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Skyworks Solutions Inc. SI8641BD-AS2
- Part No.:
- SI8641BD-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8641BD-AS2.pdf
- Description:
- AUTOMOTIVE 5 KV 3 FORWARD & 1 RE
- Quantity:
- Payment:
- Shipping:
Inventory:4,702
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Product details
Overview
SI8641BD-AS2 from Skyworks is a quad-channel digital isolator with 3 input channels on VDD1 side and 1 output channel on VDD2 side, providing reinforced 5 kVRMS isolation in a wide-body SOIC-16 package. It supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and features selectable fail-safe low-default output state for power-loss scenarios-used in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8641BD-AS2 datasheet, SI8641BD-AS2 pinout, SI8641BD-AS2 application, or SI8641BD-AS2 equivalent, key selection criteria include its 5 kVRMS reinforced insulation rating (VDE 0884-10), tri-state enable control per side, Schmitt-trigger noise immunity, and automotive-grade AEC-Q100 qualification for traction inverter feedback loops.
Technical Context
The SI8641BD-AS2 implements RF-based on/off keying across a silicon dioxide isolation barrier, eliminating startup initialization and enabling robust operation across –40°C to +125°C. Its architecture delivers precise timing with ≤0.5 ns channel-channel skew and ≤2 ns propagation delay skew between sides.
It integrates independent undervoltage lockout (UVLO) monitors on both VDD1 and VDD2 supplies, with 70 mV hysteresis and 2.24 V typical UVLO+ threshold. The device supports dual enable inputs (EN1 on VDD1 side, EN2 on VDD2 side) for independent tri-state control of input and output channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation (VDE 0884-10 certified); enables direct interface with 690 VAC motor drives and Class I medical equipment. |
| Max Data Rate | 150 Mbps; supports high-speed SPI, RS-485 transceiver control, and real-time ADC sampling clock isolation. |
| Propagation Delay | 8 ns typical; ensures sub-10 ns timing alignment critical for PWM dead-time monitoring in inverters. |
| Channel Configuration | 3-input / 1-output split (VDD1 side: A1–A3; VDD2 side: B1); matches asymmetric control-to-feedback signal routing in isolated DC-DC controllers. |
| Supply Voltage Range | 2.5–5.5 V on both sides; allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Fail-Safe Default | Low-output during VDD1 loss; prevents unintended gate turn-on in IGBT/SiC driver stages when primary-side power fails. |
| CMTI | 60 kV/µs minimum; suppresses false triggering in high-dv/dt environments like traction inverter half-bridges. |
Pinout & Package
SI8641BD-AS2 is housed in a RoHS-compliant wide-body SOIC-16 package (8 mm creepage, -IS2 variant), rated for 5 kVRMS reinforced insulation and qualified to AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power source for A1–A3 inputs and EN1; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 | Input-side ground | Reference for A1–A3 and EN1; requires separate low-impedance plane from GND2 to maintain isolation integrity. |
| A1–A3 | Input channels | Digital signals isolated from VDD1 domain; Schmitt-trigger inputs tolerate >500 mV hysteresis for noisy industrial bus lines. |
| EN1 | Input-side enable | Active-high control for A1–A3 outputs; when low, forces A1–A3 into high-impedance state-enables multiplexed sensor readout. |
| VDD2 | Output-side supply | Power source for B1 output and EN2; independent regulation allows galvanic separation from VDD1. |
| GND2 | Output-side ground | Reference for B1 and EN2; physically separated by ≥8 mm creepage from GND1 per safety standards. |
| B1 | Output channel | Isolated replica of selected A-input; drives 50 Ω transmission lines directly due to matched 50 Ω output impedance. |
| EN2 | Output-side enable | Active-high control for B1; when low, places B1 in high-impedance-supports shared-bus arbitration in isolated CAN/FlexRay nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced VDE 0884-10 certification | Validated 10 kV surge capability and 60-year lifetime at 5 kVRMS working voltage-meets IEC 60601-1 and IEC 62368-1 system requirements. |
| Tri-state enable per side | Independent EN1 and EN2 pins allow dynamic channel gating on each domain-reduces EMI during idle periods in motor phase current sensing. |
| Ultra-low power at 100 Mbps | 7.3 mA (VDD1) / 14.3 mA (VDD2) typical at 100 Mbps and 5 V-enables thermally constrained designs in sealed battery enclosures. |
| Precision timing performance | 0.5 ns channel-channel skew and 2 ns propagation delay skew ensure deterministic sampling of synchronized encoder and current feedback signals. |
| AEC-Q100 Grade 1 qualification | Qualified for automotive applications from –40°C to +125°C ambient; includes PPAP documentation and IMDS/CAMDS compliance support. |
Applications
| Motor Control Feedback Isolation | Battery Management System (BMS) Cell Monitoring |
|---|---|
|
Use Scenario: Isolating phase current sense signals and encoder quadrature outputs from MCU in 400 V EV traction inverters. IC Role / Device Role / Timing Role: SI8641BD-AS2 transmits three current-sense ADC outputs (A1–A3) and gates one encoder channel (B1) with <10 ns delay matching to preserve commutation timing. Use Value: 5 kVRMS reinforced isolation withstands 690 VAC bus transients; 60 kV/µs CMTI prevents false triggers during IGBT switching. |
Use Scenario: Transmitting cell voltage and temperature readings from high-side monitoring ICs to isolated MCU in 800 V BEV battery packs. IC Role / Device Role / Timing Role: SI8641BD-AS2 carries three cell voltage samples (A1–A3) and enables one diagnostic flag (B1) under EN2 control during fault conditions. Use Value: Fail-safe low-default output prevents erroneous cell disconnect commands during primary-side brownout; AEC-Q100 ensures reliability over 15-year vehicle life. |
| Isolated DC-DC Controller Interface | Traction Inverter Gate Driver Interface |
|
Use Scenario: Coupling PWM commands and fault signals between primary-side controller and secondary-side isolated DC-DC converter in server PSUs. IC Role / Device Role / Timing Role: SI8641BD-AS2 routes three PWM edges (A1–A3) and returns one isolated fault flag (B1) with sub-10 ns skew to maintain tight loop stability. Use Value: 150 Mbps capability supports multi-phase interleaved control; 2.5–5.5 V dual supply accommodates 3.3 V controller and 5 V gate driver rails. |
Use Scenario: Delivering isolated gate drive enable/disable and DESAT feedback from SiC half-bridge drivers to MCU in hybrid electric vehicle inverters. IC Role / Device Role / Timing Role: SI8641BD-AS2 conveys three gate enable signals (A1–A3) and one DESAT alert (B1), with EN1/EN2 enabling fast shutdown sequencing. Use Value: Tri-state outputs prevent shoot-through during power-up; 8 mm creepage meets reinforced insulation requirements for 800 V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641BB-AS2 | Same 3/1 channel split and 5 kVRMS rating, but default output state is low only at 2.5 kVRMS isolation; lacks VDE 0884-10 reinforced certification. | Suitable for industrial inverters where 2.5 kVRMS suffices and UL/CSA basic insulation meets end-equipment standards. | Select SI8641BB-AS2 only if system-level safety certification does not require VDE 0884-10 reinforced insulation. |
| ADUM1401ARWZ | 4-channel symmetrical (2/2) configuration, 2.5 kVRMS, no selectable fail-safe mode, higher 12 ns max propagation delay. | Applicable in legacy industrial PLC I/O modules where channel symmetry and lower cost outweigh precision timing needs. | Choose ADUM1401ARWZ when replacing existing designs with identical pinout and no requirement for 5 kVRMS or fail-safe control. |
Compared with SI8641BB-AS2, SI8641BD-AS2 provides certified reinforced insulation essential for automotive traction systems; versus ADUM1401ARWZ, it delivers tighter timing, higher isolation, and configurable fail-safe behavior-making it optimal for next-generation EV power electronics.
Availability
SI8641BD-AS2 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and isolated DC-DC controllers requiring stable component supply across automotive and industrial production programs.
Supply support for SI8641BD-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.
The Si864x family was engineered for high-reliability signal isolation in automotive, industrial, and medical systems-delivering ultra-low power, precise timing, and safety-certified reinforced insulation without optical or magnetic compromises.
FAQ
What is the isolation rating and certification status of SI8641BD-AS2?
SI8641BD-AS2 provides 5 kVRMS reinforced isolation certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1. It supports 10 kV surge capability and is rated for 60-year lifetime at full working voltage-meeting IEC 60601-1 for medical and IEC 62368-1 for industrial end-equipment.
How does the fail-safe mode operate in SI8641BD-AS2?
SI8641BD-AS2 is configured at manufacture for low-default output during VDD1 loss. When input-side power fails, B1 transitions to logic low within 12 ns (tSD), preventing unintended activation of downstream circuits such as IGBT gate drivers in motor control applications.
What are the enable pin functions on SI8641BD-AS2?
SI8641BD-AS2 has two independent enable inputs: EN1 controls tri-state behavior of A1–A3 outputs on the VDD1 side, while EN2 controls B1 on the VDD2 side. Both are active-high, internally pulled up, and support fast enable-to-data valid timing (6 ns typical).
Does SI8641BD-AS2 support AEC-Q100 qualification?
Yes, SI8641BD-AS2 is AEC-Q100 Grade 1 qualified (–40°C to +125°C), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings-validating its use in battery electric vehicle powertrain systems.
What package type and creepage distance does SI8641BD-AS2 use?
SI8641BD-AS2 uses the wide-body SOIC-16 package with -IS2 suffix, featuring 8 mm creepage distance and reinforced insulation structure. This package maintains standard SOIC land patterns while enabling 5 kVRMS isolation-critical for high-voltage automotive and industrial applications.
SI8641BD-AS2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- 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:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- 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
SI8641BD-AS2 FAQ
1.How can I place an order for SI8641BD-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8641BD-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 SI8641BD-AS2 reliable?
The price and inventory of SI8641BD-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8641BD-AS2 is usually 5 days.
3.What payment methods are accepted for SI8641BD-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8641BD-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8641BD-AS2?
SI8641BD-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8641BD-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 SI8641BD-AS2?
For technical support, including SI8641BD-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8641BD-AS2 requirements.
6.How does Aetrix verify that SI8641BD-AS2 is sourced from the original manufacturer or authorized distributors?
All SI8641BD-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 SI8641BD-AS2 meets industry standards.
7.What is the process for return or replacement of SI8641BD-AS2?
All SI8641BD-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8641BD-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 SI8641BD-AS2 part is unused and in its original packaging.
Return procedure for SI8641BD-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8641BD-AS2 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.
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
Texas Instruments
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