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Skyworks Solutions Inc. SI86S641BB-IU
- Part No.:
- SI86S641BB-IU
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S641BB-IU.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 4 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
SI86S641BB-IU 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 operates from 2.25–5.5 V supplies and is qualified to AEC-Q100 for automotive onboard chargers and battery management systems.
For engineers reviewing the SI86S641BB-IU datasheet, SI86S641BB-IU pinout, SI86S641BB-IU application, or SI86S641BB-IU equivalent, key selection criteria include its 4-channel configuration with independent enable pins (EN1/EN2), fail-safe output mode selection, 36 ns input deglitch filter option, and compliance with IEC 60747-17 reinforced insulation for high-reliability industrial and automotive isolation interfaces.
Technical Context
The SI86S641BB-IU implements RF-based on/off keying modulation across a monolithic silicon isolation barrier, eliminating startup initialization and enabling deterministic timing behavior. Its architecture includes Schmitt-trigger + CMOS threshold inputs for noise immunity and tri-state outputs controlled by EN1 (Side A) and EN2 (Side B).
It features dual-supply operation with independent UVLO and reset circuitry per side (VDD1/VDD2), 36 ns input deglitch filtering (confirmed for Si86S64x family), and selectable fail-safe output state (default high or low) determined at ordering - with SI86S641BB-IU specifying default-low behavior per Table 4 logic operation.
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. |
| Propagation delay | 10 ns typical - enables tight timing budgets in motor control gate drivers and real-time feedback loops. |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for 600 VAC working voltage systems. |
| Supply voltage | 2.25–5.5 V - interoperable with 3.3 V and 5 V logic domains on both sides without level shifters. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial environments without derating. |
| Transient immunity | ≥100 kV/µs - ensures robust operation in noisy power electronics with fast-switching MOSFETs/IGBTs. |
| Input deglitch | 36 ns - suppresses sub-36 ns noise pulses on A-side inputs, preventing false triggering in EMI-prone motor drive PCBs. |
Pinout & Package
SI86S641BB-IU is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage/clearance, supporting 6000 VRMS isolation. Pinout follows Figure 2 (Si86S64x/L4x) in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A supply pair | Power and ground for input-side logic; requires 0.1 µF + 10 µF bypass capacitors placed adjacent to pins. |
| A1–A4 | Digital I/O (Side A) | Four isolated input/output channels on primary side; compatible with CMOS/Schmitt-trigger logic levels. |
| EN1 | Active-high enable (Side A) | Tri-states all A-side outputs when low; used for synchronized channel shutdown in power sequencing. |
| VDD2, GND2 | Side B supply pair | Independent isolated power domain for secondary-side interface; supports galvanic separation of MCU and power stage. |
| B1–B4 | Digital I/O (Side B) | Four corresponding isolated channels on secondary side; electrically decoupled from Side A with no shared reference. |
| EN2 | Active-high enable (Side B) | Tri-states all B-side outputs when low; enables independent control of isolated peripheral-side signaling. |
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, critical for fast-restart systems. |
| Reinforced IEC 60747-17 rating | Validated barrier integrity for lifetime operation at 600 VAC working voltage - satisfies safety-critical requirements in medical and EV traction inverters. |
| Selectable fail-safe mode | Ordering code BB specifies default-low output during VDD1 undervoltage - prevents undefined states in isolated gate driver enable paths. |
| High electromagnetic immunity | 100 kV/µs CMTI rating - maintains signal integrity in proximity to 100 A+ switching nodes without additional shielding or filtering. |
| Schmitt trigger + CMOS thresholds | Hysteresis ≥0.15×VDDx - rejects common-mode noise on long traces between PLC I/O modules and field sensors. |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between microcontroller and 3-phase inverter gate drivers in servo drives. IC Role / Device Role / Timing Role: Bidirectional 4-channel isolator transmitting gate enable/disable commands and receiving desaturation fault signals across 6000 VRMS barrier. Use Value: 10 ns propagation delay ensures <100 ns total loop latency for overcurrent protection, meeting IEC 61800-5-1 response time requirements. | Use Scenario: Isolating cell voltage monitoring ADC outputs and pack contactor control signals in high-voltage battery packs (400–800 VDC). IC Role / Device Role / Timing Role: Four independent isolation channels separating BMS MCU (Side A) from analog front-end and relay drivers (Side B). Use Value: AEC-Q100 qualification and –40 to 125 °C operation ensure reliability across thermal cycling in underhood battery enclosures. |
| Isolated Switch Mode Supply | Medical Isolated Data Acquisition |
Use Scenario: Providing feedback isolation for voltage/current sensing in 1–3 kW LLC resonant converters with synchronous rectification. IC Role / Device Role / Timing Role: Transmitting isolated error amplifier output and receiving synchronous FET gate timing signals across reinforced barrier. Use Value: 150 Mbps capability supports high-resolution digital current sensing (e.g., isolated sigma-delta modulators) without bandwidth limitation. | Use Scenario: Isolating SPI communication between patient-connected analog front-end (AFE) and host MCU in portable ECG/defibrillator units. IC Role / Device Role / Timing Role: 4-channel isolator carrying SPI clock, chip select, MOSI, and MISO while maintaining 6000 VRMS patient-side isolation. Use Value: IEC 60601-1 reinforced insulation certification enables direct integration into Class BF applied parts without additional system-level barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4401BRWZ | 4-channel, 100 Mbps, 5000 VRMS, 15 ns propagation delay, 3.1–5.5 V supply | Lacks AEC-Q100 qualification and 36 ns deglitch filter; uses iCoupler capacitive isolation | Preferred for cost-sensitive industrial PLCs where 5000 VRMS suffices and automotive qualification is not required. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, 16 ns propagation delay, 1.71–5.5 V supply, integrated LDO | Lower speed and isolation rating; includes 3.3 V LDO on isolated side - reduces external BOM but limits flexibility | Selected when isolated-side power regulation is needed and 50 Mbps meets system timing constraints. |
Compared with ADUM4401BRWZ and ISO6741FDWR, SI86S641BB-IU offers higher isolation (6000 vs. 5000 VRMS), faster data rate (150 vs. 100/50 Mbps), and automotive qualification - making it optimal for next-generation EV powertrain and high-density industrial inverters requiring extended lifetime reliability.
Availability
SI86S641BB-IU is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management systems, and isolated switch mode supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI86S641BB-IU 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 galvanic isolation in automotive electrification and industrial automation, emphasizing reinforced safety certification, high CMTI, and extended temperature operation.
FAQ
What is the isolation voltage rating of the SI86S641BB-IU?
The SI86S641BB-IU is rated for 6000 VRMS isolation per UL 1577 for 1 minute, with reinforced insulation certified to IEC 60747-17. This rating applies to the WB SOIC-16 package and supports working voltages up to 600 VAC in end equipment complying with IEC 61010-1 or IEC 62368-1.
Does the SI86S641BB-IU require external startup configuration or initialization?
No, the SI86S641BB-IU requires no startup initialization due to its RF on/off keying architecture. Outputs become valid within 0.3 ms after VDD1/VDD2 rise above UVLO thresholds, and device configuration (e.g., fail-safe state) is loaded automatically from internal nonvolatile settings on power-up.
What does the "BB" suffix indicate in SI86S641BB-IU?
The "BB" suffix in SI86S641BB-IU denotes the default-low fail-safe output option: when VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic low. This ordering option is defined in Table 4 of the datasheet and is laser-trimmed during manufacturing.
Can the SI86S641BB-IU be used in SPI isolation applications?
Yes, the SI86S641BB-IU supports SPI isolation by assigning A1–A4 and B1–B4 to MOSI, MISO, SCLK, and CS signals. While not a dedicated SPI isolator like Si86SS41, its 150 Mbps capability, low skew, and 10 ns propagation delay make it suitable for isolated SPI buses up to 37.5 MHz clock rate with proper layout.
Is the SI86S641BB-IU qualified for automotive applications?
Yes, the SI86S641BB-IU is AEC-Q100 qualified (Grade 0, –40 to 125 °C), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation - enabling use in onboard chargers, battery management systems, and traction inverter controls.
SI86S641BB-IU 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:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 14ns, 14ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI86S641BB-IU FAQ
1.How can I place an order for SI86S641BB-IU through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S641BB-IU 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 SI86S641BB-IU reliable?
The price and inventory of SI86S641BB-IU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S641BB-IU is usually 5 days.
3.What payment methods are accepted for SI86S641BB-IU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S641BB-IU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S641BB-IU?
SI86S641BB-IU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S641BB-IU 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 SI86S641BB-IU?
For technical support, including SI86S641BB-IU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S641BB-IU requirements.
6.How does Aetrix verify that SI86S641BB-IU is sourced from the original manufacturer or authorized distributors?
All SI86S641BB-IU 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 SI86S641BB-IU meets industry standards.
7.What is the process for return or replacement of SI86S641BB-IU?
All SI86S641BB-IU units undergo pre-shipment inspection (PSI). If there is an issue with SI86S641BB-IU, 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 SI86S641BB-IU part is unused and in its original packaging.
Return procedure for SI86S641BB-IU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S641BB-IU 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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