My Inquiry
My Account
Skyworks Solutions Inc. SI86SO21EE-IS4
- Part No.:
- SI86SO21EE-IS4
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SO21EE-IS4.pdf
- Description:
- 6.0 KVRMS INVERTING OUTPUT ISOLA
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI86SO21EE-IS4 from Skyworks Solutions is a dual-channel, inverting-output 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 default-low output, and operates across 2.25–5.5 V supply rails. Used in battery management systems and traction inverters where high CMTI and precise timing are critical.
For engineers reviewing the SI86SO21EE-IS4 datasheet, SI86SO21EE-IS4 pinout, SI86SO21EE-IS4 application, or SI86SO21EE-IS4 equivalent, this page delivers verified specifications, validated pin functions, automotive-grade safety certifications (UL, VDE, CSA), and real-world design context for isolated signal transmission in high-noise EV power electronics.
Technical Context
The SI86SO21EE-IS4 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture delivers 10 ns typical propagation delay and 3.5 ns pulse width distortion at 150 Mbps, with independent UVLO and reset circuitry per side (VDD1/VDD2).
It supports fail-safe operation via ordering option: SI86SO21EE-IS4 defaults to low output during input-side power loss while maintaining valid output on powered side B. Input deglitch filtering (36 ns) and 100 kV/µs CMTI ensure reliability in motor control and onboard charger transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - enables high-speed CAN FD, SPI, or PWM feedback in real-time power conversion loops |
| Propagation delay | 5–14 ns - ensures sub-20 ns channel-to-channel timing alignment for synchronous gate driving |
| Isolation rating | 6000 VRMS - meets reinforced insulation requirements for 1000 V DC battery systems per UL 1577 |
| CMTI | 100 kV/µs - sustains signal integrity during fast dv/dt switching events in SiC/GaN inverters |
| Supply voltage | 2.25–5.5 V - interoperable with 3.3 V microcontrollers and 5 V analog front-ends without level shifters |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 1 |
| Fail-safe mode | Default low - guarantees safe shutdown state for isolated enable/disable signals in BMS fault handling |
Pinout & Package
SI86SO21EE-IS4 uses an SSO-8 (wide-body SOIC-8) package with 8.0 mm creepage/clearance, optimized for 6000 VRMS reinforced insulation. Pin 1 is VDD1; pin 8 is VDD2; isolation barrier separates Side A (pins 1–4) and Side B (pins 5–8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A power supply | Supplies isolated input-side logic; requires 0.1 µF + 10 µF bypass capacitors |
| GND1 | Side A ground | Reference for A1/A2 inputs; must be separated from GND2 by ≥8 mm PCB clearance |
| A1, A2 | Side A digital inputs | Inverting channels: low input → high output; Schmitt-trigger inputs reject <36 ns noise pulses |
| GND2 | Side B ground | Reference for B1/B2 outputs; forms isolated return path for high-side gate drivers |
| B1, B2 | Side B digital outputs | Inverting outputs: driven low when corresponding A-input is high; 50 Ω nominal impedance |
| VDD2 | Side B power supply | Supplies isolated output-side logic; independent of VDD1 for dual-supply system partitioning |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift; enables 150 Mbps operation with no start-up delay |
| Selectably inverting output | SI86SO21EE-IS4 provides fixed inverting logic per channel-simplifies interface to IGBT/SiC gate drivers requiring active-low enable |
| Fail-safe default-low | Guarantees B1/B2 = low during VDD1 undervoltage-critical for safe disable of power stages in BMS fault conditions |
| 36 ns input deglitch filter | Rejects EMI-induced glitches from motor phase currents or DC-link ripple without adding external RC networks |
| AEC-Q100 Grade 1 | Validated for automotive use up to +125 °C ambient-supports deployment in OBC, traction inverter, and battery pack controllers |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADCs and pack contactor control signals in 800 V EV battery packs. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting sampled voltage data and fault-clear commands across 6000 VRMS barrier with <14 ns skew. Use Value: Enables reinforced insulation compliance while maintaining 150 Mbps throughput for real-time cell balancing decisions. |
Use Scenario: Driving high-side and low-side gate drivers in 3-phase SiC inverter modules with independent isolated supplies. IC Role / Device Role / Timing Role: Inverting isolator delivering complementary PWM signals with matched 10 ns propagation delay to minimize shoot-through risk. Use Value: 100 kV/µs CMTI prevents false triggering during 100 V/ns bus transients in fast-switching inverters. |
| Onboard Charger (OBC) | Industrial Motor Drive |
|
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC converter in bidirectional OBCs. IC Role / Device Role / Timing Role: Dual-channel isolator carrying interleaved PWM and current-sense alerts across galvanic barrier with fail-safe low default. Use Value: Default-low behavior ensures LLC controller disables safely during PFC controller brownout-preventing uncontrolled DC-link rise. |
Use Scenario: Transmitting encoder position data and torque command signals in servo drives operating in noisy factory environments. IC Role / Device Role / Timing Role: Inverting isolator interfacing FPGA encoder inputs to isolated microcontroller with 36 ns noise filtering. Use Value: Rejects 50/60 Hz harmonics and VFD-induced transients without software debouncing or external filters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM121N1BRZ-RL7 | Single-channel, non-inverting, 150 Mbps, 3750 VRMS isolation, SOIC-8 | Lacks reinforced 6000 VRMS rating and AEC-Q100 qualification; suitable for industrial but not automotive traction systems | Choose for cost-sensitive industrial PLC I/O where 3.75 kVRMS suffices and inverting logic is not required |
| ISO7721DWR | Dual-channel, non-inverting, 100 Mbps, 5000 VRMS, SOIC-16 wide-body | Lower data rate and isolation voltage; no fail-safe default-low option; TI's ISO7721DWR uses capacitive coupling | Prefer when board space allows SOIC-16 and system timing budget permits 100 Mbps with 25 ns propagation delay |
Compared with ADUM121N1BRZ-RL7 and ISO7721DWR, SI86SO21EE-IS4 uniquely combines dual-channel inverting logic, 6000 VRMS reinforced isolation, AEC-Q100 Grade 1, and fail-safe default-low-making it the only qualified solution for functional safety-critical automotive battery and inverter control.
Availability
SI86SO21EE-IS4 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 SI86SO21EE-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 high-performance analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.
The Si86S61x/S62x/SOx family was designed specifically for automotive and industrial isolation-delivering RF-based reliability, AEC-Q100 qualification, and reinforced safety certification in compact SSO-8 packages.
FAQ
What is the isolation voltage rating of SI86SO21EE-IS4 and which standards does it meet?
SI86SO21EE-IS4 is rated for 6000 VRMS isolation per UL 1577 and certified for reinforced insulation per VDE 60747-17, CSA 62368-1, and GB4943.1. Its SSO-8 package provides 8.0 mm creepage and clearance, supporting 1500 VRMS working voltage in automotive battery systems. This rating is validated for 1-minute withstand and time-dependent dielectric breakdown testing.
Does SI86SO21EE-IS4 support fail-safe operation, and how is it configured?
Yes, SI86SO21EE-IS4 is manufactured with fixed fail-safe default-low output-meaning B1 and B2 go low when VDD1 is unpowered but VDD2 remains active. This behavior is defined by the part number suffix "EE" and cannot be changed in-circuit. It ensures safe shutdown of downstream power stages during input-side supply faults in BMS and OBC applications.
What is the propagation delay and channel-to-channel skew of SI86SO21EE-IS4?
SI86SO21EE-IS4 has a typical propagation delay of 10 ns (min 5 ns, max 14 ns at 2.5–5.5 V) and channel-to-channel skew of ≤3 ns. These values are guaranteed across –40 to +125 °C and enable precise timing alignment for dual PWM outputs in SiC gate driver interfaces without external deskew compensation.
Can SI86SO21EE-IS4 operate with different supply voltages on each side?
Yes, SI86SO21EE-IS4 supports independent 2.25–5.5 V supplies on VDD1 (Side A) and VDD2 (Side B). This allows interfacing 3.3 V microcontrollers to 5 V gate drivers or isolated ADCs without level-shifting components. Each side has its own UVLO and reset circuitry, ensuring robust operation during asymmetric power sequencing.
Is SI86SO21EE-IS4 qualified for automotive applications, and what does AEC-Q100 Grade 1 mean?
Yes, SI86SO21EE-IS4 is AEC-Q100 Grade 1 qualified, meaning it is tested and certified for operation from –40 to +125 °C ambient temperature-covering under-hood and battery-pack environments in EVs. This includes stress testing for thermal cycling, humidity, and mechanical shock, ensuring long-term reliability in automotive power electronics.
SI86SO21EE-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
SI86SO21EE-IS4 FAQ
1.How can I place an order for SI86SO21EE-IS4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SO21EE-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 SI86SO21EE-IS4 reliable?
The price and inventory of SI86SO21EE-IS4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SO21EE-IS4 is usually 5 days.
3.What payment methods are accepted for SI86SO21EE-IS4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SO21EE-IS4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SO21EE-IS4?
SI86SO21EE-IS4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SO21EE-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 SI86SO21EE-IS4?
For technical support, including SI86SO21EE-IS4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SO21EE-IS4 requirements.
6.How does Aetrix verify that SI86SO21EE-IS4 is sourced from the original manufacturer or authorized distributors?
All SI86SO21EE-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 SI86SO21EE-IS4 meets industry standards.
7.What is the process for return or replacement of SI86SO21EE-IS4?
All SI86SO21EE-IS4 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SO21EE-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 SI86SO21EE-IS4 part is unused and in its original packaging.
Return procedure for SI86SO21EE-IS4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SO21EE-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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
