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Skyworks Solutions Inc. SI86S642BB-AU
- Part No.:
- SI86S642BB-AU
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S642BB-AU.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 4 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,063
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Product details
Overview
SI86S642BB-AU from Skyworks Solutions is a 4-channel, reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It supports DC to 150 Mbps data rates, delivers 10 ns typical propagation delay, and provides 6000 VRMS isolation rating in a WB SOIC-16 package. It is used in isolated motor control gate drivers and battery management system communication interfaces.
For engineers reviewing the SI86S642BB-AU datasheet, SI86S642BB-AU pinout, SI86S642BB-AU application, or SI86S642BB-AU equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, and real-world use context for industrial and EV traction inverter designs.
Technical Context
The SI86S642BB-AU implements RF-based on/off keying modulation across a monolithic silicon dioxide isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its architecture includes Schmitt-trigger inputs with 0.15×VDD hysteresis and CMOS-compatible thresholds for robust noise immunity.
It features dual independent enable pins (EN1, EN2), tri-state output control per side, and selectable fail-safe default output state (high or low) during unpowered input conditions - all configurable at ordering. The device operates across –40 to 125 °C with 2.25–5.5 V supply range on both sides.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, isolated ADC/DAC interfaces, and real-time motor control feedback loops. |
| Propagation delay | 10 ns typical - enables tight timing budgets in closed-loop power converter control and fast-response safety systems. |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per IEC 60747-17 for onboard chargers and traction inverters. |
| Supply voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level shifters. |
| Temperature range | –40 to 125 °C - qualified for under-hood automotive and industrial ambient environments. |
| CMTI | 100 kV/µs minimum - ensures reliable operation in high-dv/dt motor drive and SMPS applications. |
| AEC-Q100 | Qualified - certified for automotive applications including battery management systems and OBCs. |
Pinout & Package
SI86S642BB-AU is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance compliant for 6000 VRMS reinforced insulation. Pin layout follows Figure 2 of the datasheet (Si86S64x/L4x family).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides isolated 2.25–5.5 V domain for controller-side logic; requires 0.1 µF + 10 µF local bypass. |
| VDD2, GND2 | Side B power supply | Independent 2.25–5.5 V domain for isolated peripheral side; decoupling mandatory for CMTI performance. |
| A1–A4 | Side A digital I/O | Four unidirectional input channels from controller side; Schmitt-triggered for noise rejection. |
| B1–B4 | Side B digital I/O | Four corresponding isolated output channels; CMOS outputs with 50 Ω nominal impedance. |
| EN1, EN2 | Active-high enable | Tri-states all outputs on respective side when low; enables synchronized shutdown in fault conditions. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay - outputs become valid within 0.3 ms of VDD stabilization. |
| Selectable fail-safe mode | Ordering option defines default output state (high or low) during Side A power loss while Side B remains powered. |
| High electromagnetic immunity | 100 kV/µs CMTI and 8 kV HBM ESD rating ensure reliability in noisy motor drive and power conversion environments. |
| Reinforced safety certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1, and CQC GB4943.1 - accepted for end-equipment safety approvals. |
| Automotive-grade flow | Manufactured using automotive-specific process controls and PPAP documentation support per AIAG standards. |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Bidirectional digital isolator providing timing-critical PWM and fault reporting across isolation barrier. Use Value: 10 ns propagation delay and 100 kV/µs CMTI prevent shoot-through and false fault triggering in high-dv/dt switching. |
Use Scenario: Isolating cell monitoring ICs (e.g., BQ796xx) from MCU in high-voltage battery packs. IC Role / Device Role / Timing Role: High-reliability data isolator for UART/SPI communication between isolated slave and master controllers. Use Value: AEC-Q100 qualification and 6000 VRMS rating meet ASIL-D functional safety and HV insulation requirements. |
| Isolated Switch-Mode Power Supply | Traction Inverter Control |
|
Use Scenario: Feedback path isolation for secondary-side voltage/current sensing in LLC resonant converters. IC Role / Device Role / Timing Role: Low-latency digital isolator transmitting error amplifier output and synchronous rectifier control signals. Use Value: 2.25–5.5 V dual-supply flexibility allows direct interface with 3.3 V sensing circuits and 5 V gate drivers. |
Use Scenario: Isolating MCU PWM outputs and IGBT/SiC gate driver inputs in electric vehicle main inverters. IC Role / Device Role / Timing Role: Reinforced isolator delivering precise timing-aligned gate signals with fail-safe default state during brownout. Use Value: Selectable fail-safe mode ensures gate drivers default to safe-off state if MCU supply fails mid-cycle. |
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, 25 Mbps max data rate; 30 ns propagation delay; 5000 VRMS isolation; no AEC-Q100 qualification. | Suitable for industrial automation but not automotive traction systems requiring 6000 VRMS or ASIL compliance. | Choose ADUM2402BRWZ only for cost-sensitive non-automotive applications where <100 Mbps speed is acceptable. |
| ISO6742FDWR | 4-channel, 50 Mbps max data rate; 16 ns propagation delay; 5000 VRMS; AEC-Q100 Grade 1 (–40 to 125 °C). | Meets automotive temperature range but lacks 6000 VRMS rating and failsafe output selection option. | Prefer ISO6742FDWR only when lower data rate suffices and UL/VDE 6000 VRMS certification is not required. |
Compared with ADUM2402BRWZ and ISO6742FDWR, SI86S642BB-AU uniquely combines 150 Mbps speed, 6000 VRMS reinforced isolation, AEC-Q100 qualification, and user-selectable fail-safe output - making it the only option qualified for high-performance EV traction inverter gate drive isolation.
Availability
SI86S642BB-AU 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 and long-term lifecycle support.
Supply support for SI86S642BB-AU 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 Si86S6xx family was designed specifically for high-reliability, high-speed digital isolation in automotive and industrial power systems - emphasizing reinforced safety, low latency, and robust noise immunity.
FAQ
What is the maximum data rate supported by the SI86S642BB-AU?
The SI86S642BB-AU supports DC to 150 Mbps data rates. This is specified in the datasheet under "Key Features" and confirmed in Table 10 electrical characteristics. The 150 Mbps capability enables high-speed SPI, isolated ADC interfaces, and real-time control loop signaling without protocol bottlenecks. SI86S642BB-AU achieves this using RF-based on/off keying modulation across its silicon dioxide barrier.
Does the SI86S642BB-AU require external initialization or configuration at power-up?
No, the SI86S642BB-AU requires no start-up initialization. Its RF modulation architecture enables immediate operation after VDD stabilizes above UVLO threshold (~2.18 V). Outputs become valid within 0.3 ms, and no firmware handshake or register programming is needed. This behavior is documented in Section 2.1 and Figure 9 of the SI86S642BB-AU datasheet.
What safety certifications does the SI86S642BB-AU hold?
The SI86S642BB-AU holds UL 1577 recognition (6000 VRMS, 1 minute), VDE 60747-17 (reinforced insulation), CSA 62368-1 and 60601-1, and CQC GB4943.1. These are explicitly listed in the "Safety Regulatory Approvals (Pending)" section of the datasheet. SI86S642BB-AU is also AEC-Q100 qualified for automotive use.
How does the fail-safe mode work on the SI86S642BB-AU?
The SI86S642BB-AU offers ordering-option-selectable fail-safe mode: outputs default to logic high or low when Side A is unpowered but Side B remains active. This behavior is defined in Table 4 ("Si86S6x/Lx/Mx Logic Operation") and activated via part number suffix. SI86S642BB-AU implements this using internal reset circuitry that detects VDD1 below RSTB– (~1.7 V) and asserts the configured default state.
What is the purpose of the EN1 and EN2 pins on the SI86S642BB-AU?
EN1 and EN2 are active-high enable inputs controlling output drivers on Side A and Side B respectively. When low, they place all associated outputs (A1–A4 or B1–B4) into high-impedance state. This enables synchronized tri-state control during system fault conditions or power sequencing. Their function is defined in Table 1 and Figure 2 of the SI86S642BB-AU datasheet.
SI86S642BB-AU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-AU FAQ
1.How can I place an order for SI86S642BB-AU through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S642BB-AU 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-AU reliable?
The price and inventory of SI86S642BB-AU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S642BB-AU is usually 5 days.
3.What payment methods are accepted for SI86S642BB-AU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S642BB-AU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S642BB-AU?
SI86S642BB-AU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S642BB-AU 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-AU?
For technical support, including SI86S642BB-AU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S642BB-AU requirements.
6.How does Aetrix verify that SI86S642BB-AU is sourced from the original manufacturer or authorized distributors?
All SI86S642BB-AU 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-AU meets industry standards.
7.What is the process for return or replacement of SI86S642BB-AU?
All SI86S642BB-AU units undergo pre-shipment inspection (PSI). If there is an issue with SI86S642BB-AU, 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-AU part is unused and in its original packaging.
Return procedure for SI86S642BB-AU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S642BB-AU 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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