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Skyworks Solutions Inc. SI8642ED-AS
- Part No.:
- SI8642ED-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642ED-AS.pdf
- Description:
- AUTOMOTIVE 5 KV 2 FORWARD & 2 RE
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
SI8642ED-AS from Skyworks is a quad-channel digital isolator with 2 input channels on VDD1 side and 2 output channels on VDD2 side, providing reinforced 5 kVRMS isolation in a wide-body SOIC-16 package. It supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and features selectable high-default fail-safe mode for power-loss scenarios - used in battery management systems and traction inverters requiring robust galvanic separation.
For engineers reviewing the SI8642ED-AS datasheet, SI8642ED-AS pinout, SI8642ED-AS application, or SI8642ED-AS equivalent, key selection criteria include its 2:2 channel asymmetry, 5 kVRMS reinforced insulation (VDE 0884-10 certified), automotive-grade AEC-Q100 qualification, and tri-state enable control per side - critical for isolated motor control gate drivers and high-voltage DC-DC feedback loops.
Technical Context
The SI8642ED-AS implements RF-based on/off keying across a silicon dioxide isolation barrier, eliminating startup initialization and enabling deterministic timing behavior across –40°C to +125°C. Its dual-enable architecture (EN1 on Side A, EN2 on Side B) allows independent tri-state control of A3/A4 and B1/B2 outputs respectively.
It integrates Schmitt-trigger inputs for >50 kV/µs common-mode transient immunity and operates from 2.5–5.5 V supplies on both sides. The device meets reinforced insulation requirements per IEC 62368-1 and IEC 60601-1, with 60-year lifetime at rated working voltage and 8 mm creepage in the wide-body SOIC-16 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels (Input:Output) | 2:2 - Enables bidirectional signal routing across isolation barrier with independent enable control per side. |
| Max Data Rate | 150 Mbps - Supports high-speed serial interfaces like isolated SPI, RS-485 transceiver control, and PWM feedback in inverters. |
| Propagation Delay | 5–13 ns - Ensures tight timing alignment in real-time motor control and fast-loop isolated ADC/DAC systems. |
| Isolation Rating | 5 kVRMS reinforced - Certified to VDE 0884-10 and UL 1577; enables use in 1000 VDC+ battery systems without external creepage enhancement. |
| Fail-Safe Default | High - Output pins drive logic high during VDD1 loss while VDD2 remains powered - prevents unintended gate turn-off in IGBT/SiC drivers. |
| 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-shifting. |
| CMTI | 60 kV/µs typical - Maintains signal integrity in noisy high-dv/dt environments such as EV traction inverters and industrial VFDs. |
Pinout & Package
SI8642ED-AS uses a 16-pin wide-body SOIC package (WB SOIC-16, -IS suffix), offering 8 mm creepage and reinforced insulation compliance. Pin assignments are defined per Skyworks' official pinout diagram (Document 206329A, Section 5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channel inputs A1–A4 and EN1; must be ≥2.5 V for valid operation. |
| GND1 | Input-side ground | Reference for all Side A signals; requires low-inductance connection to local ground plane. |
| A1, A2 | Input channels | Digital inputs referenced to VDD1/GND1; accept 2.0–5.5 V logic levels with Schmitt-trigger hysteresis. |
| EN1 | Enable for A3/A4 outputs | Active-high control: drives A3/A4 into high-impedance when low - enables multiplexed or shared-bus configurations. |
| VDD2 | Output-side supply | Power for outputs B1–B4 and EN2; independent of VDD1 for true galvanic isolation. |
| GND2 | Output-side ground | Reference for all Side B signals; physically separated from GND1 by isolation barrier. |
| B1, B2 | Output channels | Isolated CMOS outputs referenced to VDD2/GND2; 50 Ω nominal impedance for controlled-impedance PCB routing. |
| EN2 | Enable for B1/B2 outputs | Active-high control: disables B1/B2 (Hi-Z) when low - supports dynamic output gating in safety-critical subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift issues of optocouplers; enables stable 150 Mbps operation over full automotive temperature range. |
| Tri-state enable per side | EN1 and EN2 allow independent high-impedance control of A3/A4 and B1/B2 - essential for bus arbitration and fault containment in multi-isolator systems. |
| Selectable fail-safe default (high) | Guarantees known output state during input-side power loss - prevents undefined gate drive in SiC/IGBT half-bridges during brownout conditions. |
| Reinforced VDE 0884-10 certification | Validated for 10 kV surge capability and 5 kVRMS working voltage - satisfies end-equipment requirements for EV chargers and medical power supplies. |
| AEC-Q100 Grade 1 qualification | Qualified for automotive applications from –40°C to +125°C ambient; includes PPAP documentation and IMDS/CAMDS compliance support. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADCs and pack contactor control signals in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: SI8642ED-AS provides 2× isolated analog front-end data paths and 2× isolated contactor driver enable signals across the main HV/LV barrier. Use Value: 5 kVRMS reinforced rating eliminates need for additional creepage extenders; high-default fail-safe prevents contactor dropout during MCU reset events. |
Use Scenario: Transmitting PWM gate signals and fault feedback between MCU and isolated gate drivers in 3-phase SiC inverter stacks. IC Role / Device Role / Timing Role: SI8642ED-AS delivers matched-propagation-delay isolated PWM channels (A1→B1, A2→B2) with independent EN2-controlled tri-state for safe shutdown. Use Value: <10 ns propagation delay and 0.5 ns channel skew preserve dead-time integrity; 60 kV/µs CMTI rejects inverter switching noise. |
| On-Board Charger (OBC) | Industrial Isolated ADC Interface |
|
Use Scenario: Isolating digital control signals between primary-side PFC controller and secondary-side LLC controller in bi-directional OBCs. IC Role / Device Role / Timing Role: SI8642ED-AS carries synchronous enable commands and status flags across the 1.5–2.5 kVRMS isolation barrier in AC/DC and DC/AC modes. Use Value: Dual-enable architecture allows coordinated soft-start sequencing; 150 Mbps headroom supports future firmware-upgrade communication channels. |
Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC1306) to host processors in motor drive current sensing and power quality analyzers. IC Role / Device Role / Timing Role: SI8642ED-AS routes oversampled bitstream data and clock synchronization signals across isolation boundary with minimal jitter addition. Use Value: 350 ps peak eye-jitter preserves ADC effective resolution; Schmitt-trigger inputs reject EMI-induced false triggering on long sensor traces. |
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; 25 kV/µs CMTI; 50 Mbps max data rate; 3.75 kVRMS basic isolation only. | Lacks reinforced 5 kVRMS rating and AEC-Q100 qualification; unsuitable for automotive traction systems or medical mains-connected equipment. | Consider for cost-sensitive industrial PLC I/O modules where 50 Mbps suffices and regulatory scope excludes reinforced insulation. |
| ISO7742FDWR | 4-channel, 2:2; 100 Mbps; 50 kV/µs CMTI; 5 kVRMS reinforced (VDE 0884-10); but no selectable fail-safe default - fixed low default. | Cannot guarantee high-output state during input-side power loss - limits use in gate driver enable paths requiring active-high safety defaults. | Prefer when system-level fail-safe logic resides upstream, or when default-low behavior aligns with control architecture (e.g., N-channel MOSFET gate drivers). |
Compared with ADUM2402BRWZ and ISO7742FDWR, SI8642ED-AS uniquely combines AEC-Q100 qualification, programmable high-default fail-safe, and 150 Mbps bandwidth within a single 5 kVRMS reinforced package - making it the only drop-in solution for next-generation EV powertrain controllers requiring functional safety and high-speed diagnostics.
Availability
SI8642ED-AS is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and isolated ADC interfaces requiring stable component supply across automotive and industrial production cycles.
Supply support for SI8642ED-AS 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 for high-reliability applications.
The Si864x family was designed specifically for automotive and industrial systems demanding high-speed, low-power, and safety-certified galvanic isolation - targeting EV powertrain, renewable energy inverters, and medical power supplies.
FAQ
What is the isolation rating and certification status of SI8642ED-AS?
SI8642ED-AS provides 5 kVRMS reinforced isolation and is certified to VDE 0884-10, UL 1577, CSA Component Notice 5A, and IEC 62368-1. It meets reinforced insulation requirements for medical (IEC 60601-1) and industrial equipment, with 10 kV surge capability. These certifications are validated for the exact SI8642ED-AS part number per Skyworks' official documentation.
Does SI8642ED-AS support independent enable control for each side?
Yes, SI8642ED-AS features EN1 on the input side (VDD1) to control A3/A4 outputs and EN2 on the output side (VDD2) to control B1/B2 outputs. Each enable input is active-high and places its respective outputs into high-impedance when deasserted - enabling flexible bus sharing and fault containment in complex isolated systems using SI8642ED-AS.
What is the default output state during input-side power loss for SI8642ED-AS?
SI8642ED-AS has a high-default fail-safe mode, meaning that when VDD1 is unpowered but VDD2 remains active, outputs B1 and B2 will drive logic high. This behavior is factory-configured per the "ED" ordering code and ensures safe gate driver states in power electronics applications where loss of MCU supply must not cause unintended device turn-off.
Is SI8642ED-AS qualified for automotive applications?
Yes, SI8642ED-AS is an automotive-grade part (denoted by the "-AS" suffix) and is fully qualified to AEC-Q100 Grade 1 (–40°C to +125°C). It is manufactured using automotive-specific process flows, supported with AIAG-compliant PPAP documentation, and listed in IMDS and CAMDS - confirming its suitability for EV battery systems and traction inverters.
What package type and creepage distance does SI8642ED-AS use?
SI8642ED-AS uses a 16-pin wide-body SOIC package (WB SOIC-16, -IS variant) with 8 mm creepage distance. This package meets reinforced insulation requirements for 5 kVRMS working voltage and is compatible with standard SOIC-16 land patterns while enabling high-voltage spacing needed in 800 V battery architectures.
SI8642ED-AS 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):
- 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-AS FAQ
1.How can I place an order for SI8642ED-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642ED-AS 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-AS reliable?
The price and inventory of SI8642ED-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642ED-AS is usually 5 days.
3.What payment methods are accepted for SI8642ED-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642ED-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642ED-AS?
SI8642ED-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642ED-AS 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-AS?
For technical support, including SI8642ED-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642ED-AS requirements.
6.How does Aetrix verify that SI8642ED-AS is sourced from the original manufacturer or authorized distributors?
All SI8642ED-AS 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-AS meets industry standards.
7.What is the process for return or replacement of SI8642ED-AS?
All SI8642ED-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8642ED-AS, 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-AS part is unused and in its original packaging.
Return procedure for SI8642ED-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642ED-AS 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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