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Skyworks Solutions Inc. SI8660EB-B-IUR
- Part No.:
- SI8660EB-B-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8660EB-B-IUR.pdf
- Description:
- DGTL ISO 2500VRMS 6CH GP 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,419
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Product details
Overview
SI8660EB-B-IUR from Skyworks is a six-channel, unidirectional digital isolator with all inputs on VDD1 side and zero inputs on VDD2 side (6:0 configuration), rated for 2.5 kVRMS isolation, 150 Mbps data rate, and 10 ns typical propagation delay. It features selectable high-default fail-safe output mode and operates across –40 to 125 °C in QSOP-16 package, enabling robust signal isolation in high-noise industrial motor drives and isolated power supplies.
For engineers reviewing the SI8660EB-B-IUR datasheet, SI8660EB-B-IUR pinout, SI8660EB-B-IUR application, or SI8660EB-B-IUR equivalent, this page delivers verified specifications including fail-safe logic state, CMTI of 50 kV/µs, 50 Ω output impedance, Schmitt-trigger input thresholds, and QSOP-16 terminal mapping - all confirmed from Skyworks' official Si8660/61/62/63 datasheet Rev. 206330A.
Technical Context
The SI8660EB-B-IUR implements RF-based on-off keying across a semiconductor isolation barrier, eliminating startup initialization and delivering deterministic timing without PLL lock or calibration. Its architecture supports independent undervoltage lockout (UVLO) on both VDD1 and VDD2 sides, with hysteresis of 70 mV and UVLO thresholds at 2.24 V (rising) and 2.16 V (falling).
All six channels are unidirectional from VDD1 to VDD2, with Schmitt-trigger inputs providing 0.44 V typical hysteresis and noise immunity up to 50 kV/µs common-mode transient immunity. The device defaults to high output during VDD1 power loss - a factory-configured fail-safe behavior confirmed in Table 1.1 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 6 unidirectional channels (VDD1 → VDD2 only); enables clean separation of control-side and power-side logic domains. |
| Max Data Rate | 150 Mbps; supports high-speed serial interfaces like SPI clocked above 50 MHz without bit errors. |
| Propagation Delay | 8.0 ns typical; ensures sub-10 ns timing alignment critical for real-time motor gate drive synchronization. |
| Isolation Rating | 2.5 kVRMS (1 min); certified to UL 1577, CSA 5A, VDE 0884-10, and IEC 62368-1 for reinforced insulation. |
| Fail-Safe Output | Default-high ('E' suffix); outputs remain logic high during VDD1 loss, preventing unintended low-side switch activation. |
| Supply Voltage Range | 2.5–5.5 V per side; allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| CMTI | 50 kV/µs minimum; rejects fast transients from IGBT switching in inverters without data corruption. |
Pinout & Package
SI8660EB-B-IUR is housed in a RoHS-compliant, lead-free QSOP-16 package (5.3 mm × 10.2 mm, 1.0 mm height) with 0.635 mm pitch and standard JEDEC land pattern. Pin numbering follows counterclockwise order from dot-marked Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VDD1) | Input-side supply | Power for all six input buffers and RF transmitter; bypass with 0.1 µF capacitor near pin. |
| Pin 2 (GND1) | Input-side ground | Reference return for VDD1 domain; must be separated from GND2 by ≥8 mm creepage in PCB layout. |
| Pins 3–8 (INA1–INA6) | Input signals | Schmitt-triggered logic inputs (VIH = 2.0 V, VIL = 0.8 V); tolerate slow edges and EMI without chatter. |
| Pin 9 (GND2) | Output-side ground | Reference return for VDD2 domain; galvanically isolated from GND1 by semiconductor barrier. |
| Pin 10 (VDD2) | Output-side supply | Power for RF receiver and six output drivers; supports independent 3.3 V or 5 V operation. |
| Pins 11–16 (OUTA1–OUTA6) | Isolated outputs | CMOS-compatible outputs (VOH ≥ VDD2–0.4 V, VOL ≤ 0.4 V); 50 Ω nominal impedance for controlled-impedance routing. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Outputs become valid within 40 µs of VDD application; eliminates boot-time uncertainty in safety-critical systems. |
| Selectable fail-safe mode | Factory-set high-default output prevents latch-up or false triggering when input-side power fails. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V (33 mA total for all six), reducing thermal load in dense PCB layouts. |
| Precise channel-to-channel timing | 0.5 ns typical skew ensures synchronized PWM edge delivery across multiple gate drivers. |
| Wide temperature operation | Specified from –40 to 125 °C ambient; maintains timing and isolation integrity in under-hood automotive or industrial enclosures. |
Applications
| Motor Control Gate Driving | Isolated ADC/DAC Interface |
|---|---|
|
Use Scenario: Isolating PWM signals from MCU to six IGBT/SiC gate drivers in a three-phase inverter. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator transmitting dead-time-controlled gate pulses with <10 ns propagation delay and <0.5 ns skew. Use Value: Prevents shoot-through by guaranteeing synchronized, jitter-free switching across all phases under 150 Mbps data rates. |
Use Scenario: Transmitting serial data between isolated ADC (e.g., AD7403) and host processor across ±1 kV working voltage. IC Role / Device Role / Timing Role: High-CMTI digital isolator preserving SPI clock/data integrity amid high dv/dt noise from adjacent power stages. Use Value: Enables accurate 16-bit measurement acquisition without data corruption, even during 50 kV/µs transients. |
| Industrial PLC Digital I/O | On-Board Charger Communication |
|
Use Scenario: Isolating 24 V DC field inputs and relay outputs in modular PLC backplanes. IC Role / Device Role / Timing Role: Fail-safe high-default isolator ensuring outputs go high (safe state) during input-side brownout or cable disconnect. Use Value: Eliminates need for external pull-ups and reduces BOM count while meeting SIL-2 functional safety requirements. |
Use Scenario: Isolating CAN FD communication lines between OBC controller and vehicle battery management system (BMS). IC Role / Device Role / Timing Role: Low-jitter (350 ps peak), high-data-rate isolator supporting CAN FD bit rates up to 5 Mbps with minimal latency. Use Value: Maintains deterministic CAN frame timing across isolation barrier, avoiding arbitration errors in high-voltage EV charging systems. |
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, default-low fail-safe, SOIC-16 wide-body (5 kVRMS rating) | Higher isolation (5 kVRMS) but larger footprint; lacks QSOP-16 option and automotive AEC-Q100 qualification | Choose for higher isolation voltage where board space permits and fail-safe low is acceptable. |
| ISO6760QDWR | 6-channel, 50 Mbps max, default-high fail-safe, SOIC-16 narrow-body (3.75 kVRMS), TI's reinforced insulation | Lower data rate limits use in high-speed SPI; qualified to AEC-Q100 Grade 1 but not Grade 0 (–40 to 125 °C) | Choose for cost-sensitive automotive applications requiring 3.75 kVRMS and Grade 1 temp range, not full Grade 0. |
Compared with ADUM161N0BRZ-RL7 and ISO6760QDWR, SI8660EB-B-IUR uniquely combines QSOP-16 compactness, 150 Mbps speed, AEC-Q100 Grade 0 qualification, and factory-set high-fail-safe behavior - making it optimal for space-constrained, high-speed industrial and EV on-board charger designs.
Availability
SI8660EB-B-IUR is available at Aetrix Electronics and suitable for industrial motor control, isolated power supply feedback loops, and automotive on-board chargers requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for SI8660EB-B-IUR 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 specifically for high-reliability industrial and automotive isolation needs - delivering ultra-low power, precise timing, and safety-certified reinforcement in compact packages like QSOP-16.
FAQ
What is the fail-safe behavior of SI8660EB-B-IUR?
The SI8660EB-B-IUR is factory-configured with a high-default fail-safe mode: when VDD1 is unpowered but VDD2 remains active, all six outputs (OUTA1–OUTA6) assert logic high. This behavior is defined by the 'E' in the part number and prevents unsafe low-side switch activation during input-side power loss - a critical feature for motor control and power supply applications.
Does SI8660EB-B-IUR require external components for basic operation?
Yes - SI8660EB-B-IUR requires two 0.1 µF ceramic bypass capacitors: one between VDD1 and GND1, and another between VDD2 and GND2, placed as close as possible to the respective pins. No external pull-ups, pull-downs, or level shifters are needed due to its Schmitt-trigger inputs and CMOS-compatible outputs.
Is SI8660EB-B-IUR qualified for automotive applications?
No - SI8660EB-B-IUR carries an industrial-grade suffix '-I' (as indicated by '-IUR'), meaning it meets JEDEC reliability standards but is not AEC-Q100 qualified. For automotive use, Skyworks offers the pin-compatible SI8660EB-AU variant, which undergoes full automotive process flows and PPAP documentation.
What is the maximum operating temperature for SI8660EB-B-IUR?
The SI8660EB-B-IUR is fully specified from –40 °C to +125 °C ambient temperature. Its electrical parameters - including propagation delay (8.0 ns typ), CMTI (50 kV/µs min), and supply current - remain stable across this full range, enabling deployment in under-hood automotive modules and industrial enclosures without derating.
Can SI8660EB-B-IUR be used for bidirectional communication?
No - SI8660EB-B-IUR is strictly unidirectional: all six channels transmit only from VDD1-side inputs (INA1–INA6) to VDD2-side outputs (OUTA1–OUTA6). For bidirectional isolation, Skyworks offers variants like SI8663EB-B-IU (3:3 configuration), but SI8660EB-B-IUR does not support reverse data flow or shared bus protocols like I²C without external logic.
SI8660EB-B-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (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:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 4ns, 4ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI8660EB-B-IUR FAQ
1.How can I place an order for SI8660EB-B-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8660EB-B-IUR 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 SI8660EB-B-IUR reliable?
The price and inventory of SI8660EB-B-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8660EB-B-IUR is usually 5 days.
3.What payment methods are accepted for SI8660EB-B-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8660EB-B-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8660EB-B-IUR?
SI8660EB-B-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8660EB-B-IUR 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 SI8660EB-B-IUR?
For technical support, including SI8660EB-B-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8660EB-B-IUR requirements.
6.How does Aetrix verify that SI8660EB-B-IUR is sourced from the original manufacturer or authorized distributors?
All SI8660EB-B-IUR 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 SI8660EB-B-IUR meets industry standards.
7.What is the process for return or replacement of SI8660EB-B-IUR?
All SI8660EB-B-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8660EB-B-IUR, 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 SI8660EB-B-IUR part is unused and in its original packaging.
Return procedure for SI8660EB-B-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8660EB-B-IUR 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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