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Skyworks Solutions Inc. SI83411BCA-IF
- Part No.:
- SI83411BCA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83411BCA-IF.pdf
- Description:
- 1 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:2,873
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Product details
Overview
SI83411BCA-IF from Skyworks Solutions is a single-channel isolated low-side smart switch with 1.5 kVRMS galvanic isolation, 2.5 A continuous output current (RON = 41 mΩ), and parallel logic interface. It integrates overcurrent, overtemperature, undervoltage, and open-circuit protection, and delivers diagnostics via dedicated indicator pins - designed for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83411BCA-IF datasheet, SI83411BCA-IF pinout, SI83411BCA-IF application, or SI83411BCA-IF equivalent, this page provides verified specifications, channel-level fault behavior, isolation barrier timing, diagnostic pin mapping, and direct alternatives for high-reliability industrial switching designs.
Technical Context
The SI83411BCA-IF implements a CMOS-based RF-isolated architecture with dedicated bidirectional isolation channels per switch, enabling robust operation without startup initialization. Its low-side configuration sinks load current through an integrated MOSFET with active clamp for unlimited EAS handling and fast turn-OFF.
Logic-side supply operates from 2.25 V–5.5 V to interface directly with low-power MCUs, while the switch-side supply supports 9 V–32 V industrial rails. Diagnostics-including VDD2 warning, open-channel detection, and fault latching-are exposed on active-low open-drain pins (VDD2_WRN, OPEN_CH, FLT) without requiring SPI communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1.5 kVRMS for 1 minute (UL 1577 recognized); enables safe separation between logic and 24 VDC industrial power domains. |
| Output Configuration | Low-side switch (sinking); connects load to GND2 when enabled, compatible with common-anode industrial I/O architectures. |
| Continuous Current | 2.5 A at TJ ≤ 125 °C; supports high-power solenoids and relay coils without external heatsinking in typical PLC chassis environments. |
| RON | 41 mΩ max at VDD2 = 24 V, TJ = 25 °C; minimizes conduction loss (<62 mW at 2.5 A) and thermal stress during sustained operation. |
| Logic Supply Range | 2.25 V–5.5 V; interoperable with 3.3 V and 5 V microcontrollers without level-shifting circuitry. |
| Switch Supply Range | 9 V–32 V; covers standard 24 VDC industrial control rails with margin for transients and brownouts. |
| CMTI | >100 kV/µs; maintains signal integrity across isolation barrier during fast-switching noise events in motor drive or power supply proximity. |
Pinout & Package
SI83411BCA-IF is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), rated for -40 °C to +125 °C ambient operation and optimized for automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic-side supply | Provides power to digital interface and isolation transmitter; must be ≥2.25 V for valid operation. |
| GND1 | Logic-side ground | Reference for VDD1 and all logic inputs; requires low-impedance connection to MCU ground plane. |
| OE | Output enable | Active-high asynchronous control; disables all outputs immediately when pulled low, independent of input state. |
| A1 | Channel 1 logic input | Parallel control signal for B1 output; high = ON (sink enabled), low = OFF (high-Z sink disabled). |
| B1 | Channel 1 output | Low-side switched output terminal; connects to load cathode or relay coil return path. |
| GND2 | Switch-side ground | Return path for load current; electrically isolated from GND1; must connect to industrial 0 V rail. |
| VDD2 | Switch-side supply | Power source for output stage; supplies energy to drive loads up to 32 V; monitored for UVLO and warning. |
| VDD2_WRN | Switch supply warning | Active-low open-drain indicator; asserts when VDD2 drops below 18 V but remains above 9 V - signals marginal rail condition. |
| OPEN_CH | Open-channel indicator | Active-low open-drain output; asserts when no load is detected on B1 (open-circuit condition). |
| FLT | Fault indicator | Active-low open-drain latched fault flag; asserts on overtemperature, overcurrent, or VDD2 undervoltage; cleared only by power cycle or FLT_CLR if present (not implemented in SI83411BCA-IF). |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation barrier | CMOS-based RF isolation delivering 1.5 kVRMS rating and >100 kV/µs CMTI - eliminates optocoupler aging and improves long-term reliability in harsh EMI environments. |
| Multi-voltage output clamp | Smart clamp architecture handles unlimited demagnetization energy (EAS) during inductive turn-OFF, reducing arcing and enabling faster switching than passive snubbers. |
| Inrush current mode | Not supported in SI83411BCA-IF (per Table 1: "No" under Inrush Current Mode column); optimized for steady-state 2.5 A loads rather than lamp filament preheat. |
| Dedicated diagnostic pins | VDD2_WRN, OPEN_CH, and FLT provide immediate hardware-level visibility into supply health, load continuity, and fault status - eliminating need for SPI polling in basic monitoring applications. |
| Asynchronous output disable | OE pin forces immediate shutdown of B1 regardless of A1 state or internal fault conditions - critical for emergency stop (E-stop) integration in safety-critical systems. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Controller I/O |
|---|---|
|
Use Scenario: Driving 24 VDC solenoid valves and contactor coils in modular PLC backplanes with strict isolation and diagnostic requirements. IC Role / Device Role / Timing Role: Low-side switch providing galvanically isolated, current-limited, and fault-monitored output stage for discrete actuator control. Use Value: Replaces optocoupler + discrete MOSFET + protection IC solutions with single-chip integration, reducing BOM count by 3+ components and improving MTBF. |
Use Scenario: Controlling brake release coils and position-hold solenoids in servo-driven motion systems where rapid fault response is mandatory. IC Role / Device Role / Timing Role: Isolated output driver with sub-10 µs propagation delay and hardware fault signaling for deterministic safety interlock timing. Use Value: Enables <100 µs total fault-to-shutdown latency via FLT pin assertion, meeting SIL-2 functional safety response time targets without software intervention. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition System Output Stage |
|
Use Scenario: Upgrading electromechanical relays in DIN-rail mounted control panels to solid-state equivalents with built-in diagnostics. IC Role / Device Role / Timing Role: Single-channel isolated switch replacing SPST relay contacts, with real-time open-load detection and supply monitoring. Use Value: Eliminates mechanical wear-out failure mode and provides predictive maintenance data (e.g., OPEN_CH assertion before complete coil failure). |
Use Scenario: Providing programmable digital outputs in modular DAQ chassis that interface with legacy 24 VDC field devices. IC Role / Device Role / Timing Role: Isolated output buffer with wide VDD2 range (9–32 V) accommodating varying field bus voltages and transient tolerance. Use Value: Supports mixed-voltage field deployments (e.g., 12 V sensors + 24 V actuators) using same PCB footprint and firmware, reducing variant management overhead. |
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-IF | Same 1-channel low-side topology and 2.5 A rating, but includes LED1 indicator pin (absent in SI83411BCA-IF); no OPEN_CH or VDD2_WRN pins. | Lacks open-circuit and supply warning diagnostics; suitable only where basic ON/OFF status suffices. | Select SI83411BAA-IF if LED visual feedback is prioritized over fault diagnostics; otherwise SI83411BCA-IF offers superior system-level visibility. |
| SI83411BBA-IF | Identical pinout and electrical specs, but omits VDD2_WRN and OPEN_CH; retains FLT and OE; no channel status indicators. | Reduces diagnostic coverage to fault-only reporting; removes ability to distinguish marginal supply from open load. | Choose SI83411BBA-IF only for cost-sensitive designs where FLT alone satisfies safety monitoring requirements and VDD2 stability is guaranteed. |
Compared with SI83411BAA-IF and SI83411BBA-IF, the SI83411BCA-IF uniquely delivers three independent hardware diagnostics (FLT, OPEN_CH, VDD2_WRN) in a single-channel low-side package - enabling granular root-cause identification without SPI overhead or additional support circuitry.
Availability
SI83411BCA-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-term lifecycle assurance, and certified isolation performance.
Supply support for SI83411BCA-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, with leadership in RF, isolation, and precision timing technologies.
The Si834x family was engineered specifically for industrial automation applications demanding reinforced isolation, comprehensive fault coverage, and seamless migration from optocoupler-based designs - with SI83411BCA-IF targeting single-channel, high-current, diagnostic-rich output stages.
FAQ
What is the maximum continuous output current supported by the SI83411BCA-IF?
The SI83411BCA-IF supports 2.5 A continuous output current at junction temperatures ≤125 °C, with RON specified at 41 mΩ maximum under VDD2 = 24 V and TJ = 25 °C. Derating applies above 85 °C ambient; full 2.5 A capability requires adequate PCB copper area and airflow per Skyworks' thermal guidelines in the datasheet.
Does the SI83411BCA-IF support inrush current mode for driving lamps?
No, the SI83411BCA-IF does not support inrush current mode. Per Skyworks' Ordering Guide (Table 1), this feature is explicitly marked "No" for SI83411BCA-IF. It is optimized for steady-state 2.5 A loads like solenoids and relays, not high-inrush filament lamps.
How does the OPEN_CH pin function on the SI83411BCA-IF?
The OPEN_CH pin is an active-low open-drain indicator that asserts (pulls low) when no load is detected on the B1 output - signaling an open-circuit condition such as broken wiring or disconnected solenoid. It remains deasserted during normal loaded operation and fault conditions like overtemperature or overcurrent.
Can the SI83411BCA-IF be used with a 3.3 V microcontroller logic interface?
Yes, the SI83411BCA-IF accepts logic inputs from 2.25 V–5.5 V, making it fully compatible with standard 3.3 V microcontrollers. The A1 input threshold is referenced to VDD1, and OE is similarly VDD1-referenced - no level-shifting circuitry is required for 3.3 V MCU interfacing.
What isolation certifications apply to the SI83411BCA-IF?
The SI83411BCA-IF carries UL 1577 recognition for 1500 Vrms isolation (1 minute), CSA certification to IEC 62368-1, and CQC approval to GB4943.1. These ratings validate its suitability for reinforced insulation in industrial equipment operating up to 300 V RMS working voltage per IEC 61000-4-5.
SI83411BCA-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:
- 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-IF FAQ
1.How can I place an order for SI83411BCA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83411BCA-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 SI83411BCA-IF reliable?
The price and inventory of SI83411BCA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83411BCA-IF is usually 5 days.
3.What payment methods are accepted for SI83411BCA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83411BCA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83411BCA-IF?
SI83411BCA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83411BCA-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 SI83411BCA-IF?
For technical support, including SI83411BCA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83411BCA-IF requirements.
6.How does Aetrix verify that SI83411BCA-IF is sourced from the original manufacturer or authorized distributors?
All SI83411BCA-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 SI83411BCA-IF meets industry standards.
7.What is the process for return or replacement of SI83411BCA-IF?
All SI83411BCA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83411BCA-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 SI83411BCA-IF part is unused and in its original packaging.
Return procedure for SI83411BCA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83411BCA-IF Tags
-
ISO1212DBQR
Texas Instruments
-
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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