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Skyworks Solutions Inc. SI86S642FE-AS2R
- Part No.:
- SI86S642FE-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S642FE-AS2R.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 4 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,480
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Product details
Overview
SI86S642FE-AS2R from Skyworks Solutions is a 4-channel, reinforced-isolation digital isolator with bidirectional signal capability, 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating. It operates across 2.25–5.5 V supplies on both sides and supports fail-safe default-high output mode for industrial motor control and isolated ADC interfaces.
For engineers reviewing the SI86S642FE-AS2R datasheet, SI86S642FE-AS2R pinout, SI86S642FE-AS2R application, or SI86S642FE-AS2R equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in automotive battery management and industrial automation, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The SI86S642FE-AS2R implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI). It features independent undervoltage lockout (UVLO) and reset circuitry per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO+ at 2.18 V.
All four channels support bidirectional operation via dedicated enable pins (EN1, EN2) and Schmitt-trigger CMOS inputs. The device includes 36 ns input deglitch filtering and selectable fail-safe mode-default high output during unpowered conditions on the input side while output side remains powered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed serial links including isolated SPI and QSPI bus extensions. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for safety-critical systems. |
| Propagation delay | 10 ns typical - enables precise timing synchronization in motor gate drivers and real-time feedback loops. |
| Supply voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level-shifting components. |
| Fail-safe mode | Default high output - ensures safe state assertion (e.g., disable signal active) during VDD1 loss in power converter control. |
| Input deglitch | 36 ns filter - suppresses sub-36 ns transients common in noisy industrial environments like VFDs and inverters. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions without derating. |
Pinout & Package
SI86S642FE-AS2R is housed in a WB SOIC-16 (wide-body small-outline integrated circuit) package with creepage/clearance optimized for 6000 VRMS reinforced isolation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A supply | Power for input-side logic and transmitter circuits; bypass requires 0.1 µF + 10 µF capacitors. |
| GND1 | Side A ground | Reference return for VDD1; must be routed separately from GND2 to maintain isolation integrity. |
| A1–A4 | Side A I/O | Bidirectional digital channels; Schmitt-trigger inputs ensure noise margin >15% of VDDx. |
| EN1 | Side A enable | Active-high control: drives all A-side outputs to high-impedance when low, enabling tri-state bus sharing. |
| Isolation Barrier | Internal die boundary | Robust semiconductor barrier providing 6000 VRMS withstand and 100 kV/µs transient immunity. |
| B1–B4 | Side B I/O | Corresponding isolated outputs/inputs; electrically independent from A-side with separate VDD2/GND2. |
| EN2 | Side B enable | Active-high control: places B-side outputs in high-Z state, supporting isolated multi-drop configurations. |
| VDD2 / GND2 | Side B supply | Independent power domain for output-side logic; enables galvanic separation between controller and power stage. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot sequence delays-output follows input immediately after UVLO exit. |
| Tri-state outputs with enable | EN1/EN2 provide per-side output disable, enabling shared-bus architectures without external bus switches. |
| Selectable fail-safe mode | Ordering option "FE" specifies default-high output during VDD1 loss-critical for fail-safe shutdown in inverters. |
| 36 ns input deglitch filter | Hardware filter rejects EFT bursts and switching noise below 36 ns width, reducing firmware validation burden. |
| AEC-Q100 qualified | Qualified to Grade 1 (–40 to +125 °C) with automotive-specific manufacturing flow-valid for OBC and BMS applications. |
Applications
| Industrial Motor Control | Automotive Onboard Charger (OBC) |
|---|---|
|
Use Scenario: Isolating gate driver signals between MCU and 3-phase IGBT/SiC modules in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional channel isolator transmitting PWM enable/disable and fault feedback across 6000 VRMS barrier. Use Value: 10 ns propagation delay ensures <100 ns total timing skew across all 4 channels-preserving dead-time integrity in high-frequency switching. |
Use Scenario: Separating 3.3 V microcontroller domain from 400–800 V DC-link monitoring and AC-DC control in EV onboard chargers. IC Role / Device Role / Timing Role: Isolating analog front-end ADC references and digital status lines between primary and secondary sides. Use Value: Reinforced 6000 VRMS rating satisfies IEC 62109 and UL 62368-1 requirements for double-insulation in Class II OBC designs. |
| Isolated Data Acquisition | Battery Management System (BMS) |
|
Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC130x) to host processors in high-voltage energy storage systems. IC Role / Device Role / Timing Role: Transmitting oversampled bitstream and clock across isolation barrier with minimal jitter addition. Use Value: 150 Mbps data rate supports 20 MSPS bitstream transfer from 24-bit ADCs without decimation bottlenecks. |
Use Scenario: Isolating cell monitor IC communication (e.g., BQ796xx daisy-chain) from main system MCU in 400 V+ traction battery packs. IC Role / Device Role / Timing Role: Providing fault signaling, thermal alerts, and balancing command isolation with fail-safe default-high assertion. Use Value: Default-high fail-safe mode ensures open-circuit alert remains asserted during MCU power interruption-preventing silent cell overvoltage. |
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, no deglitch filter, 15 ns propagation delay. | Lacks 36 ns input filtering and 6000 VRMS rating-requires additional external protection in high-noise 600 V+ systems. | Preferred where cost sensitivity outweighs need for highest CMTI or reinforced isolation. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, 16 ns propagation delay, no fail-safe selection option. | Lower speed and fixed default-low output limit use in fast-switching motor control and safety-critical shutdown paths. | Valid for non-safety-critical industrial PLC I/O where 50 Mbps suffices and default-low behavior is acceptable. |
Compared with ADUM4402BRWZ and ISO6741FDWR, SI86S642FE-AS2R delivers higher isolation voltage, faster timing, hardware deglitching, and configurable fail-safe behavior-making it uniquely suitable for automotive-grade OBCs and industrial inverters requiring certified reinforced insulation and deterministic fault response.
Availability
SI86S642FE-AS2R is available at Aetrix Electronics and suitable for industrial motor control, automotive onboard chargers, and isolated data acquisition systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for SI86S642FE-AS2R 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, with leadership in RF, timing, and isolation technologies.
The Si86S6xx family was designed specifically for high-reliability industrial and automotive isolation needs-emphasizing reinforced safety certification, ultra-low propagation delay, and robust electromagnetic immunity in harsh environments.
FAQ
What is the isolation voltage rating of SI86S642FE-AS2R and which safety standards does it meet?
SI86S642FE-AS2R provides 6000 VRMS reinforced isolation for 1 minute per UL 1577, and is certified to IEC 60747-17, CSA 62368-1/60601-1, and CQC GB4943.1. This rating enables its use in medical equipment, industrial inverters, and EV charging systems where double insulation is mandated by end-equipment safety standards.
Does SI86S642FE-AS2R require external startup configuration or initialization code?
No, SI86S642FE-AS2R requires no startup initialization. Its RF-based modulation architecture begins passing signals immediately after VDD1 and VDD2 exceed their respective UVLO+ thresholds (~2.18 V), with outputs transitioning to the correct logic state within 0.3 ms-eliminating firmware boot dependencies.
How does the fail-safe mode work on SI86S642FE-AS2R, and how is it configured?
The "FE" in SI86S642FE-AS2R denotes factory-configured default-high fail-safe mode. When VDD1 is unpowered but VDD2 remains active, all B-side outputs default to logic high-enabling safe shutdown in motor gate drivers or alarm assertion in BMS fault chains without external pull-ups.
What is the purpose of the 36 ns input deglitch filter in SI86S642FE-AS2R?
The 36 ns hardware deglitch filter blocks noise pulses shorter than 36 ns-common in VFDs, SMPS, and relay switching-preventing false triggering of downstream logic. Input pulses ≥36 ns pass through with only 36 ns added delay, preserving signal integrity without software debouncing.
Can SI86S642FE-AS2R support bidirectional communication on all four channels simultaneously?
Yes, SI86S642FE-AS2R supports full bidirectional operation on all four channels. Each A/B pair operates independently, with direction controlled implicitly by driving the corresponding side's input while reading the opposite side's output-no external DIR pin required unlike QSPI-specific variants.
SI86S642FE-AS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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:
- 6000Vrms
- 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
SI86S642FE-AS2R FAQ
1.How can I place an order for SI86S642FE-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S642FE-AS2R 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 SI86S642FE-AS2R reliable?
The price and inventory of SI86S642FE-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S642FE-AS2R is usually 5 days.
3.What payment methods are accepted for SI86S642FE-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S642FE-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S642FE-AS2R?
SI86S642FE-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S642FE-AS2R 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 SI86S642FE-AS2R?
For technical support, including SI86S642FE-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S642FE-AS2R requirements.
6.How does Aetrix verify that SI86S642FE-AS2R is sourced from the original manufacturer or authorized distributors?
All SI86S642FE-AS2R 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 SI86S642FE-AS2R meets industry standards.
7.What is the process for return or replacement of SI86S642FE-AS2R?
All SI86S642FE-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S642FE-AS2R, 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 SI86S642FE-AS2R part is unused and in its original packaging.
Return procedure for SI86S642FE-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S642FE-AS2R 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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