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Skyworks Solutions Inc. SI86S642BB-AUR
- Part No.:
- SI86S642BB-AUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S642BB-AUR.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 4 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
SI86S642BB-AUR from Skyworks Solutions is a 4-channel, reinforced digital isolator with bidirectional signal isolation across a 6000 VRMS semiconductor barrier. It operates from 2.25–5.5 V on both sides, delivers 150 Mbps data rate, features 10 ns typical propagation delay and 3.5 ns pulse width distortion, and supports industrial motor control and battery management systems.
For engineers reviewing the SI86S642BB-AUR datasheet, SI86S642BB-AUR pinout, SI86S642BB-AUR application, or SI86S642BB-AUR equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain-ready availability details for high-reliability isolated interface design.
Technical Context
The SI86S642BB-AUR implements RF-based on/off keying modulation across a monolithic silicon dioxide isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its dual-supply architecture (VDD1/VDD2) supports independent 2.25–5.5 V operation per side with undervoltage lockout (UVLO+) at 2.18 V and reset threshold (RSTB–) at ~1.7 V.
It integrates Schmitt-trigger + CMOS-threshold inputs for noise immunity, tri-state outputs controlled by EN1/EN2 pins, and selectable fail-safe mode (default-high or default-low output during unpowered input). The device achieves 100 kV/µs transient immunity and meets IEC 60747-17 reinforced insulation requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed serial interfaces including isolated SPI and QSPI without external clock conditioning. |
| Isolation Rating | 6000 VRMS (1 min) - enables safe operation in 1000 VAC industrial bus and EV traction inverter gate drive circuits. |
| Propagation Delay | 10 ns typical - ensures tight timing alignment in closed-loop motor control and isolated ADC sampling paths. |
| Pulse Width Distortion | 3.5 ns typical - preserves duty cycle integrity for PWM signals in isolated power supply feedback loops. |
| Supply Voltage Range | 2.25–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Transient Immunity | ≥100 kV/µs - suppresses fast common-mode transients in noisy motor drive and inverter environments. |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions without derating. |
Pinout & Package
SI86S642BB-AUR is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage), supporting 6000 VRMS isolation. Pin assignments follow the Si86S64x family layout shown in Figure 2 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides bias for input-side logic and transmitter circuitry; requires 0.1 µF + 10 µF local bypassing. |
| A1–A4 | Side A digital I/O | Four isolated input channels; accept Schmitt-trigger + CMOS thresholds for robust noise rejection. |
| EN1 | Side A output enable | Active-high control: drives all A-side outputs into high-impedance when low, enabling bus sharing. |
| VDD2, GND2 | Side B power supply | Independent bias for output-side logic and receiver; galvanically isolated from VDD1/GND1. |
| B1–B4 | Side B digital I/O | Four isolated output channels; deliver rail-to-rail CMOS-compatible signals with 50 Ω nominal output impedance. |
| EN2 | Side B output enable | Active-high control: places all B-side outputs in high-impedance state, supporting multi-drop configurations. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift issues of optocouplers; enables stable 150 Mbps operation over full temperature range. |
| Selectable fail-safe output mode | Ordering option determines whether outputs default to logic high or low during VDD1 loss - critical for safe shutdown in BMS and inverter systems. |
| Tri-state output control via EN1/EN2 | Enables shared-bus topologies (e.g., isolated CAN or RS-485 transceivers) without external bus switches or contention risk. |
| 100 kV/µs CMTI rating | Withstands rapid common-mode dv/dt events in SiC/GaN inverter switching nodes, preventing false triggering in gate drivers. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including onboard chargers and battery management systems up to +125 °C junction temperature. |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating PWM signals between MCU and gate driver ICs in 3-phase inverter stages. IC Role / Device Role / Timing Role: Bidirectional digital isolator providing timing-critical gate drive enable/disable and fault feedback across 6000 VRMS barrier. Use Value: 10 ns propagation delay and 3.5 ns pulse width distortion preserve dead-time accuracy and prevent shoot-through in IGBT/SiC modules. |
Use Scenario: Isolating cell voltage monitoring and balancing commands between MCU and analog front-end in high-voltage battery packs. IC Role / Device Role / Timing Role: Four-channel isolator separating 3.3 V MCU domain from 400–800 V battery stack domain with reinforced insulation. Use Value: 6000 VRMS rating and IEC 60747-17 compliance meet functional safety requirements for ASIL-C BMS designs. |
| Isolated Switch-Mode Power Supply | Medical Isolated Data Acquisition |
|
Use Scenario: Providing isolated feedback for secondary-side regulation in offline AC/DC converters with >1 kV working voltage. IC Role / Device Role / Timing Role: Digital isolator transmitting error amplifier output and synchronous rectifier control signals across primary-secondary boundary. Use Value: 150 Mbps capability supports high-frequency LLC resonant controllers; 100 kV/µs CMTI prevents misregulation during transformer ringing. |
Use Scenario: Isolating ECG/EEG sensor front-end ADC outputs from USB or Ethernet host processor in Class II medical devices. IC Role / Device Role / Timing Role: Reinforced isolator meeting 60601-1 creepage/clearance and leakage current limits for patient-connected equipment. Use Value: UL 1577 and VDE 60747-17 certifications satisfy regulatory testing requirements without additional system-level isolation components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4402BRWZ | 4-channel, 100 Mbps, 5000 VRMS, SOIC-16, 15 ns propagation delay | Lacks AEC-Q100 qualification and 6000 VRMS rating; lower CMTI (75 kV/µs) | Preferred where cost sensitivity outweighs automotive qualification and highest isolation voltage needs. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, 25 ns propagation delay, lower power | Half the data rate and slower timing; no AEC-Q100 or 6000 VRMS support | Suitable for non-safety-critical industrial I/O where bandwidth and isolation margin are relaxed. |
Compared with ADUM4402BRWZ and ISO6741FDWR, SI86S642BB-AUR delivers higher isolation voltage (6000 vs. 5000 VRMS), faster timing (10 ns vs. 15/25 ns), and automotive qualification - making it optimal for high-reliability motor control and EV battery systems requiring reinforced insulation and precise signal integrity.
Availability
SI86S642BB-AUR is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management systems, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SI86S642BB-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 for high-performance wireless and wired systems.
The Si86S6xx family is engineered for high-reliability galvanic isolation in harsh environments - targeting industrial automation, medical electronics, and automotive electrification where safety certification, timing precision, and noise immunity are mandatory.
FAQ
What is the isolation voltage rating of the SI86S642BB-AUR?
The SI86S642BB-AUR is rated for 6000 VRMS isolation (1 minute per UL 1577), achieved using a reinforced silicon dioxide barrier in its WB SOIC-16 package. This rating supports applications requiring enhanced insulation, such as industrial inverters and automotive battery management systems operating above 1000 VDC.
Does the SI86S642BB-AUR require external start-up initialization?
No, the SI86S642BB-AUR does not require external start-up initialization. Its RF-based modulation architecture enables immediate operation upon power-up. Outputs transition from a 100 kΩ pulldown state to correct logic levels within 0.3 ms after VDD exceeds the UVLO+ threshold (2.18 V).
How does the fail-safe mode function on the SI86S642BB-AUR?
The SI86S642BB-AUR offers ordering-option-selectable fail-safe mode: when VDD1 is unpowered but VDD2 remains active, outputs default to either logic high or logic low based on the specific variant. This behavior is defined in Table 4 of the datasheet and ensures predictable system state during power faults.
What is the maximum data rate supported by the SI86S642BB-AUR?
The SI86S642BB-AUR supports data rates up to 150 Mbps across all four channels. This performance enables use in high-speed isolated interfaces such as SPI, QSPI, and digital encoder feedback links without timing bottlenecks or external clock recovery circuitry.
Is the SI86S642BB-AUR qualified for automotive applications?
Yes, the SI86S642BB-AUR is AEC-Q100 Grade 1 qualified (–40 to +125 °C), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation. It is designed for automotive applications including onboard chargers, traction inverters, and battery management systems.
SI86S642BB-AUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI86S642BB-AUR FAQ
1.How can I place an order for SI86S642BB-AUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S642BB-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 SI86S642BB-AUR reliable?
The price and inventory of SI86S642BB-AUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S642BB-AUR is usually 5 days.
3.What payment methods are accepted for SI86S642BB-AUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S642BB-AUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S642BB-AUR?
SI86S642BB-AUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S642BB-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 SI86S642BB-AUR?
For technical support, including SI86S642BB-AUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S642BB-AUR requirements.
6.How does Aetrix verify that SI86S642BB-AUR is sourced from the original manufacturer or authorized distributors?
All SI86S642BB-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 SI86S642BB-AUR meets industry standards.
7.What is the process for return or replacement of SI86S642BB-AUR?
All SI86S642BB-AUR units undergo pre-shipment inspection (PSI). If there is an issue with SI86S642BB-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 SI86S642BB-AUR part is unused and in its original packaging.
Return procedure for SI86S642BB-AUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S642BB-AUR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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