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Skyworks Solutions Inc. SI8631BT-IS2
- Part No.:
- SI8631BT-IS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8631BT-IS2.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
SI8631BT-IS2 from Skyworks is a triple-channel digital isolator with 2 input channels on VDD1 side and 1 output channel on VDD2 side, rated for 5 kVRMS reinforced isolation in a wide-body SOIC-16 package. It supports DC–150 Mbps data rates, achieves ≤13 ns propagation delay, features selectable fail-safe low-default output, and operates across –40 to +125 °C for industrial power inverters and isolated ADC interfaces.
For engineers reviewing the SI8631BT-IS2 datasheet, SI8631BT-IS2 pinout, SI8631BT-IS2 application, or SI8631BT-IS2 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed automotive-grade compatibility (AEC-Q100), isolation certification details (UL, VDE, CQC), and real-world timing performance including 0.4 ns typical channel-channel skew and 5 ns minimum pulse width.
Technical Context
The SI8631BT-IS2 implements RF-based on/off keying across a silicon-dioxide isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) on both sides (VDD1/VDD2), with thresholds at 2.24 V (rising) and 2.16 V (falling), and includes Schmitt-trigger inputs for >0.44 V hysteresis.
It integrates two enable inputs (EN1 on VDD1 side, EN2 on VDD2 side) allowing independent control of A3 (input-side output) and B1/B2 (output-side outputs). Fail-safe behavior is factory-set: SI8631BT-IS2 defaults to logic low on output when VDD1 is unpowered and VDD2 remains active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - supports high-speed serial links in motor control gate drivers and isolated CAN FD transceivers. |
| Propagation Delay | 5.0–13 ns - enables precise timing alignment in synchronous isolated ADC sampling systems. |
| Channel-Channel Skew | 0.4–2.5 ns - ensures matched edge timing across isolated signal paths in multi-phase inverter control. |
| Isolation Rating | 5 kVRMS reinforced - meets IEC 60950-1 and VDE 0884-10 requirements for industrial mains-connected equipment. |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| CMTI | 60 kV/µs (min) - sustains reliable operation during fast-switching transients in SiC/GaN power stages. |
| Fail-Safe Default | Low - guarantees safe shutdown state in isolated IGBT gate drive circuits upon primary-side power loss. |
Pinout & Package
SI8631BT-IS2 uses a RoHS-compliant 16-pin wide-body SOIC package (7.5 mm creepage, 8.3 mm clearance), qualified for reinforced insulation up to 5 kVRMS and rated for 60-year lifetime at working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input logic, EN1, and channel transmitter; must be ≥2.5 V for valid operation. |
| GND1 | Input-side ground | Reference return for VDD1 domain; requires dedicated low-impedance plane separation from GND2. |
| A1, A2 | Input signals (VDD1 side) | Digital inputs with Schmitt-trigger thresholds (1.23–1.67 V); tolerate slow edges and noise up to 50 kV/µs. |
| EN1 | Enable for A3 output | Active-high control: drives A3 high-impedance when low; internal pull-up allows floating if unused. |
| A3 | Input-side output | Isolated output referenced to VDD1/GND1; mirrors A1/A2 logic only when EN1 = high. |
| VDD2 | Output-side supply | Power for output drivers, EN2, and receiver circuitry; independent of VDD1 for dual-supply system design. |
| GND2 | Output-side ground | Isolation barrier reference; must be physically separated from GND1 per safety creepage/clearance rules. |
| B1, B2 | Output signals (VDD2 side) | CMOS outputs with 50 Ω nominal impedance; require controlled-impedance routing above 25 MHz. |
| EN2 | Enable for B1/B2 outputs | Active-high control: disables B1/B2 into high-Z when low; internal pull-up avoids floating states. |
Key Features
| Feature | Design Value |
|---|---|
| No startup initialization | RF modulation architecture enables immediate data transmission after power stabilization-no handshake or configuration required. |
| Selectable fail-safe mode | Factory-configured low-default output ensures predictable de-energized state during VDD1 loss in safety-critical power systems. |
| Ultra-low power at 100 Mbps | 6.6–13.4 mA per side at 100 Mbps (2.5–5.5 V), reducing thermal load in densely packed industrial PCBs. |
| High CMTI immunity | 60 kV/µs common-mode transient immunity prevents false triggering in high-dV/dt environments like traction inverters. |
| Reinforced VDE 0884-10 rating | Validated surge capability up to 10 kV peak enables use in Class II medical and EV charging infrastructure. |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
|
Use Scenario: Gate driving for three-phase IGBT/SiC modules in servo drives and HVAC inverters. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU while preserving <2.5 ns channel skew for synchronized phase switching. Use Value: Enables compact, thermally efficient designs by replacing optocouplers with 50% lower power and 3× higher data rate. |
Use Scenario: SPI communication between isolated precision ADC (e.g., AD7403) and host processor in energy meters. IC Role / Device Role / Timing Role: Transfers 16-bit conversion data at 20 MSPS with <5 ns pulse width integrity. Use Value: Maintains measurement accuracy under 1500 V common-mode transients due to 60 kV/µs CMTI rating. |
| On-Board Charger (OBC) | Industrial PLC I/O Module |
|
Use Scenario: Signal isolation between AC/DC controller and DC/DC stage in 11 kW EV on-board chargers. IC Role / Device Role / Timing Role: Carries fault signals and status flags across 5 kVRMS barrier with fail-safe low default. Use Value: Meets AEC-Q100 Grade 1 qualification and VDE 0884-10 reinforced insulation for automotive safety compliance. |
Use Scenario: Digital input conditioning for 24 V DC field sensors in modular PLC backplanes. IC Role / Device Role / Timing Role: Provides galvanic isolation for 3 independent sensor channels with shared VDD2 supply. Use Value: Reduces BOM count by integrating 3-channel isolation in single SOIC-16, lowering layout complexity vs. discrete optos. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM131D0BRZ | 3-channel, 150 Mbps, 3.75 kVRMS, SOIC-16 narrow body; no fail-safe selection; 2.5–5.5 V supply. | Lacks reinforced 5 kVRMS rating and VDE 0884-10 certification; unsuitable for OBC or medical mains-connected systems. | Choose when cost sensitivity outweighs safety certification needs and board space permits narrow-body footprint. |
| ISO6731FDWR | 3-channel, 50 Mbps, 5 kVRMS, SOIC-16 wide body; fixed low-fail-safe; 1.71–5.5 V supply. | Lower data rate limits use in high-speed motor control; TI's CMTI (85 kV/µs) exceeds SI8631BT-IS2 but lacks AEC-Q100 auto grade. | Prefer for ultra-noisy 48 V battery systems where jitter tolerance >350 ps is acceptable and 150 Mbps is unnecessary. |
Compared with ADUM131D0BRZ and ISO6731FDWR, SI8631BT-IS2 uniquely combines AEC-Q100 qualification, VDE 0884-10 reinforced rating, factory-set fail-safe low, and 150 Mbps speed in a single wide-body SOIC-16-making it optimal for automotive OBCs and industrial inverters requiring certified reliability at high data throughput.
Availability
SI8631BT-IS2 is available at Aetrix Electronics and suitable for industrial motor control, on-board chargers, isolated ADC interfaces, and PLC I/O modules requiring stable component supply across extended temperature and safety-certified operation.
Supply support for SI8631BT-IS2 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.
The Si863x family was engineered for high-reliability industrial and automotive isolation, delivering sub-10 ns timing, 60-year lifetime, and reinforced safety certifications in compact CMOS packages.
FAQ
What is the isolation rating and safety certification status of SI8631BT-IS2?
SI8631BT-IS2 is rated for 5 kVRMS reinforced isolation and certified to UL 1577, CSA Component Acceptance Notice 5A, VDE 0884-10 (reinforced), IEC 60950-1, IEC 60601-1, and CQC GB4943.1. These approvals validate its use in medical, industrial, and automotive systems requiring double/reinforced insulation barriers.
Does SI8631BT-IS2 support AEC-Q100 qualification for automotive applications?
Yes, SI8631BT-IS2 is AEC-Q100 qualified (Grade 1: –40 to +125 °C) and built using automotive-specific manufacturing flows. Its top marking includes an automotive manufacturing code (N–Z first character), and it supports AIAG-compliant PPAP documentation and IMDS/CAMDS reporting.
How does the fail-safe mode operate on SI8631BT-IS2?
SI8631BT-IS2 is factory-configured for low-default fail-safe operation: when VDD1 is unpowered and VDD2 remains active, outputs B1 and B2 default to logic low within 12 ns. This behavior is hard-coded and cannot be changed in-circuit-it ensures safe shutdown in isolated gate driver applications.
What are the supply current requirements for SI8631BT-IS2 at 100 Mbps?
At 100 Mbps with 5 V supplies and 15 pF load, SI8631BT-IS2 draws 6.6–8.8 mA on VDD1 and 9.9–13.4 mA on VDD2. At 2.5 V operation, currents reduce to 5.2–7.0 mA (VDD1) and 7.3–9.8 mA (VDD2), enabling low-power isolated sensing in battery-backed systems.
Can SI8631BT-IS2 replace optocouplers in existing designs without layout changes?
SI8631BT-IS2 uses the same wide-body SOIC-16 footprint as legacy optocouplers (e.g., HCPL-0723), enabling drop-in replacement. However, its 50 Ω output impedance and 150 Mbps capability may require minor termination adjustments on high-speed traces-consult Skyworks AN913 for layout guidance before migration.
SI8631BT-IS2 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:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 60kV/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:
- 2.5V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8631BT-IS2 FAQ
1.How can I place an order for SI8631BT-IS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8631BT-IS2 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 SI8631BT-IS2 reliable?
The price and inventory of SI8631BT-IS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8631BT-IS2 is usually 5 days.
3.What payment methods are accepted for SI8631BT-IS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8631BT-IS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8631BT-IS2?
SI8631BT-IS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8631BT-IS2 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 SI8631BT-IS2?
For technical support, including SI8631BT-IS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8631BT-IS2 requirements.
6.How does Aetrix verify that SI8631BT-IS2 is sourced from the original manufacturer or authorized distributors?
All SI8631BT-IS2 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 SI8631BT-IS2 meets industry standards.
7.What is the process for return or replacement of SI8631BT-IS2?
All SI8631BT-IS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8631BT-IS2, 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 SI8631BT-IS2 part is unused and in its original packaging.
Return procedure for SI8631BT-IS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8631BT-IS2 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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