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Skyworks Solutions Inc. SI86S621BE-AS4
- Part No.:
- SI86S621BE-AS4
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86S621BE-AS4.pdf
- Description:
- 6.0 KVRMS ISOLATOR, 2 UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:4,720
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Product details
Overview
SI86S621BE-AS4 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-AS4 datasheet, SI86S621BE-AS4 pinout, SI86S621BE-AS4 application, or SI86S621BE-AS4 equivalent, this page delivers verified specifications, validated pin functions, automotive-grade safety certifications (UL, VDE, CSA, CQC), and real-world timing behavior including 9 ns typical propagation delay and 100 kV/µs CMTI.
Technical Context
The SI86S621BE-AS4 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust operation without optical degradation. Its dual-channel architecture supports independent side-A and side-B power domains (VDD1/GND1 and VDD2/GND2) with separate UVLO and reset thresholds per side.
It integrates input deglitch filters (36 ns), precise fail-safe control during power loss, and internal 50 Ω output impedance matched to controlled-impedance PCB traces. Timing performance is specified at 2.5 V, 3.3 V, and 5.0 V supplies with guaranteed 6.7 ns minimum pulse width transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated ADC/DAC clocking without oversampling. |
| Propagation Delay | 9 ns typical (5–14 ns max) - enables tight timing closure in motor gate driver feedback loops and real-time BMS cell monitoring. |
| Isolation Voltage | 6000 VRMS (1 min) - meets reinforced insulation requirements for 1000 VDC bus systems in EV traction inverters and onboard chargers. |
| CMTI | 100 kV/µs minimum - suppresses false triggering in high-dV/dt environments such as IGBT/SiC switching nodes. |
| Supply Range | 2.25–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Fail-Safe Mode | Default low output - ensures safe shutdown state during VDD1 loss in battery disconnect circuits and precharge control logic. |
| Operating Temp | –40 to +125 °C - qualified for under-hood automotive applications including battery electric vehicle (BEV) power stages. |
Pinout & Package
SI86S621BE-AS4 uses an NB SOIC-8 package (3.9 mm creepage/clearance) with reinforced insulation barrier separating side-A (pins 1–4) and side-B (pins 5–8). Pin 3 (NC) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side-A power supply | Provides 2.25–5.5 V bias for channel inputs; requires 0.1 µF + 10 µF bypass capacitors placed adjacent to pin. |
| GND1 | Side-A ground reference | Return path for side-A logic; must be separated from GND2 by ≥3.9 mm PCB clearance per IEC 60747-17. |
| A1, A2 | Side-A digital inputs | CMOS/Schmitt-trigger inputs with 0.15×VDD hysteresis; accept 0–VDD logic levels; support 36 ns deglitch filtering. |
| NC | No-connect terminal | Pin 3 is internally unconnected; must be left floating-no routing or soldering permitted. |
| GND2 | Side-B ground reference | Return path for side-B outputs; forms isolation barrier with GND1; defines safety boundary for SELV circuits. |
| B1, B2 | Side-B digital outputs | 50 Ω nominal output impedance; drive 15 pF loads directly; default-low state asserted when VDD1 is unpowered. |
| VDD2 | Side-B power supply | Independent 2.25–5.5 V rail for output drivers; enables asymmetric supply configurations (e.g., 3.3 V MCU / 5 V actuator). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift; achieves stable 150 Mbps operation over –40 to +125 °C without calibration. |
| Selectably fail-safe output | Factory-configured default-low mode ensures BMS fault signals de-assert safely during primary-side power loss. |
| Integrated 36 ns input deglitch | Rejects ESD-induced transients and switching noise below 6.7 ns width-critical for clean gate driver enable signals. |
| AEC-Q100 Grade 0 qualification | Validated for 15-year automotive life at 125 °C junction temperature; includes PPAP documentation and IMDS/CAMDS support. |
| Reinforced insulation certification | UL 1577 (6000 VRMS), VDE 60747-17 (2121 Vpeak), CSA 62368-1 (600 VRMS)-enables single-component isolation in medical and EV systems. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitor ICs from MCU in 400–800 V battery packs. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting ADC conversion ready and cell balancing enable signals across high-voltage barrier. Use Value: 9 ns propagation delay enables sub-100 ns sampling synchronization; 100 kV/µs CMTI prevents false triggers during pack switching events. |
Use Scenario: Providing isolated gate drive enable/disable signals to SiC half-bridge modules in EV powertrains. IC Role / Device Role / Timing Role: Transmitting PWM dead-time control and fault feedback between MCU and isolated gate driver ICs. Use Value: Default-low fail-safe ensures gate drivers disable immediately upon MCU power loss; 150 Mbps supports fast fault reporting. |
| Onboard Charger (OBC) | Industrial Motor Drive |
|
Use Scenario: Isolating AC-DC PFC controller communication from DC-DC secondary-side regulation in bidirectional OBCs. IC Role / Device Role / Timing Role: Dual-channel link for isolated current sense data and synchronous rectifier control signals. Use Value: 6000 VRMS rating supports 1000 VAC input stage isolation; AEC-Q100 qualification ensures reliability in automotive thermal cycling. |
Use Scenario: Interfacing position encoder feedback and IGBT gate signals in servo drives operating at 690 VAC industrial mains. IC Role / Device Role / Timing Role: Transmitting quadrature encoder pulses and isolated gate enable commands across safety barrier. Use Value: 36 ns deglitch removes encoder commutation noise; 2.25–5.5 V supply range simplifies interface to both 3.3 V FPGAs and 5 V ASICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM220N1BRZ | 2-channel, 150 Mbps, 5000 VRMS, 3.0–5.5 V, default-high fail-safe, no deglitch filter | Lacks 36 ns input filtering and AEC-Q100 qualification; UL/VDE certified but not reinforced for >600 VRMS working voltage | Choose for cost-sensitive industrial designs where fail-safe polarity and automotive qualification are not required. |
| ISO7721FDWR | 2-channel, 100 Mbps, 5000 VRMS, 2.25–5.5 V, default-low fail-safe, no deglitch filter | Lower data rate limits SPI clock speed; lacks 100 kV/µs CMTI and AEC-Q100 Grade 0 validation | Use where 100 Mbps suffices and automotive qualification is unnecessary; lower power consumption at 3.3 V. |
Compared with ADUM220N1BRZ and ISO7721FDWR, SI86S621BE-AS4 uniquely combines AEC-Q100 Grade 0, 150 Mbps, 100 kV/µs CMTI, and factory-configured default-low fail-safe-making it the only option qualified for safety-critical BEV battery disconnect and traction inverter enable paths.
Availability
SI86S621BE-AS4 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply with automotive-grade lifecycle assurance and traceable sourcing.
Supply support for SI86S621BE-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for high-reliability applications.
The Si86S6xx family was engineered specifically for automotive and industrial isolation-delivering RF-based robustness, AEC-Q100 compliance, and reinforced safety certifications in compact NB SOIC-8 packaging.
FAQ
What is the fail-safe output configuration of SI86S621BE-AS4?
The SI86S621BE-AS4 is factory-configured for default-low fail-safe operation: when VDD1 is unpowered, B1 and B2 outputs are actively driven low while VDD2 remains powered. This behavior is confirmed in Table 2 of the datasheet and applies specifically to the "BE" ordering option. SI86S621BE-AS4 does not support field-selectable fail-safe polarity.
Does SI86S621BE-AS4 include input deglitch filtering?
Yes, SI86S621BE-AS4 includes a 36 ns input deglitch filter on both A1 and A2 channels, as explicitly stated in Section 3.4.1 and Figure 6 of the datasheet. This filter rejects noise pulses shorter than 36 ns, preventing false triggering in noisy motor drive or battery pack environments-distinct from the base Si86S621Bx variant which lacks this feature.
What safety certifications apply to SI86S621BE-AS4?
SI86S621BE-AS4 holds pending certifications per UL 1577 (6000 VRMS), VDE 60747-17 (2121 Vpeak reinforced), CSA 62368-1 (600 VRMS), and CQC GB4943.1. These are documented in Tables 9 and 10 of the datasheet. The NB SOIC-8 package provides 3.9 mm creepage/clearance, meeting IEC 60664-1 requirements for up to 300 VRMS mains voltage.
Can SI86S621BE-AS4 operate with different supply voltages on side-A and side-B?
Yes, SI86S621BE-AS4 supports independent VDD1 and VDD2 supplies ranging from 2.25 V to 5.5 V each. Electrical characteristics in Tables 6–8 confirm operation at mismatched rails (e.g., 3.3 V on side-A, 5.0 V on side-B). This enables direct interfacing between 3.3 V microcontrollers and 5 V gate drivers without external level shifters.
What is the maximum guaranteed data rate for SI86S621BE-AS4?
The SI86S621BE-AS4 guarantees 150 Mbps operation across its full temperature and supply range (–40 to +125 °C, 2.25–5.5 V), as specified in Table 6's "Data rate Si86SxxxB/Ex" row. This is distinct from the "F/H" variants (e.g., SI86S621F) rated for 10 Mbps. The "BE" suffix confirms high-speed B/Ex configuration.
SI86S621BE-AS4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si86S62x
- 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):
- 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-AS4 FAQ
1.How can I place an order for SI86S621BE-AS4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S621BE-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 SI86S621BE-AS4 reliable?
The price and inventory of SI86S621BE-AS4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S621BE-AS4 is usually 5 days.
3.What payment methods are accepted for SI86S621BE-AS4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S621BE-AS4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S621BE-AS4?
SI86S621BE-AS4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S621BE-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 SI86S621BE-AS4?
For technical support, including SI86S621BE-AS4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S621BE-AS4 requirements.
6.How does Aetrix verify that SI86S621BE-AS4 is sourced from the original manufacturer or authorized distributors?
All SI86S621BE-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 SI86S621BE-AS4 meets industry standards.
7.What is the process for return or replacement of SI86S621BE-AS4?
All SI86S621BE-AS4 units undergo pre-shipment inspection (PSI). If there is an issue with SI86S621BE-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 SI86S621BE-AS4 part is unused and in its original packaging.
Return procedure for SI86S621BE-AS4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S621BE-AS4 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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