My Inquiry
My Account
Skyworks Solutions Inc. SI86S621HC-AS
- Part No.:
- SI86S621HC-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S621HC-AS.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 2 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,422
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI86S621HC-AS from Skyworks Solutions is a dual-channel, high-speed digital isolator with reinforced 6000 VRMS isolation, AEC-Q100 qualification, and selectable fail-safe output (default low). It operates from 2.25–5.5 V on both sides, delivers 150 Mbps data rate, 10 ns typical propagation delay, and supports industrial motor control and automotive battery management systems.
For engineers reviewing the SI86S621HC-AS datasheet, SI86S621HC-AS pinout, SI86S621HC-AS application, or SI86S621HC-AS equivalent, this page provides verified specifications, package mapping to NB SOIC-8, confirmed pin functions, automotive-grade safety certifications (UL, VDE, CSA), and real-world timing behavior under undervoltage and power-loss conditions.
Technical Context
The SI86S621HC-AS uses RF-based on/off keying across a semiconductor isolation barrier-eliminating start-up initialization and enabling robust noise immunity. Its dual-channel architecture features independent side-A and side-B UVLO and reset circuits, with RSTB thresholds at ~1.7 V and UVLO hysteresis of 105–160 mV.
It implements Schmitt-trigger + CMOS threshold inputs for high noise rejection, includes 36 ns input deglitch filtering (confirmed for Si86S62x family), and supports fail-safe operation where outputs default low during VDD1 loss while VDD2 remains active-per ordering option HC (default low).
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 bottlenecks. |
| Propagation delay | 5–14 ns (typ. 10 ns) - enables tight timing budgets in motor gate driver feedback loops and real-time power converter control. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for 600 VAC mains-connected systems. |
| Supply voltage range | 2.25–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems without level-shifting. |
| CMTI | 100 kV/µs minimum - ensures reliable operation in noisy inverter environments with fast-switching SiC/GaN power stages. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive use and industrial PLC backplanes without derating. |
| Fail-safe mode | Default low (HC variant) - forces safe logic-low state on isolated outputs during primary-side power loss, critical for fault-tolerant BMS shutdown. |
Pinout & Package
SI86S621HC-AS is housed in an NB SOIC-8 package (wide-body, 8.0 mm creepage/clearance), optimized for 6000 VRMS reinforced insulation. Pin 1 = VDD1, Pin 2 = A1, Pin 3 = A2, Pin 4 = GND1, Pin 5 = GND2, Pin 6 = B1, Pin 7 = B2, Pin 8 = VDD2. Pin 4 and Pin 5 are isolated grounds separated by the internal barrier.
| 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 near the pin. |
| A1, A2 | Side A digital I/O | Dual-channel inputs accepting 2.25–5.5 V logic; include Schmitt-trigger + CMOS thresholds for noise immunity. |
| GND1 | Side A ground | Reference return for VDD1 and A1/A2; galvanically isolated from GND2 by the internal barrier. |
| GND2 | Side B ground | Reference return for VDD2 and B1/B2; physically and electrically separated from GND1 to maintain isolation integrity. |
| B1, B2 | Side B digital I/O | Dual-channel outputs with ~50 Ω nominal impedance; support controlled-impedance PCB routing for signal integrity. |
| VDD2 | Side B power supply | Supplies isolated output-side logic; independent of VDD1, enabling asymmetric supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and start-up delays-enables immediate data transmission after power-on without configuration. |
| Selectably fail-safe output (HC) | Guarantees logic-low output when VDD1 is unpowered but VDD2 is active-prevents undefined states in safety-critical BMS or inverter enable lines. |
| 36 ns input deglitch filter | Rejects sub-36 ns noise pulses (e.g., EFT bursts, switching transients) while preserving valid signal edges for clean isolated communication. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications up to +125 °C ambient, with 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 traction systems. |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverters for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting PWM enable/disable and fault signals across high dv/dt barriers with <14 ns propagation delay. Use Value: Prevents ground-loop noise from corrupting gate drive timing, enabling stable SiC MOSFET switching at >100 kHz with 100 kV/µs CMTI margin. |
Use Scenario: Isolating cell voltage monitoring and pack contactor control in high-voltage EV battery packs (400–800 V). IC Role / Device Role / Timing Role: Providing reinforced 6000 VRMS isolation between MCU domain (side A) and high-side sensing/control domain (side B). Use Value: Enables functional safety compliance (ISO 26262 ASIL-B) via certified reinforced insulation and fail-safe default-low output during MCU brownout. |
| Isolated Switch-Mode Power Supply | Medical Isolated ADC Interface |
|
Use Scenario: Feedback signal isolation in 1–3 kW AC/DC PSUs for telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Transmitting optocoupler-replacement error amplifier output and synchronous rectifier timing across primary-secondary barrier. Use Value: Delivers 150 Mbps bandwidth and 10 ns propagation delay-supporting adaptive dead-time control and dynamic load transient response. |
Use Scenario: Isolating precision 24-bit sigma-delta ADC outputs in patient-connected diagnostic equipment (ECG, EEG). IC Role / Device Role / Timing Role: Dual-channel isolator separating ADC digital interface (SPI clock/data) from host processor while maintaining signal integrity. Use Value: Meets 2 MOPP requirement per IEC 60601-1 via 6000 VRMS rating and 8.0 mm creepage-eliminating need for external isolation components. |
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, SOIC-8 (narrow body), no AEC-Q100 qualification. | Lacks reinforced 6000 VRMS rating and automotive qualification-suitable only for non-safety-critical industrial use. | Choose when cost sensitivity outweighs safety certification needs and dual-channel functionality is not required. |
| ISO7721FDWR | Dual-channel, 100 Mbps, 5000 VRMS, SOIC-8 (wide body), AEC-Q100 Grade 1, but no selectable fail-safe mode. | Lower data rate and fixed default output-limits use in high-speed SPI or fast-fault-response systems requiring configurable fail-state. | Prefer when system-level reset coordination handles power-loss states, and 100 Mbps suffices for control loop bandwidth. |
Compared with ADUM121N0BRZ-RL7 and ISO7721FDWR, SI86S621HC-AS uniquely combines dual-channel 150 Mbps operation, 6000 VRMS reinforced isolation, AEC-Q100 qualification, and factory-configured default-low fail-safe behavior-making it optimal for automotive BMS and high-reliability industrial inverters where timing, safety, and deterministic power-loss response are co-constrained.
Availability
SI86S621HC-AS is available at Aetrix Electronics and suitable for automotive battery management systems, industrial motor drives, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SI86S621HC-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 high-performance analog semiconductors, specializing in RF, timing, and isolation solutions for communications, automotive, and industrial markets.
The Si86S6xx family was designed specifically for safety-critical isolation in automotive electrification and industrial automation-emphasizing AEC-Q100 compliance, reinforced insulation, and deterministic fail-safe behavior under supply fault conditions.
FAQ
What is the isolation voltage rating of SI86S621HC-AS and which standards does it meet?
The SI86S621HC-AS has a 6000 VRMS isolation rating per UL 1577 (1 minute), reinforced insulation per VDE 60747-17 (2121 Vpeak), and certification to CSA 62368-1 and CQC GB4943.1. These ratings are validated for the NB SOIC-8 package and apply directly to the SI86S621HC-AS device, enabling its use in high-voltage industrial and automotive systems requiring two means of protection.
Does SI86S621HC-AS require external initialization or configuration at power-up?
No, SI86S621HC-AS requires no start-up initialization. It begins transmitting valid data within 300 µs of VDD1/VDD2 reaching UVLO+ (2.18 V typical), using an RF on/off keying architecture that eliminates boot sequences. The SI86S621HC-AS enters normal operation immediately after power stabilization, with outputs following inputs once UVLO exits.
How does the fail-safe mode work in SI86S621HC-AS, and what is its default state?
The SI86S621HC-AS is ordered with "HC" suffix indicating default-low fail-safe mode. When VDD1 is unpowered but VDD2 remains active, outputs B1 and B2 are actively driven low. This behavior is hard-coded in silicon and confirmed in Table 2 of the datasheet-ensuring predictable shutdown in battery management or motor control systems during MCU power loss.
What is the maximum data rate supported by SI86S621HC-AS, and under what conditions is it guaranteed?
The SI86S621HC-AS supports up to 150 Mbps data rate across both channels simultaneously, guaranteed over the full operating temperature range (–40 to +125 °C) and supply range (2.25–5.5 V). This performance is specified in Tables 6–8 of the datasheet for VDD = 2.5 V, 3.3 V, and 5.0 V, with pulse width distortion ≤4.5 ns ensuring signal fidelity.
Can SI86S621HC-AS be used in medical equipment requiring patient isolation?
Yes, SI86S621HC-AS is certified to CSA 60601-1 for up to 250 VRMS working voltage and 2 MOPP (Means of Patient Protection), with 8.0 mm creepage/clearance in the NB SOIC-8 package. Its reinforced insulation and 6000 VRMS rating make it suitable for isolating ADC interfaces and sensor front-ends in diagnostic devices compliant with IEC 60601-1.
SI86S621HC-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):
- 150kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 41.5ns, 41.5ns
- 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
SI86S621HC-AS FAQ
1.How can I place an order for SI86S621HC-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S621HC-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 SI86S621HC-AS reliable?
The price and inventory of SI86S621HC-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S621HC-AS is usually 5 days.
3.What payment methods are accepted for SI86S621HC-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S621HC-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S621HC-AS?
SI86S621HC-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S621HC-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 SI86S621HC-AS?
For technical support, including SI86S621HC-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S621HC-AS requirements.
6.How does Aetrix verify that SI86S621HC-AS is sourced from the original manufacturer or authorized distributors?
All SI86S621HC-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 SI86S621HC-AS meets industry standards.
7.What is the process for return or replacement of SI86S621HC-AS?
All SI86S621HC-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI86S621HC-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 SI86S621HC-AS part is unused and in its original packaging.
Return procedure for SI86S621HC-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S621HC-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…
