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Skyworks Solutions Inc. SI8640BD-AS2
- Part No.:
- SI8640BD-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8640BD-AS2.pdf
- Description:
- AUTOMOTIVE 5 KV 4-CHANNEL DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
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Product details
Overview
SI8640BD-AS2 from Skyworks is a quad-channel, unidirectional digital isolator with 4-input/0-output channel configuration, 5 kVRMS reinforced isolation rating, and 150 Mbps data rate. It features Schmitt-trigger inputs, tri-state outputs with single enable control (EN), fail-safe low-default output state, and operates across –40 to 125 °C in wide-body SOIC-16 package. It is used in isolated gate drivers for traction inverters and battery management systems requiring high CMTI and long-term reliability.
For engineers reviewing the SI8640BD-AS2 datasheet, SI8640BD-AS2 pinout, SI8640BD-AS2 application, or SI8640BD-AS2 equivalent, this page delivers verified specifications, automotive-grade AEC-Q100 qualification, VDE 0884-10 reinforced insulation compliance, precise timing parameters (8 ns typical propagation delay, 0.5 ns channel skew), and real-world design context for high-voltage industrial and EV power systems.
Technical Context
The SI8640BD-AS2 implements RF-based on/off keying across a silicon-dielectric 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 2.24 V rising threshold and 70 mV hysteresis per supply rail.
All four channels reside on the input side (Side A), driving isolated outputs on Side B; EN is located on Side B and controls all four outputs simultaneously. The device uses internal pull-downs (2 µA) to enforce low-default behavior during power loss on VDD1, satisfying fail-safe requirements in motor control safety chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation (VDE 0884-10 certified, 10 kV surge capable) |
| Max Data Rate | 150 Mbps - supports high-speed SPI, isolated ADC interfaces, and PWM feedback loops |
| Propagation Delay | 8 ns typical - enables tight timing closure in fast-switching power converters |
| Channel-Channel Skew | 0.5 ns max - ensures synchronized sampling across multiple isolated sensor channels |
| CMTI | 60 kV/µs min - maintains signal integrity in noisy 1200 V SiC/GaN inverter environments |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V analog front-ends |
| Fail-Safe Default | Low output on VDD1 loss - prevents unintended gate turn-on in isolated IGBT/SiC driver stages |
Pinout & Package
SI8640BD-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 0 (–40 to 125 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and RF transmitter circuitry; UVLO active below 2.24 V |
| GND1 | Input-side ground reference | Return path for Side A; must be separated from GND2 by ≥8 mm creepage |
| INA1–INA4 | Input signals (Side A) | Schmitt-triggered, 1.67 V typical VT+; tolerant of slow-rising/noisy MCU GPIO |
| VDD2 | Output-side power supply | Supplies RF receiver and output drivers; independent UVLO monitoring |
| GND2 | Output-side ground reference | Isolated return for Side B; forms reinforced barrier with GND1 |
| EN | Enable control (Side B) | Active-high; drives all four outputs into high-impedance when low |
| OUTB1–OUTB4 | Isolated output signals (Side B) | 50 Ω nominal output impedance; compatible with 50 Ω PCB traces for >50 Mbps |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | No LED aging or temperature drift; 60-year lifetime at rated working voltage |
| Tri-state output control | Single EN pin disables all four outputs simultaneously - simplifies fault-handling in multi-phase inverters |
| Fail-safe low-default mode | Guaranteed logic-low output during VDD1 brownout - critical for safe shutdown in BMS and OBC |
| High CMTI (60 kV/µs) | Prevents false triggering in 1200 V SiC half-bridges with dV/dt > 50 V/ns |
| Automotive-grade construction | AEC-Q100 qualified, AIAG PPAP supported, IMDS/CAMDS listed - meets Tier-1 production traceability |
Applications
| Motor Control Systems | Battery Management Systems (BMS) |
|---|---|
|
Use Scenario: Isolating gate-drive signals between MCU and high-side IGBT/SiC FETs in 3-phase traction inverters. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator delivering synchronized PWM edges with <0.5 ns skew across phases. Use Value: Enables precise dead-time control and prevents shoot-through during fast switching at 100 kHz+ carrier frequencies. |
Use Scenario: Isolating cell voltage measurement data and balancing commands between battery monitor IC and MCU in 800 V packs. IC Role / Device Role / Timing Role: High-CMTI isolator preserving ADC sample timing integrity amid high dv/dt transients from contactor switching. Use Value: Eliminates measurement corruption during pack pre-charge and fault events, ensuring accurate SOC estimation. |
| On-Board Chargers (OBC) | Traction Inverters |
|
Use Scenario: Isolating feedback signals (voltage/current) from secondary-side controllers to primary-side DSP in bi-directional AC/DC converters. IC Role / Device Role / Timing Role: Low-propagation-delay isolator supporting 150 Mbps isolated communication for real-time current-loop correction. Use Value: Reduces control loop latency below 20 ns, improving dynamic response to grid disturbances and load steps. |
Use Scenario: Providing reinforced isolation for position encoder interfaces and resolver-to-digital converter (RDC) outputs in electric axle modules. IC Role / Device Role / Timing Role: Fail-safe low-default isolator ensuring zero torque command during MCU reset or power interruption. Use Value: Meets ASIL-B functional safety requirements for torque path integrity without external supervision circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8640BD-B-IS2 | Industrial-grade (–I suffix); identical electrical specs, package, and pinout; no AEC-Q100 or PPAP support | Lacks automotive qualification documentation and zero-defect manufacturing flow; suitable for non-automotive industrial inverters | Select SI8640BD-B-IS2 only if automotive traceability, IMDS, or PPAP is not required. |
| ADUM4402ARWZ | 4-channel, 5 kV RMS, 100 Mbps max; higher 12 ns propagation delay; 10 mA/channel @ 100 Mbps vs. 5.5 mA for SI8640BD-AS2 | Lower data rate limits use in high-speed SPI or fast PWM feedback; higher power increases thermal load in dense layouts | Choose ADUM4402ARWZ only if legacy Analog Devices ecosystem integration outweighs speed/power advantages of SI8640BD-AS2. |
Compared with SI8640BD-B-IS2, SI8640BD-AS2 adds automotive process controls and documentation without sacrificing performance; versus ADUM4402ARWZ, it delivers 50% higher data rate and 45% lower dynamic power at 100 Mbps-critical for thermally constrained EV power modules.
Availability
SI8640BD-AS2 is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and battery management systems requiring stable component supply under AEC-Q100 automotive qualification and reinforced 5 kVRMS isolation.
Supply support for SI8640BD-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, high-noise industrial and automotive power systems-delivering RF-based isolation with guaranteed lifetime, fail-safe defaults, and reinforced safety certifications.
FAQ
What is the isolation rating and certification status of SI8640BD-AS2?
SI8640BD-AS2 provides 5 kVRMS reinforced isolation and is certified to VDE 0884-10 (reinforced), UL 1577, CSA 5A, and CQC GB4943.1. It meets IEC 62368-1 and IEC 60601-1 for medical and industrial end-equipment compliance. The "-AS2" suffix confirms automotive-grade construction with 8 mm creepage in wide-body SOIC-16.
Does SI8640BD-AS2 support fail-safe operation during input power loss?
Yes. SI8640BD-AS2 is ordered with low-default fail-safe mode (per Table 1.1), meaning outputs go low when VDD1 is unpowered but VDD2 remains active. This behavior is enforced by internal 2 µA pull-downs on all output channels, ensuring safe shutdown in motor control and BMS applications.
What is the maximum data rate and propagation delay of SI8640BD-AS2?
SI8640BD-AS2 supports up to 150 Mbps with a typical propagation delay of 8 ns and maximum of 13 ns over –40 to 125 °C. Its 0.5 ns channel-channel skew and 2 ns propagation delay skew enable precise synchronization across all four isolated channels in high-speed control loops.
How does the EN pin function on SI8640BD-AS2?
The EN pin on SI8640BD-AS2 is located on the output side (Side B) and controls all four output drivers. When EN is high, outputs follow INA1–INA4; when EN is low, all outputs enter high-impedance state. This allows centralized fault handling-for example, disabling all gate drives during overcurrent detection in an inverter module.
Is SI8640BD-AS2 qualified for automotive applications?
Yes. SI8640BD-AS2 carries the "-A" automotive suffix and is fully AEC-Q100 qualified (Grade 0, –40 to 125 °C). It is manufactured using automotive-specific process flows, supported by AIAG-compliant PPAP documentation, and listed in IMDS and CAMDS-meeting Tier-1 supplier requirements for EV powertrain systems.
SI8640BD-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:
- 4/0
- 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
SI8640BD-AS2 FAQ
1.How can I place an order for SI8640BD-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640BD-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 SI8640BD-AS2 reliable?
The price and inventory of SI8640BD-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640BD-AS2 is usually 5 days.
3.What payment methods are accepted for SI8640BD-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640BD-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640BD-AS2?
SI8640BD-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640BD-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 SI8640BD-AS2?
For technical support, including SI8640BD-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640BD-AS2 requirements.
6.How does Aetrix verify that SI8640BD-AS2 is sourced from the original manufacturer or authorized distributors?
All SI8640BD-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 SI8640BD-AS2 meets industry standards.
7.What is the process for return or replacement of SI8640BD-AS2?
All SI8640BD-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8640BD-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 SI8640BD-AS2 part is unused and in its original packaging.
Return procedure for SI8640BD-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640BD-AS2 Tags
-
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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