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Skyworks Solutions Inc. SI8641ED-AS2R
- Part No.:
- SI8641ED-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8641ED-AS2R.pdf
- Description:
- AUTOMOTIVE 5 KV 3 FORWARD & 1 RE
- Quantity:
- Payment:
- Shipping:
Inventory:1,956
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Product details
Overview
SI8641ED-AS2R from Skyworks is a quad-channel digital isolator with 3 input channels on VDD1 side and 1 output channel on VDD2 side, 5 kVRMS reinforced isolation rating, 150 Mbps data rate, and selectable high-default fail-safe mode. It operates across –40 to 125 °C and supports 2.5–5.5 V dual supplies, enabling robust signal isolation in battery management systems and traction inverters.
For engineers reviewing the SI8641ED-AS2R datasheet, SI8641ED-AS2R pinout, SI8641ED-AS2R application, or SI8641ED-AS2R equivalent, key selection criteria include its 5 kVRMS wide-body SOIC-16 isolation rating, tri-state enable control per side, Schmitt-trigger noise immunity, and AEC-Q100 qualification for automotive powertrain use.
Technical Context
The SI8641ED-AS2R implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and delivering stable timing across temperature. Its architecture provides independent undervoltage lockout (UVLO) on both sides, with VDDUV+ = 2.24 V (typ) and hysteresis of 70 mV (typ).
It features two enable inputs (EN1 on VDD1 side controlling A4; EN2 on VDD2 side controlling B1–B3), supporting side-specific tri-state control. The default output state is high during power loss-a factory-configured fail-safe behavior confirmed for the "ED" ordering variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels & Direction | 3-input / 1-output asymmetric configuration (A1–A3 → B1–B3; A4 ← B4) |
| Isolation Rating | 5 kVRMS reinforced insulation (VDE 0884-10 certified, 8 mm creepage) |
| Max Data Rate | 150 Mbps - supports high-speed CAN FD, SPI, and PWM feedback loops |
| Propagation Delay | 8 ns (typ) - enables sub-10 ns timing-critical gate drive isolation |
| Supply Range | 2.5–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V analog domains |
| CMTI | 60 kV/µs (typ) - sustains reliable operation in high-dV/dt motor inverter environments |
| Fail-Safe Default | High - ensures safe deactivation of downstream drivers during input-side power loss |
Pinout & Package
SI8641ED-AS2R uses a 16-pin wide-body SOIC package (package code -AS2), with 8 mm creepage achieved via tie-bar-free construction while maintaining standard SOIC-16 land pattern compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channels A1–A4 and EN1; must be ≥2.5 V for valid logic operation |
| GND1 | Input-side ground | Reference return for VDD1 and all A-side signals; requires dedicated low-impedance plane |
| A1–A3 | Input data channels | CMOS/Schmitt-trigger inputs driving isolated outputs B1–B3; tolerate 0–5.5 V swing |
| A4 | Input channel with EN1 control | Signal path enabled only when EN1 = high; otherwise B4 remains in high-impedance state |
| EN1 | Enable for A4→B4 | Active-high control on VDD1 side; internally pulled up, may float but recommended tied externally in noisy environments |
| VDD2 | Output-side supply | Power for outputs B1–B4 and EN2; independent of VDD1 for true galvanic separation |
| GND2 | Output-side ground | Isolated reference for VDD2 and B-side signals; no electrical connection to GND1 |
| B1–B3 | Output data channels | 50 Ω nominal output impedance; require controlled-impedance routing for >50 Mbps operation |
| B4 | Output channel with EN2 control | Driven only when EN2 = high; defaults to high state during VDD1 loss (fail-safe ED variant) |
| EN2 | Enable for B1–B3 | Active-high control on VDD2 side; enables/disables B1–B3 simultaneously; internal pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced 5 kVRMS isolation | Meets VDE 0884-10 and UL 1577; certified for reinforced insulation in EV traction inverters |
| Tri-state enable per side | EN1 controls B4; EN2 controls B1–B3 - enables dynamic channel gating without PCB redesign |
| High-default fail-safe | Guaranteed logic-high output on B1–B4 during VDD1 undervoltage - prevents unintended actuation in BMS fault states |
| Ultra-low power at 100 Mbps | 14.3 mA (typ) on VDD2 side at 5 V - reduces thermal load in densely packed automotive modules |
| 0.5 ns channel-channel skew | Enables precise multi-phase timing in motor control where phase alignment ≤1 ns is critical |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADC interfaces and pack contactor control signals in 800 V EV battery packs. IC Role / Device Role / Timing Role: SI8641ED-AS2R transmits precision analog front-end data and safety-critical contactor commands across 5 kVRMS barrier with <8 ns propagation delay. Use Value: Reinforced 5 kVRMS rating satisfies IEC 62368-1 and GB4943.1 requirements for functional insulation in Class III equipment. |
Use Scenario: Transmitting PWM gate drive signals and current-sense feedback from IGBT/SiC half-bridges to MCU in high-power inverters. IC Role / Device Role / Timing Role: SI8641ED-AS2R delivers 150 Mbps data rate and 60 kV/µs CMTI to maintain signal integrity amid 5 kV/µs switching transients. Use Value: 0.5 ns channel-channel skew ensures synchronized gate timing across parallel inverter legs, minimizing shoot-through risk. |
| On-Board Charger (OBC) | Charging Station Interface |
|
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC converter in bidirectional OBCs. IC Role / Device Role / Timing Role: SI8641ED-AS2R provides asymmetric 3:1 channel mapping to handle multiple sensor inputs and single feedback loop output. Use Value: Selectable high-default fail-safe ensures gate drivers disable safely during primary-side brownout events. |
Use Scenario: Interfacing communication protocols (CAN, RS-485) and safety interlock signals between charging station controller and vehicle coupler. IC Role / Device Role / Timing Role: SI8641ED-AS2R isolates CAN TX/RX and door-lock status lines using shared VDD2 supply and independent EN2 control. Use Value: AEC-Q100 Grade 0 qualification (-40 to 125 °C) guarantees reliability under outdoor thermal cycling and humidity exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-AS | Same 5 kVRMS rating and high-default fail-safe, but uses standard wide-body SOIC (-AS) instead of tie-bar-free -AS2 package; 7.5 mm creepage vs. 8 mm | Suitable for non-IEC 62368-1-reinforced designs where 7.5 mm creepage suffices | Select SI8641ED-AS2R when 8 mm creepage is mandated by end-equipment safety certification. |
| ADUM4401BRIZ | 4-channel symmetrical (2/2), 5 kVRMS, but only 25 Mbps max rate and no selectable fail-safe default (fixed low) | Limited to lower-speed industrial PLC I/O; cannot replace SI8641ED-AS2R in 100+ Mbps automotive timing paths | Choose ADUM4401BRIZ only for cost-sensitive, non-automotive applications requiring basic isolation without high-speed or fail-safe requirements. |
Compared with SI8641ED-AS and ADUM4401BRIZ, SI8641ED-AS2R uniquely combines 8 mm creepage, 150 Mbps speed, and factory-configured high-fail-safe behavior-making it the only option qualified for AEC-Q100 Grade 0 traction inverter gate drive isolation.
Availability
SI8641ED-AS2R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and charging station interfaces requiring stable component supply across automotive production lifecycles.
Supply support for SI8641ED-AS2R 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 automotive and industrial isolation-delivering reinforced 5 kVRMS safety, AEC-Q100 qualification, and ultra-low power consumption in harsh thermal environments.
FAQ
What is the isolation rating and certification status of SI8641ED-AS2R?
SI8641ED-AS2R provides 5 kVRMS reinforced isolation and is certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1 standards. Its -AS2 package achieves 8 mm creepage via tie-bar-free construction, meeting IEC 62368-1 requirements for reinforced insulation in EV power systems. SI8641ED-AS2R is fully qualified for automotive use under AEC-Q100 Grade 0.
How does the fail-safe default output behavior work on SI8641ED-AS2R?
SI8641ED-AS2R is an "ED" variant, meaning it defaults to logic-high output on all channels (B1–B4) when VDD1 is unpowered or below UVLO threshold. This behavior is factory-configured and ensures safe shutdown of downstream drivers during input-side power loss-critical in battery management and inverter safety architectures. The default state is not software-controllable.
What are the enable pin functions for SI8641ED-AS2R?
SI8641ED-AS2R has two independent enable inputs: EN1 (on VDD1 side) controls output B4, and EN2 (on VDD2 side) controls outputs B1–B3. Both are active-high with internal pull-ups. When disabled, the respective outputs enter high-impedance state-enabling dynamic channel gating without affecting other isolated paths. EN1/EN2 may be left floating but are recommended tied externally in noisy environments.
Does SI8641ED-AS2R support 2.5 V operation on both sides?
Yes, SI8641ED-AS2R supports 2.5–5.5 V on both VDD1 and VDD2 supplies independently. At 2.5 V and 100 Mbps, typical supply current is 3.5 mA per channel on VDD2 side. Its wide supply range allows direct interfacing with 2.5 V FPGAs, 3.3 V MCUs, and 5 V analog subsystems without level-shifting circuitry.
What is the channel configuration of SI8641ED-AS2R and how is it used in asymmetric interfaces?
SI8641ED-AS2R has a 3-input / 1-output asymmetric configuration: A1–A3 drive B1–B3, while A4 drives B4. This matches common automotive signal topologies-e.g., three-phase current sense inputs feeding a single fault-reporting output, or three PWM inputs controlling one status LED. The asymmetry eliminates wasted channels and reduces BOM count versus symmetrical 4/0 or 2/2 isolators.
SI8641ED-AS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-AS2R FAQ
1.How can I place an order for SI8641ED-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8641ED-AS2R 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-AS2R reliable?
The price and inventory of SI8641ED-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8641ED-AS2R is usually 5 days.
3.What payment methods are accepted for SI8641ED-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8641ED-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8641ED-AS2R?
SI8641ED-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8641ED-AS2R 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-AS2R?
For technical support, including SI8641ED-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8641ED-AS2R requirements.
6.How does Aetrix verify that SI8641ED-AS2R is sourced from the original manufacturer or authorized distributors?
All SI8641ED-AS2R 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-AS2R meets industry standards.
7.What is the process for return or replacement of SI8641ED-AS2R?
All SI8641ED-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8641ED-AS2R, 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-AS2R part is unused and in its original packaging.
Return procedure for SI8641ED-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8641ED-AS2R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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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
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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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