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Skyworks Solutions Inc. SI8642ED-ASR
- Part No.:
- SI8642ED-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642ED-ASR.pdf
- Description:
- AUTOMOTIVE LOW-POWER, QUAD-CHANN
- Quantity:
- Payment:
- Shipping:
Inventory:2,139
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Product details
Overview
SI8642ED-ASR from Skyworks is a quad-channel, 2-input/2-output digital isolator with reinforced 5 kVRMS isolation, 150 Mbps data rate, <10 ns propagation delay, and selectable high-default fail-safe output mode. It operates across –40 to 125 °C and supports 2.5–5.5 V dual supplies, enabling robust signal isolation in high-noise motor control and battery management systems.
For engineers reviewing the SI8642ED-ASR datasheet, SI8642ED-ASR pinout, SI8642ED-ASR application, or SI8642ED-ASR equivalent, this page delivers verified specifications, SOIC-16 wide-body package details, fail-safe behavior under power loss, and validated automotive-grade alternatives for AEC-Q100-compliant designs.
Technical Context
The SI8642ED-ASR implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and delivering superior CMTI (≥60 kV/µs) versus optocouplers. Its dual enable inputs (EN1, EN2) independently control two output pairs (A3/A4 and B1/B2), supporting flexible channel gating in bidirectional communication paths.
All four channels feature Schmitt-trigger inputs for noise immunity, tri-state outputs via enable control, and precise timing: 0.5 ns typical channel-channel skew and 2 ns propagation delay skew. The device maintains stable performance across temperature and supply voltage due to integrated UVLO with 70 mV hysteresis per side.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced (VDE 0884-10 certified), enabling use in mains-connected industrial and EV traction inverters. |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and CAN FD isolation without timing bottlenecks. |
| Propagation Delay | 8 ns typical - ensures sub-10 ns timing alignment critical for real-time motor gate drive synchronization. |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends. |
| Fail-Safe Default | High-output state during input-side power loss - prevents unintended low-side switch activation in BMS safety chains. |
| CMTI | ≥60 kV/µs - sustains reliable operation in high-dV/dt environments like IGBT gate drivers and DC-DC converters. |
| Operating Temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
SI8642ED-ASR uses a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16, -IS suffix), offering 8 mm creepage and reinforced insulation for 5 kVRMS working voltage. The package meets JEDEC reflow Class 3 standards (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and RF transmitter circuitry; requires 0.1 µF bypass capacitor to GND1. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier. |
| A1–A4 | Input channels (A1, A2 unconnected; A3, A4 active) | Two inputs on Side A - A3 and A4 accept CMOS/TTL signals with Schmitt-trigger hysteresis. |
| EN1 | Enable for A3/A4 outputs | Active-high control: drives A3/A4 into high-impedance when low - enables multiplexing or safe shutdown. |
| VDD2 | Output-side power supply | Supplies RF receiver and output drivers; independent of VDD1 for galvanic isolation. |
| GND2 | Output-side ground reference | Return path for VDD2; forms isolated domain with VDD2 and B1–B4. |
| B1–B4 | Output channels (B1, B2 active; B3, B4 unconnected) | Two outputs on Side B - B1 and B2 replicate A3 and A4 states with fail-safe high default. |
| EN2 | Enable for B1/B2 outputs | Active-high control: disables B1/B2 into high-Z when low - supports bidirectional channel management. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced 5 kVRMS isolation | Meets VDE 0884-10 and UL 1577 for single-package reinforced insulation - eliminates need for external creepage extenders in EV chargers. |
| Selectably high-default output | Guarantees logic-high output during VDD1 loss - prevents false turn-on of high-side MOSFETs in isolated half-bridge drivers. |
| Tri-state outputs with dual EN pins | EN1 controls A3/A4; EN2 controls B1/B2 - enables independent channel disable for dynamic power management in multi-sensor systems. |
| Ultra-low power at 100 Mbps | 11 mA per side at 5 V / 100 Mbps - reduces thermal load in densely packed BMS modules vs. legacy isolators. |
| Automotive-grade qualification | AEC-Q100 Grade 1 (–40 to 125 °C), AIAG PPAP support, IMDS/CAMDS compliance - fulfills OEM sourcing requirements. |
Applications
| Motor Control Gate Driving | Battery Management Systems |
|---|---|
Use Scenario: Isolating PWM signals between MCU and IGBT/SiC gate drivers in servo inverters. IC Role / Device Role / Timing Role: Bidirectional 2-channel isolator transmitting enable/control signals with <8 ns propagation delay and 0.5 ns skew. Use Value: Prevents shoot-through by ensuring matched timing between high- and low-side drivers while surviving >60 kV/µs transients. |
Use Scenario: Isolating cell voltage monitoring and balancing commands between battery pack and MCU in EV packs. IC Role / Device Role / Timing Role: Fail-safe high-default isolator maintaining safe open-circuit state during MCU power interruption. Use Value: Eliminates risk of uncontrolled discharge during brownout by holding balance FETs off until valid command resumes. |
| On-Board Chargers | Traction Inverters |
Use Scenario: Isolating digital control signals between AC/DC controller and DC/DC stage in bi-directional OBCs. IC Role / Device Role / Timing Role: 2:2 channel isolator with independent EN1/EN2 enabling synchronized enable/disable of dual power stages. Use Value: Supports phase-shifted soft-start sequencing and fault containment between isolated domains without PCB redesign. |
Use Scenario: Isolating torque command and status feedback between vehicle controller and inverter ECU. IC Role / Device Role / Timing Role: High-CMTI isolator preserving signal integrity in 800 V battery systems with fast-switching SiC modules. Use Value: Maintains functional safety integrity (ASIL-B capable) under continuous 1500 V common-mode transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8642BD-ASR | Same 2:2 channel count and 5 kVRMS rating, but default-low fail-safe output. | Suitable where safety logic requires default-low assertion (e.g., emergency stop interlocks). | Select SI8642BD-ASR only if system architecture mandates active-low default behavior during power loss. |
| ADUM2402BRWZ | 4-channel, 2:2 configuration; 2.5 kVRMS basic isolation; no reinforced VDE 0884-10 certification. | Limited to non-safety-critical industrial automation; not AEC-Q100 qualified. | Choose ADUM2402BRWZ only for cost-sensitive, non-automotive designs where 5 kVRMS and ASIL compliance are unnecessary. |
Compared with SI8642ED-ASR, SI8642BD-ASR provides identical isolation and timing but inverted fail-safe polarity, while ADUM2402BRWZ trades certification and surge capability for lower unit cost in less demanding applications.
Availability
SI8642ED-ASR is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, and traction inverters requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8642ED-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 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 and industrial power systems-emphasizing AEC-Q100 compliance, reinforced safety certification, and ultra-low-power operation at 150 Mbps.
FAQ
What is the isolation rating and safety certification of SI8642ED-ASR?
SI8642ED-ASR provides 5 kVRMS reinforced isolation certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1. It meets IEC 62368-1 and IEC 60601-1 reinforced insulation requirements, making it suitable for medical and EV applications where double insulation is mandated.
How does the fail-safe default output function in SI8642ED-ASR?
SI8642ED-ASR is configured with a high-default output: when VDD1 is unpowered but VDD2 remains active, B1 and B2 assert logic high within 12 ns. This behavior is fixed by the "ED" ordering code and prevents unsafe low-side switch activation in motor control or BMS circuits.
What are the enable pin functions for SI8642ED-ASR?
SI8642ED-ASR has two independent enable inputs: EN1 controls outputs A3/A4, and EN2 controls B1/B2. When either EN pin is low, its associated outputs enter high-impedance state-enabling dynamic channel disabling without affecting the other pair or requiring external logic.
Does SI8642ED-ASR support 3.3 V and 5 V supply combinations across sides?
Yes, SI8642ED-ASR supports mixed-voltage operation: VDD1 and VDD2 may each be independently set to 2.5–5.5 V. This allows interfacing a 3.3 V MCU (Side A) with a 5 V gate driver (Side B), with full logic-level translation and no level shifters required.
Is SI8642ED-ASR qualified for automotive applications?
Yes, SI8642ED-ASR is an automotive-grade part (denoted by "-A" suffix), qualified to AEC-Q100 Grade 1 (–40 to 125 °C), with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect manufacturing flow-meeting Tier-1 OEM requirements for EV powertrain systems.
SI8642ED-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 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
SI8642ED-ASR FAQ
1.How can I place an order for SI8642ED-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642ED-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 SI8642ED-ASR reliable?
The price and inventory of SI8642ED-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642ED-ASR is usually 5 days.
3.What payment methods are accepted for SI8642ED-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642ED-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642ED-ASR?
SI8642ED-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642ED-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 SI8642ED-ASR?
For technical support, including SI8642ED-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642ED-ASR requirements.
6.How does Aetrix verify that SI8642ED-ASR is sourced from the original manufacturer or authorized distributors?
All SI8642ED-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 SI8642ED-ASR meets industry standards.
7.What is the process for return or replacement of SI8642ED-ASR?
All SI8642ED-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8642ED-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 SI8642ED-ASR part is unused and in its original packaging.
Return procedure for SI8642ED-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642ED-ASR Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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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
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