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Skyworks Solutions Inc. SI86S621BE-AS4R
- Part No.:
- SI86S621BE-AS4R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S621BE-AS4R.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 2 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
SI86S621BE-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 + CMOS 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 SI86S621BE-AS4R datasheet, SI86S621BE-AS4R pinout, SI86S621BE-AS4R application, or SI86S621BE-AS4R equivalent, this page delivers verified specifications, package mapping, functional context for isolated signal transmission, and validated alternative options for automotive and industrial power electronics design.
Technical Context
The SI86S621BE-AS4R implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity. Its dual-channel architecture supports independent side-A and side-B supplies (VDD1/VDD2), each with dedicated UVLO (2.18 V typ) and reset thresholds (~1.7 V).
It integrates input deglitch filters (36 ns), precise timing (9 ns typ propagation delay, 3.5 ns pulse width distortion), and high CMTI (100 kV/µs). Fail-safe operation defaults outputs low during VDD1 loss while maintaining valid logic on powered side-B-a key requirement for safety-critical motor control and BMS fault signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - enables high-fidelity SPI, CAN FD, or PWM feedback in real-time power converters |
| Propagation delay | 9 ns typical - ensures sub-10 ns timing alignment between isolated control and sensing paths |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for 1-min withstand |
| Supply voltage | 2.25–5.5 V - supports direct interface with 3.3 V microcontrollers and 5 V gate drivers without level-shifting |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive environments and industrial motor drives |
| CMTI | 100 kV/µs - rejects fast transients from IGBT switching in inverters without data corruption |
| Fail-safe mode | Default low output - provides safe shutdown state when side-A power fails in battery monitoring circuits |
Pinout & Package
SI86S621BE-AS4R uses an NB SOIC-8 package (3.9 mm creepage/clearance) with 8-pin layout optimized for reinforced isolation. Side-A (pins 1–4) and Side-B (pins 5–8) are physically separated by the internal isolation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side-A power supply | Supplies isolated input-side logic; must be bypassed with 0.1 µF + 10 µF capacitors |
| GND1 | Side-A ground reference | Return path for side-A signals; must be kept separate from GND2 to maintain isolation integrity |
| A1, A2 | Digital inputs (side-A) | Schmitt-trigger + CMOS threshold inputs; accept 2.25–5.5 V logic levels with 36 ns deglitch filtering |
| NC | No-connect | Pin 3 is unconnected internally; must remain floating and unpopulated on PCB |
| GND2 | Side-B ground reference | Return path for side-B outputs; electrically isolated from GND1 |
| B1, B2 | Digital outputs (side-B) | CMOS outputs with ~50 Ω impedance; default low during side-A power loss per ordering option |
| VDD2 | Side-B power supply | Supplies isolated output-side logic; independent of VDD1 for true galvanic separation |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates startup initialization delay and avoids LED aging or capacitor drift issues inherent in optocouplers |
| Selectably fail-safe output | Factory-configured default-low behavior ensures controlled shutdown in BMS fault detection circuits |
| Input deglitch filter | 36 ns pulse rejection prevents false triggering from EMI in high-noise motor drive environments |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including onboard chargers and traction inverters up to +125 °C |
| Reinforced insulation certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1 - enables single-component compliance in medical and industrial safety standards |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADC outputs from MCU domain in EV battery packs. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting sampled analog front-end data across high-voltage barriers with <9 ns channel-to-channel skew. Use Value: Enables accurate SOC estimation under fast transient conditions via 150 Mbps throughput and 100 kV/µs CMTI immunity. |
Use Scenario: Transmitting PWM gate-drive signals from controller to IGBT/SiC half-bridge drivers in 400–800 V inverters. IC Role / Device Role / Timing Role: High-speed digital isolator delivering synchronized, low-skew gate commands with fail-safe low default during controller reset. Use Value: Prevents shoot-through faults during power-up/down sequences and maintains system safety during supply brownouts. |
| Industrial PLC I/O Module | Medical Isolated Data Acquisition |
|
Use Scenario: Galvanically isolating digital input/output channels in programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Dual-channel isolator interfacing 24 V field sensors/actuators to 3.3 V logic with wide 2.25–5.5 V supply tolerance. Use Value: Reduces external BOM count by eliminating level shifters and supports mixed-voltage backplane designs. |
Use Scenario: Isolating patient-connected sensor signals (ECG, EEG) from processing unit in diagnostic equipment. IC Role / Device Role / Timing Role: Reinforced-insulation isolator meeting 2 MOPP per IEC 60601-1 for patient protection in analog front-end digitization paths. Use Value: Achieves certified safety compliance without external isolation transformers or discrete optocoupler arrays. |
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 |
|---|---|---|---|
| ADUM121N1BRZ-RL7 | 5000 VRMS isolation, 150 Mbps, default-high fail-safe, SOIC-8 (standard body) | Lacks AEC-Q100 qualification; lower creepage (3.2 mm) limits use in high-voltage automotive systems | Preferred for cost-sensitive industrial I/O where reinforced 6 kVRMS and automotive qualification are not required |
| ISO7721DR | 5000 VRMS isolation, 100 Mbps, default-low fail-safe, SOIC-8 (standard body), no deglitch filter | Lower CMTI (85 kV/µs); not AEC-Q100 qualified; lacks 36 ns input filtering for noisy motor control environments | Suitable for non-automotive isolated communication links where 100 Mbps suffices and EMI is moderate |
Compared with ADUM121N1BRZ-RL7 and ISO7721DR, SI86S621BE-AS4R delivers higher isolation voltage (6000 vs. 5000 VRMS), automotive-grade reliability (AEC-Q100), and integrated 36 ns deglitching-making it uniquely suited for safety-critical BMS and traction inverter signal isolation where transient immunity and fail-safe behavior are mandatory.
Availability
SI86S621BE-AS4R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI86S621BE-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 leader in high-performance analog semiconductors, specializing in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
The Si86S6xx family was designed specifically for high-reliability, high-speed galvanic isolation in automotive electrification and industrial power systems-emphasizing AEC-Q100 compliance, reinforced safety certification, and RF-based noise immunity.
FAQ
What is the isolation voltage rating of SI86S621BE-AS4R?
SI86S621BE-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. This enables use in high-voltage automotive and industrial systems where basic or reinforced insulation is mandated by end-equipment safety standards.
Does SI86S621BE-AS4R require external startup initialization?
No, SI86S621BE-AS4R requires no startup initialization due to its RF-based modulation architecture. It begins transmitting valid data within 300 µs of VDD application, with outputs held low by internal 100 kΩ pulldowns until stabilization-ensuring deterministic behavior in safety-critical automotive applications.
What is the function of the NC pin on SI86S621BE-AS4R?
Pin 3 on SI86S621BE-AS4R is marked NC (no connect) and is unconnected internally. It must remain unpopulated and floating on the PCB layout to preserve isolation barrier integrity and meet creepage/clearance requirements specified for the NB SOIC-8 package.
How does the fail-safe mode operate in SI86S621BE-AS4R?
SI86S621BE-AS4R is ordered with default-low fail-safe mode. When VDD1 is lost while VDD2 remains active, outputs B1/B2 are driven low-providing a known safe state for downstream gate drivers or fault-handling logic in battery management and motor control systems.
Is SI86S621BE-AS4R compatible with 3.3 V and 5 V logic interfaces?
Yes, SI86S621BE-AS4R supports 2.25–5.5 V supply ranges on both sides, enabling direct connection to 3.3 V microcontrollers and 5 V gate drivers without level translation. Input thresholds scale with VDD (VIH = 0.7×VDD, VIL = 0.3×VDD), ensuring robust interoperability across mixed-voltage systems.
SI86S621BE-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):
- 100kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13.5ns, 13.5ns
- 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
SI86S621BE-AS4R FAQ
1.How can I place an order for SI86S621BE-AS4R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S621BE-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 SI86S621BE-AS4R reliable?
The price and inventory of SI86S621BE-AS4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S621BE-AS4R is usually 5 days.
3.What payment methods are accepted for SI86S621BE-AS4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S621BE-AS4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S621BE-AS4R?
SI86S621BE-AS4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S621BE-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 SI86S621BE-AS4R?
For technical support, including SI86S621BE-AS4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S621BE-AS4R requirements.
6.How does Aetrix verify that SI86S621BE-AS4R is sourced from the original manufacturer or authorized distributors?
All SI86S621BE-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 SI86S621BE-AS4R meets industry standards.
7.What is the process for return or replacement of SI86S621BE-AS4R?
All SI86S621BE-AS4R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S621BE-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 SI86S621BE-AS4R part is unused and in its original packaging.
Return procedure for SI86S621BE-AS4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S621BE-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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