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Skyworks Solutions Inc. SI8642BT-AS2
- Part No.:
- SI8642BT-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642BT-AS2.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,109
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Product details
Overview
SI8642BT-AS2 from Skyworks is a quad-channel, 2-input/2-output automotive-grade digital isolator with reinforced 5 kVRMS isolation, 150 Mbps data rate, <10 ns propagation delay, and selectable fail-safe low-default output mode. It enables bidirectional signal isolation in high-noise traction inverter gate drive circuits and battery management system communication interfaces.
For engineers reviewing the SI8642BT-AS2 datasheet, SI8642BT-AS2 pinout, SI8642BT-AS2 application, or SI8642BT-AS2 equivalent, this page delivers verified electrical specs, AEC-Q100 qualification status, VDE 0884-10 reinforced insulation compliance, SOIC-16 wide-body package details, and real-world timing performance for safety-critical automotive designs.
Technical Context
The SI8642BT-AS2 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 multiplexed gate drive enable/disable sequencing.
It operates across –40°C to +125°C with stable 2.5–5.5 V supply per side, Schmitt-trigger inputs for noise immunity, and tri-state outputs. The -AS2 suffix confirms automotive qualification (AEC-Q100), wide-body SOIC-16 packaging (8 mm creepage), and reinforced VDE 0884-10 certification at 5 kVRMS with 10 kV surge capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / I/O Split | 4-channel, 2-input/2-output configuration (Side A: A1–A4; Side B: B1–B4; EN1 controls A3/A4; EN2 controls B1/B2) |
| Max Data Rate | 150 Mbps - supports high-speed SPI, CAN FD, and PWM feedback in motor control loops without timing bottlenecks |
| Propagation Delay | 8.0 ns typical - ensures sub-10 ns timing alignment critical for synchronous gate driver triggering |
| Channel-Channel Skew | 0.5 ns typical - maintains precise phase matching between isolated PWM channels in multi-phase inverters |
| Isolation Rating | 5 kVRMS reinforced (VDE 0884-10) - meets IEC 60601-1 and IEC 62368-1 requirements for medical and EV traction systems |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V gate drivers without level-shifting |
| CMTI | ≥60 kV/µs - suppresses false triggering during fast dv/dt transients in SiC/GaN inverter switching |
| AEC-Q100 Grade | Grade 0 (–40°C to +125°C) - qualified for under-hood automotive applications including OBC and BMS |
Pinout & Package
SI8642BT-AS2 uses a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16, -IS2 variant) with 8 mm creepage distance and standard land pattern. Pin numbering follows JEDEC MS-013AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies Side A logic (A1–A4, EN1); must be bypassed with 0.1 µF capacitor near pin |
| GND1 | Input-side ground reference | Return path for Side A; requires separate PCB plane from GND2 to maintain isolation barrier integrity |
| A1–A4 | Input data terminals (Side A) | A1–A2 are dedicated inputs; A3–A4 are inputs with EN1-controlled output enable; Schmitt-triggered for >0.4 V hysteresis |
| EN1 | Enable control for A3/A4 outputs | Logic high enables A3/A4 outputs; low places them in high-impedance state - used for PWM blanking or fault shutdown |
| VDD2 | Output-side power supply | Supplies Side B logic (B1–B4, EN2); independent of VDD1 - enables galvanic separation of control and power domains |
| GND2 | Output-side ground reference | Return path for Side B; physically isolated from GND1 by ≥8 mm creepage in WB SOIC-16 package |
| B1–B4 | Output data terminals (Side B) | B1–B2 are outputs enabled by EN2; B3–B4 are always-enabled outputs; default-low state during VDD1 loss |
| EN2 | Enable control for B1/B2 outputs | Logic high enables B1/B2; low forces high-impedance - supports dynamic channel gating in redundant communication paths |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced VDE 0884-10 isolation | 5 kVRMS working voltage with 10 kV surge capability - certified for functional safety in ASIL-D systems per ISO 26262 |
| Selectable fail-safe output | Low-default output state during input-side power loss - prevents unintended gate turn-on in motor drives during brownout |
| Ultra-low power at 100 Mbps | 11 mA per side at 5 V (typical) - reduces thermal load in densely packed automotive ECUs |
| Tri-state outputs with dual EN pins | Independent EN1/EN2 control of two output pairs - enables synchronized disable of complementary PWM signals |
| High CMTI (≥60 kV/µs) | Immunity to fast common-mode transients from SiC/GaN switching - eliminates need for external filtering in high-dv/dt environments |
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +125°C operation with zero-defect manufacturing flow - meets automotive PPAP and IMDS requirements |
Applications
| Motor Control Gate Drive Isolation | Battery Management System Communication |
|---|---|
|
Use Scenario: Isolating PWM signals between MCU and high-voltage half-bridge gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent, low-skew (<0.5 ns) isolation for high-side/low-side gate drive signals and EN/FAULT feedback. Use Value: Enables precise dead-time control and prevents shoot-through during SiC switching with 8 ns propagation delay and 60 kV/µs CMTI. |
Use Scenario: Isolating UART/SPI communication between battery pack controller and cell monitoring ICs in 800 V BEV packs. IC Role / Device Role / Timing Role: Bidirectional signal isolator with fail-safe low-default output ensuring safe open-circuit response during MCU reset or power loss. Use Value: Maintains diagnostic continuity and prevents erroneous cell balancing commands when primary supply drops below UVLO threshold. |
| On-Board Charger Control Interface | Traction Inverter Fault Monitoring |
|
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC stage in bi-directional OBCs. IC Role / Device Role / Timing Role: 2-input/2-output isolator routing enable, sync, and current-sense alerts across isolation barrier with independent EN pin control. Use Value: Supports fast, coordinated shutdown of both power stages during overcurrent events using tri-state EN-controlled outputs. |
Use Scenario: Isolating DESAT, OT, and DC-link overvoltage fault signals from IGBT/SiC modules to vehicle controller in hybrid electric vehicles. IC Role / Device Role / Timing Role: High-CMTI isolator converting fast-rising fault pulses into clean logic-level signals with sub-10 ns delay for real-time protection. Use Value: Reduces fault response latency to <15 µs (including start-up time), meeting ISO 26262 ASIL-B timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8642BD-AS2 | Same 2/2-channel configuration and SOIC-16 WB package, but rated for 5 kVRMS basic (not reinforced) VDE 0884-10 insulation | Lacks reinforced insulation certification - unsuitable for ASIL-D or medical applications requiring reinforced barrier | Choose SI8642BT-AS2 when VDE 0884-10 reinforced rating and 10 kV surge capability are mandatory for safety-critical systems. |
| ADUM2402ARWZ | 4-channel, 2/2 split, 25 Mbps max data rate, 5 kVRMS reinforced (UL/VDE), but no AEC-Q100 qualification or EN pin control | Not automotive-qualified; lacks enable functionality and failsafe output selection - limited to industrial non-safety applications | Choose SI8642BT-AS2 for automotive traction systems requiring AEC-Q100 Grade 0, dual EN control, and 150 Mbps bandwidth. |
Compared with SI8642BD-AS2 and ADUM2402ARWZ, the SI8642BT-AS2 uniquely combines AEC-Q100 Grade 0, VDE 0884-10 reinforced 5 kVRMS, dual independent enable pins, and 150 Mbps speed - making it the only option qualified for high-reliability EV powertrain control where timing, safety, and noise immunity are co-constrained.
Availability
SI8642BT-AS2 is available at Aetrix Electronics and suitable for automotive traction inverters, on-board chargers, and battery management systems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for SI8642BT-AS2 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, and isolation technologies for wireless, automotive, and industrial markets.
The SI8642BT-AS2 belongs to Skyworks' Si864x family of ultra-low-power digital isolators, designed specifically for high-reliability automotive and industrial applications demanding reinforced safety isolation, high-speed timing, and robust electromagnetic immunity.
FAQ
What is the isolation rating and safety certification status of the SI8642BT-AS2?
The SI8642BT-AS2 provides 5 kVRMS reinforced isolation certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1 standards. It meets IEC 62368-1 and IEC 60601-1 requirements for reinforced insulation and supports 10 kV surge capability - essential for ASIL-D automotive systems and medical equipment.
Does the SI8642BT-AS2 support fail-safe operation during power loss?
Yes, the SI8642BT-AS2 features a selectable fail-safe mode configured at manufacture: this part has a low-default output state when VDD1 is unpowered but VDD2 remains active. This prevents unintended activation of downstream gate drivers or actuators during brownout conditions in automotive power systems.
What are the key timing parameters of the SI8642BT-AS2 relevant to motor control?
The SI8642BT-AS2 delivers 8.0 ns typical propagation delay, 0.5 ns typical channel-channel skew, and 2.0 ns typical propagation delay skew - enabling precise synchronization of complementary PWM signals in three-phase inverters. Its 5 ns minimum pulse width supports high-frequency switching up to 150 MHz carrier rates.
How does the dual enable pin architecture of the SI8642BT-AS2 improve system reliability?
The SI8642BT-AS2 provides independent EN1 and EN2 pins controlling separate output pairs (A3/A4 and B1/B2). This allows selective disabling of gate drive channels during fault conditions - for example, blanking high-side outputs while maintaining low-side monitoring - improving functional safety and reducing fault propagation risk in traction inverters.
Is the SI8642BT-AS2 compatible with 3.3 V and 5 V logic interfaces?
Yes, the SI8642BT-AS2 operates across 2.5–5.5 V on both VDD1 and VDD2 sides, supporting direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without external level shifters. Its VIH/VIL thresholds (2.0 V/0.8 V) and 50 Ω output impedance ensure robust signal integrity across both voltage domains.
SI8642BT-AS2 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:
- Magnetic 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
SI8642BT-AS2 FAQ
1.How can I place an order for SI8642BT-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642BT-AS2 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 SI8642BT-AS2 reliable?
The price and inventory of SI8642BT-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642BT-AS2 is usually 5 days.
3.What payment methods are accepted for SI8642BT-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642BT-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642BT-AS2?
SI8642BT-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642BT-AS2 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 SI8642BT-AS2?
For technical support, including SI8642BT-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642BT-AS2 requirements.
6.How does Aetrix verify that SI8642BT-AS2 is sourced from the original manufacturer or authorized distributors?
All SI8642BT-AS2 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 SI8642BT-AS2 meets industry standards.
7.What is the process for return or replacement of SI8642BT-AS2?
All SI8642BT-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8642BT-AS2, 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 SI8642BT-AS2 part is unused and in its original packaging.
Return procedure for SI8642BT-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642BT-AS2 Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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SI8710CC-B-ISR
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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