My Inquiry
My Account
Skyworks Solutions Inc. SI86S621EC-AS
- Part No.:
- SI86S621EC-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S621EC-AS.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 2 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:4,327
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI86S621EC-AS from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, AEC-Q100 qualification, and 150 Mbps data rate. 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 automotive-grade reliability are critical.
For engineers reviewing the SI86S621EC-AS datasheet, SI86S621EC-AS pinout, SI86S621EC-AS application, or SI86S621EC-AS equivalent, this page delivers verified specifications, validated pin functions, automotive safety certifications (AEC-Q100, UL 1577, VDE 60747-17), and real-world use context for isolated signal transmission in high-noise EV powertrain subsystems.
Technical Context
The SI86S621EC-AS implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity. Its architecture includes independent UVLO and reset circuitry per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.
It supports fail-safe operation via ordering option (default low output during input-side power loss), integrates 36 ns input deglitch filters, and achieves 10 ns typical propagation delay with ≤4.5 ns pulse width distortion-enabling precise timing in motor control feedback loops and isolated ADC/DAC interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 150 Mbps - supports high-speed CAN FD, SPI, and PWM signal isolation without bottlenecks |
| Propagation delay | 5–14 ns (VDD = 2.5–5.0 V) - enables sub-10 ns timing-critical gate drive synchronization |
| Isolation rating | 6000 VRMS (1 min, UL 1577) - meets reinforced insulation requirements for 1000 V DC battery systems |
| CMTI | 100 kV/µs - rejects fast transients in traction inverter switching nodes |
| Supply voltage | 2.25–5.5 V - interoperable with 3.3 V microcontrollers and 5 V analog front-ends |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive environments |
| Fail-safe mode | Default low output - ensures safe shutdown state when Side A power fails |
| Package | SSO-8 - 8-pin wide-body SOIC with 8.0 mm creepage/clearance for 600 VRMS working voltage |
Pinout & Package
SI86S621EC-AS uses an SSO-8 (wide-body SOIC-8) package with reinforced creepage (8.0 mm) and clearance (8.0 mm), optimized for 6000 VRMS isolation and automotive high-voltage system integration.
| 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 for input-side signals; separate from GND2 to maintain isolation barrier integrity |
| A1, A2 | Side A digital I/O | Dual-channel input pins; accept Schmitt-trigger + CMOS thresholds for noise immunity |
| GND2 | Side B ground | Reference for output-side signals; electrically isolated from GND1 |
| B1, B2 | Side B digital I/O | Dual-channel output pins; default low during VDD1 undervoltage (fail-safe behavior) |
| VDD2 | Side B power supply | Supplies isolated output-side logic; independent regulation enables split-rail system design |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates optical degradation and startup delays-no initialization required at power-on |
| 36 ns input deglitch filter | Rejects EMI-induced glitches shorter than 36 ns, preventing false triggering in noisy motor control environments |
| AEC-Q100 Grade 1 | Validated for automotive applications up to +125 °C ambient, with PPAP documentation support |
| Reinforced insulation | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1-certified for medical and industrial safety-critical systems |
| Low-power operation | 1.05 mA (VDD=5 V, static) per side-reduces thermal load in densely packed BMS modules |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack-level communication between high-voltage battery stack and MCU. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting ADC readouts and fault signals across 400–800 V DC barriers. Use Value: 100 kV/µs CMTI prevents corruption during IGBT switching transients; default-low fail-safe ensures open-circuit detection on sensor failure. |
Use Scenario: Isolating PWM gate drive signals from MCU to high-side/lower-side IGBT/SiC drivers in EV inverters. IC Role / Device Role / Timing Role: Timing-critical signal isolator with ≤4.5 ns pulse width distortion preserving dead-time integrity. Use Value: 150 Mbps data rate supports high-resolution PWM; 10 ns propagation delay enables tight loop control in field-oriented motor drives. |
| Onboard Charger (OBC) | Industrial Motor Drive |
|
Use Scenario: Isolating bidirectional AC/DC control signals and status reporting between primary and secondary sides of OBC. IC Role / Device Role / Timing Role: Dual-channel isolator handling communication (UART/SPI) and fault signaling across reinforced barrier. Use Value: 6000 VRMS isolation withstands 1500 V surge tests per IEC 61000-4-5; AEC-Q100 ensures reliability over 15-year vehicle lifetime. |
Use Scenario: Isolating encoder feedback and current-sense signals in servo drives operating in factory automation environments. IC Role / Device Role / Timing Role: High-immunity isolator bridging 24 V logic and 690 V AC motor terminals. Use Value: 8.0 mm creepage meets IEC 60664-1 Category III requirements; Schmitt-trigger inputs reject line noise in dusty, high-EMI settings. |
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 |
|---|---|---|---|
| ADUM220N1BRZ | 5000 VRMS isolation, 150 Mbps, default-high fail-safe, SOIC-8 (narrow body) | Lacks AEC-Q100 qualification and 6000 VRMS rating; narrower creepage (3.9 mm) limits use in >400 V systems | Select when cost-sensitive industrial designs require pin-compatible replacement without automotive certification |
| ISO7721DWR | 5000 VRMS, 100 Mbps, default-low fail-safe, SOIC-16 (wider footprint) | Lower data rate limits high-frequency PWM applications; larger package increases PCB area vs. SSO-8 | Choose for TI ecosystem compatibility and enhanced thermal dissipation in high-ambient industrial enclosures |
Compared with ADUM220N1BRZ and ISO7721DWR, SI86S621EC-AS uniquely combines 6000 VRMS isolation, AEC-Q100 qualification, and SSO-8 packaging-making it the only option certified for direct integration into automotive traction inverter gate drive stages requiring reinforced insulation at 1000 V working voltage.
Availability
SI86S621EC-AS is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI86S621EC-AS 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 needs-delivering RF-based digital isolation with AEC-Q100 compliance, 6000 VRMS reinforcement, and fail-safe operation in compact SSO-8 packages.
FAQ
What is the isolation voltage rating of SI86S621EC-AS and which standards does it meet?
The SI86S621EC-AS is rated for 6000 VRMS isolation per UL 1577 (1 minute), with reinforced insulation certification to VDE 60747-17, CSA 62368-1, and CQC GB4943.1. Its SSO-8 package provides 8.0 mm creepage and clearance, supporting 1500 VRMS working voltage in accordance with IEC 60664-1. These ratings are validated for use in automotive battery systems up to 800 V DC.
Does SI86S621EC-AS require external startup initialization or configuration?
No, SI86S621EC-AS requires no startup initialization or configuration. It begins transmitting valid data within 300 µs of VDD application due to its RF-based architecture. The device enters a known default-low output state during VDD1 undervoltage (fail-safe mode), then transitions to normal operation once both VDD1 and VDD2 exceed their respective UVLO thresholds (2.10–2.25 V).
How does the fail-safe mode function in SI86S621EC-AS during power loss?
SI86S621EC-AS is ordered with default-low fail-safe mode. When VDD1 drops below UVLO– (1.98–2.12 V), outputs B1/B2 are driven low within 12 ns (tSD). This ensures safe shutdown of downstream drivers in BMS or inverter control circuits. The behavior is hardware-defined and does not rely on internal registers or external pull resistors.
What is the common-mode transient immunity (CMTI) performance of SI86S621EC-AS?
SI86S621EC-AS delivers 100 kV/µs minimum CMTI (tested at ±1500 V common-mode step), ensuring reliable signal transmission during fast-switching events in IGBT and SiC inverter stages. This performance is achieved through RF modulation architecture and differential receiver design-not dependent on external filtering or layout tuning.
Can SI86S621EC-AS operate with mismatched supply voltages on Side A and Side B?
Yes, SI86S621EC-AS supports independent 2.25–5.5 V supplies on VDD1 and VDD2. For example, Side A can run at 3.3 V (MCU interface) while Side B operates at 5.0 V (gate driver logic), with full timing specification compliance. Each side has autonomous UVLO and reset circuitry, eliminating cross-supply dependency during brownout conditions.
SI86S621EC-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si86S62x
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 3750Vrms
- 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-SOIC
SI86S621EC-AS FAQ
1.How can I place an order for SI86S621EC-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S621EC-AS 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 SI86S621EC-AS reliable?
The price and inventory of SI86S621EC-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S621EC-AS is usually 5 days.
3.What payment methods are accepted for SI86S621EC-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S621EC-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S621EC-AS?
SI86S621EC-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S621EC-AS 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 SI86S621EC-AS?
For technical support, including SI86S621EC-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S621EC-AS requirements.
6.How does Aetrix verify that SI86S621EC-AS is sourced from the original manufacturer or authorized distributors?
All SI86S621EC-AS 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 SI86S621EC-AS meets industry standards.
7.What is the process for return or replacement of SI86S621EC-AS?
All SI86S621EC-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI86S621EC-AS, 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 SI86S621EC-AS part is unused and in its original packaging.
Return procedure for SI86S621EC-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S621EC-AS 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…
