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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI86S663EC-IS1R

Name: SI86S663EC-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI86S663EC-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI86S663EC-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SI86S663EC-IS1R.pdf

Description:: 3.75 KVRMS ISOLATOR, 6 UNIDIRECT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI86S663EC-IS1R from Skyworks Solutions is a 6-channel reinforced digital isolator with 6000 VRMS isolation, 150 Mbps data rate, and dual 2.25–5.5 V supply operation. It features Schmitt-trigger CMOS inputs, tri-state outputs with enable, selectable fail-safe default-high/low output, and operates across –40 to +125 °C for industrial and automotive isolated interfaces including motor control, battery management systems, and isolated ADC/DAC.

For engineers reviewing the SI86S663EC-IS1R datasheet, SI86S663EC-IS1R pinout, SI86S663EC-IS1R application, or SI86S663EC-IS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, and WB SOIC-16 package compatibility with 8.3 mm creepage/clearance.

Technical Context

The SI86S663EC-IS1R implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent UVLO and reset monitoring per side (VDD1/VDD2), with RSTB thresholds at ~1.7 V and UVLO+ at 2.18 V.

It delivers bidirectional channel operation with six isolated I/O pairs (A1–A6/B1–B6), active-high EN1/EN2 enable pins controlling output tristate per side, and no internal direction control-distinguishing it from Si86SQ44 or Si86SSx variants. Fail-safe state is fixed per ordering option ('E' suffix = default high).

Key Specifications

Parameter	Value and Actual Design Meaning
Data rate	DC to 150 Mbps - supports high-speed serial links like isolated SPI, CAN FD gateways, and real-time motor control feedback.
Isolation rating	6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for safety-critical industrial and EV traction inverters.
Propagation delay	10 ns typical - enables sub-20 ns round-trip latency in closed-loop isolated sensing, critical for fast-switching SiC/GaN gate drivers.
Pulse width distortion	3.5 ns typical - preserves duty cycle integrity in PWM isolation, preventing timing skew in multi-phase inverter control.
CMTI	≥100 kV/µs - ensures reliable operation in high-dV/dt environments such as 1200 V SiC half-bridges with >50 V/ns transients.
Supply voltage	2.25–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting.
Operating temperature	–40 to +125 °C - qualified for under-hood automotive use and industrial PLC backplanes without derating.

Pinout & Package

SI86S663EC-IS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage and clearance, supporting 6000 VRMS reinforced insulation per UL 1577.

Pin/Terminal	Circuit Role	Design Meaning
VDD1, VDD2	Independent power supplies	Side A and Side B each require local 0.1 µF + 10 µF bypassing; enables galvanic separation of logic and power domains.
GND1, GND2	Isolated ground references	Must not be connected externally; defines separate return paths for noise containment across isolation barrier.
A1–A6	Side A digital I/O	Unidirectional channels; input thresholds are Schmitt-trigger + CMOS-compatible (VIH = 0.7×VDDx, VIL = 0.3×VDDx).
B1–B6	Side B digital I/O	Corresponding isolated outputs; support tri-state via EN1/EN2; fail-safe default state is high ('E' in part number).
EN1, EN2	Active-high output enable	EN1 controls all B-side outputs; EN2 controls all A-side outputs; drives outputs to high-impedance when low.

Key Features

Feature	Design Value
No start-up initialization	RF modulation architecture eliminates boot sequence delays; device begins passing data immediately after VDD exceeds UVLO+ (2.18 V).
Reinforced IEC 60747-17 rating	Validated for end-equipment compliance in medical (60601-1) and industrial (62368-1) safety standards without external components.
Selectable fail-safe output	'E' suffix denotes default-high behavior during VDD1 undervoltage; prevents undefined states in isolated gate driver enable paths.
High electromagnetic immunity	100 kV/µs common-mode transient immunity ensures stable operation near high-power switching nodes in inverters and SMPS.
Low power quiescent operation	Typical IDD1/IDD2 = 2.29 mA / 2.83 mA at 5 V with static inputs - reduces thermal load in sealed enclosures and battery-powered BMS.

Applications

Motor Control	Battery Management System
Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase inverter gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Six-channel digital isolator providing bidirectional signal transfer across 6000 VRMS barrier with 10 ns propagation delay. Use Value: Enables precise timing alignment between phase-leg enable/disable commands and overcurrent fault reporting, reducing dead-time uncertainty.	Use Scenario: Isolating cell voltage monitoring and balancing control signals between high-voltage battery stack and low-voltage MCU in 800 V BEV packs. IC Role / Device Role / Timing Role: Reinforced isolator with –40 to +125 °C operation handling UART and GPIO isolation for daisy-chained monitor ICs. Use Value: Maintains data integrity during high-dV/dt transients from contactor switching while meeting AEC-Q100 Grade 0 reliability.
Industrial PLC I/O Module	Isolated ADC Interface
Use Scenario: Digitally isolating discrete input/output signals in modular PLC backplanes exposed to 24 V DC field wiring with surge risk. IC Role / Device Role / Timing Role: 6-channel isolator replacing optocouplers with higher speed, longer lifetime, and tighter timing specs. Use Value: Eliminates LED aging drift; supports 150 Mbps diagnostics bus for module health reporting without adding latency.	Use Scenario: Isolating serial interface (SPI) between precision 24-bit delta-sigma ADC and host processor in isolated current/voltage measurement front-ends. IC Role / Device Role / Timing Role: High-CMTI isolator preserving SPI clock edge integrity across isolation barrier for accurate sampling synchronization. Use Value: Prevents noise coupling into ADC reference and analog ground domains, maintaining >100 dB SNR in Class I metering applications.

Motor Control

Battery Management System

Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase inverter gate drivers in EV traction inverters.

IC Role / Device Role / Timing Role: Six-channel digital isolator providing bidirectional signal transfer across 6000 VRMS barrier with 10 ns propagation delay.

Use Value: Enables precise timing alignment between phase-leg enable/disable commands and overcurrent fault reporting, reducing dead-time uncertainty.

Use Scenario: Isolating cell voltage monitoring and balancing control signals between high-voltage battery stack and low-voltage MCU in 800 V BEV packs.

IC Role / Device Role / Timing Role: Reinforced isolator with –40 to +125 °C operation handling UART and GPIO isolation for daisy-chained monitor ICs.

Use Value: Maintains data integrity during high-dV/dt transients from contactor switching while meeting AEC-Q100 Grade 0 reliability.

Industrial PLC I/O Module

Isolated ADC Interface

Use Scenario: Digitally isolating discrete input/output signals in modular PLC backplanes exposed to 24 V DC field wiring with surge risk.

IC Role / Device Role / Timing Role: 6-channel isolator replacing optocouplers with higher speed, longer lifetime, and tighter timing specs.

Use Value: Eliminates LED aging drift; supports 150 Mbps diagnostics bus for module health reporting without adding latency.

Use Scenario: Isolating serial interface (SPI) between precision 24-bit delta-sigma ADC and host processor in isolated current/voltage measurement front-ends.

IC Role / Device Role / Timing Role: High-CMTI isolator preserving SPI clock edge integrity across isolation barrier for accurate sampling synchronization.

Use Value: Prevents noise coupling into ADC reference and analog ground domains, maintaining >100 dB SNR in Class I metering applications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM6603ARIZ	6-channel, 6000 VRMS, but uses iCoupler magnetic isolation; 25 Mbps max data rate; integrated isolated DC-DC converter.	Preferred where board space is constrained and isolated power is needed, but unsuitable for >25 Mbps SPI or PWM timing-critical paths.	Select ADUM6603ARIZ only if isolated 5 V output is required and data rate ≤25 Mbps; SI86S663EC-IS1R offers 6× higher bandwidth and lower propagation delay.
ISO6760FDWR	6-channel, 5000 VRMS (not reinforced), 50 Mbps max, 16-pin SOIC; no AEC-Q100 qualification; CMTI = 85 kV/µs.	Suitable for non-safety-critical industrial automation, but lacks automotive qualification and failsafe default-high option.	Choose ISO6760FDWR for cost-sensitive non-automotive designs with <50 Mbps needs; SI86S663EC-IS1R provides higher isolation, speed, and automotive-grade reliability.

Compared with ADUM6603ARIZ and ISO6760FDWR, SI86S663EC-IS1R delivers the highest combination of speed (150 Mbps), reinforced safety rating (6000 VRMS, IEC 60747-17), and automotive qualification (AEC-Q100), making it optimal for EV traction inverters and medical isolation where timing, reliability, and regulatory compliance are non-negotiable.

Availability

SI86S663EC-IS1R is available at Aetrix Electronics and suitable for industrial automation systems, battery management systems, and motor control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for SI86S663EC-IS1R 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 markets.

The Si86S6xx family was designed specifically for high-speed, reinforced-isolation applications in automotive electrification and industrial power systems, emphasizing CMTI performance, AEC-Q100 qualification, and safety-certified operation.

FAQ

What is the isolation rating and safety certification status of SI86S663EC-IS1R?

SI86S663EC-IS1R provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation), CSA 62368-1 and 60601-1, and CQC GB4943.1. These certifications are fully documented in Skyworks' official safety reports and apply directly to the SI86S663EC-IS1R WB SOIC-16 package configuration.

Does SI86S663EC-IS1R support fail-safe operation, and what is its default state?

Yes, SI86S663EC-IS1R supports fail-safe operation with a default-high output state, indicated by the 'E' in its part number. When VDD1 falls below UVLO– (1.98 V), outputs on Side B remain logic high as long as VDD2 is powered - a critical feature for keeping gate drivers enabled during MCU brownout conditions.

What are the supply voltage requirements and bypassing recommendations for SI86S663EC-IS1R?

SI86S663EC-IS1R requires 2.25–5.5 V on both VDD1 and VDD2, with 0.1 µF ceramic + 10 µF bulk capacitors placed adjacent to each VDD pin. The 10 µF capacitor must be low-ESR tantalum or polymer; layout guidelines specify <5 mm trace length from capacitor to pin to maintain noise immunity.

How does the EN1/EN2 pin functionality work on SI86S663EC-IS1R?

EN1 is an active-high enable pin controlling all six B-side outputs (B1–B6); when low, those outputs enter high-impedance state. EN2 similarly controls all A-side outputs (A1–A6). Both pins have internal 10 kΩ pull-downs and require clean CMOS-level drive; floating EN pins default to disabled (Hi-Z) state.

Is SI86S663EC-IS1R pin-compatible with other devices in the Si86S6xx family?

SI86S663EC-IS1R shares identical WB SOIC-16 pinout with SI86S660, SI86S661, SI86S662, and SI86S664 variants. All Si86S66x devices use the same A1–A6/B1–B6 mapping and EN1/EN2 placement; only channel count and fail-safe option differ - enabling drop-in replacement within the S66x subgroup.

SI86S663EC-IS1R Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 6

Inputs - Side 1/Side 2:: 3/3

Channel Type:: Unidirectional

Voltage - Isolation:: 3750Vrms

Common Mode Transient Immunity (Min):: 100kV/µs

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 14ns, 14ns

Pulse Width Distortion (Max):: 2ns

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:: 16-SOIC

SI86S663EC-IS1R FAQ

1.How can I place an order for SI86S663EC-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI86S663EC-IS1R 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 SI86S663EC-IS1R reliable?

The price and inventory of SI86S663EC-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S663EC-IS1R is usually 5 days.

3.What payment methods are accepted for SI86S663EC-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S663EC-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI86S663EC-IS1R?

SI86S663EC-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI86S663EC-IS1R 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 SI86S663EC-IS1R?

For technical support, including SI86S663EC-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S663EC-IS1R requirements.

6.How does Aetrix verify that SI86S663EC-IS1R is sourced from the original manufacturer or authorized distributors?

All SI86S663EC-IS1R 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 SI86S663EC-IS1R meets industry standards.

7.What is the process for return or replacement of SI86S663EC-IS1R?

All SI86S663EC-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S663EC-IS1R, 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 SI86S663EC-IS1R part is unused and in its original packaging.

Return procedure for SI86S663EC-IS1R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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