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Skyworks Solutions Inc. SI83411BCA-IFR
- Part No.:
- SI83411BCA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83411BCA-IFR.pdf
- Description:
- 1 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
SI83411BCA-IFR from Skyworks Solutions is a single-channel isolated low-side smart switch with 2.5 A continuous current capability, 155 mΩ RON, and 1.5 kVRMS galvanic isolation. It integrates overcurrent, overtemperature, undervoltage, and open-circuit protection, and delivers diagnostics via dedicated indicator pins - designed for driving solenoids, relays, and lamps in industrial PLC I/O modules.
For engineers reviewing the SI83411BCA-IFR datasheet, SI83411BCA-IFR pinout, SI83411BCA-IFR application, or SI83411BCA-IFR equivalent, key selection considerations include its parallel-only interface, absence of SPI, presence of VDD2_WRN and OPEN_CH indicator pins, and compatibility with 2.25–5.5 V logic supplies and 9–32 V load supplies in safety-critical industrial control designs.
Technical Context
The SI83411BCA-IFR implements a CMOS-based RF-isolated architecture with dedicated isolation channels per switch, enabling robust fault-tolerant operation without startup initialization. Its low-side configuration sinks current into GND2, and it uses a multi-voltage output clamp to handle unlimited demagnetization energy (EAS) while ensuring fast turn-OFF for inductive loads.
It supports only parallel input control with asynchronous OE enable and provides eight diagnostic reports-including VDD2 supply warning, open-channel detection, and fault status-exposed through active-low, open-drain pins (VDD2_WRN, OPEN_CH, FLT, LED1), independent of switch control timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Low-side switch (sinking configuration) |
| Continuous Current | 2.5 A - supports high-power solenoid and relay drivers without external heatsinking |
| RON | 155 mΩ - minimizes conduction loss and thermal rise at full load |
| Isolation Rating | 1.5 kVRMS - meets UL 1577, CSA 62368-1, and GB4943.1 safety requirements |
| Logic Supply Range | 2.25–5.5 V - interoperable with low-voltage MCUs including 2.5 V and 3.3 V systems |
| Switch Supply Range | 9–32 V - compatible with standard industrial 24 V DC power rails |
| CMTI | >100 kV/µs - ensures reliable operation in noisy factory environments with fast transients |
| Operating Temp | −40 to +125 °C - qualified for extended temperature range in enclosed control cabinets |
Pinout & Package
SI83411BCA-IFR is housed in a compact 9×9 mm DFN-32 package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers internal digital circuitry; accepts 2.25–5.5 V; UVLO threshold at ~2.1 V |
| OE | Asynchronous output enable | Active-high; disables all outputs immediately when pulled low, overriding channel inputs | GND1 | Logic ground reference | Reference for VDD1 and digital interface; isolated from GND2 by 1.5 kVRMS barrier |
| A1 | Channel input | Parallel logic input controlling B1 output; high = ON, low = OFF |
| B1 | Low-side switch output | Sinks up to 2.5 A to GND2; includes RON=155 mΩ and integrated EAS clamp |
| VDD2 | Switch supply input | Powers output stage; 9–32 V range; monitored for undervoltage warning (VDD2_WRN) |
| GND2 | Power ground reference | Return path for load current; isolated from GND1; connects to external load ground |
| VDD2_WRN | Open-drain warning indicator | Active-low signal asserted when VDD2 drops below warning threshold (~9 V) |
| OPEN_CH | Open-drain open-circuit indicator | Active-low when open-load condition detected on B1 (e.g., broken wire or disconnected solenoid) |
| FLT | Open-drain fault indicator | Active-low when any fault (overcurrent, overtemperature, undervoltage) is latched |
| LED1 | Open-drain channel status indicator | Active-low mirror of B1 output state - provides real-time visual feedback for operator panels |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | 1.5 kVRMS with >100 kV/µs CMTI - replaces optocouplers with superior lifetime and noise immunity |
| Multi-voltage output clamp | Unlimited EAS handling with fast demagnetization - eliminates need for external flyback diodes across inductive loads |
| Dedicated diagnostic indicators | VDD2_WRN, OPEN_CH, FLT, and LED1 pins provide immediate hardware-level visibility without SPI polling |
| Inrush current support | No inrush mode enabled - optimized for stable resistive/inductive loads without lamp surge requirements |
| Protection suite | Integrated overcurrent, overtemperature, undervoltage, and open-circuit detection - reduces system-level monitoring complexity |
| Industrial compliance | IEC 61131-2 compliant - certified for use in programmable controller output modules and safety-related subsystems |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and relay coils in modular PLC backplanes with strict isolation and diagnostic requirements. IC Role / Device Role / Timing Role: Low-side smart switch providing isolated, protected, and monitored load control per channel. Use Value: Eliminates discrete protection components and optocouplers, reducing BOM count and improving MTBF in harsh factory environments. | Use Scenario: Conditioning and isolating digital output signals from DAQ controllers to field actuators in test benches and process monitoring stations. IC Role / Device Role / Timing Role: Galvanically isolated interface between low-voltage controller logic and higher-voltage field-side loads. Use Value: Enables safe, real-time status reporting (via LED1 and FLT) without software overhead - critical for deterministic response in closed-loop systems. |
| Motion Controller I/O Expansion | Smart Solid-State Relay Replacement |
Use Scenario: Adding isolated digital outputs to servo drive I/O expansion cards for brake control, limit switches, and auxiliary signaling. IC Role / Device Role / Timing Role: Single-channel isolated driver with fast 10 µs update rate and hardware fault signaling. Use Value: Supports sub-millisecond actuation timing while delivering VDD2_WRN and OPEN_CH alerts to prevent motion faults due to power or wiring issues. | Use Scenario: Replacing electromechanical relays in panel-mounted solid-state relay modules requiring long life and silent operation. IC Role / Device Role / Timing Role: Semiconductor-based low-side switch with built-in EAS clamp and thermal shutdown. Use Value: Achieves >100 million cycles versus mechanical relay wear-out, with no contact arcing and zero maintenance in HVAC or packaging equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated low-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83411BAA-IFR | Same 1-channel low-side topology but includes LED1 and VDD2_WRN indicators; lacks OPEN_CH pin | Used where open-load detection is not required but basic supply warning and channel status are sufficient | Select SI83411BAA-IFR if OPEN_CH diagnostics are unnecessary and cost optimization is prioritized |
| SI83411BBA-IFR | Same package and specs but omits VDD2_WRN and LED1; retains OPEN_CH and FLT only | Targeted at space-constrained designs needing minimal indicator pins and maximum pin flexibility | Choose SI83411BBA-IFR when board layout requires fewer dedicated indicator traces and diagnostics are handled externally |
Compared with SI83411BAA-IFR and SI83411BBA-IFR, the SI83411BCA-IFR uniquely provides all three diagnostic indicators (VDD2_WRN, OPEN_CH, LED1) plus FLT in a parallel-only interface, making it optimal for applications demanding full hardware-level visibility without SPI firmware integration.
Availability
SI83411BCA-IFR is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controller I/O expansion, and smart solid-state relay modules requiring stable component supply, long-term lifecycle assurance, and safety-certified isolation.
Supply support for SI83411BCA-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, isolation, and precision timing technologies.
The Si834x product line was engineered specifically for industrial automation, delivering integrated isolation, protection, and diagnostics in a single IC to replace legacy optocoupler-plus-driver designs in PLC and motion control systems.
FAQ
What is the isolation voltage rating of the SI83411BCA-IFR?
The SI83411BCA-IFR features 1.5 kVRMS galvanic isolation rated per UL 1577, CSA 62368-1, and GB4943.1 standards. This isolation barrier separates the logic side (VDD1/GND1) from the power side (VDD2/GND2/B1), enabling safe interfacing between low-voltage microcontrollers and 24 V industrial loads without additional isolation components. The SI83411BCA-IFR achieves this using Skyworks' proprietary CMOS-based RF isolation technology.
Does the SI83411BCA-IFR support SPI communication?
No, the SI83411BCA-IFR does not support SPI communication. It is a parallel-only interface device with dedicated input (A1) and output enable (OE) pins. Diagnostics are reported exclusively through hardware indicator pins - VDD2_WRN, OPEN_CH, FLT, and LED1 - eliminating the need for firmware-driven register access. For SPI-capable variants, consider SI83415BDA-IFR or SI83415BFA-IFR instead of the SI83411BCA-IFR.
What load types can the SI83411BCA-IFR safely drive?
The SI83411BCA-IFR is qualified to drive resistive and inductive loads up to 2.5 A continuous, including solenoids, relays, and lamps commonly used in industrial control. Its integrated multi-voltage output clamp handles unlimited demagnetization energy (EAS), making it suitable for inductive loads without external flyback diodes. It does not support inrush current mode (unlike SI83411BAA-IFR), so lamp-driving applications requiring 8 A surge should use alternative variants.
How does the OPEN_CH pin function on the SI83411BCA-IFR?
The OPEN_CH pin on the SI83411BCA-IFR is an active-low, open-drain indicator that asserts when an open-circuit condition is detected on the B1 output - such as a broken wire, disconnected solenoid, or failed load connection. It operates independently of the OE pin and remains asserted until the load is reconnected and the fault is cleared. This hardware-level alert enables immediate field-service response without requiring SPI polling or MCU intervention, enhancing reliability in the SI83411BCA-IFR's target applications.
What is the operating temperature range for the SI83411BCA-IFR?
The SI83411BCA-IFR is specified for operation from −40 °C to +125 °C ambient temperature, fully qualified across this range per AEC-Q100 stress testing methodology. This extended temperature capability ensures reliable performance in enclosed industrial cabinets, motor control enclosures, and outdoor automation equipment where thermal management is constrained. The SI83411BCA-IFR's overtemperature protection activates before junction limits are exceeded, safeguarding both the IC and connected loads.
SI83411BCA-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:
- Bidirectional, Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.7µs, 3.7µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -, 3µs
- 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)
SI83411BCA-IFR FAQ
1.How can I place an order for SI83411BCA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83411BCA-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 SI83411BCA-IFR reliable?
The price and inventory of SI83411BCA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83411BCA-IFR is usually 5 days.
3.What payment methods are accepted for SI83411BCA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83411BCA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83411BCA-IFR?
SI83411BCA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83411BCA-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 SI83411BCA-IFR?
For technical support, including SI83411BCA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83411BCA-IFR requirements.
6.How does Aetrix verify that SI83411BCA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83411BCA-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 SI83411BCA-IFR meets industry standards.
7.What is the process for return or replacement of SI83411BCA-IFR?
All SI83411BCA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83411BCA-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 SI83411BCA-IFR part is unused and in its original packaging.
Return procedure for SI83411BCA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83411BCA-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
-
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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