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Skyworks Solutions Inc. SI86SO21BE-IS4
- Part No.:
- SI86SO21BE-IS4
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SO21BE-IS4.pdf
- Description:
- 6.0 KVRMS INVERTING OUTPUT ISOLA
- Quantity:
- Payment:
- Shipping:
Inventory:3,053
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Product details
Overview
SI86SO21BE-IS4 from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, AEC-Q100 qualified for automotive use, supporting up to 150 Mbps data rate, 10 ns typical propagation delay, and fail-safe default-low output mode. It enables isolated communication between microcontrollers and gate drivers in traction inverters and battery management systems.
For engineers reviewing the SI86SO21BE-IS4 datasheet, SI86SO21BE-IS4 pinout, SI86SO21BE-IS4 application, or SI86SO21BE-IS4 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade safety certifications (UL 1577, VDE 60747-17, CSA 62368-1), and real-world timing behavior under UVLO and power-loss conditions.
Technical Context
The SI86SO21BE-IS4 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and providing superior noise immunity over pulse-based schemes. Its dual-channel architecture supports independent side-A (VDD1/GND1) and side-B (VDD2/GND2) power domains with Schmitt-trigger CMOS inputs and 50 Ω nominal output impedance.
It features integrated undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V) and reset circuitry (RSTB+ ≈ 1.7 V) per side, enabling deterministic fail-safe operation during partial power loss. The device achieves 100 kV/µs common-mode transient immunity (CMTI) and supports 2.25–5.5 V supply range on both sides.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - supports high-speed SPI, CAN FD, and PWM feedback loops without timing bottlenecks |
| Propagation delay | 9 ns typical - enables sub-10 ns timing-critical control paths in motor gate drivers |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements for 1000 VDC bus systems per UL 1577 |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive environments and industrial inverters |
| Supply voltage | 2.25–5.5 V per side - interoperable with 3.3 V MCU logic and 5 V analog subsystems |
| CMTI | 100 kV/µs - prevents false triggering during fast-switching transients in SiC/GaN power stages |
| Fail-safe mode | Default low output - ensures safe shutdown of downstream drivers when VDD1 is unpowered |
Pinout & Package
SI86SO21BE-IS4 uses an NB SOIC-8 package (3.9 mm creepage/clearance) with reinforced insulation barrier separating side-A and side-B pins. Pin 1 is VDD1; pin 8 is VDD2; pins 2–3 are side-A I/O; pins 6–7 are side-B I/O; pins 4 and 5 are GND1 and GND2 respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side-A power supply | Supplies internal RF transmitter and input logic; must be bypassed with 0.1 µF + 10 µF capacitors |
| GND1 | Side-A ground reference | Return path for side-A signals; requires low-inductance connection to minimize ground bounce |
| A1, A2 | Side-A digital inputs | Schmitt-trigger CMOS inputs with 0.15×VDD hysteresis; tolerate 36 ns noise glitches |
| GND2 | Side-B ground reference | Isolated return for side-B outputs; must be separated from GND1 by ≥3.9 mm PCB clearance |
| B1, B2 | Side-B digital outputs | Inverting outputs with 50 Ω driver impedance; require controlled-impedance routing for >50 Mbps |
| VDD2 | Side-B power supply | Supplies RF receiver and output driver; independent of VDD1 for true galvanic isolation |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot-time delays-output valid within 300 µs of power application |
| Selectable fail-safe output | Factory-configured default-low state ensures gate drivers disable safely during MCU power loss |
| High CMTI immunity | 100 kV/µs rejection of fast dv/dt transients prevents mis-triggering in 100 kHz+ SiC inverter switching |
| Wide supply range | 2.25–5.5 V operation on both sides enables direct interface with 3.3 V MCUs and 5 V ADCs without level shifters |
| AEC-Q100 qualification | Grade 0 qualification (–40 to +125 °C) with PPAP support confirms suitability for traction inverter control modules |
Applications
| Motor Control Systems | Onboard Chargers (OBC) |
|---|---|
|
Use Scenario: Isolating PWM signals from MCU to half-bridge gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting complementary high-side/low-side gate drive signals with matched propagation delay (<3 ns skew). Use Value: Prevents shoot-through by ensuring precise timing alignment and blocking fault currents during DC-link overvoltage events. |
Use Scenario: Signal isolation between primary-side controller and secondary-side monitoring in bidirectional OBCs. IC Role / Device Role / Timing Role: Transferring isolated voltage/current feedback and enable commands across 1000 VDC isolation barrier. Use Value: Enables compliance with IEC 62109 and UL 62368-1 reinforced insulation requirements while maintaining <10 ns timing fidelity. |
| Battery Management Systems (BMS) | Industrial PLC I/O Modules |
|
Use Scenario: Isolating cell voltage measurement data and balancing commands between battery pack and master controller. IC Role / Device Role / Timing Role: Providing galvanic separation for UART or SPI communication across 6000 VRMS barrier in multi-string packs. Use Value: Eliminates ground loop errors in stacked-cell monitoring and sustains operation during pack-level fault conditions. |
Use Scenario: Isolating digital input/output signals between field-side sensors/actuators and PLC CPU backplane. IC Role / Device Role / Timing Role: Replacing optocouplers in 24 VDC discrete I/O modules requiring 150 Mbps update rates. Use Value: Reduces power consumption by 60% vs legacy optos and extends MTBF beyond 1 million hours at 125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM121N0BRZ-RL7 | Single-channel, 150 Mbps, 3000 VRMS isolation, no AEC-Q100 qualification | Lacks dual-channel integration and automotive qualification; suitable only for non-automotive industrial use | Choose only if single-channel count and lower isolation voltage suffice and automotive qualification is unnecessary |
| ISO7721DWR | Dual-channel, 100 Mbps, 5000 VRMS, AEC-Q100 Grade 1 (–40 to +125 °C), no default-low fail-safe option | Lower data rate limits high-frequency PWM feedback; lacks factory-set default-low output for safe shutdown | Prefer when cost sensitivity outweighs need for 150 Mbps or deterministic low-state fail-safe behavior |
Compared with ADUM121N0BRZ-RL7 and ISO7721DWR, SI86SO21BE-IS4 uniquely combines dual-channel 150 Mbps operation, 6000 VRMS reinforced isolation, AEC-Q100 Grade 0 qualification, and factory-configured default-low fail-safe mode-making it the only option qualified for high-reliability automotive traction inverter control.
Availability
SI86SO21BE-IS4 is available at Aetrix Electronics and suitable for automotive battery management systems, industrial motor drives, and isolated power supply monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SI86SO21BE-IS4 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 for high-performance wireless and power systems.
The Si86S61x/S62x/SOx family was designed specifically for automotive and industrial applications demanding high-speed, high-isolation, and fail-safe digital signal transfer across noisy high-voltage domains.
FAQ
What is the isolation voltage rating of the SI86SO21BE-IS4 and which standards does it meet?
The SI86SO21BE-IS4 provides 6000 VRMS isolation per UL 1577 for 1 minute, with reinforced insulation certification to VDE 60747-17 (2121 Vpeak), CSA 62368-1 (600 VRMS working voltage), and CQC GB4943.1. These ratings are validated for the NB SOIC-8 package and apply directly to the SI86SO21BE-IS4 part number as shipped.
Does the SI86SO21BE-IS4 support fail-safe operation, and how is it configured?
Yes, the SI86SO21BE-IS4 is factory-configured for default-low fail-safe output mode. When VDD1 is unpowered but VDD2 remains active, outputs B1 and B2 are actively driven low-ensuring safe deactivation of downstream gate drivers or protection circuits. This behavior is fixed per ordering code and cannot be changed in-circuit.
What are the supply voltage requirements for reliable operation of the SI86SO21BE-IS4?
The SI86SO21BE-IS4 operates with VDD1 and VDD2 independently rated from 2.25 V to 5.5 V. Undervoltage lockout triggers at VDD = 2.18 V (rising) and 2.05 V (falling), with full functionality restored only above 2.25 V. Both supplies must remain within this range during normal operation to maintain timing specs and isolation integrity.
How does the SI86SO21BE-IS4 handle power loss on the input side during system operation?
When VDD1 drops below 2.05 V, the SI86SO21BE-IS4 enters UVLO and forces outputs B1/B2 low within 12 ns (tSD). If VDD1 falls further below ~1.7 V, a full reset occurs and device configuration reloads upon recovery. This ensures deterministic, low-latency fail-safe response without external supervision circuits.
Is the SI86SO21BE-IS4 pin-compatible with other devices in the Si86S6x/SOx family?
No-SI86SO21BE-IS4 has a unique pinout optimized for its dual-channel inverting function and default-low configuration. While sharing the NB SOIC-8 footprint with Si86S621xx variants, pin assignments differ: SI86SO21BE-IS4 places A1/A2 on pins 2/3 and B1/B2 on pins 6/7, whereas Si86S621xx uses pins 2/3 for A1/NC and pins 6/7 for B1/B2. PCB layout must match SI86SO21BE-IS4 specifically.
SI86SO21BE-IS4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si86SOx
- Package/Case:
- 8-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SSO
SI86SO21BE-IS4 FAQ
1.How can I place an order for SI86SO21BE-IS4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SO21BE-IS4 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 SI86SO21BE-IS4 reliable?
The price and inventory of SI86SO21BE-IS4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SO21BE-IS4 is usually 5 days.
3.What payment methods are accepted for SI86SO21BE-IS4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SO21BE-IS4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SO21BE-IS4?
SI86SO21BE-IS4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SO21BE-IS4 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 SI86SO21BE-IS4?
For technical support, including SI86SO21BE-IS4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SO21BE-IS4 requirements.
6.How does Aetrix verify that SI86SO21BE-IS4 is sourced from the original manufacturer or authorized distributors?
All SI86SO21BE-IS4 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 SI86SO21BE-IS4 meets industry standards.
7.What is the process for return or replacement of SI86SO21BE-IS4?
All SI86SO21BE-IS4 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SO21BE-IS4, 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 SI86SO21BE-IS4 part is unused and in its original packaging.
Return procedure for SI86SO21BE-IS4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SO21BE-IS4 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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