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Skyworks Solutions Inc. SI8642BD-AS2R
- Part No.:
- SI8642BD-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642BD-AS2R.pdf
- Description:
- AUTOMOTIVE 5 KV 2 FORWARD & 2 RE
- Quantity:
- Payment:
- Shipping:
Inventory:2,337
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Product details
Overview
SI8642BD-AS2R from Skyworks is a quad-channel, 2-input/2-output digital isolator with reinforced 5 kVRMS isolation, 150 Mbps data rate, <10 ns propagation delay, and fail-safe low-default output mode. It operates from 2.5–5.5 V on both sides and is used in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8642BD-AS2R datasheet, SI8642BD-AS2R pinout, SI8642BD-AS2R application, or SI8642BD-AS2R equivalent, key selection criteria include its wide-body SOIC-16 package with 8 mm creepage, AEC-Q100 qualification, tri-state enable control per side, and precise timing (0.5 ns channel-channel skew, 2 ns propagation delay skew).
Technical Context
The SI8642BD-AS2R implements RF-based on/off keying across a silicon dioxide isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its dual-enable architecture (EN1 for channels A3/A4, EN2 for B1/B2) supports independent tri-state control of each side's outputs.
It features Schmitt-trigger inputs (0.44 V typical hysteresis), 50 Ω nominal output impedance, and undervoltage lockout (UVLO) with 70 mV hysteresis on both VDD1 and VDD2. The device maintains stable timing (±1.5 ns pulse width distortion) and CMTI ≥60 kV/µs across –40 to 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed SPI, RS-485, and CAN FD isolation without external clock conditioning. |
| Propagation Delay | 5.0–13.0 ns - enables sub-20 ns round-trip latency in closed-loop motor control feedback paths. |
| Channel-Channel Skew | 0.4–2.5 ns - ensures tight timing alignment across all four channels for synchronized PWM or ADC sampling. |
| Isolation Rating | 5 kVRMS reinforced - meets IEC 62368-1 and VDE 0884-10 for primary-side/secondary-side separation in EV traction inverters. |
| Supply Voltage | 2.5–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without level-shifting. |
| Fail-Safe Output | Default Low - guarantees safe deactivation of power stage MOSFETs during input-side power loss in BMS applications. |
| CMTI | ≥60 kV/µs - suppresses false triggering in high-dv/dt environments like SiC-based inverters. |
Pinout & Package
SI8642BD-AS2R uses a 16-pin wide-body SOIC package (–IS2 variant) with 8 mm creepage distance, RoHS-compliant, and JEDEC-standard 260 °C reflow profile. Pin numbering follows standard SOIC-16 convention with GND1/VDD1 on left side and GND2/VDD2 on right side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | VDD1, GND1, IN1, IN2 | Side A power and two digital inputs - connect to MCU GPIO or sensor interface with local 0.1 µF bypass capacitor. |
| 5, 6, 7, 8 | EN1, A3, A4, GND1 | Enable for outputs A3/A4 and dedicated output pins - EN1 = L forces A3/A4 into high-impedance state for dynamic channel gating. |
| 9, 10, 11, 12 | VDD2, GND2, B1, B2 | Side B power and two digital outputs - drive gate drivers or isolated ADCs; VDD2 must be independently regulated. |
| 13, 14, 15, 16 | EN2, B1, B2, GND2 | Enable for outputs B1/B2 and duplicate output pins - EN2 = L disables B1/B2 while preserving A3/A4 operation. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; enables 60-year life at rated working voltage with no calibration required. |
| Dual independent enable inputs | EN1 and EN2 allow selective shutdown of either side's outputs without affecting the other - critical for fault-containment in redundant power systems. |
| Reinforced 5 kVRMS insulation | Validated to VDE 0884-10 and UL 1577 - supports single-package isolation in Class I medical and EV traction inverter primary/secondary boundaries. |
| Low-power operation | 11 mA total (2.5 V, 100 Mbps) - reduces thermal load in densely packed BMS modules and extends battery runtime in portable test equipment. |
| Automotive-grade construction | AEC-Q100 qualified with AIAG PPAP documentation and IMDS/CAMDS compliance - meets Tier-1 supplier traceability and material disclosure requirements. |
Applications
| Motor Control Feedback Isolation | Battery Management System Interface |
|---|---|
Use Scenario: Isolating encoder signals and current-sense ADC outputs from MCU in 400 V–800 V inverter drives. IC Role / Device Role / Timing Role: Quad-channel isolator providing separate paths for PWM gate signals (A3/A4), feedback pulses (B1/B2), and independent enable control per side. Use Value: 0.5 ns channel-channel skew preserves phase accuracy in field-oriented control; 5 kVRMS rating eliminates need for additional isolation barriers. | Use Scenario: Interfacing cell monitor ICs (e.g., BQ796xx) to host MCU across isolation boundary in EV battery packs. IC Role / Device Role / Timing Role: Bidirectional signal isolator with 2:2 channel split, supporting simultaneous voltage/temperature readback and command transmission. Use Value: Fail-safe low-default output prevents unintended cell balancing activation during MCU reset or brownout events. |
| Industrial PLC Digital I/O Module | Isolated Switch-Mode Power Supply Control |
Use Scenario: Providing galvanic isolation between 24 V field-side digital inputs and 3.3 V logic-side FPGA in modular I/O cards. IC Role / Device Role / Timing Role: Input-side isolator with Schmitt-trigger inputs (0.44 V hysteresis) rejecting EMI from solenoid loads and long cable runs. Use Value: 60 kV/µs CMTI prevents spurious toggling in factory-floor environments with variable-frequency drives and welding equipment. | Use Scenario: Isolating feedback signals (voltage/current sense) and PWM commands between primary-side controller and secondary-side synchronous rectifier in LLC resonant converters. IC Role / Device Role / Timing Role: High-speed bidirectional isolator enabling 150 Mbps communication for adaptive dead-time control and real-time fault reporting. Use Value: <10 ns propagation delay minimizes loop latency, improving transient response and efficiency at >1 MHz switching frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 4-channel, 2/2 split, 25 Mbps max, 2.5–5.5 V, 2.5 kVRMS basic isolation | Lacks reinforced 5 kVRMS rating and AEC-Q100 qualification; not suitable for automotive BMS or EV inverters | Select when cost sensitivity outweighs safety certification needs in industrial PLCs with <1 kV working voltage. |
| ISO6742QDWR | 4-channel, 2/2 split, 50 Mbps max, 2.25–5.5 V, 5 kVRMS reinforced, automotive grade | Lower data rate limits use in high-speed SPI or fast ADC interfaces; no selectable fail-safe default output | Choose for TI-ecosystem designs requiring pin-compatible replacement where 50 Mbps suffices and default output state is managed externally. |
Compared with ADUM2402BRWZ and ISO6742QDWR, SI8642BD-AS2R uniquely combines 150 Mbps speed, AEC-Q100 qualification, fail-safe low-default output, and 5 kVRMS reinforced isolation in a single wide-body SOIC package-making it optimal for next-generation EV powertrain and high-reliability industrial control.
Availability
SI8642BD-AS2R is available at Aetrix Electronics and suitable for battery management systems, motor control inverters, and isolated power supply designs requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI8642BD-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 is designed for high-reliability signal isolation in automotive, industrial, and medical systems-delivering ultra-low power, precise timing, and safety-certified reinforcement without optical limitations.
FAQ
What is the isolation rating and certification status of SI8642BD-AS2R?
SI8642BD-AS2R provides 5 kVRMS reinforced isolation and is certified to UL 1577, CSA Component Notice 5A, VDE 0884-10 (reinforced), IEC 62368-1, and GB4943.1. It meets AEC-Q100 Grade 1 requirements (–40 to 125 °C) and supports automotive PPAP documentation via Skyworks' AIAG-compliant process.
Does SI8642BD-AS2R require external startup initialization or configuration?
No, SI8642BD-AS2R requires no startup initialization. Its RF-based isolation architecture enables immediate data transmission upon power-up. Outputs follow inputs within 40 µs after VDD exceeds UVLO threshold, and no register writes or firmware setup are needed - simplifying integration into bare-metal or RTOS-based motor control firmware.
How does the fail-safe output mode function in SI8642BD-AS2R?
In SI8642BD-AS2R, the fail-safe mode defaults outputs to logic low when the input-side supply (VDD1) is unpowered but the output-side supply (VDD2) remains active. This behavior is fixed by part number ordering - "BD" suffix denotes low-default; "ED" variants provide high-default. No external pull resistors are required due to integrated 2 µA pull-downs.
What are the supply current requirements of SI8642BD-AS2R at 100 Mbps operation?
At 100 Mbps with 2.5 V supplies and 15 pF load, SI8642BD-AS2R draws 11 mA per side (22 mA total). At 5 V, it draws 14.3 mA per side (28.6 mA total). These values include all four channels active and reflect worst-case conditions specified in the Skyworks datasheet Table 4.2.
Can SI8642BD-AS2R be used in both industrial and automotive applications?
Yes, SI8642BD-AS2R is qualified for both domains: it meets industrial standards (JEDEC reliability, –40 to 125 °C operation) and carries full AEC-Q100 Grade 1 qualification with AIAG PPAP, IMDS, and CAMDS support. The "-AS2R" suffix explicitly denotes the automotive-grade version with enhanced process controls and zero-defect manufacturing methodology.
SI8642BD-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:
- 2/2
- 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
SI8642BD-AS2R FAQ
1.How can I place an order for SI8642BD-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642BD-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 SI8642BD-AS2R reliable?
The price and inventory of SI8642BD-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642BD-AS2R is usually 5 days.
3.What payment methods are accepted for SI8642BD-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642BD-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642BD-AS2R?
SI8642BD-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642BD-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 SI8642BD-AS2R?
For technical support, including SI8642BD-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642BD-AS2R requirements.
6.How does Aetrix verify that SI8642BD-AS2R is sourced from the original manufacturer or authorized distributors?
All SI8642BD-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 SI8642BD-AS2R meets industry standards.
7.What is the process for return or replacement of SI8642BD-AS2R?
All SI8642BD-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8642BD-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 SI8642BD-AS2R part is unused and in its original packaging.
Return procedure for SI8642BD-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642BD-AS2R Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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