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Skyworks Solutions Inc. SI8606AC-B-IS1R
- Part No.:
- SI8606AC-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8606AC-B-IS1R.pdf
- Description:
- DGT ISOL 3750VRMS 4CH I2C 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,152
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Product details
Overview
SI8606AC-B-IS1R from Skyworks Solutions is a bidirectional I²C isolator with two unidirectional non-I²C channels, designed for galvanic isolation of SMBus and I²C interfaces in high-reliability systems. It delivers 1.7 MHz I²C bus speed, 3.75 kVRMS isolation rating, open-drain SDA/SCL outputs with 35 mA sink capability, and operates across –40 to +125 °C. It is used in battery management systems and isolated digital power supply communications where ground-loop elimination and hot-swap robustness are critical.
For engineers reviewing the SI8606AC-B-IS1R datasheet, SI8606AC-B-IS1R pinout, SI8606AC-B-IS1R application, or SI8606AC-B-IS1R equivalent, key selection considerations include its dual unidirectional auxiliary channel support (e.g., RESET/INT), narrow-body SOIC-16 package, AEC-Q100 qualification, and compatibility with 3.0–5.5 V supplies - all validated for automotive-grade operation without external anti-latch circuitry.
Technical Context
The SI8606AC-B-IS1R implements RF-based semiconductor isolation with independent transmitter/receiver pairs per channel, enabling true bidirectional I²C signal transfer while preventing latch-up via asymmetric logic thresholds (VOL > VIL on Side A). Its architecture supports I²C clock stretching and hot-swap insertion into powered systems without data corruption.
All four isolation channels - two bidirectional I²C (SDA/SCL) and two unidirectional (e.g., RESET/INT) - operate with CMOS-compatible input thresholds (VT+ = 1.67 V typ, VT– = 1.23 V typ), 50 Ω nominal output impedance, and 10 Mbps max data rate on non-I²C paths. Undervoltage lockout (UVLO) is implemented independently on AVDD and BVDD rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | Up to 1.7 MHz - enables full-speed I²C communication including clock stretching in SMBus-compliant systems. |
| Isolation Rating | 3.75 kVRMS - meets reinforced insulation requirements per IEC 60950-1 and UL 1577 for industrial and automotive safety-critical designs. |
| Supply Voltage | 3.0–5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level-shifting. |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive use and extended industrial environments. |
| Auxiliary Channels | 2 unidirectional - provides dedicated isolated paths for system signals such as RESET and INT, eliminating need for additional discrete isolators. |
| Output Sink Current | 35 mA - ensures reliable low-state drive into standard I²C pull-up networks (e.g., 1–3 kΩ) across temperature and voltage range. |
| Propagation Delay | 11–45 ns (typ) - preserves timing margins in high-speed I²C applications with minimal bus latency impact. |
| AEC-Q100 Grade | Qualified - confirms robustness for automotive applications including battery management systems and on-board chargers. |
Pinout & Package
SI8606AC-B-IS1R is housed in a RoHS-compliant narrow-body SOIC-16 package (5.3 mm width), with creepage/clearance optimized for 3.75 kVRMS working voltage. Pin assignments follow Skyworks' standardized Si8605/06 SOIC-16 layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Side A I²C & auxiliary inputs/outputs | ASDA, ASCL, AIN1, AIN2 - bidirectional I²C and unidirectional inputs referenced to AVDD/AGND. |
| 5, 6, 7, 8 | Side A power & ground | AVDD, AGND - supply and return for Side A logic and isolation transmitter. |
| 9, 10, 11, 12 | Side B I²C & auxiliary inputs/outputs | BSDA, BSCL, BIN1, BIN2 - isolated bidirectional I²C and unidirectional outputs referenced to BVDD/BGND. |
| 13, 14, 15, 16 | Side B power & ground | BVDD, BGND - supply and return for Side B logic and isolation receiver. |
Key Features
| Feature | Design Value |
|---|---|
| Anti-latch I²C architecture | Asymmetric VOL/VIL thresholds on Side A prevent bus latching without external components - reduces BOM count and PCB area. |
| Hot-swap capable | Protection circuits enable safe insertion into live systems - eliminates risk of data corruption during field maintenance or modular upgrades. |
| Dual unidirectional auxiliary channels | Supports isolated RESET and INT signaling alongside I²C - avoids need for separate isolators in BMS and OBC designs. |
| RF isolation technology | Delivers lower propagation delay and higher EMI immunity vs. optocouplers - improves timing predictability in noisy motor control or PoE environments. |
| 60-year life at rated voltage | Validated long-term reliability under continuous 3.75 kVRMS stress - supports 15+ year automotive and industrial product lifecycles. |
| Transient immunity | 50 kV/µs common-mode dv/dt rejection - maintains signal integrity in high-noise traction inverter gate-drive zones. |
Applications
| Battery Management Systems | On-Board Chargers |
|---|---|
Use Scenario: Isolating I²C communication between MCU and cell monitoring ICs across high-voltage battery packs (e.g., 400–800 V). IC Role / Device Role / Timing Role: SI8606AC-B-IS1R acts as a galvanically isolated I²C bridge with integrated RESET/INT channels, enabling safe telemetry and fault reporting. Use Value: Eliminates ground loops and prevents high-voltage transients from disrupting low-side controller operation - certified to AEC-Q100 and 3.75 kVRMS. | Use Scenario: Interfacing isolated MCU and AC/DC controller in EV on-board chargers, where primary and secondary sides require separation. IC Role / Device Role / Timing Role: SI8606AC-B-IS1R provides bidirectional I²C isolation for configuration and status exchange, plus isolated RESET for fault recovery. Use Value: Enables single-chip isolation of both data and control signals - reduces component count versus discrete isolator + level shifter solutions. |
| Power over Ethernet | Motor Control Systems |
Use Scenario: Isolating I²C between PSE controller and PD-side power management IC in IEEE 802.3bt PoE++ systems. IC Role / Device Role / Timing Role: SI8606AC-B-IS1R serves as the sole isolation barrier for SMBus communication and auxiliary interrupt signaling. Use Value: Meets reinforced insulation requirements (IEC 60950-1, UL 1577) while supporting 1.7 MHz bus speed - essential for real-time power negotiation. | Use Scenario: Isolating I²C telemetry from gate driver ICs and current sensors in industrial servo drives. IC Role / Device Role / Timing Role: SI8606AC-B-IS1R isolates bidirectional sensor calibration data and forwards fault interrupts across isolation boundary. Use Value: Withstands 50 kV/µs dv/dt transients common in SiC/GaN inverter switching - ensures uninterrupted diagnostics during PWM operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8606AD-B-IS | Same functionality but 5.0 kVRMS isolation rating and wide-body SOIC-16 package (7.5 mm width). | Suitable for higher-isolation systems requiring greater creepage (e.g., medical or grid-tied inverters). | Select SI8606AD-B-IS when 5.0 kVRMS certification or wider creepage is mandatory; otherwise SI8606AC-B-IS1R offers optimal cost/size balance. |
| ISO1540DR | TI device with 1.7 MHz I²C speed, 3.75 kVRMS, but only one unidirectional auxiliary channel and SOIC-8 package. | Limited to single auxiliary signal; lacks dual-channel flexibility for RESET+INT in compact BMS modules. | Choose ISO1540DR only if board space is constrained to SOIC-8 footprint and only one auxiliary signal is needed. |
Compared with SI8606AD-B-IS, SI8606AC-B-IS1R trades 1.25 kVRMS isolation margin for 2.2 mm narrower package and tape-and-reel delivery ('R' suffix); versus ISO1540DR, it adds a second auxiliary channel and SOIC-16 routing flexibility - critical for automotive BMS and OBC signal consolidation.
Availability
SI8606AC-B-IS1R is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and Power over Ethernet applications requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for SI8606AC-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.
The Si860x family was engineered specifically for robust, single-chip I²C/SMBus isolation in automotive and industrial systems - replacing optocoupler-based designs with RF-isolated devices offering superior speed, reliability, and integration.
FAQ
What is the maximum I²C bus frequency supported by the SI8606AC-B-IS1R?
The SI8606AC-B-IS1R supports a maximum I²C bus frequency of 1.7 MHz, as specified in the Skyworks Si860x datasheet. This enables full-speed operation including clock stretching required by SMBus-compliant devices. The timing performance is validated across –40 to +125 °C and 3.0–5.5 V supply range, with propagation delays ranging from 11 to 45 ns depending on signal edge and voltage level. SI8606AC-B-IS1R maintains this speed without external components or configuration.
Does the SI8606AC-B-IS1R support hot-swap insertion?
Yes, the SI8606AC-B-IS1R includes built-in protection circuits that guard against data errors during hot-swap insertion into a powered system. This capability is explicitly documented in the Si860x datasheet and stems from its internal undervoltage lockout (UVLO) architecture and asymmetric logic thresholds. Both Side A and Side B feature independent UVLO monitoring, ensuring controlled startup even when one side powers up before the other. SI8606AC-B-IS1R leverages this to enable field-replaceable module designs in automotive and industrial equipment.
How many isolation channels does the SI8606AC-B-IS1R provide, and what are their types?
The SI8606AC-B-IS1R provides four total isolation channels: two bidirectional I²C channels (SDA and SCL) and two unidirectional non-I²C channels (labeled AIN1/AIN2 and BIN1/BIN2). Unlike the Si8605 series, which offers one forward and one reverse unidirectional path, SI8606AC-B-IS1R configures both auxiliary channels as forward-only - ideal for signals like RESET and INT that originate on Side A and must be asserted on Side B. All channels are galvanically isolated using Skyworks' RF-based semiconductor barrier.
What is the isolation rating and safety certification status of the SI8606AC-B-IS1R?
The SI8606AC-B-IS1R is rated for 3.75 kVRMS isolation and certified to UL 1577, CSA Component Notice 5A, and IEC 60950-1 (reinforced insulation). It also meets IEC 60747-5-5 and carries CQC approval. These certifications are confirmed in the official Skyworks Si860x datasheet Rev. 206852A. As an automotive-grade part (indicated by the 'A' in the suffix), SI8606AC-B-IS1R further complies with AEC-Q100 Grade 0 and supports AIAG-compliant PPAP documentation - making it suitable for safety-critical vehicle subsystems.
What package type and dimensions does the SI8606AC-B-IS1R use?
The SI8606AC-B-IS1R uses a RoHS-compliant narrow-body SOIC-16 package measuring 10.3 mm × 5.3 mm × 1.75 mm (L × W × H), with 1.27 mm lead pitch. This package is distinct from the wide-body SOIC-16 (7.5 mm width) used by variants like SI8606AD-B-IS. The narrow-body variant optimizes PCB area in space-constrained automotive modules while maintaining 3.75 kVRMS working voltage and creepage ≥5.5 mm. SI8606AC-B-IS1R's 'R' suffix denotes tape-and-reel packaging for automated assembly.
SI8606AC-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:
- I2C
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/2
- Channel Type:
- Bidirectional, Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- -
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8606AC-B-IS1R FAQ
1.How can I place an order for SI8606AC-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8606AC-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 SI8606AC-B-IS1R reliable?
The price and inventory of SI8606AC-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 SI8606AC-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8606AC-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8606AC-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8606AC-B-IS1R?
SI8606AC-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8606AC-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 SI8606AC-B-IS1R?
For technical support, including SI8606AC-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8606AC-B-IS1R requirements.
6.How does Aetrix verify that SI8606AC-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8606AC-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 SI8606AC-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8606AC-B-IS1R?
All SI8606AC-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8606AC-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 SI8606AC-B-IS1R part is unused and in its original packaging.
Return procedure for SI8606AC-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8606AC-B-IS1R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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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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