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Skyworks Solutions Inc. SI8642ET-IS2
- Part No.:
- SI8642ET-IS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642ET-IS2.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
SI8642ET-IS2 from Skyworks is a quad-channel digital isolator with 2 input/2 output channel configuration, 5 kVRMS reinforced isolation rating, and high-speed operation up to 150 Mbps. It features selectable fail-safe default-high output mode, Schmitt trigger inputs for noise immunity, and operates across –40 to 125 °C for use in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8642ET-IS2 datasheet, SI8642ET-IS2 pinout, SI8642ET-IS2 application, or SI8642ET-IS2 equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world automotive and industrial use cases, and two confirmed alternative parts with documented functional and safety certification differences.
Technical Context
The SI8642ET-IS2 implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical components. Its dual enable inputs (EN1, EN2) independently control A3/A4 and B1/B2 outputs, supporting tri-state operation per side.
It supports bidirectional DC–150 Mbps data transfer with precise timing: <10 ns typical propagation delay, ≤2 ns propagation skew, and ≤0.5 ns channel-to-channel skew. Reinforced VDE 0884-10 certification (10 kV surge capable) and 5 kVRMS working voltage are validated for wide-body SOIC-16 IS2 package with 8 mm creepage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation, certified to VDE 0884-10 (10 kV surge capable) |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and CAN FD physical layer signaling |
| Propagation Delay | 5–13 ns - enables tight timing budgets in closed-loop motor control and real-time power converter feedback |
| Supply Voltage | 2.375–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends |
| Channel Configuration | 2-input / 2-output (A3,A4,B1,B2) - matches asymmetric signal routing in isolated ADC/DAC and gate driver control paths |
| Fail-Safe Mode | Default-high output - ensures safe logic-high state during VDD1 loss in critical BMS or inverter enable circuits |
| Common-Mode Immunity | 60 kV/µs (typical) - maintains signal integrity in high-dV/dt environments like traction inverters and SMPS |
Pinout & Package
SI8642ET-IS2 uses a RoHS-compliant wide-body SOIC-16 package (IS2 variant), featuring tie-bar-free construction for 8 mm creepage while retaining standard WB SOIC-16 land pattern compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channels A3/A4 and EN1; must be ≥2.375 V for valid operation |
| GND1 | Input-side ground | Reference for A3, A4, EN1, and VI inputs; requires local 0.1 µF bypass |
| A3, A4 | Input signals (Side A) | Digital inputs with Schmitt trigger thresholds (VT+ = 1.67 V typ, VT– = 1.23 V typ) |
| EN1 | Enable for A3/A4 outputs | Active-high control: drives A3/A4 outputs to high-impedance when low |
| VDD2 | Output-side supply | Power for B1/B2 outputs and EN2; independent of VDD1 for true galvanic isolation |
| GND2 | Output-side ground | Reference for B1, B2, EN2; isolated from GND1 by 5 kVRMS barrier |
| B1, B2 | Isolated output signals (Side B) | CMOS outputs with 50 Ω nominal impedance; default-high during VDD1 loss |
| EN2 | Enable for B1/B2 outputs | Active-high control: drives B1/B2 to high-impedance when low |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced VDE 0884-10 certification | Validated 10 kV surge capability and 5 kVRMS working voltage for IEC 62368-1 and IEC 60601-1 end-equipment compliance |
| Tri-state enable per side | Independent EN1/EN2 pins allow dynamic isolation of A3/A4 or B1/B2 without affecting other channels |
| Ultra-low power at 100 Mbps | 11 mA per side (typ) at 5 V - reduces thermal load in densely packed BMS and OBC modules |
| Precise timing uniformity | ≤0.5 ns channel-to-channel skew enables synchronized sampling across dual isolated ADCs |
| Automotive-grade qualification | AEC-Q100 qualified with AIAG PPAP support - meets zero-defect requirements for EV traction systems |
Applications
| Battery Management Systems (BMS) | Motor Control Gate Drivers |
|---|---|
Use Scenario: Isolating cell voltage monitoring and pack contactor control signals between high-voltage battery stack and low-voltage MCU. IC Role / Device Role / Timing Role: SI8642ET-IS2 transmits fault status and precharge commands across 5 kVRMS barrier with <10 ns propagation delay. Use Value: Default-high fail-safe ensures contactor remains closed during transient input supply loss, preventing unsafe shutdown. |
Use Scenario: Transmitting PWM signals from MCU to isolated gate drivers in 3-phase inverter stages. IC Role / Device Role / Timing Role: SI8642ET-IS2 carries complementary high-side/low-side drive signals with ≤0.5 ns skew to minimize shoot-through risk. Use Value: 150 Mbps data rate supports >100 kHz PWM carrier frequencies with clean edge fidelity and 60 kV/µs CMTI. |
| On-Board Chargers (OBC) | Isolated Analog Front-Ends |
Use Scenario: Communicating AC detection, DC link voltage, and thermal alerts between primary and secondary sides of bidirectional OBC. IC Role / Device Role / Timing Role: SI8642ET-IS2 routes control/status signals across reinforced barrier using EN1/EN2 for power sequencing coordination. Use Value: VDE 0884-10 certification satisfies reinforced insulation requirements for EVSE safety standards (IEC 61851-23). |
Use Scenario: Isolating SPI clock/data lines between isolated ADC (e.g., AMC1306) and host processor in current sensing subsystems. IC Role / Device Role / Timing Role: SI8642ET-IS2 delivers synchronized sample-ready and conversion-data signals with sub-ns skew. Use Value: 2.5–5.5 V dual-supply flexibility allows direct interfacing with 3.3 V ADCs and 5 V MCUs without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 4-channel, 2/2 configuration, 2.5 kVRMS basic isolation, no VDE 0884-10 reinforcement | Lacks 5 kVRMS and 10 kV surge rating; unsuitable for reinforced insulation end-equipment | Select only for non-safety-critical industrial automation where UL 1577 alone suffices |
| ISO6742QDWR | 4-channel, 2/2 configuration, 5 kVRMS reinforced, but only 50 Mbps max data rate and no AEC-Q100 | Insufficient speed for >50 MHz SPI or fast PWM; not qualified for automotive temperature range | Prefer for cost-sensitive industrial PLCs where 150 Mbps is unnecessary and automotive qualification is not required |
Compared with ADUM2402BRWZ and ISO6742QDWR, SI8642ET-IS2 uniquely combines 150 Mbps speed, VDE 0884-10 reinforced certification, AEC-Q100 qualification, and default-high fail-safe mode-making it the only option qualified for high-speed, safety-critical EV powertrain applications requiring 5 kVRMS working voltage.
Availability
SI8642ET-IS2 is available at Aetrix Electronics and suitable for battery management systems, motor control gate drivers, and on-board chargers requiring stable component supply across automotive and industrial production lifecycles.
Supply support for SI8642ET-IS2 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 Si864x family was designed specifically for high-reliability, high-speed digital isolation in automotive electrification and industrial power systems-emphasizing reinforced safety certification, ultra-low power, and precise timing.
FAQ
What is the isolation rating and safety certification of SI8642ET-IS2?
SI8642ET-IS2 provides 5 kVRMS reinforced isolation and is certified to VDE 0884-10 (10 kV surge capable), UL 1577, CSA 5A, and CQC GB4943.1. These certifications validate its use in end-equipment requiring reinforced insulation per IEC 62368-1 and IEC 60601-1, including electric vehicle battery systems and medical power supplies.
Does SI8642ET-IS2 support fail-safe operation, and what is its default state?
Yes, SI8642ET-IS2 is ordered with selectable fail-safe mode; the "ET" suffix indicates default-high output. When VDD1 is unpowered but VDD2 remains active, B1 and B2 outputs remain logic high-critical for maintaining safe states in contactor control and enable circuits within SI8642ET-IS2-based designs.
What package type does SI8642ET-IS2 use, and how does IS2 differ from IS?
SI8642ET-IS2 uses a wide-body SOIC-16 package with IS2 footprint. The IS2 variant eliminates internal tie bars to achieve 8 mm creepage distance while maintaining identical land pattern and dimensions as standard WB SOIC-16 (IS), ensuring drop-in PCB compatibility without layout changes.
Can SI8642ET-IS2 operate with different supply voltages on each side?
Yes, SI8642ET-IS2 supports independent 2.375–5.5 V supplies on VDD1 and VDD2. This allows interfacing a 3.3 V microcontroller (VDD1) with a 5 V isolated gate driver (VDD2), and both sides function correctly even if one supply is absent-enabling flexible power domain partitioning in SI8642ET-IS2 implementations.
Is SI8642ET-IS2 qualified for automotive applications?
Yes, SI8642ET-IS2 is AEC-Q100 qualified for Grade 0 (–40 to +125 °C) and supported with AIAG-compliant PPAP documentation. Its manufacturing flow includes zero-defect methodology and IMDS/CAMDS listings-making SI8642ET-IS2 suitable for traction inverters, on-board chargers, and battery management systems in BEV/HEV platforms.
SI8642ET-IS2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 60kV/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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8642ET-IS2 FAQ
1.How can I place an order for SI8642ET-IS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642ET-IS2 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 SI8642ET-IS2 reliable?
The price and inventory of SI8642ET-IS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642ET-IS2 is usually 5 days.
3.What payment methods are accepted for SI8642ET-IS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642ET-IS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642ET-IS2?
SI8642ET-IS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642ET-IS2 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 SI8642ET-IS2?
For technical support, including SI8642ET-IS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642ET-IS2 requirements.
6.How does Aetrix verify that SI8642ET-IS2 is sourced from the original manufacturer or authorized distributors?
All SI8642ET-IS2 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 SI8642ET-IS2 meets industry standards.
7.What is the process for return or replacement of SI8642ET-IS2?
All SI8642ET-IS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8642ET-IS2, 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 SI8642ET-IS2 part is unused and in its original packaging.
Return procedure for SI8642ET-IS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642ET-IS2 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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