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Skyworks Solutions Inc. SI8642BD-B-IS2R
- Part No.:
- SI8642BD-B-IS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642BD-B-IS2R.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
SI8642BD-B-IS2R 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 (IS2 variant with 8 mm creepage). It supports DC–150 Mbps data rates, achieves ≤13 ns propagation delay, and operates across –40 to 125 °C with fail-safe default-low output state - used in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8642BD-B-IS2R datasheet, SI8642BD-B-IS2R pinout, SI8642BD-B-IS2R application, or SI8642BD-B-IS2R equivalent, key selection criteria include its 5 kVRMS reinforced insulation rating, dual-enable control (EN1/EN2), Schmitt-trigger inputs for noise immunity, and ultra-low power consumption (11 mA per side at 100 Mbps, 5 V).
Technical Context
The SI8642BD-B-IS2R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture delivers precise timing with ≤2.5 ns channel-channel skew and ≤4.5 ns propagation delay skew.
It features two independent enable inputs (EN1 on Side A, EN2 on Side B) that place respective output pairs (A3/A4 and B1/B2) into high-impedance state when low. The device uses Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ) and supports 2.5–5.5 V dual-supply operation with undervoltage lockout (UVLO+ = 2.24 V, UVLO– = 2.16 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation (UL, VDE, CQC certified); enables use in mains-connected industrial inverters and EV traction systems. |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and PWM feedback loops in real-time motor control. |
| Propagation Delay | ≤13 ns max - ensures tight timing alignment between isolated control and sensing paths. |
| Channel-Channel Skew | ≤2.5 ns - critical for synchronous multi-channel sampling in isolated ADC interfaces. |
| 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 | Low output during input-side power loss - prevents unintended activation of downstream MOSFET gates in power stages. |
| CMTI | ≥60 kV/µs - maintains signal integrity in high-dV/dt environments like IGBT switching nodes. |
Pinout & Package
SI8642BD-B-IS2R is housed in a RoHS-compliant wide-body SOIC-16 package (IS2 variant) with 8 mm creepage distance and standard land pattern compatibility. The IS2 design eliminates tie bars while retaining WB SOIC-16 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry for channels A1–A4; requires 0.1 µF bypass capacitor. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier. |
| A1–A4 | Input signal terminals | Accept CMOS/TTL signals; Schmitt-trigger inputs provide 440 mV hysteresis for noise rejection. |
| EN1 | Enable for A3/A4 outputs | Active-high control: drives A3/A4 into Hi-Z when low; internally pulled up to VDD1. |
| VDD2 | Output-side power supply | Supplies receiver and output driver circuitry for B1–B4; independent of VDD1. |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1. |
| B1–B4 | Isolated output terminals | Drive 50 Ω nominal impedance loads; support 4 mA sink/source at 0.4 V VOL / 4.8 V VOH (5 V). |
| EN2 | Enable for B1/B2 outputs | Active-high control: drives B1/B2 into Hi-Z when low; internally pulled up to VDD2. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; enables 60-year life at rated working voltage. |
| Dual independent enable inputs | EN1 controls A3/A4; EN2 controls B1/B2 - supports selective channel shutdown in multi-zone systems. |
| Fail-safe default-low output | Guarantees logic-low state on B1–B2 when VDD1 is unpowered - prevents false triggering in safety-critical power stages. |
| High CMTI (≥60 kV/µs) | Withstands fast transients in motor drive half-bridges and DC-DC converter switching nodes without data corruption. |
| Ultra-low power at 100 Mbps | 11 mA per side (5 V) - reduces thermal load in densely packed industrial PLC modules. |
Applications
| Motor Control Interface | Isolated ADC/DAC Link |
|---|---|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback between MCU and 3-phase inverter stage in servo drives. IC Role / Device Role / Timing Role: Bidirectional signal isolator with 2:2 channel split; provides timing-aligned, noise-immune transmission of gate commands and analog feedback. Use Value: Enables safe operation at 5 kVRMS working voltage while maintaining <2.5 ns channel skew for synchronized phase current sampling. | Use Scenario: Connecting isolated sigma-delta ADC outputs to host processor in medical infusion pump controllers. IC Role / Device Role / Timing Role: Digital isolator for serial bitstream (e.g., SCLK/SDATA) between isolated ADC and non-isolated controller. Use Value: Supports 150 Mbps data rate to handle oversampled 24-bit ADC streams without bottlenecking; Schmitt inputs reject EMI from nearby solenoid drivers. |
| Battery Management System | Industrial PLC I/O Module |
Use Scenario: Isolating cell voltage monitoring and balancing command signals between battery pack and master controller in EV packs. IC Role / Device Role / Timing Role: Fail-safe isolator with default-low outputs ensures open-circuit fault condition disables balancing FETs during communication loss. Use Value: Reinforced 5 kVRMS rating meets IEC 62368-1 requirements for high-voltage battery stacks; AEC-Q100 qualified for automotive deployment. | Use Scenario: Providing isolated digital input conditioning for 24 V DC field sensors in factory automation cabinets. IC Role / Device Role / Timing Role: Input-side isolator converting noisy 24 V sensor signals to clean 3.3 V logic levels for FPGA processing. Use Value: 1.23 V negative-going input threshold and 440 mV hysteresis reject common-mode noise on long cable runs in electrically harsh environments. |
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 direction, 25 kV/µs CMTI, 25 Mbps max, SOIC-16 WB, 2.5–5.5 V | Limited to 25 Mbps - unsuitable for high-speed SPI or encoder interfaces requiring >50 Mbps | Select when lower data rate and legacy ADI ecosystem integration are prioritized over speed and CMTI. |
| ISO6742FDWR | 4-channel, 2/2 direction, 50 kV/µs CMTI, 50 Mbps max, SOIC-16 WB, 1.71–5.5 V | Lower max data rate and CMTI vs. SI8642BD-B-IS2R; no selectable fail-safe mode | Choose for cost-sensitive industrial designs where 50 Mbps suffices and default output state is managed externally. |
Compared with ADUM2402BRWZ and ISO6742FDWR, SI8642BD-B-IS2R delivers 3× higher data rate (150 Mbps), 2.4× higher CMTI (≥60 kV/µs), and factory-configurable fail-safe behavior - making it optimal for next-generation EV BMS, servo drives, and high-density PLCs demanding timing precision and reinforced safety.
Availability
SI8642BD-B-IS2R is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and isolated data acquisition requiring stable component supply across extended temperature and high-reliability lifecycles.
Supply support for SI8642BD-B-IS2R 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 industrial and automotive isolation applications requiring reinforced safety certification, low power, and precise timing - targeting motor drives, energy storage, and automated test equipment.
FAQ
What is the isolation rating and safety certification status of SI8642BD-B-IS2R?
SI8642BD-B-IS2R provides 5 kVRMS reinforced isolation and is certified to UL 1577, CSA Component Notice 5A, VDE 0884-10 (basic insulation), IEC 60950-1, IEC 62368-1, IEC 60601-1, and CQC GB4943.1. Its IS2 package enables 8 mm creepage for high-voltage system compliance.
Does SI8642BD-B-IS2R support fail-safe operation, and how is it configured?
Yes, SI8642BD-B-IS2R has factory-configured fail-safe default-low output behavior. When VDD1 is unpowered but VDD2 remains active, outputs B1–B2 hold low - preventing unintended activation in power-stage control. This is fixed per ordering code and not user-programmable.
What are the enable pin functions on SI8642BD-B-IS2R, and how do they operate?
SI8642BD-B-IS2R has two independent enable pins: EN1 controls outputs A3/A4, and EN2 controls outputs B1/B2. When pulled low, each places its respective output pair into high-impedance state. Both are internally pulled up to their local VDD and require no external bias.
What is the maximum data rate and propagation delay specification for SI8642BD-B-IS2R?
SI8642BD-B-IS2R supports up to 150 Mbps data rate with a maximum propagation delay of 13 ns. Typical values are 8 ns, and channel-to-channel skew is guaranteed ≤2.5 ns - enabling precise synchronization in time-critical isolated control loops.
Is SI8642BD-B-IS2R qualified for automotive applications?
No, SI8642BD-B-IS2R is an industrial-grade part (suffix "-I"). Automotive-grade equivalents exist (e.g., SI8642BD-B-AS2), which include AEC-Q100 qualification, AIAG-compliant PPAP documentation, and IMDS/CAMDS material listings - but SI8642BD-B-IS2R itself is not automotive-qualified.
SI8642BD-B-IS2R 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:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 4ns, 4ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8642BD-B-IS2R FAQ
1.How can I place an order for SI8642BD-B-IS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642BD-B-IS2R 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 SI8642BD-B-IS2R reliable?
The price and inventory of SI8642BD-B-IS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642BD-B-IS2R is usually 5 days.
3.What payment methods are accepted for SI8642BD-B-IS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642BD-B-IS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642BD-B-IS2R?
SI8642BD-B-IS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642BD-B-IS2R 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 SI8642BD-B-IS2R?
For technical support, including SI8642BD-B-IS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642BD-B-IS2R requirements.
6.How does Aetrix verify that SI8642BD-B-IS2R is sourced from the original manufacturer or authorized distributors?
All SI8642BD-B-IS2R 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 SI8642BD-B-IS2R meets industry standards.
7.What is the process for return or replacement of SI8642BD-B-IS2R?
All SI8642BD-B-IS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8642BD-B-IS2R, 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 SI8642BD-B-IS2R part is unused and in its original packaging.
Return procedure for SI8642BD-B-IS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642BD-B-IS2R 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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