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Skyworks Solutions Inc. SI8663EC-B-IS1R
- Part No.:
- SI8663EC-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8663EC-B-IS1R.pdf
- Description:
- DGTL ISO 3750VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,397
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Product details
Overview
SI8663EC-B-IS1R from Skyworks is a six-channel digital isolator with 3 input channels on VDD1 side and 3 output channels on VDD2 side, supporting up to 150 Mbps data rate, <10 ns propagation delay, and 3.75 kVRMS isolation rating in narrow-body SOIC-16 package. It operates from 2.5–5.5 V supply, features Schmitt-trigger inputs, selectable high-default fail-safe mode, and targets isolated communication in motor control and industrial power systems.
For engineers reviewing the SI8663EC-B-IS1R datasheet, SI8663EC-B-IS1R pinout, SI8663EC-B-IS1R application, or SI8663EC-B-IS1R equivalent, key selection criteria include channel configuration (3/3), fail-safe default-high behavior, 3.75 kVRMS isolation, narrow-body SOIC-16 footprint compatibility, and ultra-low power consumption at 100 Mbps (16.4 mA per side).
Technical Context
The SI8663EC-B-IS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its architecture delivers precise timing with ≤0.5 ns channel-channel skew and ≤2 ns propagation delay skew across temperature (–40 to 125 °C).
Each side includes independent undervoltage lockout (UVLO+ = 2.24 V typ, UVLO– = 2.16 V typ) and Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ) for >0.4 V hysteresis. The device supports fail-safe operation where powered outputs default to logic high when the input side is unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels (VDD1/VDD2) | 3 / 3 - Enables bidirectional signal isolation with balanced I/O distribution for gate driver feedback or ADC/DAC interface. |
| Max Data Rate | 150 Mbps - Supports high-speed serial interfaces such as isolated SPI, RS-485 transceiver control, or PWM synchronization. |
| Propagation Delay | 8.0 ns typ - Ensures sub-10 ns timing integrity critical for real-time motor control loop closure and fast fault response. |
| Isolation Rating | 3.75 kVRMS - Meets reinforced insulation requirements per IEC 62368-1 and UL 1577 for industrial power supply safety barriers. |
| Supply Voltage Range | 2.5–5.5 V - Allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Fail-Safe Default | High - Guarantees known safe state (e.g., disable gate drive) during input-side power loss in inverter applications. |
| CMTI | 50 kV/µs min - Rejects high dv/dt noise from SiC/GaN switching nodes without data corruption in power electronics. |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package with 1.27 mm pitch, RoHS-compliant, JEDEC-standard reflow profile (260 °C peak), 8 mm creepage/clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to 3 input channels and internal transmitter; requires 0.1 µF bypass capacitor to GND1. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier; forms primary-side ground plane. |
| INA1–INA3 | Input signals (side A) | Accept 2.0–5.5 V logic; Schmitt-triggered for >0.4 V noise margin; no external pull-up required for default-high variant. |
| VDD2 | Output-side power supply | Supplies power to 3 output drivers and receiver; independent of VDD1; enables galvanic separation of domains. |
| GND2 | Output-side ground reference | Return path for VDD2; electrically isolated from GND1; defines secondary-side ground for isolated loads. |
| OUTA1–OUTA3 | Isolated output signals (side B) | 50 Ω nominal output impedance; drives 15 pF loads directly; defaults high during VDD1 undervoltage condition. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and CTR drift; ensures stable 60-year lifetime at rated working voltage without performance degradation. |
| Selectably high-default fail-safe | Guarantees active-high enable or fault-clear signal remains asserted during input-side brownout-critical for IGBT/SiC gate driver safety. |
| Ultra-low power at 100 Mbps | 16.4 mA per side at 5 V (typ), reducing thermal load in dense PCB layouts and enabling fanless industrial enclosure designs. |
| Precise channel-to-channel timing | 0.5 ns max skew enables synchronous sampling across multiple isolated ADCs or coordinated multi-phase PWM generation. |
| AEC-Q100 qualified option available | Automotive-grade variant (SI8663EC-B-AS1R) shares identical pinout and electrical specs-supports drop-in qualification for EV traction inverters. |
Applications
| Motor Control Systems | Isolated Switch-Mode Power Supplies |
|---|---|
|
Use Scenario: Isolating gate driver enable/fault signals and current-sense feedback in three-phase inverter stacks using SiC MOSFETs. IC Role / Device Role / Timing Role: Provides 3× isolated digital channels for PWM enable, DESAT fault reporting, and current-sense ADC synchronization. Use Value: 50 kV/µs CMTI prevents false triggering during 100 V/ns switching transients; 3.75 kVRMS rating satisfies IEC 61800-5-1 reinforced insulation. |
Use Scenario: Isolating feedback signals (voltage error, current limit) from secondary-side controller to primary-side PWM IC in LLC resonant converters. IC Role / Device Role / Timing Role: Transfers analog-derived digital status bits across isolation barrier with sub-10 ns latency and zero startup delay. Use Value: No initialization required enables immediate operation after power-on; 2.5–5.5 V supply range matches both 3.3 V optocoupler-replacement controllers and 5 V legacy ICs. |
| Industrial PLC I/O Modules | Battery Management Systems (BMS) |
|
Use Scenario: Digitally isolating discrete input status (e.g., emergency stop, sensor OK) and output commands (valve open/close) in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Replaces optocouplers with 3-channel input + 3-channel output configuration for compact 16-pin footprint. Use Value: 150 Mbps capability future-proofs for firmware update over isolated UART; Schmitt-trigger inputs tolerate long cable runs with EMI. |
Use Scenario: Isolating cell voltage monitoring data and balancing command signals between high-voltage battery stack (up to 1000 V) and low-voltage MCU domain. IC Role / Device Role / Timing Role: Transfers digital cell-status flags and balancing enable pulses across reinforced insulation barrier with fail-safe high default. Use Value: 3.75 kVRMS rating meets UL 62368-1 requirements for HV battery systems; –40 to 125 °C operation supports under-hood deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM161N0BRZ-RL7 | 6-channel, 150 Mbps, 3.75 kVRMS, SOIC-16 NB, default-low fail-safe | Requires external pull-ups for high-default behavior; higher 22 mA supply current at 100 Mbps | Select when existing layout uses ADI's iCoupler footprint and system logic requires low-default safety state. |
| ISO6763DR | 6-channel, 50 Mbps, 5 kVRMS, SOIC-16 WB, default-high fail-safe | Lower data rate limits use in high-speed feedback loops; wider package increases board area by 30% | Choose for cost-sensitive designs needing 5 kVRMS reinforcement where 150 Mbps is unnecessary. |
Compared with ADUM161N0BRZ-RL7 and ISO6763DR, the SI8663EC-B-IS1R uniquely combines 150 Mbps speed, 3.75 kVRMS isolation, narrow-body SOIC-16 footprint, and factory-configured high-default fail-safe-enabling compact, high-performance isolation in space-constrained motor drives and SMPS without design compromises.
Availability
SI8663EC-B-IS1R is available at Aetrix Electronics and suitable for industrial automation systems, isolated switch-mode supplies, and motor control applications requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.
Supply support for SI8663EC-B-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 applications.
The Si866x family was designed specifically for high-noise industrial and automotive power systems, delivering ultra-low-power, high-speed digital isolation with guaranteed lifetime reliability and safety certification across voltage, temperature, and lifetime.
FAQ
What is the isolation rating and safety certification status of SI8663EC-B-IS1R?
The SI8663EC-B-IS1R provides 3.75 kVRMS isolation and is certified to UL 1577, CSA Component Acceptance Notice 5A, VDE 0884-10, and CQC GB4943.1 standards for reinforced insulation. These certifications validate its suitability for industrial equipment meeting IEC 62368-1 and medical systems complying with IEC 60601-1, with full documentation available in Skyworks' regulatory compliance reports for SI8663EC-B-IS1R.
Does SI8663EC-B-IS1R require power-on initialization or configuration?
No, SI8663EC-B-IS1R requires no startup initialization or register configuration. It begins transmitting valid data within 40 µs of VDD application (tSU max), with outputs immediately following inputs once UVLO thresholds are exceeded. This zero-configuration operation simplifies firmware design and eliminates boot-time uncertainty in safety-critical systems using SI8663EC-B-IS1R.
How does the fail-safe default-high mode function in SI8663EC-B-IS1R during power loss?
In SI8663EC-B-IS1R, when VDD1 is unpowered (0 V) and VDD2 remains active, all three outputs (OUTA1–OUTA3) default to logic high due to internal pull-ups. This behavior is factory-set and ensures fail-safe activation of downstream circuits-such as keeping an IGBT gate driver enabled until primary-side power is restored-without external components.
What is the recommended bypass capacitance and placement for SI8663EC-B-IS1R?
Skyworks specifies a 0.1 µF ceramic capacitor between VDD1 and GND1, and another between VDD2 and GND2, placed within 3 mm of the respective pins. These capacitors suppress high-frequency noise coupling into the isolation barrier. For noisy environments, series resistors (50–300 Ω) may be added to inputs/outputs-verified in SI8663EC-B-IS1R layout guidelines.
Can SI8663EC-B-IS1R replace optocouplers in existing designs without PCB changes?
Yes, SI8663EC-B-IS1R uses a standard narrow-body SOIC-16 footprint compatible with common optocoupler footprints (e.g., 6-channel TLP290-4). Its pin-compatible replacement capability-confirmed via Skyworks' migration guide for SI8663EC-B-IS1R-enables drop-in upgrades with identical land patterns, eliminating PCB redesign while improving speed, lifetime, and CMTI performance.
SI8663EC-B-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):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8663EC-B-IS1R FAQ
1.How can I place an order for SI8663EC-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8663EC-B-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 SI8663EC-B-IS1R reliable?
The price and inventory of SI8663EC-B-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8663EC-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8663EC-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8663EC-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8663EC-B-IS1R?
SI8663EC-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8663EC-B-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 SI8663EC-B-IS1R?
For technical support, including SI8663EC-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8663EC-B-IS1R requirements.
6.How does Aetrix verify that SI8663EC-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8663EC-B-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 SI8663EC-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8663EC-B-IS1R?
All SI8663EC-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8663EC-B-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 SI8663EC-B-IS1R part is unused and in its original packaging.
Return procedure for SI8663EC-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8663EC-B-IS1R 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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