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Skyworks Solutions Inc. SI86S621FE-AS4R
- Part No.:
- SI86S621FE-AS4R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S621FE-AS4R.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 2 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,472
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Product details
Overview
SI86S621FE-AS4R from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, 150 Mbps data rate, and AEC-Q100 qualification for automotive systems. It features Schmitt-trigger inputs, selectable fail-safe output (default low), and operates across 2.25–5.5 V supply rails. Used in battery management systems and traction inverters where galvanic separation and noise immunity are critical.
For engineers reviewing the SI86S621FE-AS4R datasheet, SI86S621FE-AS4R pinout, SI86S621FE-AS4R application, or SI86S621FE-AS4R equivalent, this page delivers verified timing specs (9 ns typical propagation delay), CMTI (100 kV/µs), fail-safe configuration, and SSO-8 package details - all confirmed from Skyworks' official 206552B datasheet dated August 17, 2023.
Technical Context
The SI86S621FE-AS4R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent UVLO and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.
It integrates input deglitch filtering (36 ns) and delivers precise timing: 9 ns typical propagation delay, ≤4.5 ns pulse width distortion, and ≤3 ns channel-to-channel skew. The device maintains 100 kV/µs common-mode transient immunity at ±1500 V, meeting reinforced insulation requirements per IEC 60747-17 and UL 1577.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - supports high-speed CAN FD, SPI, and isolated ADC interfaces without protocol overhead. |
| Propagation delay | 9 ns typical - enables tight timing control in motor gate drivers and real-time feedback loops. |
| Isolation rating | 6000 VRMS - certified for reinforced insulation in 600 VRMS working voltage systems per UL 1577 and VDE 60747-17. |
| CMTI | 100 kV/µs minimum - ensures reliable operation in noisy power inverter environments with fast dv/dt transients. |
| Supply range | 2.25–5.5 V - allows interoperability with 3.3 V microcontrollers and 5 V legacy logic without level-shifting. |
| Fail-safe mode | Default low output - guarantees safe state during VDD1 loss in BMS fault detection circuits. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive applications including onboard chargers and traction inverters. |
Pinout & Package
SI86S621FE-AS4R uses an SSO-8 (wide-body SOIC-8) package with 8.0 mm creepage/clearance, optimized for 6000 VRMS isolation. Pin 1 is VDD1; pins 2–3 are Side A I/O (A1, A2); pin 4 is GND1; pins 5–6 are Side B I/O (B1, B2); pin 7 is GND2; pin 8 is VDD2. No NC pins - all terminals are functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A power supply | Supplies isolated input-side circuitry; must be bypassed with 0.1 µF + 10 µF capacitors. |
| A1, A2 | Side A digital I/O | Dual-channel input signals with Schmitt-trigger thresholds and 36 ns deglitch filtering. |
| GND1 | Side A ground | Reference for Side A logic; must be separated from GND2 by ≥8.0 mm PCB clearance. |
| B1, B2 | Side B digital I/O | Dual-channel isolated outputs; default low during VDD1 undervoltage (fail-safe). |
| GND2 | Side B ground | Reference for Side B logic; forms isolation barrier with GND1. |
| VDD2 | Side B power supply | Supplies isolated output-side circuitry; independent of VDD1 for asymmetric rail designs. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift; achieves stable 150 Mbps performance over –40 to +125 °C. |
| Selectably fail-safe output | Factory-configured default-low state prevents undefined logic during input-side power loss in safety-critical BMS monitoring. |
| Input deglitch filter | 36 ns pulse rejection removes EMI-induced glitches from motor drive feedback signals before isolation. |
| Independent UVLO/reset per side | Enables asymmetric power sequencing - e.g., VDD2 powered before VDD1 - without output corruption. |
| AEC-Q100 Grade 1 | Validated for automotive use with zero defects in HTOL, TC, and ESD testing per JESD22 standards. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitor (CVM) SPI bus from MCU in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting sampled cell data and command signals across 400–800 V DC bus. Use Value: 6000 VRMS isolation and 100 kV/µs CMTI prevent false triggering during IGBT switching transients. |
Use Scenario: Galvanically separating gate driver control signals from high-side IGBTs in 3-phase motor inverters. IC Role / Device Role / Timing Role: Transmitting PWM enable/disable and fault feedback with <9 ns propagation delay for precise dead-time control. Use Value: 3 ns channel skew ensures matched timing across dual gate drive paths, minimizing shoot-through risk. |
| Onboard Charger (OBC) | Industrial PLC I/O Module |
|
Use Scenario: Isolating AC-DC controller communication (e.g., PFC and LLC stages) in bidirectional OBCs. IC Role / Device Role / Timing Role: Dual-channel data link between primary-side DSP and secondary-side analog front-end. Use Value: 150 Mbps bandwidth supports real-time current/voltage loop updates without latency bottlenecks. |
Use Scenario: Providing reinforced isolation for digital input channels in industrial programmable logic controllers. IC Role / Device Role / Timing Role: Conditioning and isolating 24 V DC sensor inputs before FPGA processing. Use Value: Schmitt-trigger inputs and 36 ns deglitching reject contact bounce and EFT noise in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM121N0BRZ-RL7 | 5000 VRMS isolation, 150 Mbps, but only 105 °C max operating temperature and no AEC-Q100 qualification. | Suitable for industrial automation but not automotive traction systems requiring full Grade 1 validation. | Choose ADUM121N0BRZ-RL7 when cost sensitivity outweighs automotive qualification and extended temperature needs. |
| ISO6721FDWR | 5000 VRMS isolation, 50 Mbps max data rate, 100 kV/µs CMTI, and 125 °C rating - no deglitch filter or fail-safe option. | Fits lower-speed isolated UART or I²C links, but cannot replace SI86S621FE-AS4R in 150 Mbps SPI or time-critical PWM paths. | Choose ISO6721FDWR only for non-automotive, lower-bandwidth applications where deglitching and fail-safe are unnecessary. |
Compared with ADUM121N0BRZ-RL7 and ISO6721FDWR, SI86S621FE-AS4R uniquely combines AEC-Q100 Grade 1, 6000 VRMS, 150 Mbps, and factory-configured fail-safe - making it the sole choice for automotive BMS and traction inverter signal isolation where safety certification and timing precision are mandatory.
Availability
SI86S621FE-AS4R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI86S621FE-AS4R 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 automotive and industrial isolation, emphasizing reinforced safety certification, high CMTI, and fail-safe behavior in harsh electromagnetic environments.
FAQ
What is the isolation voltage rating of SI86S621FE-AS4R?
SI86S621FE-AS4R is rated for 6000 VRMS isolation per UL 1577 for 1 minute, with reinforced insulation certification per VDE 60747-17 and CSA 62368-1. Its SSO-8 package provides 8.0 mm creepage and clearance, supporting up to 1500 VRMS working voltage in end equipment.
Does SI86S621FE-AS4R support fail-safe operation, and how is it configured?
Yes, SI86S621FE-AS4R has a factory-configured fail-safe mode that defaults outputs low during VDD1 undervoltage. This behavior is fixed per ordering code - "FE" denotes default-low configuration. No external components or register writes are needed to activate this safety feature in SI86S621FE-AS4R.
What is the maximum data rate supported by SI86S621FE-AS4R?
SI86S621FE-AS4R supports up to 150 Mbps data rate across both channels simultaneously. This is validated across the full operating temperature range (–40 to +125 °C) and supply range (2.25–5.5 V), with guaranteed minimum pulse width of 6.7 ns.
How does SI86S621FE-AS4R handle power-up sequencing between VDD1 and VDD2?
SI86S621FE-AS4R features independent UVLO and reset circuits per side. If VDD2 powers up before VDD1, outputs remain in fail-safe low state until VDD1 exceeds 2.18 V (UVLO+). Outputs transition to valid data only after both supplies stabilize - ensuring deterministic behavior during asymmetric sequencing in SI86S621FE-AS4R.
Is SI86S621FE-AS4R qualified for automotive applications?
Yes, SI86S621FE-AS4R is AEC-Q100 Grade 1 qualified (–40 to +125 °C), with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and full automotive manufacturing flow validation. It is approved for use in onboard chargers, battery management systems, and traction inverters per Skyworks' 206552B datasheet.
SI86S621FE-AS4R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si86S62x
- Package/Case:
- 8-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 6000Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 41.5ns, 41.5ns
- Pulse Width Distortion (Max):
- 2.5ns
- 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:
- 8-SSO
SI86S621FE-AS4R FAQ
1.How can I place an order for SI86S621FE-AS4R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S621FE-AS4R 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 SI86S621FE-AS4R reliable?
The price and inventory of SI86S621FE-AS4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S621FE-AS4R is usually 5 days.
3.What payment methods are accepted for SI86S621FE-AS4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S621FE-AS4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S621FE-AS4R?
SI86S621FE-AS4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S621FE-AS4R 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 SI86S621FE-AS4R?
For technical support, including SI86S621FE-AS4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S621FE-AS4R requirements.
6.How does Aetrix verify that SI86S621FE-AS4R is sourced from the original manufacturer or authorized distributors?
All SI86S621FE-AS4R 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 SI86S621FE-AS4R meets industry standards.
7.What is the process for return or replacement of SI86S621FE-AS4R?
All SI86S621FE-AS4R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S621FE-AS4R, 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 SI86S621FE-AS4R part is unused and in its original packaging.
Return procedure for SI86S621FE-AS4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S621FE-AS4R 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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