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Skyworks Solutions Inc. SI8602AC-ASR
- Part No.:
- SI8602AC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8602AC-ASR.pdf
- Description:
- AUTOMOTIVE 3.75 KV UNI- AND BI-D
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
SI8602AC-ASR from Skyworks Solutions is a bidirectional I²C isolator with one unidirectional non-I²C channel, designed for galvanic isolation of SMBus and I²C interfaces in high-noise or high-voltage systems. It delivers 3.75 kVRMS isolation, supports up to 1.7 MHz I²C clock rates, features open-drain SDA/SCL outputs with 35 mA sink capability, and operates across –40 °C to +125 °C on 3.0–5.5 V supplies.
For engineers reviewing the SI8602AC-ASR datasheet, SI8602AC-ASR pinout, SI8602AC-ASR application, or SI8602AC-ASR equivalent, this device addresses critical I²C bus isolation challenges-including latch prevention, hot-swap robustness, and bidirectional signal integrity-while enabling compact, low-power designs in automotive BMS, PoE controllers, and isolated power management systems.
Technical Context
The SI8602AC-ASR implements RF-based semiconductor isolation with independent anti-latch circuitry on Side A to prevent bus latching during bidirectional I²C communication. Its dual-domain architecture separates AVDD/AGND and BVDD/BGND domains, each with independent undervoltage lockout (UVLO) monitoring and hot-swap protection.
It integrates two distinct channel types: a bidirectional I²C channel (SDA/SCL) with asymmetric logic thresholds (VIL = 0.41 V, VOL = 0.54 V typical on Side A) and one unidirectional CMOS digital channel supporting up to 10 Mbps with 50 Ω output impedance and ±0.44 V input hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | Up to 1.7 MHz - enables full-speed I²C operation 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 applications. |
| Supply Voltage | 3.0–5.5 V - supports direct interface with 3.3 V and 5 V microcontrollers without level-shifting. |
| Operating Temperature | –40 °C to +125 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive and industrial environments. |
| SDA/SCL Sink Current | 35 mA - ensures reliable low-state drive into standard I²C pull-up networks (e.g., 1–3 kΩ at 3.3 V). |
| Unidirectional Channel Data Rate | 10 Mbps - supports high-speed auxiliary signals such as RESET or INT in isolated power management subsystems. |
| Propagation Delay | 11–46 ns (I²C channels, 3.3 V) - enables tight timing budgets in real-time control loops and fast-response monitoring circuits. |
Pinout & Package
SI8602AC-ASR is housed in an 8-pin narrow-body SOIC package (SOIC-8 NB), with creepage/clearance optimized for 3.75 kVRMS reinforced insulation. Pin functions are validated per Skyworks Si860x datasheet Rev. 206852A, Section 6.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVDD) | Side A supply voltage | Power domain for bidirectional I²C inputs (ASDA, ASCL); must be decoupled with 0.1 µF capacitor to AGND. |
| 2 (ASDA) | Side A bidirectional SDA | Open-drain I²C data line with anti-latch logic; connects to master/slave SDA on isolated side A. |
| 3 (ASCL) | Side A bidirectional SCL | Open-drain I²C clock line with anti-latch logic; supports clock stretching and hot-swap insertion. |
| 4 (AGND) | Side A ground reference | Return path for AVDD; forms isolation barrier boundary with BGND; requires separate PCB plane. |
| 5 (BGND) | Side B ground reference | Return path for BVDD; electrically isolated from AGND; defines secondary safety domain. |
| 6 (BSCL) | Side B bidirectional SCL | Open-drain I²C clock line; mirrors ASCL state with propagation delay <46 ns (3.3 V). |
| 7 (BSDA) | Side B bidirectional SDA | Open-drain I²C data line; mirrors ASDA state with propagation delay <44 ns (3.3 V); supports multi-master arbitration. |
| 8 (BVDD) | Side B supply voltage | Power domain for bidirectional I²C outputs (BSDA, BSCL); decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Anti-latch bidirectional I²C channels | Prevents bus lockup by enforcing ΔVSDA/ΔVSCL ≥ 50 mV between Side A output low and input threshold - eliminates need for external latch-prevention circuitry. |
| 35 mA open-drain sink capability | Drives standard I²C pull-ups (1–3 kΩ) at 3.3 V while maintaining VOL ≤ 0.8 V across temperature - ensures noise margin and bus contention resilience. |
| Independent UVLO per side | Each domain (A/B) enters safe high-impedance state when its VDD drops below UVLO– threshold - prevents partial-power corruption in asymmetric supply faults. |
| 10 Mbps unidirectional channel | Supports high-speed auxiliary signals (e.g., RESET, INT) with 40 ns minimum pulse width - enables fast system-level fault signaling across isolation barrier. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with zero-defect manufacturing flow, PPAP documentation, and IMDS/CAMDS compliance - reduces qualification effort for OBC and BMS designs. |
Applications
| Automotive Battery Management | Power over Ethernet Controllers |
|---|---|
|
Use Scenario: Isolating I²C communication between MCU and cell monitor ICs in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: SI8602AC-ASR provides reinforced galvanic isolation for SDA/SCL lines while passing clock-stretching commands and status reads at 400 kHz. Use Value: Enables safe, EMC-robust telemetry acquisition without compromising I²C protocol integrity or requiring external anti-latch components. |
Use Scenario: Isolating I²C management interface between PSE controller and isolated PD-side power management ICs in IEEE 802.3af/at/bt systems. IC Role / Device Role / Timing Role: SI8602AC-ASR bridges I²C bus across primary/secondary domains while supporting hot-swap insertion of powered PD modules. Use Value: Prevents ground-loop-induced communication errors and meets SELV/PELV separation requirements for PoE end equipment certification. |
| Industrial Digital Power Supplies | Motor Control Gate Driver Interfaces |
|
Use Scenario: Isolating PMBus/I²C telemetry (voltage, current, temperature) between DSP/FPGA host and digitally controlled DC-DC converters in 48 V server PSUs. IC Role / Device Role / Timing Role: SI8602AC-ASR serves as a single-chip I²C isolator with integrated unidirectional channel for ALERT# signaling. Use Value: Reduces BOM count vs. discrete optocoupler + buffer solutions and maintains 1.7 MHz bandwidth for fast fault reporting. |
Use Scenario: Isolating I²C configuration and status interface between main controller and intelligent gate driver ICs in servo inverters. IC Role / Device Role / Timing Role: SI8602AC-ASR isolates SDA/SCL while using its unidirectional channel to forward FAULT# signals from gate driver to controller. Use Value: Provides simultaneous bidirectional configuration and unidirectional fault signaling in compact 8-pin footprint - avoids adding second isolator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1250ARZ | 2-channel, 1 Mbps max I²C speed; 2.5 kVRMS isolation; no unidirectional auxiliary channel. | Limited to lower-speed I²C buses; lacks dedicated high-speed auxiliary signal path for RESET/INT. | Choose ADUM1250ARZ only if 1 Mbps suffices and auxiliary channel is unnecessary - not suitable for 1.7 MHz or dual-signal isolation needs. |
| ISO1540DR | 2-channel, 1 Mbps max I²C speed; 3.75 kVRMS isolation; no auxiliary channel; requires external RC network for anti-latch. | Requires external components to prevent bus latching; higher layout complexity and larger footprint than SI8602AC-ASR. | Select ISO1540DR only when TI ecosystem alignment outweighs integration and performance trade-offs - SI8602AC-ASR offers superior speed, integration, and latch immunity. |
Compared with ADUM1250ARZ and ISO1540DR, SI8602AC-ASR uniquely combines 1.7 MHz I²C support, integrated anti-latch, 3.75 kVRMS rating, and a 10 Mbps auxiliary channel in an 8-pin SOIC - delivering higher bandwidth, smaller footprint, and reduced design risk for automotive and industrial isolation.
Availability
SI8602AC-ASR is available at Aetrix Electronics and suitable for automotive battery management systems, Power over Ethernet controllers, and industrial digital power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI8602AC-ASR 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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, isolation, and connectivity solutions for high-reliability applications.
The SI8602AC-ASR belongs to the Si860x family of RF-based digital isolators, engineered specifically for robust, low-latency galvanic isolation of I²C/SMBus interfaces in automotive, industrial, and communications infrastructure.
FAQ
What is the maximum I²C clock frequency supported by the SI8602AC-ASR?
The SI8602AC-ASR supports I²C bus speeds up to 1.7 MHz, verified per Skyworks Si860x datasheet Table 5.3. This enables full-speed operation including clock stretching in SMBus 2.0 and fast-mode-plus I²C applications. Performance is guaranteed across –40 °C to +125 °C and 3.0–5.5 V supply range.
Does the SI8602AC-ASR require external components for anti-latch protection?
No, the SI8602AC-ASR includes built-in anti-latch circuitry on Side A, eliminating the need for external resistors, capacitors, or additional isolators. Its asymmetric logic thresholds (VOL > VIL by ≥50 mV) inherently prevent bus latching - confirmed in datasheet Sections 3.2 and Table 5.3.
What isolation rating does the SI8602AC-ASR carry, and which standards does it meet?
The SI8602AC-ASR is rated for 3.75 kVRMS isolation and certified to UL 1577, CSA Component Notice 5A, VDE 0884-10 (reinforced), IEC 60950-1, and GB4943.1. These approvals are documented in the Si860x datasheet Safety Regulatory Approvals section and apply directly to the SI8602AC-ASR variant.
Can the SI8602AC-ASR operate with different supply voltages on Side A and Side B?
Yes, the SI8602AC-ASR supports independent 3.0–5.5 V supplies on AVDD and BVDD, enabling level translation between 3.3 V and 5 V I²C domains. Each side has its own UVLO circuit, ensuring safe operation even during asymmetric power sequencing - detailed in Section 4.2 of the datasheet.
Is the SI8602AC-ASR qualified for automotive applications?
Yes, the SI8602AC-ASR is an automotive-grade part (suffix "-A") qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C), with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect manufacturing flow - explicitly stated in Table 1.1 and Section 1 of the Si860x datasheet.
SI8602AC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- I2C
- Isolated Power:
- Yes
- Number of Channels:
- 1
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Bidirectional, Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 20ns, 20ns
- Pulse Width Distortion (Max):
- 12ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SI8602AC-ASR FAQ
1.How can I place an order for SI8602AC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8602AC-ASR 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 SI8602AC-ASR reliable?
The price and inventory of SI8602AC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8602AC-ASR is usually 5 days.
3.What payment methods are accepted for SI8602AC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8602AC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8602AC-ASR?
SI8602AC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8602AC-ASR 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 SI8602AC-ASR?
For technical support, including SI8602AC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8602AC-ASR requirements.
6.How does Aetrix verify that SI8602AC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8602AC-ASR 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 SI8602AC-ASR meets industry standards.
7.What is the process for return or replacement of SI8602AC-ASR?
All SI8602AC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8602AC-ASR, 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 SI8602AC-ASR part is unused and in its original packaging.
Return procedure for SI8602AC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8602AC-ASR Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
Texas Instruments
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