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Skyworks Solutions Inc. SI86S640BB-AU
- Part No.:
- SI86S640BB-AU
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI86S640BB-AU.pdf
- Description:
- 2.5 KVRMS ISOLATOR, 4 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,282
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Product details
Overview
SI86S640BB-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 operates from 2.25–5.5 V supplies and is used in isolated ADC interfaces, motor control gate drivers, and onboard charger supervision circuits.
For engineers reviewing the SI86S640BB-AU datasheet, SI86S640BB-AU pinout, SI86S640BB-AU application, or SI86S640BB-AU equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, precise fail-safe output behavior under undervoltage, and real-world timing performance metrics - all specific to the SI86S640BB-AU variant.
Technical Context
The SI86S640BB-AU implements RF-based on/off keying modulation across its isolation barrier, eliminating startup initialization and enabling immediate deterministic operation after power-up. Its dual-side undervoltage lockout (UVLO) monitors-VDDUV+ = 2.18 V (typ), VDDUV– = 2.05 V (typ)-ensure robust reset behavior during supply transients.
It features Schmitt-trigger + CMOS threshold inputs for noise immunity, tri-state outputs controlled by EN1/EN2 pins, and selectable fail-safe mode (default high or low) defined at ordering. The device includes 36 ns input deglitch filters and achieves 100 kV/µs transient immunity per IEC 60747-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, isolated UART, and real-time control loops without protocol overhead. |
| Propagation delay | 10 ns (typ) - enables tight timing budgets in motor control PWM feedback and isolated ADC sampling. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements for industrial inverters and EV battery management 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 applications and industrial ambient environments. |
| Transient immunity | 100 kV/µs (min) - ensures reliable operation in high-noise motor drive and SMPS environments. |
| AEC-Q100 grade | Qualified - validated for automotive use including onboard chargers and traction inverter control. |
Pinout & Package
SI86S640BB-AU is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced insulation. Pin layout follows Figure 2 (Si86S64x/L4x) in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power domain | Supplies and grounds the input-side logic; requires 0.1 µF + 10 µF bypass capacitors. |
| A1–A4 | Side A digital I/O | Four unidirectional input channels from controller side; Schmitt-trigger + CMOS thresholds. |
| EN1 | Side A output enable | Active-high control: drives A-side outputs into high-impedance when low. |
| VDD2, GND2 | Side B power domain | Supplies and grounds the isolated output-side logic; independent of Side A supply. |
| B1–B4 | Side B digital I/O | Four unidirectional output channels to isolated peripherals; fail-safe default state configurable at order time. |
| EN2 | Side B output enable | Active-high control: drives B-side outputs into high-impedance when low. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture enables immediate deterministic output behavior post-power-up - no handshake or configuration required. |
| Selectable fail-safe mode | Ordering option defines default B-side output as logic high or low during VDD1 undervoltage - critical for safe shutdown in motor control. |
| 36 ns input deglitch filter | Rejects sub-36 ns noise pulses on A1–A4 inputs - prevents false triggering in noisy industrial bus environments. |
| Tri-state outputs with enable | EN1/EN2 pins allow single-point control of all four outputs per side - simplifies bus arbitration and reduces external logic. |
| Reinforced safety certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1, CQC GB4943.1 - eliminates need for system-level re-certification in medical and EV applications. |
Applications
| Isolated ADC Interface | Motor Control Gate Driver |
|---|---|
|
Use Scenario: Isolating serial interface between microcontroller and isolated delta-sigma ADC in precision current sensing. IC Role / Device Role / Timing Role: SI86S640BB-AU transmits clock, data, and frame sync signals across isolation barrier with <10 ns skew. Use Value: Enables 16-bit measurement accuracy by rejecting common-mode noise >100 kV/µs while maintaining SPI timing integrity. |
Use Scenario: Providing isolated gate drive signals to IGBTs in three-phase inverter stages of EV traction systems. IC Role / Device Role / Timing Role: SI86S640BB-AU delivers synchronized PWM enable/disable and fault feedback with fail-safe low-default during MCU reset. Use Value: Prevents shoot-through by ensuring gate drivers default to OFF during power sequencing or brownout events. |
| Onboard Charger Supervision | Battery Management System (BMS) |
|
Use Scenario: Isolating communication and status signals between primary-side AC/DC controller and secondary-side DC/DC supervisor in OBC. IC Role / Device Role / Timing Role: SI86S640BB-AU carries isolated analog monitoring, thermal alerts, and enable commands with AEC-Q100 reliability. Use Value: Meets automotive functional safety requirements (ASIL-B capable) without adding external watchdog or redundancy logic. |
Use Scenario: Isolating cell voltage monitoring ICs and pack contactor control signals in high-voltage EV battery packs. IC Role / Device Role / Timing Role: SI86S640BB-AU transfers isolated voltage readings and precharge status with 6000 VRMS withstand capability. Use Value: Supports 800 V+ battery architectures with certified reinforced insulation, eliminating creepage/clearance board design constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4402ARWZ | 4-channel, 100 Mbps, 5000 VRMS, SOIC-16, non-AEC-Q100 | Lacks automotive qualification and 6000 VRMS rating; lower CMTI (75 kV/µs) | Use where cost sensitivity outweighs automotive compliance and higher isolation voltage. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, AEC-Q100 Grade 1 | Lower data rate and isolation rating; no deglitch filter option | Prefer for low-speed BMS monitoring where extended temperature range is sufficient but 150 Mbps not needed. |
Compared with ADUM4402ARWZ and ISO6741FDWR, the SI86S640BB-AU uniquely combines 150 Mbps speed, 6000 VRMS reinforced isolation, AEC-Q100 qualification, and 36 ns deglitch filtering - making it the only option suitable for high-bandwidth, safety-critical automotive and industrial isolation where timing, noise immunity, and certification converge.
Availability
SI86S640BB-AU is available at Aetrix Electronics and suitable for industrial automation systems, onboard chargers, and battery management systems requiring stable component supply across long production lifecycles.
Supply support for SI86S640BB-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 high-performance analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.
The Si86S6xx family was designed specifically for high-reliability, high-speed digital isolation in safety-critical automotive and industrial systems - emphasizing AEC-Q100 compliance, reinforced insulation, and deterministic timing.
FAQ
What is the isolation voltage rating of the SI86S640BB-AU?
The SI86S640BB-AU is rated for 6000 VRMS isolation for 1 minute per UL 1577, with reinforced insulation certification per VDE 60747-17 and CSA 62368-1. This rating applies specifically to the WB SOIC-16 package variant and is validated for continuous operation in systems up to 800 V working voltage.
Does the SI86S640BB-AU require external configuration or initialization at power-up?
No. The SI86S640BB-AU uses RF-based on/off keying modulation and requires no start-up initialization sequence. Outputs become active within 0.3 ms after VDD exceeds UVLO+, and default states (high or low) are determined solely by the ordering option - no firmware or external programming is needed for SI86S640BB-AU operation.
How does the fail-safe output mode work on the SI86S640BB-AU?
The SI86S640BB-AU's fail-safe mode is fixed at manufacturing: when VDD1 drops below UVLO– (~2.05 V), B1–B4 outputs default to either logic high or logic low based on the ordering suffix (e.g., "BB" denotes default-low). This behavior is guaranteed across –40 to 125 °C and is independent of EN2 state - a core safety feature of the SI86S640BB-AU.
What is the purpose of the 36 ns input deglitch filter in the SI86S640BB-AU?
The SI86S640BB-AU includes factory-configured 36 ns input deglitch filters on A1–A4 pins. Any input pulse narrower than 36 ns is suppressed, preventing false edge detection from EMI or switching noise in motor drives or SMPS. Pulses wider than 36 ns pass through with 36 ns added delay - a deterministic behavior documented for SI86S640BB-AU in the datasheet.
Is the SI86S640BB-AU pin-compatible with other devices in the Si86S6xx family?
Yes - the SI86S640BB-AU shares identical pinout (Figure 2), package (WB SOIC-16), and electrical interface with all Si86S64x variants (e.g., SI86S641BB-AU, SI86S642BB-AU). Channel count, directionality, and fail-safe default are the only differences; no PCB redesign is needed when substituting within the Si86S64x group.
SI86S640BB-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:
- 4/0
- 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
SI86S640BB-AU FAQ
1.How can I place an order for SI86S640BB-AU through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S640BB-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 SI86S640BB-AU reliable?
The price and inventory of SI86S640BB-AU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S640BB-AU is usually 5 days.
3.What payment methods are accepted for SI86S640BB-AU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S640BB-AU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S640BB-AU?
SI86S640BB-AU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S640BB-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 SI86S640BB-AU?
For technical support, including SI86S640BB-AU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S640BB-AU requirements.
6.How does Aetrix verify that SI86S640BB-AU is sourced from the original manufacturer or authorized distributors?
All SI86S640BB-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 SI86S640BB-AU meets industry standards.
7.What is the process for return or replacement of SI86S640BB-AU?
All SI86S640BB-AU units undergo pre-shipment inspection (PSI). If there is an issue with SI86S640BB-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 SI86S640BB-AU part is unused and in its original packaging.
Return procedure for SI86S640BB-AU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S640BB-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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