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Skyworks Solutions Inc. SI86SO21BE-AS4
- Part No.:
- SI86SO21BE-AS4
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SO21BE-AS4.pdf
- Description:
- 6.0 KVRMS INVERTING OUTPUT ISOLA
- Quantity:
- Payment:
- Shipping:
Inventory:3,862
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Product details
Overview
SI86SO21BE-AS4 from Skyworks Solutions is a dual-channel, inverting 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 high CMTI (>100 kV/µs) and thermal robustness (–40 to +125 °C) are critical.
For engineers reviewing the SI86SO21BE-AS4 datasheet, SI86SO21BE-AS4 pinout, SI86SO21BE-AS4 application, or SI86SO21BE-AS4 equivalent, this page delivers verified specifications, validated pin functions, automotive-grade safety certifications (UL, VDE, CSA), and real-world timing behavior-including 9 ns typical propagation delay, 3.5 ns pulse width distortion, and 300 µs start-up time-essential for isolated gate drive and ADC interface design.
Technical Context
The SI86SO21BE-AS4 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling deterministic timing without clock recovery. Its architecture delivers best-in-class noise immunity via 100 kV/µs common-mode transient immunity and integrated Schmitt-trigger inputs with 0.15×VDD hysteresis.
This device supports independent undervoltage lockout (UVLO) and reset per side (VDD1/VDD2), with UVLO thresholds of 2.10–2.25 V (rising) and 1.98–2.12 V (falling). Fail-safe operation defaults outputs low during input-side power loss-a confirmed ordering option for SI86SO21BE-AS4-and is implemented via internal pulldown resistors active during unpowered states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - supports high-speed CAN FD, SPI, and isolated ADC sampling interfaces without protocol overhead. |
| Propagation delay | 5–13.5 ns - enables precise timing-critical applications like motor phase control and synchronous rectification. |
| Pulse width distortion | ≤4.5 ns - ensures minimal duty-cycle degradation in PWM signal isolation for gate drivers. |
| Common-mode transient immunity | ≥100 kV/µs - maintains signal integrity in noisy high-dV/dt environments such as IGBT/SiC inverter switching nodes. |
| Isolation voltage | 6000 VRMS - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for 600 VAC systems. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive use including onboard chargers and battery electric vehicle inverters. |
| Supply voltage range | 2.25–5.5 V - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
Pinout & Package
SI86SO21BE-AS4 uses an NB SOIC-8 package (3.9 mm creepage/clearance) with reinforced insulation barrier separating Side A (VDD1/GND1/A1/A2) and Side B (VDD2/GND2/B1/B2). Pin 3 (A2) and Pin 6 (B1) are functional I/O; Pin 4 is NC (no connect) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A power supply | Supplies isolated input-side logic; requires 0.1 µF + 10 µF bypass capacitors placed adjacent to pin. |
| GND1 | Side A ground reference | Reference for A1/A2 inputs; must be separated from GND2 by ≥3.9 mm PCB clearance per safety standards. |
| A1, A2 | Digital inputs (Side A) | Inverting channels: high input yields low output; Schmitt-trigger thresholds reject <36 ns noise pulses. |
| NC | No connect | Pin 4 is internally unconnected; must not be soldered or routed to avoid compromising isolation barrier integrity. |
| GND2 | Side B ground reference | Reference for B1/B2 outputs; forms safety barrier with GND1; trace separation critical for 6000 VRMS rating. |
| B1, B2 | Digital outputs (Side B) | Inverting outputs: default low during VDD1 power loss; 50 Ω nominal output impedance for controlled-impedance PCB routing. |
| VDD2 | Side B power supply | Supplies isolated output-side logic; independent UVLO monitoring prevents erroneous state transitions during brownout. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting dual-channel logic | Output state is logical inverse of input; eliminates external inverters in feedback loops and dead-time control circuits. |
| Selectable fail-safe mode (default low) | Guarantees B1/B2 = low when VDD1 is absent-critical for safe shutdown in battery disconnect and fault-handling systems. |
| RF modulation architecture | No start-up initialization required; achieves valid output within 300 µs of power application-enables fast system wake-up. |
| AEC-Q100 Grade 0 qualification | Validated for automotive applications up to +125 °C ambient; includes PPAP documentation and IMDS/CAMDS compliance support. |
| Reinforced insulation certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1, and CQC GB4943.1-enables single-component isolation in medical and EV safety-critical designs. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitor (CVM) SPI bus from MCU in high-voltage battery packs (up to 900 V). IC Role / Device Role / Timing Role: Dual-channel inverting isolator transmits sampled cell data while blocking high-voltage transients between pack and controller domains. Use Value: 100 kV/µs CMTI prevents data corruption during pack switching events; 6000 VRMS rating satisfies IEC 61851-23 reinforced insulation for EV charging systems. |
Use Scenario: Transmitting PWM signals from MCU to isolated gate drivers in SiC-based traction inverters. IC Role / Device Role / Timing Role: Inverting isolator conveys complementary PWM pairs with matched channel-to-channel skew ≤3 ns for precise dead-time control. Use Value: 9 ns typical propagation delay and ≤4.5 ns pulse width distortion preserve PWM fidelity; –40 to +125 °C operation supports under-hood placement. |
| Onboard Charger (OBC) | Isolated ADC Interface |
|
Use Scenario: Isolating communication lines (UART/RS-485) between OBC primary-side controller and secondary-side DC-DC supervisor. IC Role / Device Role / Timing Role: Dual-channel isolator provides galvanic separation for bidirectional status reporting and fault signaling across 400–800 V DC link. Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime; 2.25–5.5 V supply range accommodates both 3.3 V and 5 V controller domains. |
Use Scenario: Isolating serial interface of isolated delta-sigma ADC (e.g., AMC130x) in motor current sensing circuits. IC Role / Device Role / Timing Role: Inverting isolator transmits oversampled bitstream with minimal jitter (<350 ps peak eye diagram jitter) for accurate current reconstruction. Use Value: Low 50 Ω output impedance enables direct connection to ADC's differential input; Schmitt-trigger inputs suppress EMI-induced glitches on long traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI86SO20BE-AS4 | Non-inverting dual-channel variant; identical pinout, timing, and isolation specs. | Suitable where logic polarity must be preserved (e.g., non-inverting feedback paths). | Select SI86SO20BE-AS4 only when inverting behavior is undesirable; otherwise SI86SO21BE-AS4 provides optimal match for fail-safe low-default systems. |
| ADUM120N1BRZ-RL7 | Non-AEC-Q100, 150 Mbps, 3000 VRMS isolation, SOIC-8; lacks reinforced certification and automotive qualification. | Limited to industrial automation or non-safety-critical consumer applications. | Use ADUM120N1BRZ-RL7 only in cost-sensitive, non-automotive designs where 6000 VRMS and AEC-Q100 are not required. |
Compared with SI86SO21BE-AS4, SI86SO20BE-AS4 preserves input logic polarity but offers identical timing and safety specs, while ADUM120N1BRZ-RL7 reduces isolation rating and automotive compliance-making it unsuitable for EV traction or BMS use cases requiring reinforced insulation and Grade 0 operation.
Availability
SI86SO21BE-AS4 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply, automotive-grade lifecycle assurance, and certified reinforced isolation.
Supply support for SI86SO21BE-AS4 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-reliability applications.
The Si86S61x/S62x/SOx family was designed specifically for automotive and industrial isolation needs-delivering RF-based digital isolation with AEC-Q100 qualification, reinforced safety ratings, and ultra-low propagation delay for next-generation EV power systems.
FAQ
What is the default output state of SI86SO21BE-AS4 during input-side power loss?
The SI86SO21BE-AS4 is ordered with selectable fail-safe mode; this specific part number is configured for default-low output. When VDD1 is unpowered and VDD2 remains active, B1 and B2 outputs are actively pulled low-ensuring safe shutdown in battery disconnect scenarios. This behavior is hard-coded per ordering option and does not require external components.
Does SI86SO21BE-AS4 require external startup initialization or configuration?
No, SI86SO21BE-AS4 requires no startup initialization. Its RF modulation architecture begins transmitting valid data within 300 µs of VDD1/VDD2 application. The device enters normal operation automatically after UVLO release, with no firmware, register writes, or external timing signals needed-reducing system boot complexity in automotive ECUs.
What safety certifications apply to SI86SO21BE-AS4?
SI86SO21BE-AS4 holds pending UL 1577 recognition (6000 VRMS), VDE 60747-17 (reinforced insulation), CSA 62368-1 and 60601-1, and CQC GB4943.1 approvals. These cover working voltages up to 1500 VRMS (SSO-8) and 445 VRMS (NB SOIC-8), enabling use in medical and EV applications requiring two means of patient protection (2 MOPP) or reinforced insulation.
Can SI86SO21BE-AS4 operate with mismatched supply voltages on Side A and Side B?
Yes, SI86SO21BE-AS4 supports independent 2.25–5.5 V supplies on VDD1 and VDD2. For example, Side A may run at 3.3 V (MCU interface) while Side B runs at 5 V (gate driver logic), with full timing and isolation performance maintained. Each side has its own UVLO and reset circuitry, ensuring robust operation during asymmetric brownouts.
What is the maximum data rate supported by SI86SO21BE-AS4, and under what conditions?
SI86SO21BE-AS4 supports up to 150 Mbps across its full operating temperature range (–40 to +125 °C) and supply range (2.25–5.5 V). This rate is guaranteed with CL = 15 pF loads and applies to both channels simultaneously-verified in datasheet Table 6 (VDD = 5.0 V) and Table 7 (VDD = 3.3 V), with no derating required for automotive thermal conditions.
SI86SO21BE-AS4 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SSO
SI86SO21BE-AS4 FAQ
1.How can I place an order for SI86SO21BE-AS4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SO21BE-AS4 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-AS4 reliable?
The price and inventory of SI86SO21BE-AS4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SO21BE-AS4 is usually 5 days.
3.What payment methods are accepted for SI86SO21BE-AS4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SO21BE-AS4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SO21BE-AS4?
SI86SO21BE-AS4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SO21BE-AS4 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-AS4?
For technical support, including SI86SO21BE-AS4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SO21BE-AS4 requirements.
6.How does Aetrix verify that SI86SO21BE-AS4 is sourced from the original manufacturer or authorized distributors?
All SI86SO21BE-AS4 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-AS4 meets industry standards.
7.What is the process for return or replacement of SI86SO21BE-AS4?
All SI86SO21BE-AS4 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SO21BE-AS4, 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-AS4 part is unused and in its original packaging.
Return procedure for SI86SO21BE-AS4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SO21BE-AS4 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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