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Skyworks Solutions Inc. SI8660BA-AS1R
- Part No.:
- SI8660BA-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8660BA-AS1R.pdf
- Description:
- AUTOMOTIVE 1 KV 6-CHANNEL DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:1,613
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Product details
Overview
SI8660BA-AS1R from Skyworks is a six-channel, unidirectional digital isolator with 6 inputs on VDD1 side and 0 on VDD2 side, rated for 1.0 kVRMS isolation, low-power operation (1.6 mA/channel @ 1 Mbps, 5 V), and 150 Mbps data rate. It features Schmitt-trigger inputs, selectable fail-safe low-default output, and operates across –40 to 125 °C in narrow-body SOIC-16 packaging - deployed in isolated switch-mode power supplies and industrial automation interfaces.
For engineers reviewing the SI8660BA-AS1R datasheet, SI8660BA-AS1R pinout, SI8660BA-AS1R application, or SI8660BA-AS1R equivalent, key selection criteria include its 1.0 kVRMS isolation rating, narrow-body SOIC-16 footprint, fail-safe low-output configuration, sub-10 ns propagation delay, and automotive-grade AEC-Q100 qualification - all critical for space-constrained, safety-aware industrial and on-board charger designs.
Technical Context
The SI8660BA-AS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its dual-supply architecture (VDD1/VDD2) supports independent 2.5–5.5 V operation per side, with undervoltage lockout (UVLO+ = 2.24 V typ) ensuring clean state transitions during power sequencing.
All six channels are unidirectional input-only on the VDD1 side, with outputs referenced to VDD2. The device uses Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ) and delivers precise timing: 8.0 ns typical propagation delay, 0.5 ns channel-channel skew, and 5 ns minimum pulse width - enabling high-fidelity signal integrity in fast-switching gate-drive and ADC isolation paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 6 unidirectional channels, all inputs on VDD1 side, no inputs on VDD2 side - enables asymmetric signal routing in isolated feedback loops. |
| Isolation Rating | 1.0 kVRMS for 1 minute - meets basic insulation requirements for non-reinforced applications like auxiliary power monitoring. |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces including SPI clock domains up to 75 MHz. |
| Propagation Delay | 8.0 ns typical - ensures sub-10 ns timing alignment critical for synchronous motor control PWM signals. |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with both 3.3 V microcontrollers and 5 V legacy logic. |
| Fail-Safe Default | Low output when VDD1 unpowered - prevents unintended activation of downstream MOSFET gates during brownout. |
| Operating Temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient environments. |
Pinout & Package
SI8660BA-AS1R is housed in a RoHS-compliant narrow-body SOIC-16 package (5.3 mm width, 10.3 mm length), with creepage/clearance compliant to IEC 60950-1 for basic insulation at 1.0 kVRMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for all six input buffers and RF transmitter; bypass with 0.1 µF capacitor near pin. |
| GND1 | Input-side ground | Reference return for VDD1 and all six input signals; must be separated from GND2 by isolation barrier. |
| IN1–IN6 | Digital inputs | Schmitt-triggered logic inputs accepting 2.0–5.5 V signals; no external pull-ups required for fail-safe low mode. |
| VDD2 | Output-side supply | Power for RF receiver and six output drivers; supports independent voltage domain from VDD1. |
| GND2 | Output-side ground | Reference return for VDD2 and all six outputs; galvanically isolated from GND1. |
| OUT1–OUT6 | Digital outputs | CMOS-compatible outputs with ~50 Ω impedance; drive 15 pF loads directly at 150 Mbps with <4 ns rise/fall times. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; provides stable 60-year lifetime at rated working voltage. |
| Selectably fail-safe output | Factory-configured low-default state ensures safe deactivation of power stages during input-side power loss. |
| Ultra-low power at 1 Mbps | 1.6 mA per channel at 5 V enables <10 mW total active power in isolated sensor interface applications. |
| High CMTI immunity | 50 kV/µs common-mode transient immunity prevents glitches in noisy motor drive or inverter environments. |
| No start-up initialization | Valid output within 40 µs of VDD application - eliminates boot-time uncertainty in real-time control systems. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating PWM signals from MCU to gate drivers in 3-phase inverters for HVAC compressors. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator transmitting high-frequency PWM edges with <8 ns propagation delay and <0.5 ns skew between channels. Use Value: Enables precise phase-aligned switching across all three legs, reducing torque ripple and EMI in variable-speed drives. |
Use Scenario: Providing isolated feedback for secondary-side voltage regulation in 1 kW telecom rectifiers. IC Role / Device Role / Timing Role: Transmitting error amplifier output and current-sense signals across isolation barrier with 150 Mbps capability and 5 ns minimum pulse width. Use Value: Supports fast transient response and tight output regulation without optocoupler latency or gain drift. |
| Battery Management System (BMS) | Industrial PLC Digital I/O Module |
Use Scenario: Isolating cell voltage measurement and balancing command signals in automotive traction battery packs. IC Role / Device Role / Timing Role: Six-channel isolator delivering AEC-Q100-qualified communication between isolated MCU and analog front-end ICs. Use Value: Ensures functional safety compliance (IEC 61508 SIL-2) while maintaining 125 °C operation and 1.0 kVRMS working voltage. |
Use Scenario: Galvanically separating field-side 24 V digital inputs from 3.3 V controller logic in modular PLC backplanes. IC Role / Device Role / Timing Role: Replacing six discrete optocouplers with single SI8660BA-AS1R to reduce board area and improve channel-to-channel timing consistency. Use Value: Cuts BOM count by 83%, eliminates LED aging drift, and improves noise immunity via 50 kV/µs CMTI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8660BB-AS1R | Same 6-input/0-output channel count and SOIC-16 NB package, but rated for 2.5 kVRMS isolation instead of 1.0 kVRMS. | Required where reinforced insulation or higher working voltage (e.g., 300 VDC bus monitoring) is mandated by end-equipment safety standards. | Choose SI8660BB-AS1R if system-level certification requires >1.0 kVRMS isolation; otherwise SI8660BA-AS1R offers cost and size advantage. |
| ISO6760DR | Texas Instruments' 6-channel isolator in SOIC-16 NB; 5000 VRMS reinforced rating, 50 Mbps max data rate, higher quiescent current (3.5 mA/channel @ 1 Mbps). | Targeted at UL/CSA/VDE-certified industrial equipment requiring reinforced insulation, not basic insulation. | Choose ISO6760DR only if 5 kVRMS certification is mandatory; SI8660BA-AS1R provides superior speed, lower power, and smaller footprint for 1 kVRMS use cases. |
Compared with SI8660BB-AS1R, SI8660BA-AS1R reduces isolation margin to optimize cost and layout density for basic-insulation applications; versus ISO6760DR, it delivers 3× higher data rate and 50% lower active power at equivalent channel count - making it optimal for space- and performance-constrained industrial and automotive subsystems.
Availability
SI8660BA-AS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and battery management systems requiring stable component supply, AEC-Q100 qualification, and narrow-body SOIC-16 compatibility.
Supply support for SI8660BA-AS1R 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.
The Si866x family was designed to replace optocouplers in high-reliability industrial and automotive systems, delivering CMOS-based digital isolation with superior speed, longevity, and temperature stability.
FAQ
What is the isolation rating and certification status of SI8660BA-AS1R?
SI8660BA-AS1R is rated for 1.0 kVRMS isolation for 1 minute and certified to UL 1577, CSA Component Acceptance Notice 5A, and VDE 0884-10 for basic insulation. It is not rated for reinforced insulation; for that, SI8660BB-AS1R (2.5 kVRMS) or wide-body variants are required. All certifications apply specifically to the SI8660BA-AS1R narrow-body SOIC-16 configuration.
Does SI8660BA-AS1R support bidirectional communication?
No, SI8660BA-AS1R is strictly unidirectional: all six channels transmit from VDD1-side inputs to VDD2-side outputs only. It does not support reverse-direction signaling. For bidirectional isolation, engineers must select other members of the Si866x family such as SI8663xx variants, or use separate dedicated isolators for each direction.
What is the default output behavior of SI8660BA-AS1R during input-side power loss?
SI8660BA-AS1R is configured with fail-safe low-default output: when VDD1 is unpowered (0 V) and VDD2 remains active, all six outputs (OUT1–OUT6) drive logic low. This prevents unintended turn-on of downstream power switches and aligns with functional safety requirements in motor control and power conversion systems.
Can SI8660BA-AS1R operate with mixed supply voltages, e.g., 3.3 V on VDD1 and 5 V on VDD2?
Yes, SI8660BA-AS1R supports independent supply voltages from 2.5 V to 5.5 V on VDD1 and VDD2. It is fully specified for simultaneous 3.3 V input-side and 5 V output-side operation, with validated timing, noise immunity, and drive strength - enabling seamless interfacing between low-voltage controllers and higher-voltage gate drivers or ADCs.
Is SI8660BA-AS1R pin-compatible with other Si866x variants in SOIC-16 narrow-body packages?
Yes, all Si866x devices in the narrow-body SOIC-16 package (e.g., SI8660BA-AS1R, SI8660BB-AS1R, SI8661BB-AS1R) share identical pinouts and land patterns. Channel count and directionality differ by part number, but PCB layout and soldering processes are fully interchangeable - simplifying design reuse and variant management.
SI8660BA-AS1R 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:
- Yes
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1000Vrms
- 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:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8660BA-AS1R FAQ
1.How can I place an order for SI8660BA-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8660BA-AS1R 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 SI8660BA-AS1R reliable?
The price and inventory of SI8660BA-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8660BA-AS1R is usually 5 days.
3.What payment methods are accepted for SI8660BA-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8660BA-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8660BA-AS1R?
SI8660BA-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8660BA-AS1R 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 SI8660BA-AS1R?
For technical support, including SI8660BA-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8660BA-AS1R requirements.
6.How does Aetrix verify that SI8660BA-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8660BA-AS1R 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 SI8660BA-AS1R meets industry standards.
7.What is the process for return or replacement of SI8660BA-AS1R?
All SI8660BA-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8660BA-AS1R, 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 SI8660BA-AS1R part is unused and in its original packaging.
Return procedure for SI8660BA-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8660BA-AS1R 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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