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Skyworks Solutions Inc. SI8642EA-AUR
- Part No.:
- SI8642EA-AUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8642EA-AUR.pdf
- Description:
- AUTOMOTIVE 1 KV 2 FORWARD & 2 RE
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
SI8642EA-AUR from Skyworks is a quad-channel digital isolator with 2 input channels on VDD1 side and 2 output channels on VDD2 side, supporting up to 150 Mbps data rate, <10 ns propagation delay, and 1 kV isolation rating in QSOP-16 package. It features Schmitt trigger inputs, tri-state outputs with enable control, and selectable high-default fail-safe mode - deployed in isolated ADC interfaces and motor control gate drivers.
For engineers reviewing the SI8642EA-AUR datasheet, SI8642EA-AUR pinout, SI8642EA-AUR application, or SI8642EA-AUR equivalent, key selection criteria include channel configuration (2:2), fail-safe default-high behavior, 1 kV isolation rating, QSOP-16 footprint compatibility, and automotive-grade AEC-Q100 qualification for battery management systems.
Technical Context
The SI8642EA-AUR implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its dual-enable architecture (EN1 for A3/A4, EN2 for B1/B2) supports independent tri-state control of each side's outputs.
It operates across –40 to 125 °C with 2.5–5.5 V supply per side, maintains stable timing (0.5 ns channel-channel skew, 2 ns propagation delay skew), and meets reinforced insulation requirements per IEC 62368-1 and basic VDE 0884-10 at 1 kV RMS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 4-channel, 2-input/2-output split (A3,A4 on VDD1; B1,B2 on VDD2) |
| Max Data Rate | 150 Mbps - supports high-speed SPI, UART, and PWM signal isolation |
| Propagation Delay | ≤13 ns max - enables tight-timing feedback loops in motor control |
| Isolation Rating | 1.0 kV RMS - certified to UL 1577, CSA 5A, and IEC 60950-1 basic insulation |
| Fail-Safe Default | High - outputs drive logic high during VDD1 loss while VDD2 remains powered |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V and 5 V logic domains |
| Operating Temperature | –40 to 125 °C - qualified for under-hood automotive and industrial environments |
Pinout & Package
SI8642EA-AUR is housed in a RoHS-compliant QSOP-16 package (5.3 mm × 10.2 mm, 1.0 mm height) with 0.635 mm pitch and standard JEDEC land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to input-side logic and channel transmitter; bypass with 0.1 µF capacitor |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier |
| A3, A4 | Digital inputs (VDD1 side) | Accept 2.5–5.5 V logic; Schmitt-triggered for >0.44 V hysteresis and noise rejection |
| EN1 | Enable for A3/A4 outputs | Drives A3/A4 outputs to high-impedance when low; internally pulled up to VDD1 |
| VDD2 | Output-side power supply | Supplies power to output-side logic and channel receiver; bypass with 0.1 µF capacitor |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1 |
| B1, B2 | Digital outputs (VDD2 side) | Drive 50 Ω nominal impedance; default high during VDD1 loss (fail-safe mode) |
| EN2 | Enable for B1/B2 outputs | Drives B1/B2 outputs to high-impedance when low; internally pulled up to VDD2 |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; achieves 60-year life at rated voltage |
| Selectably high-default fail-safe | Ensures safe system state (e.g., gate driver disable) during primary-side power loss |
| Tri-state outputs with dual enable | EN1 and EN2 allow independent output disabling for multiplexing or clock sync |
| Ultra-low power at 100 Mbps | 11 mA per side at 5 V - reduces thermal load in dense PCB layouts |
| High CMTI immunity | ≥50 kV/µs - maintains signal integrity in noisy motor drive and inverter environments |
Applications
| Motor Control Gate Driver Interface | Isolated ADC/DAC Data Link |
|---|---|
Use Scenario: Isolating PWM signals between MCU and IGBT/SiC gate drivers in traction inverters. IC Role / Device Role / Timing Role: Bidirectional 2:2 channel isolator transmitting gate enable/disable and fault feedback with sub-13 ns timing precision. Use Value: Prevents ground loop damage and ensures fail-safe shutdown (default-high outputs hold gate off during controller power loss). |
Use Scenario: Transmitting digitized sensor data from isolated high-voltage domain to host MCU in battery pack monitoring. IC Role / Device Role / Timing Role: High-speed serial interface isolator for SPI-based isolated ADCs operating up to 150 Mbps. Use Value: Maintains signal integrity with 0.5 ns channel skew and 350 ps peak jitter, enabling accurate multi-cell voltage sampling. |
| Battery Management System (BMS) Communication | On-Board Charger (OBC) Control Loop |
Use Scenario: Isolating CAN or UART communication between cell monitor ICs and main BMS controller across 400–800 V battery stacks. IC Role / Device Role / Timing Role: Robust data isolator with AEC-Q100 qualification and 125 °C operation for automotive-grade reliability. Use Value: Enables safe, long-life communication with 1 kV RMS isolation and 50 kV/µs CMTI in high-dv/dt battery environments. |
Use Scenario: Isolating feedback signals (voltage/current sense) and control commands between AC/DC and DC/DC stages in EV OBCs. IC Role / Device Role / Timing Role: Dual-enable isolator allowing dynamic reconfiguration of isolated control paths during charging modes. Use Value: Tri-state capability (via EN1/EN2) supports flexible topology switching without hardware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8642BA-AUR | Same 2:2 channel count and QSOP-16 package, but default-low fail-safe mode | Suitable where safety-critical outputs must default low (e.g., enable signals) | Select SI8642BA-AUR only if system requires active-low fail-safe assertion |
| ADUM140D0BRQZ | 4-channel, 2:2 configuration; 150 Mbps; 2.5–5.5 V; but only 3.75 kV isolation and no AEC-Q100 qualification | Limited to industrial, non-automotive applications requiring higher isolation voltage | Choose ADUM140D0BRQZ only for cost-sensitive industrial designs without automotive qualification needs |
Compared with SI8642BA-AUR (default-low), SI8642EA-AUR provides fail-safe high assertion critical for gate driver disable; versus ADUM140D0BRQZ, it delivers AEC-Q100 compliance and automotive PPAP support essential for OEM BMS deployments.
Availability
SI8642EA-AUR is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and traction inverter control requiring stable component supply across automotive production lifecycles.
Supply support for SI8642EA-AUR 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 and industrial systems, emphasizing low power, precise timing, and safety certification across wide temperature ranges.
FAQ
What is the fail-safe behavior of SI8642EA-AUR during input-side power loss?
When VDD1 is unpowered while VDD2 remains active, SI8642EA-AUR drives its B1 and B2 outputs to a logic high state - a configurable default-high fail-safe mode selected at manufacturing. This ensures safe deactivation of downstream devices like gate drivers. The transition occurs within 12 ns (tSD), and the behavior is guaranteed across –40 to 125 °C. SI8642EA-AUR does not require external pull-up resistors to maintain this state.
Does SI8642EA-AUR support independent enable control for each channel pair?
Yes, SI8642EA-AUR provides two dedicated enable inputs: EN1 controls the A3 and A4 output drivers (on VDD1 side), and EN2 controls the B1 and B2 output drivers (on VDD2 side). When either enable is low, its associated outputs enter high-impedance state - enabling dynamic signal routing or power-gating without affecting the other side. SI8642EA-AUR's EN pins are internally pulled up, so they may be left floating only in low-noise environments.
What isolation certifications apply to SI8642EA-AUR?
SI8642EA-AUR is certified to UL 1577 (1 kV RMS, 1 minute), CSA Component Acceptance Notice 5A, and IEC 60950-1 basic insulation. It meets AEC-Q100 Grade 1 qualification for automotive use and supports AIAG-compliant PPAP documentation. Unlike higher-rated variants (e.g., Si8642BD), SI8642EA-AUR is not VDE 0884-10 reinforced - its 1 kV rating is intended for functional isolation in battery monitoring and control loops, not primary safety barriers.
Can SI8642EA-AUR operate with mismatched supply voltages on each side?
Yes, SI8642EA-AUR supports independent 2.5–5.5 V supplies on VDD1 and VDD2, enabling level translation between 3.3 V microcontrollers and 5 V peripheral interfaces. Electrical specifications - including propagation delay (≤13 ns), CMTI (≥50 kV/µs), and output drive strength - are guaranteed across the full voltage range and temperature span (–40 to 125 °C). SI8642EA-AUR maintains timing accuracy regardless of VDD1/VDD2 differential.
What is the recommended bypass capacitance for SI8642EA-AUR?
Skyworks specifies a 0.1 µF ceramic capacitor between VDD1 and GND1, and another between VDD2 and GND2 - placed as close as possible to the respective pins. These capacitors suppress high-frequency noise and stabilize internal regulators. For noisy environments (e.g., motor drive PCBs), adding series resistors (50–300 Ω) on input/output traces is advised. SI8642EA-AUR does not require additional bulk capacitance beyond the 0.1 µF per supply rail.
SI8642EA-AUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SSOP (0.154", 3.90mm 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:
- 1000Vrms
- 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-QSOP
SI8642EA-AUR FAQ
1.How can I place an order for SI8642EA-AUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642EA-AUR 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 SI8642EA-AUR reliable?
The price and inventory of SI8642EA-AUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642EA-AUR is usually 5 days.
3.What payment methods are accepted for SI8642EA-AUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642EA-AUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642EA-AUR?
SI8642EA-AUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642EA-AUR 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 SI8642EA-AUR?
For technical support, including SI8642EA-AUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642EA-AUR requirements.
6.How does Aetrix verify that SI8642EA-AUR is sourced from the original manufacturer or authorized distributors?
All SI8642EA-AUR 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 SI8642EA-AUR meets industry standards.
7.What is the process for return or replacement of SI8642EA-AUR?
All SI8642EA-AUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8642EA-AUR, 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 SI8642EA-AUR part is unused and in its original packaging.
Return procedure for SI8642EA-AUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642EA-AUR 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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