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Skyworks Solutions Inc. SI8640BT-AS2R
- Part No.:
- SI8640BT-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8640BT-AS2R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,673
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Product details
Overview
SI8640BT-AS2R from Skyworks is a quad-channel, unidirectional digital isolator with 4-input/0-output channel configuration, 5 kVRMS reinforced isolation rating, and automotive-grade qualification (AEC-Q100). It operates from 2.5–5.5 V, supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and features selectable low-default fail-safe output mode. It is used in battery management systems and traction inverters requiring high-noise immunity and long-term reliability under –40°C to +125°C.
For engineers reviewing the SI8640BT-AS2R datasheet, SI8640BT-AS2R pinout, SI8640BT-AS2R application, or SI8640BT-AS2R equivalent, key selection criteria include its 5 kV reinforced VDE 0884-10 certification, 100 Mbps supply current of 5.5 mA per channel at 5 V, tri-state enable control, Schmitt-trigger inputs, and WB SOIC-16 package with 8 mm creepage for high-voltage system separation.
Technical Context
The SI8640BT-AS2R implements RF-based on/off keying across a silicon-dielectric isolation barrier-replacing optocoupler architectures with superior CMTI (>60 kV/µs), lower power, and no start-up initialization. Its four isolated channels are all input-side referenced (VDD1 side), with outputs on VDD2 side driven only by input logic states.
It integrates undervoltage lockout (UVLO) on both sides (VDDUV+ = 2.24 V typ), Schmitt-trigger inputs (VT+ = 1.67 V, VT– = 1.23 V), and a single EN pin controlling all four outputs. The fail-safe default-low behavior is hardwired per ordering option and remains active during VDD1 loss while VDD2 is powered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation per UL/VDE/CSA/CQC; enables use in mains-connected BMS and inverters without additional creepage barriers. |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and CAN FD signal isolation in automotive gate drivers and chargers. |
| Propagation Delay | 8.0 ns typical - ensures sub-10 ns timing alignment critical for synchronous motor control feedback loops. |
| Supply Current @ 100 Mbps | 5.5 mA per channel at 5 V - enables low-power operation in always-on vehicle subsystems without thermal derating. |
| Common-Mode Transient Immunity | 60 kV/µs minimum - maintains signal integrity during fast-switching IGBT transients in 800 V traction inverters. |
| Fail-Safe Default Output | Low state when VDD1 is unpowered - prevents undefined gate drive activation during MCU reset or brownout conditions. |
| Operating Temperature | –40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and battery-pack placement. |
Pinout & Package
SI8640BT-AS2R uses a 16-pin wide-body SOIC package (WB SOIC-16, -AS2 suffix), with 8 mm creepage distance enabled by tie-bar-free construction. Pin numbering follows standard SOIC layout (pin 1 = dot-marked corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to input logic, Schmitt triggers, and RF transmitter; must be bypassed with 0.1 µF capacitor. |
| GND1 | Input-side ground reference | Return path for VDD1; requires separate PCB plane from GND2 to maintain isolation barrier integrity. |
| IN1–IN4 | Digital input signals (side A) | CMOS-compatible inputs with Schmitt-trigger hysteresis (0.44 V typ); tolerate slow edges and noise up to 50 kV/µs. |
| VDD2 | Output-side power supply | Supplies output drivers and enables fail-safe output state retention during VDD1 loss. |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1; defines safety extra-low voltage (SELV) domain. |
| OUT1–OUT4 | Isolated digital outputs (side B) | Push-pull CMOS outputs (50 Ω typ impedance); support 4 mA sink/source; tri-stated when EN = low. |
| EN | Global output enable control | Active-high logic input on VDD2 side; disables all four outputs into high-impedance state when low. |
| NC | No-connect terminal | Pin 16 is internally unconnected; may be left floating, tied to VDD2, or grounded per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced VDE 0884-10 certification | Validated 10 kV surge capability and 5 kVRMS working voltage - eliminates need for external transient protection in EV charging interfaces. |
| Tri-state output enable (EN) | Single-pin control over all four outputs enables synchronized shutdown during system sleep or fault recovery. |
| Automotive-grade AEC-Q100 qualification | Full automotive process flow with zero-defect methodology - ensures <1 ppm field failure rate in 15-year vehicle lifetime applications. |
| Ultra-low power at high speed | 1.6 mA/channel @ 1 Mbps and 5.5 mA/channel @ 100 Mbps at 5 V - reduces thermal load in densely packed power modules. |
| Stable timing across temperature | Channel-to-channel skew ≤ 0.5 ns and propagation delay skew ≤ 2 ns from –40°C to +125°C - enables deterministic real-time control. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADC serial interface and pack-level communication lines in 400–800 V EV battery stacks. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting precision analog front-end data and status flags across high dv/dt domains. Use Value: 60 kV/µs CMTI prevents bit errors during switching transients; 5 kV reinforced rating satisfies IEC 62368-1 reinforced insulation requirements for functional safety. |
Use Scenario: Providing gate-drive signal isolation between MCU PWM outputs and SiC MOSFET half-bridge drivers in electric vehicle traction inverters. IC Role / Device Role / Timing Role: Delivering synchronized, low-skew PWM signals with <10 ns propagation delay to ensure shoot-through prevention. Use Value: 0.5 ns channel-channel skew and 2 ns propagation delay skew guarantee precise timing alignment across all four gate drivers. |
| On-Board Charger (OBC) | Industrial Motor Drive |
|
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC converter stages in bidirectional OBCs. IC Role / Device Role / Timing Role: Transmitting enable, fault, and synchronization signals across 1 kV+ potential differences with fail-safe low default. Use Value: Fail-safe low output prevents unintended charger activation during MCU boot or brownout; 150 Mbps supports fast fault reporting. |
Use Scenario: Isolating encoder feedback, current sense ADC, and safety torque-off (STO) signals in servo drives operating in noisy factory environments. IC Role / Device Role / Timing Role: Providing robust digital isolation for position loop closure and functional safety interlocks. Use Value: Schmitt-trigger inputs reject EMI from nearby VFDs; AEC-Q100 qualification ensures reliability in continuous industrial operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8640BB-AS | Same 4-channel, 5 kV, WB SOIC-16 package but rated for 2.5 kVRMS basic insulation (not reinforced); lacks VDE 0884-10 surge rating. | Suitable for non-safety-critical industrial I/O where reinforced insulation is not mandated. | Select SI8640BB-AS only if system-level certification does not require reinforced insulation per IEC 62368-1 or IEC 60601-1. |
| ADUM140D0BRWZ | 4-channel, 3.75 kVRMS, 150 Mbps, but uses iCoupler magnetic coupling; higher 9.5 ns max propagation delay; no integrated fail-safe default mode. | Used in legacy industrial PLCs where magnetic isolation heritage is preferred and external pull-down resistors can implement fail-safe. | Choose ADUM140D0BRWZ only if existing design already uses ADI's iCoupler ecosystem and board space allows for external biasing components. |
Compared with SI8640BB-AS, SI8640BT-AS2R provides certified reinforced insulation essential for automotive BMS and OBCs; compared with ADUM140D0BRWZ, it delivers lower skew, integrated fail-safe, and higher CMTI-making it preferable for time-critical EV powertrain applications.
Availability
SI8640BT-AS2R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and industrial motor drives requiring stable component supply across extended temperature and high-reliability automotive lifecycles.
Supply support for SI8640BT-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 for wireless, automotive, and industrial markets.
The Si864x family was designed specifically for high-reliability, high-noise immunity digital isolation in automotive electrification and industrial power systems-emphasizing reinforced safety certification, ultra-low power, and precise timing stability.
FAQ
What is the isolation rating and certification status of SI8640BT-AS2R?
SI8640BT-AS2R provides 5 kVRMS reinforced isolation and is certified to UL 1577, CSA Component Acceptance Notice 5A, VDE 0884-10 (reinforced), IEC 62368-1, and CQC GB4943.1. Its VDE 0884-10 certification includes 10 kV surge capability, making it suitable for automotive battery systems and industrial inverters requiring highest safety integrity.
Does SI8640BT-AS2R support fail-safe operation, and how is it configured?
Yes, SI8640BT-AS2R has a factory-configured fail-safe mode that defaults outputs to logic low when VDD1 is unpowered but VDD2 remains active. This behavior is fixed per part number and cannot be changed in-circuit. It ensures safe deactivation of downstream circuitry during MCU power loss or reset sequences.
What is the pin configuration and package type of SI8640BT-AS2R?
SI8640BT-AS2R uses a 16-pin wide-body SOIC package (-AS2 suffix) with 8 mm creepage, tie-bar-free construction. Pin 1 is marked with a dot; pins 1–8 are VDD1, GND1, IN1–IN4, and NC; pins 9–16 are VDD2, GND2, EN, and OUT1–OUT4. Full pinout is documented in Skyworks' Si864x datasheet Section 5.
How does the enable (EN) pin function on SI8640BT-AS2R?
The EN pin on SI8640BT-AS2R is an active-high control input on the VDD2 side. When EN = low, all four outputs (OUT1–OUT4) enter high-impedance state regardless of input states. When EN = high, outputs follow IN1–IN4. EN is internally pulled up, so it may be left floating-but tying it to VDD2 or GND is recommended in noisy environments.
Is SI8640BT-AS2R qualified for automotive applications, and what standards does it meet?
Yes, SI8640BT-AS2R is automotive-grade and AEC-Q100 qualified (Grade 1, –40°C to +125°C). It is manufactured using full automotive process flows with AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and zero-defect methodology-ensuring reliability for 15-year vehicle service life in BMS and traction inverter applications.
SI8640BT-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:
- Magnetic 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
SI8640BT-AS2R FAQ
1.How can I place an order for SI8640BT-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640BT-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 SI8640BT-AS2R reliable?
The price and inventory of SI8640BT-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640BT-AS2R is usually 5 days.
3.What payment methods are accepted for SI8640BT-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640BT-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640BT-AS2R?
SI8640BT-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640BT-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 SI8640BT-AS2R?
For technical support, including SI8640BT-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640BT-AS2R requirements.
6.How does Aetrix verify that SI8640BT-AS2R is sourced from the original manufacturer or authorized distributors?
All SI8640BT-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 SI8640BT-AS2R meets industry standards.
7.What is the process for return or replacement of SI8640BT-AS2R?
All SI8640BT-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8640BT-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 SI8640BT-AS2R part is unused and in its original packaging.
Return procedure for SI8640BT-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640BT-AS2R 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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