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Skyworks Solutions Inc. SI83402BCA-IF
- Part No.:
- SI83402BCA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83402BCA-IF.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:4,549
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Product details
Overview
SI83402BCA-IF from Skyworks Solutions is a 2-channel isolated high-side smart switch IC for industrial control, featuring galvanic CMOS isolation, 1.25 A continuous output per channel (78 mΩ RON), 9–32 V switch supply, and 2.25–5.5 V logic interface. It integrates overcurrent, overtemperature, undervoltage, and open-circuit protection with eight diagnostics reported via SPI or dedicated indicator pins - deployed in PLC I/O modules driving solenoids and relays.
For engineers reviewing the SI83402BCA-IF datasheet, SI83402BCA-IF pinout, SI83402BCA-IF application, or SI83402BCA-IF equivalent, key selection considerations include its dual-channel high-side sourcing configuration, absence of SPI interface (parallel-only control), presence of VDD2_WRN low-voltage warning pin, and lack of channel status LEDs - distinguishing it from SPI-capable or LED-equipped variants in the Si834x family.
Technical Context
The SI83402BCA-IF implements two independent high-side switch channels using RF-modulated CMOS isolation, each with dedicated isolation barriers for control and diagnostics. Its parallel-only interface uses dedicated input pins (A1/A2) and asynchronous OE enable, with no SPI bus or MOSI/MISO signals.
It features a multi-voltage smart output clamp enabling unlimited demagnetization energy handling (EAS) and fast turn-OFF for inductive loads, plus Inrush Current Mode disabled per ordering guide - unlike SI83404AAA-IF or SI83414AAA-IF. Fault reporting includes VDD2_WRN but excludes OPEN_CH and LEDn indicators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | 2-channel high-side sourcing switch (open-source configuration) |
| Continuous Output Current | 1.25 A per channel at 78 mΩ RON; requires PCB trace combining for full rating |
| Switch Supply Range | 9 V–32 V - compatible with standard industrial 24 V DC systems |
| Logic Supply Range | 2.25 V–5.5 V - supports direct interfacing with low-power MCUs and FPGAs |
| Isolation Rating | 1.5 kVRMS safety-rated isolation; >100 kV/µs CMTI for noise immunity in noisy factory environments |
| Diagnostic Outputs | VDD2_WRN active-low open-drain pin only; no FLT, LEDn, or OPEN_CH pins enabled |
| Interface Type | Parallel-only control (A1/A2 inputs + OE); no SPI interface or associated pins (MOSI/MISO/SCLK/NSS) |
Pinout & Package
SI83402BCA-IF is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad, optimized for high-density industrial PCB layouts and thermal dissipation in enclosed control cabinets.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Provides power to digital interface side (2.25–5.5 V); internal UVLO at ~2.05 V |
| OE | Asynchronous output enable | Active-high global enable; forces all outputs OFF when low, independent of A1/A2 states |
| GND1 | Logic ground reference | Reference for VDD1 and all logic-side pins; must be separated from GND2 by isolation barrier |
| A1, A2 | Channel control inputs | Direct parallel inputs for CH1 and CH2; high = ON (high-side sourcing), low = OFF |
| VDD2 | Switch supply input | Power for output stage (9–32 V); monitored for undervoltage warning (VDD2_WRN) |
| GND2 | Power ground reference | Reference for VDD2 and all output-side pins; galvanically isolated from GND1 |
| B1, B2 | High-side switch outputs | Source current to load; rated 1.25 A continuous; integrated clamp handles EAS during turn-OFF |
| VDD2_WRN | Switch supply warning indicator | Active-low open-drain output asserted when VDD2 drops below warning threshold (~18 V) |
| DNC, NC | No-connect terminals | Not internally connected; must be left unconnected or tied to GND2 per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic CMOS isolation | Replaces optocouplers with >100 kV/µs CMTI and 1.5 kVRMS rating - eliminates LED aging and improves long-term reliability |
| Smart multi-voltage output clamp | Enables unlimited EAS handling and fast inductor demagnetization without external snubbers or TVS diodes |
| Comprehensive fault protection | Integrated overcurrent, overtemperature, and undervoltage monitoring with automatic shutdown - no external sensing circuitry required |
| Parallel-only interface | Simplifies migration from legacy optocoupler-based designs; eliminates SPI firmware overhead and timing constraints |
| VDD2_WRN warning pin | Provides immediate system-level alert for marginal 24 V rail conditions before fault shutdown occurs |
Applications
| Programmable Logic Controller (PLC) Digital Output Module | Industrial Motion Controller I/O Stage |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in modular PLC backplanes with strict isolation and diagnostic requirements. IC Role / Device Role / Timing Role: High-side switch providing galvanically isolated 24 V output control with real-time VDD2 supply monitoring. Use Value: Eliminates need for discrete optocouplers and driver transistors while delivering built-in undervoltage warning (VDD2_WRN) to prevent erratic actuator behavior during brownout conditions. |
Use Scenario: Controlling brake coils and limit-switch indicators in servo-driven CNC axes where EMI immunity and fast turn-OFF are critical. IC Role / Device Role / Timing Role: Dual-channel high-side driver with smart clamp enabling sub-10 µs turn-OFF for precise motion sequencing. Use Value: Fast, controlled demagnetization reduces contact arcing in electromagnetic brakes - extending mechanical life and improving repeatability. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition System Output Stage |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted remote I/O units requiring silent, bounce-free switching and 10M+ cycle lifetime. IC Role / Device Role / Timing Role: Isolated solid-state switch delivering 1.25 A per channel with integrated thermal and overcurrent protection. Use Value: No moving parts or contact wear; built-in diagnostics reduce field failure root-cause analysis time versus generic SSRs lacking supply monitoring. |
Use Scenario: Providing isolated digital outputs in environmental monitoring gateways that interface with analog sensors and alarm actuators. IC Role / Device Role / Timing Role: Galvanically isolated output driver ensuring signal integrity between sensor domain and control domain. Use Value: 1.5 kVRMS isolation and >100 kV/µs CMTI prevent measurement corruption from motor drives or HVAC inverters sharing the same enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side smart switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83402BBA-IF | Lacks VDD2_WRN pin; no low-voltage warning indicator | Suitable where only basic ON/OFF control and fault shutdown are needed - no early warning capability | Select SI83402BBA-IF if VDD2 monitoring is handled upstream; choose SI83402BCA-IF when predictive rail health awareness is required. |
| SI83402BAA-IF | Includes LED1/LED2 status indicators; same VDD2_WRN functionality | Enables local visual status feedback on PCB without MCU polling - useful for commissioning and maintenance | Choose SI83402BAA-IF when field-service visibility matters; SI83402BCA-IF saves board space and BOM cost where LEDs are unnecessary. |
Compared with SI83402BBA-IF, SI83402BCA-IF adds VDD2_WRN for proactive power rail monitoring; compared with SI83402BAA-IF, it removes LED outputs to reduce pin count and simplify layout - making it optimal for space-constrained, cost-sensitive PLC modules needing supply health awareness without visual indicators.
Availability
SI83402BCA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relay replacements requiring stable component supply, long lifecycle support, and guaranteed traceability for industrial OEMs.
Supply support for SI83402BCA-IF 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 for infrastructure, automotive, and industrial markets.
The Si834x product line was designed specifically for industrial automation applications requiring robust galvanic isolation, integrated protection, and simplified migration from optocoupler-based architectures - with SI83402BCA-IF targeting cost-optimized, parallel-controlled PLC output stages.
FAQ
What is the maximum continuous output current per channel for SI83402BCA-IF?
The SI83402BCA-IF delivers 1.25 A continuous output current per channel at 78 mΩ RON. This rating assumes proper PCB trace width and thermal management per Skyworks' recommended layout in the datasheet. Derating applies above 85 °C ambient temperature, and the device enters thermal shutdown if junction temperature exceeds 150 °C.
Does SI83402BCA-IF support SPI communication?
No, SI83402BCA-IF does not support SPI communication. It is a parallel-only interface device with dedicated A1/A2 control inputs and OE enable pin. SPI functionality is present only in Si834x part numbers ending in "D", "F", or "A" with "SPI" or "Parallel/SPI" in the ordering guide - such as SI83402BDA-IF or SI83402BFA-IF.
What diagnostic indicators are available on SI83402BCA-IF?
SI83402BCA-IF provides only the VDD2_WRN active-low open-drain pin for switch supply voltage warning. It does not include FLT, LED1–LED4, or OPEN_CH pins. Diagnostic status beyond VDD2_WRN must be accessed via external MCU polling of the device's internal registers - though SI83402BCA-IF lacks SPI, so no register access is possible; diagnostics are limited to this single hardware indicator.
Is SI83402BCA-IF a high-side or low-side switch?
SI83402BCA-IF is configured as a high-side sourcing switch. Its B1 and B2 outputs source current from VDD2 to the load, with the load return path connected to GND2. This configuration enables direct drive of grounded loads like solenoids and lamps - matching the requirements of standard PLC digital output modules.
What isolation rating and transient immunity does SI83402BCA-IF provide?
SI83402BCA-IF provides 1.5 kVRMS safety-rated galvanic isolation across its CMOS barrier and >100 kV/µs common-mode transient immunity (CMTI). These specifications meet IEC 61131-2 requirements for industrial control equipment and ensure reliable operation in electrically noisy environments such as factory floors with variable-frequency drives and welding equipment.
SI83402BCA-IF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si834x
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Bidirectional, Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.5µs, 4.5µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 2µs, -
- Voltage - Supply:
- 2.25V ~ 5.5V, 9V ~ 32V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-DFN (9x9)
SI83402BCA-IF FAQ
1.How can I place an order for SI83402BCA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83402BCA-IF 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 SI83402BCA-IF reliable?
The price and inventory of SI83402BCA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83402BCA-IF is usually 5 days.
3.What payment methods are accepted for SI83402BCA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83402BCA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83402BCA-IF?
SI83402BCA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83402BCA-IF 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 SI83402BCA-IF?
For technical support, including SI83402BCA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83402BCA-IF requirements.
6.How does Aetrix verify that SI83402BCA-IF is sourced from the original manufacturer or authorized distributors?
All SI83402BCA-IF 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 SI83402BCA-IF meets industry standards.
7.What is the process for return or replacement of SI83402BCA-IF?
All SI83402BCA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83402BCA-IF, 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 SI83402BCA-IF part is unused and in its original packaging.
Return procedure for SI83402BCA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83402BCA-IF Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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