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Skyworks Solutions Inc. SI8641ED-AS2
- Part No.:
- SI8641ED-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8641ED-AS2.pdf
- Description:
- AUTOMOTIVE 5 KV 3 FORWARD & 1 RE
- Quantity:
- Payment:
- Shipping:
Inventory:2,875
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Product details
Overview
SI8641ED-AS2 from Skyworks is a quad-channel digital isolator with 3 input channels on VDD1 side and 1 output channel on VDD2 side, rated for 5 kVRMS reinforced isolation in wide-body SOIC-16 package. It supports DC–150 Mbps data rates, delivers <10 ns propagation delay, and features selectable high-default fail-safe mode for power-loss scenarios-used in battery management systems and isolated ADC interfaces.
For engineers reviewing the SI8641ED-AS2 datasheet, SI8641ED-AS2 pinout, SI8641ED-AS2 application, or SI8641ED-AS2 equivalent, this page provides verified functional partitioning (3:1 channel split), confirmed 5 kVRMS VDE 0884-10 certification, precise timing specs (0.5 ns channel skew), and automotive-grade AEC-Q100 qualification for traction inverter control and on-board charger designs.
Technical Context
The SI8641ED-AS2 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its dual-supply architecture (VDD1/VDD2) supports independent 2.5–5.5 V operation per side, with Schmitt-trigger inputs and tri-state outputs controlled by two dedicated enable pins (EN1 on Side A, EN2 on Side B).
Fail-safe behavior is hardware-defined at manufacture: SI8641ED-AS2 defaults to logic-high output when VDD1 is unpowered but VDD2 remains active. This matches its "ED" ordering code (high-default, 5 kV, automotive-grade) and enables safe gate-drive hold in motor control during input-side brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | 3 input channels (Side A), 1 output channel (Side B)-enables asymmetric signal routing for feedback + command isolation |
| Isolation Rating | 5 kVRMS reinforced insulation, certified to VDE 0884-10 and UL 1577-supports 8 mm creepage in wide-body SOIC-16 |
| Max Data Rate | 150 Mbps-sufficient for real-time PWM feedback in 20 kHz motor drives and isolated SPI clocking |
| Propagation Delay | 8 ns typical (max 13 ns)-ensures sub-cycle timing integrity in closed-loop control loops |
| Channel-Channel Skew | 0.5 ns typical-critical for synchronized sampling across isolated analog front-ends |
| Supply Voltage Range | 2.5–5.5 V per side-allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers |
| CMTI | 60 kV/µs minimum-prevents false triggering in high-dV/dt environments like IGBT switching nodes |
Pinout & Package
SI8641ED-AS2 uses a 16-pin wide-body SOIC package (package code -AS2) with 8 mm creepage, optimized for reinforced insulation in high-voltage industrial and automotive systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies 3-channel input side (A1–A3); must be ≥2.5 V for valid logic operation |
| GND1 | Input-side ground reference | Return path for VDD1 and all Side A signals; requires local 0.1 µF bypass |
| A1–A3 | Digital input terminals | 3-channel CMOS inputs with Schmitt trigger-rejects >0.44 V hysteresis noise |
| EN1 | Enable control for Side A outputs | Active-high; disables A1–A3 outputs to high-impedance when low-used for multiplexing |
| VDD2 | Output-side power supply | Supplies single output channel (B4) and EN2; independent of VDD1 |
| GND2 | Output-side ground reference | Isolated return for VDD2 and B4; maintains galvanic separation |
| B4 | Digital output terminal | Single CMOS output with 50 Ω nominal impedance-requires controlled-impedance trace termination |
| EN2 | Enable control for Side B output | Active-high; places B4 in high-Z when low-enables safe output disable during fault |
| NC | No-connect terminal | Pins 1, 9, 10, 16 are unconnected die pads-must remain floating or tied to GND/VDD per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced 5 kVRMS isolation | Meets VDE 0884-10 and IEC 62368-1 for functional safety in EV battery packs and inverters |
| Selectable high-default fail-safe | Guarantees B4 = high during VDD1 loss-maintains safe state in isolated gate driver enable paths |
| Tri-state outputs with dual EN pins | EN1 controls A1–A3; EN2 controls B4-enables independent channel gating for dynamic power management |
| Ultra-low power at 100 Mbps | 7.3 mA (VDD1) / 14.3 mA (VDD2) typ. at 5 V-reduces thermal load in sealed automotive modules |
| AEC-Q100 Grade 1 qualification | Rated for –40 °C to +125 °C ambient-validates reliability in under-hood traction inverter environments |
Applications
| Battery Management System (BMS) | Motor Control Feedback Loop |
|---|---|
Use Scenario: Isolating cell voltage monitoring and pack current sensing signals from MCU in high-voltage EV battery packs. IC Role / Device Role / Timing Role: SI8641ED-AS2 transmits three analog monitor signals (via isolated sigma-delta modulators) and one status flag across 500 VDC barrier. Use Value: 5 kVRMS rating and 60 kV/µs CMTI prevent corruption during pack-level fault transients; 0.5 ns skew ensures synchronized sampling of multi-cell data. | Use Scenario: Transmitting rotor position encoder signals and PWM gate commands between MCU and isolated gate driver in traction inverters. IC Role / Device Role / Timing Role: SI8641ED-AS2 carries 3-phase current feedback (A1–A3) and enables safe shutdown (B4) during overcurrent events. Use Value: High-default fail-safe forces B4 high to hold gate driver enabled during MCU brownout-preventing unintended IGBT turn-off and shoot-through. |
| On-Board Charger (OBC) | Isolated ADC Interface |
Use Scenario: Isolating AC line sensing, DC link voltage, and thermal monitoring in bidirectional OBCs operating up to 1000 VDC. IC Role / Device Role / Timing Role: SI8641ED-AS2 routes three primary-side measurements to secondary-side controller while maintaining reinforced insulation. Use Value: Wide-body SOIC-16 with 8 mm creepage meets IEC 62109 creepage requirements; 150 Mbps supports fast transient detection in grid-synchronization algorithms. | Use Scenario: Interfacing isolated delta-sigma ADCs (e.g., AMC130x) to host processor in medical imaging power supplies. IC Role / Device Role / Timing Role: SI8641ED-AS2 carries three ADC data lanes and one ready strobe (B4) across isolation barrier. Use Value: Sub-10 ns propagation delay preserves timing alignment between sampled data and clock edges; Schmitt inputs reject EMI from high-frequency transformer coupling. |
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 count and 5 kVRMS rating, but default-low fail-safe mode | Suitable where system requires active-low enable or reset assertion during power loss | Select SI8641BB-AS2 only if default-low behavior aligns with safety architecture-pinout and timing identical |
| ADUM2401ARWZ | 4-channel symmetrical (2:2), 2.5 kVRMS basic isolation, no AEC-Q100 qualification | Limited to industrial automation; not certified for automotive traction systems | Use ADUM2401ARWZ only in cost-sensitive non-automotive designs requiring full 4-channel symmetry |
Compared with SI8641ED-AS2, SI8641BB-AS2 offers identical packaging and timing but inverted fail-safe polarity-making it a drop-in replacement only when logic polarity is inverted in firmware. ADUM2401ARWZ lacks reinforced isolation and automotive qualification, requiring redesign for safety-critical EV applications.
Availability
SI8641ED-AS2 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply with automotive-grade lifecycle assurance.
Supply support for SI8641ED-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 designed specifically for high-reliability isolation in electric vehicle powertrain systems and industrial energy infrastructure-emphasizing AEC-Q100 compliance, reinforced safety certification, and ultra-low power at high data rates.
FAQ
What is the fail-safe default output state of SI8641ED-AS2?
The SI8641ED-AS2 is configured with a high-default fail-safe mode: when VDD1 is unpowered but VDD2 remains active, output B4 defaults to logic high. This behavior is fixed by the "ED" ordering code and cannot be changed in-circuit-it ensures safe hold states in gate driver enable paths during input-side brownout events.
Does SI8641ED-AS2 require external startup initialization?
No, SI8641ED-AS2 requires no startup initialization. Its RF-based isolation architecture achieves valid output within 40 µs of power application (tSU max), with outputs transitioning cleanly from undervoltage lockout to functional state. This eliminates boot-time delays in real-time motor control and battery protection algorithms.
What package type and creepage distance does SI8641ED-AS2 use?
SI8641ED-AS2 uses a 16-pin wide-body SOIC package with "-AS2" suffix, featuring 8 mm creepage distance achieved via tie-bar elimination. This meets reinforced insulation requirements for 5 kVRMS working voltage under IEC 60664-1 and is validated for use in EV battery enclosures and industrial inverters.
How does the enable functionality work on SI8641ED-AS2?
SI8641ED-AS2 has two independent enable inputs: EN1 controls the three Side A inputs (A1–A3), placing them in high-impedance when low; EN2 controls the single Side B output (B4). Both are active-high, internally pulled up, and support noise-immune operation when tied to external logic levels-enabling dynamic channel gating without external pull-ups.
Is SI8641ED-AS2 qualified for automotive applications?
Yes, SI8641ED-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. Its "-AS2" suffix denotes automotive-grade version with IMDS/CAMDS material declarations-certified for use in battery management systems and traction inverters.
SI8641ED-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
SI8641ED-AS2 FAQ
1.How can I place an order for SI8641ED-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8641ED-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 SI8641ED-AS2 reliable?
The price and inventory of SI8641ED-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8641ED-AS2 is usually 5 days.
3.What payment methods are accepted for SI8641ED-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8641ED-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8641ED-AS2?
SI8641ED-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8641ED-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 SI8641ED-AS2?
For technical support, including SI8641ED-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8641ED-AS2 requirements.
6.How does Aetrix verify that SI8641ED-AS2 is sourced from the original manufacturer or authorized distributors?
All SI8641ED-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 SI8641ED-AS2 meets industry standards.
7.What is the process for return or replacement of SI8641ED-AS2?
All SI8641ED-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8641ED-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 SI8641ED-AS2 part is unused and in its original packaging.
Return procedure for SI8641ED-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8641ED-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
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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