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Skyworks Solutions Inc. SI83401BCA-IFR
- Part No.:
- SI83401BCA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83401BCA-IFR.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
SI83401BCA-IFR from Skyworks Solutions is a single-channel isolated high-side smart switch with 2.5 A continuous current capability, 155 mΩ RON, and 1.5 kVRMS safety-rated isolation. It integrates galvanic isolation, inrush current mode (8 A/20 ms), overcurrent/overtemperature/undervoltage protection, and open-circuit detection - designed for driving industrial solenoids and relays in PLC output modules.
For engineers reviewing the SI83401BCA-IFR datasheet, SI83401BCA-IFR pinout, SI83401BCA-IFR application, or SI83401BCA-IFR equivalent, key selection considerations include its parallel-only control interface, dedicated VDD2_WRN warning indicator, absence of SPI, and support for 9–32 V switch supply with 2.25–5.5 V logic supply in a compact DFN-32 package.
Technical Context
The SI83401BCA-IFR implements a CMOS-based RF-isolated high-side switch architecture with independent isolation channels per function: parallel input control, fault reporting, and supply monitoring. Its analog front-end includes precision voltage, current, and temperature sensors feeding a real-time protection engine that enforces current limiting, thermal derating, and controlled shutdown.
It features a multi-voltage smart output clamp enabling unlimited EAS handling and fast inductor demagnetization, while its truth table behavior (Table 4) defines fault persistence via FLT_CLR pin and supports asynchronous OE-driven switching with VDD2_WRN active-low warning indication - all without SPI dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | High-side sourcing switch - directly drives loads between VDD2 and B1 output terminal. |
| Continuous Current | 2.5 A - supports industrial solenoids and relays without external heatsinking at 125°C ambient. |
| RON | 155 mΩ - minimizes conduction loss and self-heating under full load. |
| Isolation Rating | 1.5 kVRMS - certified to UL 1577 (1 min), CSA 62368-1, and GB4943.1 for functional safety in PLCs. |
| Supply Ranges | VDD1: 2.25–5.5 V; VDD2: 9–32 V - enables direct interfacing with low-power MCUs and wide-range industrial power rails. |
| Inrush Mode | 8 A for 20 ms - sustains lamp filament preheat or relay coil pull-in without tripping overcurrent protection. |
| CMTI | >100 kV/µs - ensures robust operation in noisy factory environments with fast-switching motor drives. |
Pinout & Package
SI83401BCA-IFR uses a 9×9 mm DFN-32 package with exposed thermal pad (EP) on underside for enhanced heat dissipation. Pin numbering follows standard DFN convention (top view, counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface; accepts 2.25–5.5 V; internal UVLO at ~2.1 V. |
| OE | Asynchronous output enable | Active-high; overrides channel control - pulls B1 low when OE = L. | GND1 | Logic ground | Reference for VDD1 and digital inputs; isolated from GND2 by 1.5 kVRMS barrier. |
| A1 | Parallel input | Direct logic-level control of B1 output; high = ON, low = OFF. |
| B1 | High-side switch output | Sourcing output terminal; connects to load anode; rated 2.5 A continuous. |
| VDD2 | Switch supply input | Powers output stage; 9–32 V range; monitored for undervoltage warning (VDD2_WRN). |
| GND2 | Power ground | Return path for VDD2 and B1 load current; isolated from GND1. |
| VDD2_WRN | Active-low warning indicator | Open-drain output asserted when VDD2 drops below warning threshold (~9 V); requires external pull-up. |
| FLT | Active-low fault indicator | Open-drain output asserted during any detected fault (overcurrent, overtemp, open load, etc.). |
| LED1 | Channel status indicator | Open-drain, active-low output reflecting B1 ON/OFF state; driven independently of FLT. |
| FLT_CLR | Fault clear input | Active-high signal to reset latched fault conditions after fault removal. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-voltage smart clamp | Handles unlimited demagnetization energy (EAS) while achieving fast turn-OFF - eliminates need for external snubbers in inductive load circuits. |
| Inrush Current Mode | Delivers 8 A peak for 20 ms to reliably energize cold lamp filaments or relay coils without triggering overcurrent shutdown. |
| Dedicated VDD2_WRN pin | Provides immediate, hardware-level warning of marginal switch supply voltage - enables system-level brownout response before fault occurs. |
| Open-circuit detection | Reports broken-wire or disconnected load conditions via diagnostic registers and LED1/FLT indicators - critical for predictive maintenance in PLC I/O modules. |
| Asynchronous OE control | Allows hardware-level emergency shutdown of B1 independent of A1 logic state - supports safety interlocks and fail-safe system design. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Solenoid Driver |
|---|---|
Use Scenario: Mounted on DIN-rail I/O cards to drive 24 V DC solenoid valves in factory automation lines. IC Role / Device Role / Timing Role: High-side switch providing isolated, protected, and monitored load control with 10 µs update rate. Use Value: Eliminates discrete optocoupler + MOSFET + protection IC combinations, reducing BOM count and PCB area while adding diagnostics. | Use Scenario: Embedded in hydraulic control manifolds to actuate pilot-stage solenoids requiring precise timing and fault resilience. IC Role / Device Role / Timing Role: Single-channel isolated driver delivering 2.5 A with inrush mode for reliable valve pull-in under cold-start conditions. Use Value: Prevents nuisance tripping during solenoid energization and reports open-circuit faults before process interruption occurs. |
| Smart Solid-State Relay Replacement | Machine Safety Interlock Interface |
Use Scenario: Replacing electromechanical relays in CNC machine tool I/O subsystems where contact wear and bounce are unacceptable. IC Role / Device Role / Timing Role: Solid-state high-side switch with galvanic isolation and built-in overtemperature derating. Use Value: Enables >10 million operations lifetime, zero contact arcing, and real-time thermal margin monitoring vs. mechanical relay wear-out. | Use Scenario: Connecting light curtains and emergency stop circuits to controller safety inputs requiring monitored, fault-tolerant drive capability. IC Role / Device Role / Timing Role: Isolated output driver with FLT_CLR and OE pins supporting Category 3 / SIL 2 functional safety architectures. Use Value: Provides hardware-enforced fault reset and asynchronous disable - satisfies ISO 13849-1 PL e and IEC 62061 SIL 2 requirements. |
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 |
|---|---|---|---|
| SI83401BAA-IFR | Lacks VDD2_WRN pin; no low-voltage warning indicator. | Used where only basic ON/OFF control and fault reporting are required - no supply health monitoring needed. | Select SI83401BAA-IFR if VDD2_WRN functionality is unnecessary and cost optimization is prioritized. |
| SI83401BCA-IF | Same functionality but in cut-tape (non-reel) packaging; identical electrical specs and pinout. | Preferred for prototyping or low-volume production where tape-and-reel handling is not required. | Choose SI83401BCA-IF for evaluation or small-batch builds; SI83401BCA-IFR is optimized for automated SMT assembly. |
Compared with SI83401BAA-IFR, SI83401BCA-IFR adds VDD2_WRN for proactive supply monitoring, while SI83401BCA-IF offers identical performance in non-reel form - making SI83401BCA-IFR the optimal choice for volume production of safety-critical industrial outputs requiring both warning and fault signaling.
Availability
SI83401BCA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial solenoid drivers, and smart solid-state relay replacements requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SI83401BCA-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 for infrastructure, automotive, and industrial markets.
The Si834x product line delivers isolated smart switches for industrial control systems, combining galvanic isolation, comprehensive protection, and rich diagnostics to replace legacy optocoupler-plus-driver designs in PLCs and motion controllers.
FAQ
What is the maximum continuous output current rating for SI83401BCA-IFR?
The SI83401BCA-IFR is rated for 2.5 A continuous output current at TA = 125°C with proper PCB thermal design. This rating applies to its single high-side switch (B1) under 9–32 V VDD2 supply and accounts for internal RON of 155 mΩ and integrated thermal protection. Derating is required above 85°C ambient per the thermal characteristics in the datasheet.
Does SI83401BCA-IFR support SPI communication?
No, SI83401BCA-IFR does not support SPI communication. It belongs to the "Parallel-only" interface variant (per Table 1 ordering guide), offering dedicated A1/B1 control plus hardware indicators (VDD2_WRN, FLT, LED1, FLT_CLR). For SPI-capable variants, consider SI83405BDA-IFR or SI83405BFA-IFR - but those lack the VDD2_WRN pin present on SI83401BCA-IFR.
What is the purpose of the VDD2_WRN pin on SI83401BCA-IFR?
The VDD2_WRN pin on SI83401BCA-IFR is an active-low, open-drain indicator that asserts when the switch supply voltage (VDD2) falls below a warning threshold (~9 V). It provides early hardware-level notification of marginal VDD2 conditions before undervoltage lockout or fault shutdown occurs - enabling system-level brownout mitigation in PLC output stages.
How does the inrush current mode function on SI83401BCA-IFR?
SI83401BCA-IFR's inrush current mode delivers up to 8 A for 20 ms upon channel turn-on to handle cold lamp filaments or relay coils with high inrush demands. This mode is enabled by default and automatically disables once steady-state current drops below threshold - preventing false overcurrent trips while ensuring reliable actuation under worst-case load conditions.
What safety certifications apply to SI83401BCA-IFR?
SI83401BCA-IFR carries pending safety approvals including UL 1577 recognition (1500 VRMS/1 min), 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 programmable controllers, making it suitable for use in safety-related PLC output modules.
SI83401BCA-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:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- 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)
SI83401BCA-IFR FAQ
1.How can I place an order for SI83401BCA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83401BCA-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 SI83401BCA-IFR reliable?
The price and inventory of SI83401BCA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83401BCA-IFR is usually 5 days.
3.What payment methods are accepted for SI83401BCA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83401BCA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83401BCA-IFR?
SI83401BCA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83401BCA-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 SI83401BCA-IFR?
For technical support, including SI83401BCA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83401BCA-IFR requirements.
6.How does Aetrix verify that SI83401BCA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83401BCA-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 SI83401BCA-IFR meets industry standards.
7.What is the process for return or replacement of SI83401BCA-IFR?
All SI83401BCA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83401BCA-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 SI83401BCA-IFR part is unused and in its original packaging.
Return procedure for SI83401BCA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83401BCA-IFR 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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