fast) without communication dropout or unsafe state transitions. | Use Scenario: Isolating encoder feedback, current sense signals, and enable commands between servo controller and motor power stage in CNC and robotics systems. IC Role / Device Role / Timing Role: SI86S631BE-AS2 delivers sub-10 ns propagation delay for position loop closure and 100 kV/µs CMTI immunity against IGBT switching noise. Use Value: Eliminates encoder glitches and current measurement errors caused by common-mode transients, improving positioning accuracy by >0.05%. |
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 data rate; 2.5 kVRMS isolation; no AEC-Q100 qualification; 30 ns propagation delay. | Targeted at industrial automation, not automotive-grade systems requiring reinforced insulation. | Choose ADUM3301ARWZ only for cost-sensitive non-automotive designs where 25 Mbps and 2.5 kVRMS suffice. |
| ISO6731FDWR | 3-channel, 50 Mbps max data rate; 5000 VRMS; AEC-Q100 Grade 1; 11 ns propagation delay; different pinout (SOIC-16 NB). | Valid for automotive BMS but lacks 6000 VRMS rating and 150 Mbps capability for next-gen OBCs. | ISO6731FDWR fits legacy automotive designs needing lower speed and narrower body, but SI86S631BE-AS2 is preferred for new 800 V platform integration. |
Compared with ADUM3301ARWZ and ISO6731FDWR, SI86S631BE-AS2 uniquely combines 150 Mbps speed, 6000 VRMS reinforced isolation, AEC-Q100 Grade 1, and 10 ns propagation delay-making it the only option qualified for high-voltage, high-bandwidth automotive power electronics where timing precision and safety certification are co-constrained.
Availability
SI86S631BE-AS2 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 SI86S631BE-AS2 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 automotive and industrial isolation applications demanding reinforced safety certification, ultra-low propagation delay, and immunity to fast transients-addressing limitations of optocouplers and earlier capacitive isolators.
FAQ
What is the isolation rating and safety certification status of SI86S631BE-AS2?
SI86S631BE-AS2 is rated for 6000 VRMS isolation per UL 1577 and certified to IEC 60747-17 (reinforced insulation). It holds pending CSA 62368-1 and 60601-1 approvals and CQC GB4943.1 certification. These ratings are validated for 1-minute withstand and support automotive BMS and OBC designs requiring reinforced insulation per ISO 26262.
Does SI86S631BE-AS2 require external startup initialization or configuration?
No, SI86S631BE-AS2 requires no startup initialization. Its RF-based on/off keying architecture enables immediate signal transmission after VDD exits UVLO (within 0.3 ms). Outputs follow inputs directly-no firmware handshake, register programming, or clock synchronization is needed, simplifying system boot sequences in traction inverters and OBCs.
How does the fail-safe mode operate on SI86S631BE-AS2, and how is it selected?
The fail-safe mode on SI86S631BE-AS2 determines output state (high or low) when VDD1 is unpowered but VDD2 remains active. This is fixed at manufacturing via ordering option ('B' = default low, 'E' = default high). SI86S631BE-AS2 uses the 'E' variant, so outputs default high during Side A undervoltage-ensuring safe deactivation of gate drivers in battery disconnect scenarios.
What are the supply bypass requirements for SI86S631BE-AS2?
SI86S631BE-AS2 requires two bypass capacitors per supply rail: 0.1 µF ceramic and 10 µF bulk capacitor placed as close as possible to VDD1/GND1 and VDD2/GND2 pins. This stabilizes RF transmitter/receiver operation and suppresses supply noise coupling across the isolation barrier-critical for maintaining 100 kV/µs CMTI performance in motor drive applications.
Can SI86S631BE-AS2 support bidirectional signal flow on its channels?
SI86S631BE-AS2 provides three unidirectional channels (A1→B1, A2→B2, A3→B3), but bidirectional operation is achievable using external logic to control EN1/EN2 and coordinate direction. For native bidirectional support, Skyworks offers the Si86SQ44 QSPI isolator. SI86S631BE-AS2 is optimized for dedicated forward-path isolation in BMS voltage monitoring and gate drive control.
SI86S631BE-AS2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 6000Vrms
- 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
SI86S631BE-AS2 FAQ
1.How can I place an order for SI86S631BE-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S631BE-AS2 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 SI86S631BE-AS2 reliable?
The price and inventory of SI86S631BE-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S631BE-AS2 is usually 5 days.
3.What payment methods are accepted for SI86S631BE-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S631BE-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S631BE-AS2?
SI86S631BE-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S631BE-AS2 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 SI86S631BE-AS2?
For technical support, including SI86S631BE-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S631BE-AS2 requirements.
6.How does Aetrix verify that SI86S631BE-AS2 is sourced from the original manufacturer or authorized distributors?
All SI86S631BE-AS2 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 SI86S631BE-AS2 meets industry standards.
7.What is the process for return or replacement of SI86S631BE-AS2?
All SI86S631BE-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI86S631BE-AS2, 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 SI86S631BE-AS2 part is unused and in its original packaging.
Return procedure for SI86S631BE-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S631BE-AS2 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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