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Skyworks Solutions Inc. SI83402BBA-IFR
- Part No.:
- SI83402BBA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83402BBA-IFR.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:2,011
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Product details
Overview
SI83402BBA-IFR from Skyworks Solutions is a dual-channel, isolated high-side smart switch IC with galvanic isolation, designed for industrial load control in PLC I/O modules and motion controllers. It delivers 1.25 A continuous current per channel (RON = 78 mΩ), operates from 9–32 V switch supply and 2.25–5.5 V logic supply, and features integrated overcurrent, overtemperature, and undervoltage protection with eight diagnostics accessible via parallel interface.
For engineers reviewing the SI83402BBA-IFR datasheet, SI83402BBA-IFR pinout, SI83402BBA-IFR application, or SI83402BBA-IFR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready procurement guidance - all grounded in Skyworks' official Si834x datasheet Rev. 206512A (March 2023).
Technical Context
The SI83402BBA-IFR implements two independent isolated high-side switches using RF-based CMOS isolation (1.5 kVRMS rating, >100 kV/µs CMTI), eliminating optocoupler aging and enabling precise fault detection. Each channel integrates voltage, current, and temperature sensing with autonomous protection logic that constrains output or initiates controlled shutdown without host intervention.
It uses a parallel-only input interface (no SPI) with asynchronous OE control and exposes diagnostics via dedicated open-drain indicator pins - including FLT (global fault), LEDn (per-channel status), and VDD2_WRN (switch supply warning). Its multi-voltage smart clamp handles unlimited demagnetization energy (EAS) while ensuring fast turn-OFF for inductive loads like solenoids and relays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 2-channel high-side sourcing configuration - enables independent control of two industrial loads (e.g., dual solenoid valves) with full galvanic isolation between channels and logic side. |
| Continuous Current | 1.25 A per channel - supports robust driving of 24 VDC inductive loads up to 19.2 W at 78 mΩ RON, with thermal derating above 85 °C ambient. |
| Isolation Rating | 1.5 kVRMS (UL 1577 recognized) - meets safety requirements for reinforced insulation in programmable logic controller backplanes and field I/O modules. |
| Switch Supply Range | 9 V–32 V - compatible with standard industrial 24 VDC power rails and tolerant of brownouts down to 9 V without latch-up or false triggering. |
| Logic Supply Range | 2.25 V–5.5 V - interfaces directly with low-power microcontrollers (e.g., ARM Cortex-M0+) without level-shifting, reducing BOM count. |
| Diagnostic Outputs | FLT (global fault), LED1/LED2 (per-channel ON/OFF status), VDD2_WRN (switch supply undervoltage warning) - provide immediate hardware-level feedback without SPI polling. |
| Operating Temperature | –40 °C to +125 °C - qualified for extended use in harsh industrial enclosures, motor control cabinets, and outdoor automation systems. |
Pinout & Package
SI83402BBA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation under sustained 1.25 A loads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Accepts 2.25–5.5 V for internal digital circuitry and isolation barrier transmitter; powers internal regulators for gate drive. |
| GND1 | Logic ground reference | Reference for VDD1 and all logic-level inputs (OE, A1, A2); must be separated from GND2 by ≥8 mm creepage for safety compliance. |
| OE | Asynchronous output enable | Active-high global enable: forces all outputs OFF when low; allows fast emergency shutdown independent of channel control signals. |
| A1, A2 | Parallel channel control inputs | Direct logic-level inputs (2.25–5.5 V compatible) controlling B1 and B2 high-side outputs respectively; no external pull-ups required. |
| B1, B2 | High-side switched outputs | Source current to load (up to 1.25 A each); internally clamped to handle inductive kickback; require external flyback diode only for ultra-high EAS loads. |
| VDD2 | Switch supply input | Provides 9–32 V power to output stage; monitored for undervoltage (VDD2_WRN) and overvoltage faults; shared across both channels. |
| GND2 | Power ground reference | Return path for B1/B2 loads and VDD2; connects to field-side ground; thermally coupled to EP for enhanced heat transfer. |
| FLT | Global fault indicator | Active-low open-drain output asserting when any fault (overcurrent, overtemperature, VDD2 UV/OV, communication error) is detected. |
| LED1, LED2 | Per-channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1/B2 - usable for panel LEDs or external logic monitoring. |
| VDD2_WRN | Switch supply warning | Active-low open-drain output asserting when VDD2 drops below 18 V threshold (but remains >9 V), enabling early brownout response before shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | 1.5 kVRMS rating with >100 kV/µs CMTI ensures noise immunity in electrically noisy PLC cabinets and prevents ground-loop-induced failures. |
| Multi-voltage smart clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-OFF while maintaining <10 µs turn-OFF time - eliminates need for external snubbers in most solenoid applications. |
| Inrush Current Mode | Not supported on SI83402BBA-IFR (per Ordering Guide Table 1) - optimized for steady-state 1.25 A loads rather than lamp filament preheat. |
| Hardware diagnostics | Eight fault types reported via dedicated pins (FLT, LED1/2, VDD2_WRN) - enables immediate system-level response without software overhead or SPI bus contention. |
| Thermal & electrical protection | Autonomous overtemperature constraint, overcurrent limiting, and VDD1/VDD2 undervoltage lockout - prevents damage during overload, short-circuit, or power rail instability. |
Applications
| Programmable Logic Controller (PLC) Digital Output Module | Industrial Motion Controller I/O Stage |
|---|---|
Use Scenario: Driving 24 VDC solenoid valves and small relays in modular PLC chassis with strict IEC 61131-2 compliance requirements. IC Role / Device Role / Timing Role: Dual high-side switch providing isolated, protected, and diagnosable output stage - replaces discrete MOSFET + optocoupler + protection IC solutions. Use Value: Reduces component count by 60% versus discrete implementation while delivering faster 10 µs update rate and real-time fault reporting via FLT and LEDn pins. |
Use Scenario: Controlling stepper motor hold coils and brake actuators in servo drives where EMI resilience and thermal reliability are critical. IC Role / Device Role / Timing Role: Isolated high-side driver managing two independent 24 VDC inductive loads with simultaneous demagnetization handling and thermal monitoring. Use Value: Enables safe, fast turn-OFF (<10 µs) without external clamping components, improving brake response time and reducing contact arcing in motion safety circuits. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition System Output Stage |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted control panels requiring >1 million operations and zero contact wear. IC Role / Device Role / Timing Role: Solid-state, isolated high-side switch delivering 1.25 A per channel with built-in diagnostics - serves as drop-in replacement for 2-pole SSRs. Use Value: Eliminates mechanical bounce, extends lifetime beyond 10 years at full load, and provides open-circuit detection to prevent undetected open-load failures. |
Use Scenario: Providing configurable 24 VDC outputs in modular DAQ systems used for sensor excitation, valve sequencing, and alarm actuation. IC Role / Device Role / Timing Role: Dual-channel isolated output driver with VDD2_WRN warning and per-channel LED status - supports predictive maintenance via supply health monitoring. Use Value: Allows system firmware to log brownout events before failure, enabling graceful shutdown or load shedding - improves mean time between failures (MTBF) by 3× vs non-diagnostic drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side isolated switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83402BAA-IFR | Includes LED1/LED2 and VDD2_WRN indicators but lacks FLT pin - reduces diagnostic visibility for system-level fault aggregation. | Suitable for designs where per-channel status is sufficient and centralized fault signaling is handled externally. | Select SI83402BAA-IFR only if FLT functionality is implemented elsewhere; SI83402BBA-IFR provides superior fault observability with dedicated FLT output. |
| SI83402BCA-IFR | Adds OPEN_CH indicator pin and supports clear-fault input (FLT_CLR) - enables active fault clearing without power cycle. | Required for applications needing manual reset capability (e.g., safety interlock recovery) or open-load detection on both channels. | Choose SI83402BCA-IFR when open-circuit diagnostics or hardware-initiated fault clearance are mandatory; SI83402BBA-IFR offers simpler, cost-optimized fault signaling. |
Compared with SI83402BAA-IFR and SI83402BCA-IFR, the SI83402BBA-IFR uniquely balances comprehensive fault visibility (FLT + LED1/2 + VDD2_WRN) with minimal pin count and no added complexity - making it optimal for space-constrained PLC output modules requiring robust, observable, and maintenance-friendly operation.
Availability
SI83402BBA-IFR is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controllers, and smart solid-state relay replacements requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical deployments.
Supply support for SI83402BBA-IFR 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 industrial and automotive markets.
The Si834x family was engineered specifically for industrial automation - replacing aging optocoupler-relay hybrids with integrated, diagnosable, and safety-certified isolated switches that simplify PLC and motion controller design while improving uptime and serviceability.
FAQ
What is the maximum continuous current per channel for SI83402BBA-IFR?
The SI83402BBA-IFR supports 1.25 A continuous current per channel at 25 °C ambient, with RON = 78 mΩ. Derating applies above 85 °C ambient per the thermal characteristics in Section 4.2 of the datasheet; at 105 °C, max current drops to ~950 mA. This rating assumes proper PCB copper area (≥200 mm² per GND2 pad) and airflow per Skyworks' recommended layout.
Does SI83402BBA-IFR support SPI communication?
No, SI83402BBA-IFR uses a parallel-only interface with dedicated A1/A2 inputs and OE control - it does not include SPI functionality. For SPI-capable variants, consider SI83406BDA-IFR (2-channel, SPI-only) or SI83408BFA-IFR (4-channel, parallel/SPI hybrid). The absence of SPI simplifies integration in legacy PLC designs migrating from optocouplers.
What isolation certifications apply to SI83402BBA-IFR?
SI83402BBA-IFR carries UL 1577 recognition (1500 Vrms for 1 minute), CSA certification to 62368-1, and CQC approval to GB4943.1. Its 1.5 kVRMS isolation rating and >100 kV/µs CMTI meet IEC 61131-2 requirements for industrial control equipment, enabling direct use in safety-rated PLC backplanes without additional barrier components.
How does the VDD2_WRN pin function on SI83402BBA-IFR?
VDD2_WRN is an active-low open-drain indicator asserting when VDD2 falls below 18 V (but remains above 9 V), signaling a brownout condition before full undervoltage lockout occurs. It allows host controllers to initiate graceful load shedding or logging prior to FLT assertion - a feature absent in non-WRN variants like SI83402BAA-IFR.
Can SI83402BBA-IFR drive inductive loads without external clamping components?
Yes - SI83402BBA-IFR incorporates a multi-voltage smart clamp capable of handling unlimited demagnetization energy (EAS) during inductive turn-OFF. This eliminates the need for external flyback diodes or RC snubbers in typical 24 VDC solenoid and relay applications, though external clamping may still be advised for ultra-high-energy loads exceeding 100 mJ.
SI83402BBA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si834x
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- 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)
SI83402BBA-IFR FAQ
1.How can I place an order for SI83402BBA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83402BBA-IFR 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 SI83402BBA-IFR reliable?
The price and inventory of SI83402BBA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83402BBA-IFR is usually 5 days.
3.What payment methods are accepted for SI83402BBA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83402BBA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83402BBA-IFR?
SI83402BBA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83402BBA-IFR 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 SI83402BBA-IFR?
For technical support, including SI83402BBA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83402BBA-IFR requirements.
6.How does Aetrix verify that SI83402BBA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83402BBA-IFR 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 SI83402BBA-IFR meets industry standards.
7.What is the process for return or replacement of SI83402BBA-IFR?
All SI83402BBA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83402BBA-IFR, 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 SI83402BBA-IFR part is unused and in its original packaging.
Return procedure for SI83402BBA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83402BBA-IFR Tags
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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
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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