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Skyworks Solutions Inc. SI86S642BC-AS1
- Part No.:
- SI86S642BC-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S642BC-AS1.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 4 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
SI86S642BC-AS1 from Skyworks Solutions is a 4-channel, reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It supports up to 150 Mbps data rate, features 10 ns typical propagation delay, 6000 VRMS isolation rating, and operates from 2.25–5.5 V supplies on both sides. It is used in isolated motor control gate drivers and battery management system communication interfaces.
For engineers reviewing the SI86S642BC-AS1 datasheet, SI86S642BC-AS1 pinout, SI86S642BC-AS1 application, or SI86S642BC-AS1 equivalent, key selection criteria include its 4-channel configuration with A1–A4/B1–B4 I/O mapping, fail-safe default-low output option (denoted by 'B' in part number), WB SOIC-16 package with 8.3 mm creepage, and compatibility with industrial and automotive AEC-Q100 Grade 1 systems.
Technical Context
The SI86S642BC-AS1 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 high noise immunity.
It supports independent undervoltage lockout (UVLO) on both sides (VDDUV+ = 2.18 V typ), 100 kV/µs CMTI, and configurable fail-safe mode-default low output during unpowered input side while output side remains powered. Sleep mode is not implemented in this variant (no SMb pin).
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 control loops |
| Propagation delay | 10 ns typical - enables tight timing budgets in motor control PWM feedback paths |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per IEC 60747-17 for 1200 V DC bus systems |
| Supply voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| CMTI | ≥100 kV/µs - ensures robust operation in high-di/dt motor drive and inverter applications |
| Fail-safe mode | Default low output - prevents undefined gate driver states during MCU power-up or brownout |
Pinout & Package
SI86S642BC-AS1 is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and 10.3 mm clearance, supporting 6000 VRMS reinforced isolation per UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A supply pair | Power and ground for primary-side digital interface (e.g., MCU GPIO or SPI controller) |
| A1–A4 | Side A digital I/O | Four unidirectional input channels from controller side; no direction control pin required |
| VDD2, GND2 | Side B supply pair | Independent power domain for isolated peripherals (e.g., gate drivers, sensors) |
| B1–B4 | Side B digital I/O | Four corresponding isolated output channels driving secondary-side circuitry |
| EN1, EN2 | Active-high enable inputs | Tri-state all outputs on respective side when low; used for power sequencing or fault shutdown |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot delay; output follows input within 0.3 ms of VDD stabilization |
| Reinforced IEC 60747-17 rating | Validated barrier design supports safety-critical isolation in medical and EV traction inverters |
| Schmitt trigger + CMOS threshold inputs | 0.15×VDD hysteresis rejects >36 ns noise pulses without external filtering |
| Tri-state outputs with enable | EN1/EN2 allow synchronized channel disable for system-level fault containment and power gating |
| AEC-Q100 Grade 1 qualification | Qualified for automotive applications including onboard chargers and battery management systems |
Applications
| Motor Control Gate Driver Interface | Isolated Battery Management System (BMS) |
|---|---|
Use Scenario: Isolating PWM signals between MCU and high-voltage IGBT/SiC gate drivers in 3-phase inverters. IC Role / Device Role / Timing Role: Bidirectional digital isolator providing timing-critical, noise-immune signal transfer across 600–1200 V DC bus barriers. Use Value: 10 ns propagation delay and ≥100 kV/µs CMTI prevent shoot-through and ensure precise dead-time control. | Use Scenario: Communicating cell voltage and temperature data from high-side monitoring ICs to low-side host MCU in multi-module EV battery packs. IC Role / Device Role / Timing Role: 4-channel isolator carrying UART or SPI signals across reinforced insulation barrier between domains. Use Value: 6000 VRMS rating and –40 to +125 °C operation support long-term reliability in harsh pack environments. |
| Industrial PLC Digital I/O Module | Isolated Switch-Mode Power Supply Feedback |
Use Scenario: Providing galvanic isolation for discrete input/output signals in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Replacing optocouplers with higher speed, lower power, and longer lifetime digital isolation. Use Value: 150 Mbps capability enables fast status polling; 2.25–5.5 V supply range simplifies mixed-voltage board design. | Use Scenario: Isolating error amplifier output and synchronous rectifier control signals in 1–3 kW AC/DC converters. IC Role / Device Role / Timing Role: Transmitting analog-derived digital feedback across isolation boundary with minimal latency. Use Value: Default-low fail-safe mode ensures PWM disable during controller reset, preventing uncontrolled power delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRIZ | 4-channel, 150 Mbps, 2.5–5.5 V, 3750 VRMS, SOIC-16 NB | Limited to basic industrial use; lacks AEC-Q100 qualification and 6000 VRMS rating | Choose for cost-sensitive non-automotive designs where 3750 VRMS suffices |
| ISO7741FDWR | 4-channel, 100 Mbps, 2.25–5.5 V, 5000 VRMS, SOIC-16 WB | Lower data rate and isolation rating; no default-low fail-safe option | Prefer when lower CMTI (85 kV/µs) and absence of fail-safe mode are acceptable |
Compared with ADUM140D0BRIZ and ISO7741FDWR, SI86S642BC-AS1 delivers higher isolation (6000 VRMS), AEC-Q100 Grade 1 compliance, and guaranteed default-low behavior-making it uniquely suitable for automotive BMS and high-reliability industrial inverters where safety-critical state determinism is mandatory.
Availability
SI86S642BC-AS1 is available at Aetrix Electronics and suitable for industrial automation systems, battery management systems, and motor control applications requiring stable component supply across extended product lifecycles.
Supply support for SI86S642BC-AS1 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 to replace optocouplers in high-reliability, high-speed isolation applications across automotive, industrial, and medical markets-emphasizing low latency, high CMTI, and safety certification.
FAQ
What is the isolation voltage rating of SI86S642BC-AS1?
SI86S642BC-AS1 is rated for 6000 VRMS isolation per UL 1577 for 1 minute, with reinforced insulation certified to IEC 60747-17. This rating applies specifically to its WB SOIC-16 package and supports safety-critical applications such as EV traction inverters and medical equipment where high working voltage endurance is mandatory. The device maintains this rating across its full operating temperature range of –40 to +125 °C.
Does SI86S642BC-AS1 support fail-safe operation, and how is it configured?
Yes, SI86S642BC-AS1 implements a factory-configured fail-safe mode where outputs default to logic low when the input-side supply (VDD1) is unpowered but the output-side supply (VDD2) remains active. This behavior is encoded in the 'B' suffix of the part number and requires no external configuration. It ensures safe shutdown of downstream gate drivers or actuators during MCU power-up sequences or brownout events.
What are the supply voltage requirements for SI86S642BC-AS1?
SI86S642BC-AS1 operates with independent 2.25 V to 5.5 V supplies on both sides (VDD1 and VDD2). Each supply must be bypassed with 0.1 µF and 10 µF capacitors placed close to the respective VDD/GND pins. The device functions correctly with mismatched supplies-for example, 3.3 V on Side A and 5 V on Side B-enabling level-shifting without external translators.
How does SI86S642BC-AS1 achieve high noise immunity?
SI86S642BC-AS1 achieves ≥100 kV/µs common-mode transient immunity (CMTI) through its RF-based modulation architecture and integrated Schmitt-trigger inputs with 0.15×VDD hysteresis. Input noise pulses shorter than 36 ns are rejected without external filtering. The monolithic silicon dioxide isolation barrier provides inherent immunity to magnetic fields, unlike transformer-based isolators, making it ideal for high-di/dt environments like motor drives.
Is SI86S642BC-AS1 pin-compatible with other devices in the Si86S6xx family?
SI86S642BC-AS1 shares identical pinout and footprint with other Si86S64x variants (e.g., SI86S640, SI86S641) in the WB SOIC-16 package, including matching A1–A4, B1–B4, EN1, EN2, VDD1/GND1, and VDD2/GND2 assignments. However, functional differences exist-such as fail-safe default state and presence/absence of sleep mode-so electrical behavior must be verified against the specific ordering option before substitution.
SI86S642BC-AS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (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:
- 3750Vrms
- 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-SOIC
SI86S642BC-AS1 FAQ
1.How can I place an order for SI86S642BC-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S642BC-AS1 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 SI86S642BC-AS1 reliable?
The price and inventory of SI86S642BC-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S642BC-AS1 is usually 5 days.
3.What payment methods are accepted for SI86S642BC-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S642BC-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S642BC-AS1?
SI86S642BC-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S642BC-AS1 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 SI86S642BC-AS1?
For technical support, including SI86S642BC-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S642BC-AS1 requirements.
6.How does Aetrix verify that SI86S642BC-AS1 is sourced from the original manufacturer or authorized distributors?
All SI86S642BC-AS1 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 SI86S642BC-AS1 meets industry standards.
7.What is the process for return or replacement of SI86S642BC-AS1?
All SI86S642BC-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86S642BC-AS1, 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 SI86S642BC-AS1 part is unused and in its original packaging.
Return procedure for SI86S642BC-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S642BC-AS1 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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